Further cleanup of Span::test_data usage + span fixes (#7595)

# Description

Inspired by #7592

For brevity use `Value::test_{string,int,float,bool}`

Includes fixes to commands that were abusing `Span::test_data` in their
implementation. Now the call span is used where possible or the explicit
`Span::unknonw` is used.

## Command fixes
- Fix abuse of `Span::test_data()` in `query_xml`
- Fix abuse of `Span::test_data()` in `term size`
- Fix abuse of `Span::test_data()` in `seq date`
- Fix two abuses of `Span::test_data` in `nu-cli`
- Change `Span::test_data` to `Span::unknown` in `keybindings listen`
- Add proper call span to `registry query`
- Fix span use in `nu_plugin_query`
- Fix span assignment in `select`
- Use `Span::unknown` instead of `test_data` in more places

## Other
- Use `Value::test_int`/`test_float()` consistently
- More `test_string` and `test_bool`
- Fix unused imports


# User-Facing Changes

Some commands may now provide more helpful spans for downstream use in
errors

crates/nu-cli/src/reedline_config.rs

@@ -7,8 +7,7 @@ use nu_parser::parse;
 use nu_protocol::{
     create_menus,
     engine::{EngineState, Stack, StateWorkingSet},
-    extract_value, Config, IntoPipelineData, ParsedKeybinding, ParsedMenu, PipelineData,
+    extract_value, Config, ParsedKeybinding, ParsedMenu, PipelineData, ShellError, Span, Value,
-    ShellError, Span, Value,
 };
 use reedline::{
     default_emacs_keybindings, default_vi_insert_keybindings, default_vi_normal_keybindings,
@@ -110,7 +109,7 @@ pub(crate) fn add_menus(
             };
 
             let mut temp_stack = Stack::new();
-            let input = Value::nothing(Span::test_data()).into_pipeline_data();
+            let input = PipelineData::Empty;
             let res = eval_block(&engine_state, &mut temp_stack, &block, input, false, false)?;
 
             if let PipelineData::Value(value, None) = res {

crates/nu-cli/src/repl.rs

@@ -639,7 +639,7 @@ pub fn eval_string_with_input(
         false,
         true,
     )
-    .map(|x| x.into_value(Span::test_data()))
+    .map(|x| x.into_value(Span::unknown()))
 }
 
 pub fn get_command_finished_marker(stack: &Stack, engine_state: &EngineState) -> String {

crates/nu-command/src/bits/and.rs

@@ -58,7 +58,7 @@ impl Command for SubCommand {
             Example {
                 description: "Apply bits and to two numbers",
                 example: "2 | bits and 2",
-                result: Some(Value::int(2, Span::test_data())),
+                result: Some(Value::test_int(2)),
             },
             Example {
                 description: "Apply logical and to a list of numbers",

crates/nu-command/src/bits/or.rs

@@ -58,7 +58,7 @@ impl Command for SubCommand {
             Example {
                 description: "Apply bits or to two numbers",
                 example: "2 | bits or 6",
-                result: Some(Value::int(6, Span::test_data())),
+                result: Some(Value::test_int(6)),
             },
             Example {
                 description: "Apply logical or to a list of numbers",

crates/nu-command/src/bits/rotate_left.rs

@@ -81,7 +81,7 @@ impl Command for SubCommand {
             Example {
                 description: "Rotate left a number with 2 bits",
                 example: "17 | bits rol 2",
-                result: Some(Value::int(68, Span::test_data())),
+                result: Some(Value::test_int(68)),
             },
             Example {
                 description: "Rotate left a list of numbers with 2 bits",

crates/nu-command/src/bits/rotate_right.rs

@@ -81,7 +81,7 @@ impl Command for SubCommand {
             Example {
                 description: "Rotate right a number with 60 bits",
                 example: "17 | bits ror 60",
-                result: Some(Value::int(272, Span::test_data())),
+                result: Some(Value::test_int(272)),
             },
             Example {
                 description: "Rotate right a list of numbers of one byte",

crates/nu-command/src/bits/shift_left.rs

@@ -81,17 +81,17 @@ impl Command for SubCommand {
             Example {
                 description: "Shift left a number by 7 bits",
                 example: "2 | bits shl 7",
-                result: Some(Value::int(256, Span::test_data())),
+                result: Some(Value::test_int(256)),
             },
             Example {
                 description: "Shift left a number with 1 byte by 7 bits",
                 example: "2 | bits shl 7 -n 1",
-                result: Some(Value::int(0, Span::test_data())),
+                result: Some(Value::test_int(0)),
             },
             Example {
                 description: "Shift left a signed number by 1 bit",
                 example: "0x7F | bits shl 1 -s",
-                result: Some(Value::int(254, Span::test_data())),
+                result: Some(Value::test_int(254)),
             },
             Example {
                 description: "Shift left a list of numbers",

crates/nu-command/src/bits/shift_right.rs

@@ -81,7 +81,7 @@ impl Command for SubCommand {
             Example {
                 description: "Shift right a number with 2 bits",
                 example: "8 | bits shr 2",
-                result: Some(Value::int(2, Span::test_data())),
+                result: Some(Value::test_int(2)),
             },
             Example {
                 description: "Shift right a list of numbers",

crates/nu-command/src/bits/xor.rs

@@ -57,7 +57,7 @@ impl Command for SubCommand {
             Example {
                 description: "Apply bits xor to two numbers",
                 example: "2 | bits xor 2",
-                result: Some(Value::int(0, Span::test_data())),
+                result: Some(Value::test_int(0)),
             },
             Example {
                 description: "Apply logical xor to a list of numbers",

crates/nu-command/src/bytes/ends_with.rs

@@ -68,17 +68,17 @@ impl Command for BytesEndsWith {
             Example {
                 description: "Checks if binary ends with `0x[AA]`",
                 example: "0x[1F FF AA AA] | bytes ends-with 0x[AA]",
-                result: Some(Value::boolean(true, Span::test_data())),
+                result: Some(Value::test_bool(true)),
             },
             Example {
                 description: "Checks if binary ends with `0x[FF AA AA]`",
                 example: "0x[1F FF AA AA] | bytes ends-with 0x[FF AA AA]",
-                result: Some(Value::boolean(true, Span::test_data())),
+                result: Some(Value::test_bool(true)),
             },
             Example {
                 description: "Checks if binary ends with `0x[11]`",
                 example: "0x[1F FF AA AA] | bytes ends-with 0x[11]",
-                result: Some(Value::boolean(false, Span::test_data())),
+                result: Some(Value::test_bool(false)),
             },
         ]
     }

crates/nu-command/src/bytes/starts_with.rs

@@ -74,17 +74,17 @@ impl Command for BytesStartsWith {
             Example {
                 description: "Checks if binary starts with `0x[1F FF AA]`",
                 example: "0x[1F FF AA AA] | bytes starts-with 0x[1F FF AA]",
-                result: Some(Value::boolean(true, Span::test_data())),
+                result: Some(Value::test_bool(true)),
             },
             Example {
                 description: "Checks if binary starts with `0x[1F]`",
                 example: "0x[1F FF AA AA] | bytes starts-with 0x[1F]",
-                result: Some(Value::boolean(true, Span::test_data())),
+                result: Some(Value::test_bool(true)),
             },
             Example {
                 description: "Checks if binary starts with `0x[1F]`",
                 example: "0x[1F FF AA AA] | bytes starts-with 0x[11]",
-                result: Some(Value::boolean(false, Span::test_data())),
+                result: Some(Value::test_bool(false)),
             },
         ]
     }

crates/nu-command/src/conversions/into/int.rs

@@ -113,7 +113,7 @@ impl Command for SubCommand {
             Example {
                 description: "Convert file size to integer",
                 example: "4KB | into int",
-                result: Some(Value::int(4000, Span::test_data())),
+                result: Some(Value::test_int(4000)),
             },
             Example {
                 description: "Convert bool to integer",

crates/nu-command/src/core_commands/hide.rs

@@ -1,7 +1,7 @@
 use nu_protocol::ast::{Call, Expr, Expression};
 use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{
-    Category, Example, PipelineData, ShellError, Signature, Span, Spanned, SyntaxShape, Type, Value,
+    Category, Example, PipelineData, ShellError, Signature, Spanned, SyntaxShape, Type, Value,
 };
 
 #[derive(Clone)]
@@ -85,7 +85,7 @@ This command is a parser keyword. For details, check:
             Example {
                 description: "Hide an environment variable",
                 example: r#"let-env HZ_ENV_ABC = 1; hide HZ_ENV_ABC; 'HZ_ENV_ABC' in (env).name"#,
-                result: Some(Value::boolean(false, Span::test_data())),
+                result: Some(Value::test_bool(false)),
             },
         ]
     }

crates/nu-command/src/core_commands/hide_env.rs

@@ -2,8 +2,8 @@ use nu_engine::CallExt;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{
-    did_you_mean, Category, Example, PipelineData, ShellError, Signature, Span, Spanned,
+    did_you_mean, Category, Example, PipelineData, ShellError, Signature, Spanned, SyntaxShape,
-    SyntaxShape, Type, Value,
+    Type, Value,
 };
 
 #[derive(Clone)]
@@ -70,7 +70,7 @@ impl Command for HideEnv {
         vec![Example {
             description: "Hide an environment variable",
             example: r#"let-env HZ_ENV_ABC = 1; hide-env HZ_ENV_ABC; 'HZ_ENV_ABC' in (env).name"#,
-            result: Some(Value::boolean(false, Span::test_data())),
+            result: Some(Value::test_bool(false)),
         }]
     }
 }

crates/nu-command/src/core_commands/loop_.rs

@@ -2,7 +2,7 @@ use nu_engine::{eval_block, CallExt};
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Block, Command, EngineState, Stack};
 use nu_protocol::{
-    Category, Example, PipelineData, ShellError, Signature, Span, SyntaxShape, Type, Value,
+    Category, Example, PipelineData, ShellError, Signature, SyntaxShape, Type, Value,
 };
 
 #[derive(Clone)]
@@ -81,7 +81,7 @@ impl Command for Loop {
         vec![Example {
             description: "Loop while a condition is true",
             example: "mut x = 0; loop { if $x > 10 { break }; $x = $x + 1 }; $x",
-            result: Some(Value::int(11, Span::test_data())),
+            result: Some(Value::test_int(11)),
         }]
     }
 }

crates/nu-command/src/example_test.rs

@@ -209,10 +209,7 @@ mod test_examples {
         let mut stack = Stack::new();
 
         // Set up PWD
-        stack.add_env_var(
+        stack.add_env_var("PWD".to_string(), Value::test_string(cwd.to_string_lossy()));
-            "PWD".to_string(),
-            Value::string(cwd.to_string_lossy(), Span::test_data()),
-        );
 
         engine_state
             .merge_env(&mut stack, cwd)
@@ -294,10 +291,7 @@ mod test_examples {
 
         let mut stack = Stack::new();
 
-        stack.add_env_var(
+        stack.add_env_var("PWD".to_string(), Value::test_string(cwd.to_string_lossy()));
-            "PWD".to_string(),
-            Value::string(cwd.to_string_lossy(), Span::test_data()),
-        );
 
         match nu_engine::eval_block(engine_state, &mut stack, &block, input, true, true) {
             Err(err) => panic!("test eval error in `{}`: {:?}", "TODO", err),

crates/nu-command/src/filters/each.rs

@@ -54,11 +54,7 @@ with 'transpose' first."#
     }
 
     fn examples(&self) -> Vec<Example> {
-        let stream_test_1 = vec![
+        let stream_test_1 = vec![Value::test_int(2), Value::test_int(4), Value::test_int(6)];
-            Value::int(2, Span::test_data()),
-            Value::int(4, Span::test_data()),
-            Value::int(6, Span::test_data()),
-        ];
 
         let stream_test_2 = vec![
             Value::Nothing {

crates/nu-command/src/filters/each_while.rs

@@ -42,10 +42,7 @@ impl Command for EachWhile {
     }
 
     fn examples(&self) -> Vec<Example> {
-        let stream_test_1 = vec![
+        let stream_test_1 = vec![Value::test_int(2), Value::test_int(4)];
-            Value::int(2, Span::test_data()),
-            Value::int(4, Span::test_data()),
-        ];
         let stream_test_2 = vec![
             Value::test_string("Output: 1"),
             Value::test_string("Output: 2"),

crates/nu-command/src/filters/empty.rs

@@ -2,7 +2,7 @@ use nu_engine::CallExt;
 use nu_protocol::ast::{Call, CellPath};
 use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{
-    Category, Example, IntoPipelineData, PipelineData, Signature, Span, SyntaxShape, Type, Value,
+    Category, Example, IntoPipelineData, PipelineData, Signature, SyntaxShape, Type, Value,
 };
 
 #[derive(Clone)]
@@ -43,18 +43,18 @@ impl Command for Empty {
             Example {
                 description: "Check if a string is empty",
                 example: "'' | is-empty",
-                result: Some(Value::boolean(true, Span::test_data())),
+                result: Some(Value::test_bool(true)),
             },
             Example {
                 description: "Check if a list is empty",
                 example: "[] | is-empty",
-                result: Some(Value::boolean(true, Span::test_data())),
+                result: Some(Value::test_bool(true)),
             },
             Example {
                 // TODO: revisit empty cell path semantics for a record.
                 description: "Check if more than one column are empty",
                 example: "[[meal size]; [arepa small] [taco '']] | is-empty meal size",
-                result: Some(Value::boolean(false, Span::test_data())),
+                result: Some(Value::test_bool(false)),
             },
         ]
     }

crates/nu-command/src/filters/group.rs

@@ -35,17 +35,11 @@ impl Command for Group {
     fn examples(&self) -> Vec<Example> {
         let stream_test_1 = vec![
             Value::List {
-                vals: vec![
+                vals: vec![Value::test_int(1), Value::test_int(2)],
-                    Value::int(1, Span::test_data()),
-                    Value::int(2, Span::test_data()),
-                ],
                 span: Span::test_data(),
             },
             Value::List {
-                vals: vec![
+                vals: vec![Value::test_int(3), Value::test_int(4)],
-                    Value::int(3, Span::test_data()),
-                    Value::int(4, Span::test_data()),
-                ],
                 span: Span::test_data(),
             },
         ];

crates/nu-command/src/filters/reduce.rs

@@ -3,7 +3,7 @@ use nu_engine::{eval_block, CallExt};
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Closure, Command, EngineState, Stack};
 use nu_protocol::{
-    Example, IntoPipelineData, PipelineData, ShellError, Signature, Span, SyntaxShape, Type, Value,
+    Example, IntoPipelineData, PipelineData, ShellError, Signature, SyntaxShape, Type, Value,
 };
 
 #[derive(Clone)]
@@ -52,17 +52,17 @@ impl Command for Reduce {
             Example {
                 example: "[ 1 2 3 4 ] | reduce {|it, acc| $it + $acc }",
                 description: "Sum values of a list (same as 'math sum')",
-                result: Some(Value::int(10, Span::test_data())),
+                result: Some(Value::test_int(10)),
             },
             Example {
                 example: "[ 8 7 6 ] | reduce {|it, acc, ind| $acc + $it + $ind }",
                 description: "Sum values of a list, plus their indexes",
-                result: Some(Value::int(22, Span::test_data())),
+                result: Some(Value::test_int(22)),
             },
             Example {
                 example: "[ 1 2 3 4 ] | reduce -f 10 {|it, acc| $acc + $it }",
                 description: "Sum values with a starting value (fold)",
-                result: Some(Value::int(20, Span::test_data())),
+                result: Some(Value::test_int(20)),
             },
             Example {
                 example: r#"[ i o t ] | reduce -f "Arthur, King of the Britons" {|it, acc| $acc | str replace -a $it "X" }"#,

crates/nu-command/src/filters/reject.rs

@@ -68,7 +68,7 @@ impl Command for Reject {
                 example: "{a: 1, b: 2} | reject a",
                 result: Some(Value::Record {
                     cols: vec!["b".into()],
-                    vals: vec![Value::int(2, Span::test_data())],
+                    vals: vec![Value::test_int(2)],
                     span: Span::test_data(),
                 }),
             },
@@ -79,7 +79,7 @@ impl Command for Reject {
                     cols: vec!["a".into()],
                     vals: vec![Value::Record {
                         cols: vec!["c".into()],
-                        vals: vec![Value::int(5, Span::test_data())],
+                        vals: vec![Value::test_int(5)],
                         span: Span::test_data(),
                     }],
                     span: Span::test_data(),

crates/nu-command/src/filters/select.rs

@@ -87,7 +87,7 @@ impl Command for Select {
 
 fn select(
     engine_state: &EngineState,
-    span: Span,
+    call_span: Span,
     columns: Vec<CellPath>,
     input: PipelineData,
     ignore_errors: bool,
@@ -102,7 +102,7 @@ fn select(
             Some(PathMember::Int { val, span }) => {
                 if members.len() > 1 {
                     if ignore_errors {
-                        return Ok(Value::nothing(Span::test_data()).into_pipeline_data());
+                        return Ok(Value::nothing(call_span).into_pipeline_data());
                     }
                     return Err(ShellError::GenericError(
                         "Select only allows row numbers for rows".into(),
@@ -166,9 +166,7 @@ fn select(
                             }
                             Err(e) => {
                                 if ignore_errors {
-                                    return Ok(
+                                    return Ok(Value::nothing(call_span).into_pipeline_data());
-                                        Value::nothing(Span::test_data()).into_pipeline_data()
-                                    );
                                 }
                                 return Err(e);
                             }
@@ -202,15 +200,17 @@ fn select(
                             }
                             Err(e) => {
                                 if ignore_errors {
-                                    return Ok(
+                                    return Ok(Value::nothing(call_span).into_pipeline_data());
-                                        Value::nothing(Span::test_data()).into_pipeline_data()
-                                    );
                                 }
                                 return Err(e);
                             }
                         }
                     }
-                    values.push(Value::Record { cols, vals, span });
+                    values.push(Value::Record {
+                        cols,
+                        vals,
+                        span: call_span,
+                    });
                 } else {
                     values.push(x);
                 }
@@ -234,7 +234,7 @@ fn select(
                         }
                         Err(e) => {
                             if ignore_errors {
-                                return Ok(Value::nothing(Span::test_data()).into_pipeline_data());
+                                return Ok(Value::nothing(call_span).into_pipeline_data());
                             }
 
                             return Err(e);
@@ -242,9 +242,13 @@ fn select(
                     }
                 }
 
-                Ok(Value::Record { cols, vals, span }
+                Ok(Value::Record {
-                    .into_pipeline_data()
+                    cols,
-                    .set_metadata(metadata))
+                    vals,
+                    span: call_span,
+                }
+                .into_pipeline_data()
+                .set_metadata(metadata))
             } else {
                 Ok(v.into_pipeline_data().set_metadata(metadata))
             }

crates/nu-command/src/filters/window.rs

@@ -42,66 +42,41 @@ impl Command for Window {
     fn examples(&self) -> Vec<Example> {
         let stream_test_1 = vec![
             Value::List {
-                vals: vec![
+                vals: vec![Value::test_int(1), Value::test_int(2)],
-                    Value::int(1, Span::test_data()),
-                    Value::int(2, Span::test_data()),
-                ],
                 span: Span::test_data(),
             },
             Value::List {
-                vals: vec![
+                vals: vec![Value::test_int(2), Value::test_int(3)],
-                    Value::int(2, Span::test_data()),
-                    Value::int(3, Span::test_data()),
-                ],
                 span: Span::test_data(),
             },
             Value::List {
-                vals: vec![
+                vals: vec![Value::test_int(3), Value::test_int(4)],
-                    Value::int(3, Span::test_data()),
-                    Value::int(4, Span::test_data()),
-                ],
                 span: Span::test_data(),
             },
         ];
 
         let stream_test_2 = vec![
             Value::List {
-                vals: vec![
+                vals: vec![Value::test_int(1), Value::test_int(2)],
-                    Value::int(1, Span::test_data()),
-                    Value::int(2, Span::test_data()),
-                ],
                 span: Span::test_data(),
             },
             Value::List {
-                vals: vec![
+                vals: vec![Value::test_int(4), Value::test_int(5)],
-                    Value::int(4, Span::test_data()),
-                    Value::int(5, Span::test_data()),
-                ],
                 span: Span::test_data(),
             },
             Value::List {
-                vals: vec![
+                vals: vec![Value::test_int(7), Value::test_int(8)],
-                    Value::int(7, Span::test_data()),
-                    Value::int(8, Span::test_data()),
-                ],
                 span: Span::test_data(),
             },
         ];
 
         let stream_test_3 = vec![
             Value::List {
-                vals: vec![
+                vals: vec![Value::test_int(1), Value::test_int(2), Value::test_int(3)],
-                    Value::int(1, Span::test_data()),
-                    Value::int(2, Span::test_data()),
-                    Value::int(3, Span::test_data()),
-                ],
                 span: Span::test_data(),
             },
             Value::List {
-                vals: vec![
+                vals: vec![Value::test_int(4), Value::test_int(5)],
-                    Value::int(4, Span::test_data()),
-                    Value::int(5, Span::test_data()),
-                ],
                 span: Span::test_data(),
             },
         ];

crates/nu-command/src/filters/zip.rs

@@ -36,26 +36,17 @@ impl Command for Zip {
 
     fn examples(&self) -> Vec<Example> {
         let test_row_1 = Value::List {
-            vals: vec![
+            vals: vec![Value::test_int(1), Value::test_int(4)],
-                Value::int(1, Span::test_data()),
-                Value::int(4, Span::test_data()),
-            ],
             span: Span::test_data(),
         };
 
         let test_row_2 = Value::List {
-            vals: vec![
+            vals: vec![Value::test_int(2), Value::test_int(5)],
-                Value::int(2, Span::test_data()),
-                Value::int(5, Span::test_data()),
-            ],
             span: Span::test_data(),
         };
 
         let test_row_3 = Value::List {
-            vals: vec![
+            vals: vec![Value::test_int(3), Value::test_int(6)],
-                Value::int(3, Span::test_data()),
-                Value::int(6, Span::test_data()),
-            ],
             span: Span::test_data(),
         };
 

crates/nu-command/src/formats/from/json.rs

@@ -31,7 +31,7 @@ impl Command for FromJson {
                 description: "Converts json formatted string to table",
                 result: Some(Value::Record {
                     cols: vec!["a".to_string()],
-                    vals: vec![Value::int(1, Span::test_data())],
+                    vals: vec![Value::test_int(1)],
                     span: Span::test_data(),
                 }),
             },
@@ -41,12 +41,9 @@ impl Command for FromJson {
                 result: Some(Value::Record {
                     cols: vec!["a".to_string(), "b".to_string()],
                     vals: vec![
-                        Value::int(1, Span::test_data()),
+                        Value::test_int(1),
                         Value::List {
-                            vals: vec![
+                            vals: vec![Value::test_int(1), Value::test_int(2)],
-                                Value::int(1, Span::test_data()),
-                                Value::int(2, Span::test_data()),
-                            ],
                             span: Span::test_data(),
                         },
                     ],

crates/nu-command/src/formats/from/nuon.rs

@@ -29,7 +29,7 @@ impl Command for FromNuon {
                 description: "Converts nuon formatted string to table",
                 result: Some(Value::Record {
                     cols: vec!["a".to_string()],
-                    vals: vec![Value::int(1, Span::test_data())],
+                    vals: vec![Value::test_int(1)],
                     span: Span::test_data(),
                 }),
             },
@@ -39,12 +39,9 @@ impl Command for FromNuon {
                 result: Some(Value::Record {
                     cols: vec!["a".to_string(), "b".to_string()],
                     vals: vec![
-                        Value::int(1, Span::test_data()),
+                        Value::test_int(1),
                         Value::List {
-                            vals: vec![
+                            vals: vec![Value::test_int(1), Value::test_int(2)],
-                                Value::int(1, Span::test_data()),
-                                Value::int(2, Span::test_data()),
-                            ],
                             span: Span::test_data(),
                         },
                     ],

crates/nu-command/src/formats/from/toml.rs

@@ -29,7 +29,7 @@ impl Command for FromToml {
                 description: "Converts toml formatted string to record",
                 result: Some(Value::Record {
                     cols: vec!["a".to_string()],
-                    vals: vec![Value::int(1, Span::test_data())],
+                    vals: vec![Value::test_int(1)],
                     span: Span::test_data(),
                 }),
             },
@@ -40,12 +40,9 @@ b = [1, 2]' | from toml",
                 result: Some(Value::Record {
                     cols: vec!["a".to_string(), "b".to_string()],
                     vals: vec![
-                        Value::int(1, Span::test_data()),
+                        Value::test_int(1),
                         Value::List {
-                            vals: vec![
+                            vals: vec![Value::test_int(1), Value::test_int(2)],
-                                Value::int(1, Span::test_data()),
-                                Value::int(2, Span::test_data()),
-                            ],
                             span: Span::test_data(),
                         },
                     ],

crates/nu-command/src/formats/from/xml.rs

@@ -200,7 +200,7 @@ mod tests {
     use nu_protocol::{Spanned, Value};
 
     fn string(input: impl Into<String>) -> Value {
-        Value::string(input, Span::test_data())
+        Value::test_string(input)
     }
 
     fn row(entries: IndexMap<String, Value>) -> Value {

crates/nu-command/src/formats/from/yaml.rs

@@ -203,7 +203,7 @@ pub fn get_examples() -> Vec<Example> {
             description: "Converts yaml formatted string to table",
             result: Some(Value::Record {
                 cols: vec!["a".to_string()],
-                vals: vec![Value::int(1, Span::test_data())],
+                vals: vec![Value::test_int(1)],
                 span: Span::test_data(),
             }),
         },

crates/nu-command/src/generators/seq_date.rs

@@ -59,8 +59,6 @@ impl Command for SeqDate {
     }
 
     fn examples(&self) -> Vec<Example> {
-        let span = Span::test_data();
-
         vec![
             Example {
                 description: "print the next 10 days in YYYY-MM-DD format with newline separator",
@@ -82,18 +80,18 @@ impl Command for SeqDate {
                 example: "seq date -b '2020-01-01' -e '2020-01-10'",
                 result: Some(Value::List {
                     vals: vec![
-                        Value::String { val: "2020-01-01".into(), span, },
+                        Value::test_string("2020-01-01"),
-                        Value::String { val: "2020-01-02".into(), span, },
+                        Value::test_string("2020-01-02"),
-                        Value::String { val: "2020-01-03".into(), span, },
+                        Value::test_string("2020-01-03"),
-                        Value::String { val: "2020-01-04".into(), span, },
+                        Value::test_string("2020-01-04"),
-                        Value::String { val: "2020-01-05".into(), span, },
+                        Value::test_string("2020-01-05"),
-                        Value::String { val: "2020-01-06".into(), span, },
+                        Value::test_string("2020-01-06"),
-                        Value::String { val: "2020-01-07".into(), span, },
+                        Value::test_string("2020-01-07"),
-                        Value::String { val: "2020-01-08".into(), span, },
+                        Value::test_string("2020-01-08"),
-                        Value::String { val: "2020-01-09".into(), span, },
+                        Value::test_string("2020-01-09"),
-                        Value::String { val: "2020-01-10".into(), span, },
+                        Value::test_string("2020-01-10"),
                     ],
-                    span,
+                    span: Span::test_data(),
                 }),
             },
             Example {
@@ -101,15 +99,15 @@ impl Command for SeqDate {
                 example: "seq date -b '2020-01-01' -e '2020-01-31' -n 5",
                 result: Some(Value::List {
                    vals: vec![
-                    Value::String { val: "2020-01-01".into(), span, },
+                    Value::test_string("2020-01-01"),
-                    Value::String { val: "2020-01-06".into(), span, },
+                    Value::test_string("2020-01-06"),
-                    Value::String { val: "2020-01-11".into(), span, },
+                    Value::test_string("2020-01-11"),
-                    Value::String { val: "2020-01-16".into(), span, },
+                    Value::test_string("2020-01-16"),
-                    Value::String { val: "2020-01-21".into(), span, },
+                    Value::test_string("2020-01-21"),
-                    Value::String { val: "2020-01-26".into(), span, },
+                    Value::test_string("2020-01-26"),
-                    Value::String { val: "2020-01-31".into(), span, },
+                    Value::test_string("2020-01-31"),
                     ],
-                    span,
+                    span: Span::test_data(),
                 }),
             },
         ]
@@ -155,7 +153,7 @@ impl Command for SeqDate {
 
         let inc = match increment {
             Some(i) => Value::int(i.item, i.span),
-            _ => Value::int(1_i64, Span::test_data()),
+            _ => Value::int(1_i64, call.head),
         };
 
         let day_count = days.map(|i| Value::int(i.item, i.span));
@@ -165,10 +163,10 @@ impl Command for SeqDate {
             rev = reverse;
         }
 
-        Ok(
+        Ok(run_seq_dates(
-            run_seq_dates(outformat, informat, begin, end, inc, day_count, rev)?
+            outformat, informat, begin, end, inc, day_count, rev, call.head,
-                .into_pipeline_data(),
+        )?
-        )
+        .into_pipeline_data())
     }
 }
 
@@ -189,6 +187,7 @@ pub fn run_seq_dates(
     increment: Value,
     day_count: Option<Value>,
     reverse: bool,
+    call_span: Span,
 ) -> Result<Value, ShellError> {
     let today = Local::now().date_naive();
     // if cannot convert , it will return error
@@ -243,7 +242,7 @@ pub fn run_seq_dates(
                 return Err(ShellError::GenericError(
                     e.to_string(),
                     "Failed to parse date".to_string(),
-                    Some(Span::test_data()),
+                    Some(call_span),
                     None,
                     Vec::new(),
                 ))
@@ -259,7 +258,7 @@ pub fn run_seq_dates(
                 return Err(ShellError::GenericError(
                     e.to_string(),
                     "Failed to parse date".to_string(),
-                    Some(Span::test_data()),
+                    Some(call_span),
                     None,
                     Vec::new(),
                 ))
@@ -286,7 +285,7 @@ pub fn run_seq_dates(
                 return Err(ShellError::GenericError(
                     "integer value too large".to_string(),
                     "integer value too large".to_string(),
-                    Some(Span::test_data()),
+                    Some(call_span),
                     None,
                     Vec::new(),
                 ));
@@ -308,7 +307,7 @@ pub fn run_seq_dates(
         return Err(ShellError::GenericError(
             "date is out of range".to_string(),
             "date is out of range".to_string(),
-            Some(Span::test_data()),
+            Some(call_span),
             None,
             Vec::new(),
         ));
@@ -317,7 +316,7 @@ pub fn run_seq_dates(
     let mut ret = vec![];
     loop {
         let date_string = &next.format(&out_format).to_string();
-        ret.push(Value::string(date_string, Span::test_data()));
+        ret.push(Value::string(date_string, call_span));
         next += Duration::days(step_size);
 
         if is_out_of_range(next) {
@@ -327,7 +326,7 @@ pub fn run_seq_dates(
 
     Ok(Value::List {
         vals: ret,
-        span: Span::test_data(),
+        span: call_span,
     })
 }
 

crates/nu-command/src/math/abs.rs

@@ -46,7 +46,7 @@ impl Command for SubCommand {
             result: Some(Value::List {
                 vals: vec![
                     Value::test_int(50),
-                    Value::float(100.0, Span::test_data()),
+                    Value::test_float(100.0),
                     Value::test_int(25),
                 ],
                 span: Span::test_data(),

crates/nu-command/src/math/avg.rs

@@ -40,7 +40,7 @@ impl Command for SubCommand {
         vec![Example {
             description: "Compute the average of a list of numbers",
             example: "[-50 100.0 25] | math avg",
-            result: Some(Value::float(25.0, Span::test_data())),
+            result: Some(Value::test_float(25.0)),
         }]
     }
 }

crates/nu-command/src/math/eval.rs

@@ -47,7 +47,7 @@ impl Command for SubCommand {
         vec![Example {
             description: "Evaluate math in the pipeline",
             example: "'10 / 4' | math eval",
-            result: Some(Value::float(2.5, Span::test_data())),
+            result: Some(Value::test_float(2.5)),
         }]
     }
 }

crates/nu-command/src/math/median.rs

@@ -46,7 +46,7 @@ impl Command for SubCommand {
             Example {
                 description: "Compute the median of a list of numbers",
                 example: "[3 8 9 12 12 15] | math median",
-                result: Some(Value::float(10.5, Span::test_data())),
+                result: Some(Value::test_float(10.5)),
             },
             Example {
                 description: "Compute the medians of the columns of a table",

crates/nu-command/src/math/round.rs

@@ -68,9 +68,9 @@ impl Command for SubCommand {
                 example: "[1.555 2.333 -3.111] | math round -p 2",
                 result: Some(Value::List {
                     vals: vec![
-                        Value::float(1.56, Span::test_data()),
+                        Value::test_float(1.56),
-                        Value::float(2.33, Span::test_data()),
+                        Value::test_float(2.33),
-                        Value::float(-3.11, Span::test_data()),
+                        Value::test_float(-3.11),
                     ],
                     span: Span::test_data(),
                 }),

crates/nu-command/src/math/stddev.rs

@@ -54,12 +54,12 @@ impl Command for SubCommand {
             Example {
                 description: "Compute the standard deviation of a list of numbers",
                 example: "[1 2 3 4 5] | math stddev",
-                result: Some(Value::float(std::f64::consts::SQRT_2, Span::test_data())),
+                result: Some(Value::test_float(std::f64::consts::SQRT_2)),
             },
             Example {
                 description: "Compute the sample standard deviation of a list of numbers",
                 example: "[1 2 3 4 5] | math stddev -s",
-                result: Some(Value::float(1.5811388300841898, Span::test_data())),
+                result: Some(Value::test_float(1.5811388300841898)),
             },
         ]
     }

crates/nu-command/src/math/variance.rs

@@ -46,12 +46,12 @@ impl Command for SubCommand {
             Example {
                 description: "Get the variance of a list of numbers",
                 example: "[1 2 3 4 5] | math variance",
-                result: Some(Value::float(2.0, Span::test_data())),
+                result: Some(Value::test_float(2.0)),
             },
             Example {
                 description: "Get the sample variance of a list of numbers",
                 example: "[1 2 3 4 5] | math variance -s",
-                result: Some(Value::float(2.5, Span::test_data())),
+                result: Some(Value::test_float(2.5)),
             },
         ]
     }

crates/nu-command/src/network/port.rs

@@ -5,7 +5,7 @@ use nu_protocol::IntoPipelineData;
 use std::net::{Ipv4Addr, SocketAddr, SocketAddrV4, TcpListener};
 
 use nu_protocol::{
-    Category, Example, PipelineData, ShellError, Signature, Span, SyntaxShape, Type, Value,
+    Category, Example, PipelineData, ShellError, Signature, SyntaxShape, Type, Value,
 };
 
 #[derive(Clone)]
@@ -51,7 +51,7 @@ impl Command for SubCommand {
             Example {
                 description: "get a free port between 3121 and 4000",
                 example: "port 3121 4000",
-                result: Some(Value::int(3121, Span::test_data())),
+                result: Some(Value::test_int(3121)),
             },
             Example {
                 description: "get a free port from system",

crates/nu-command/src/path/exists.rs

@@ -75,7 +75,7 @@ If you need to distinguish dirs and files, please use `path type`."#
             Example {
                 description: "Check if a file exists",
                 example: "'C:\\Users\\joe\\todo.txt' | path exists",
-                result: Some(Value::boolean(false, Span::test_data())),
+                result: Some(Value::test_bool(false)),
             },
             Example {
                 description: "Check if a file exists in a column",
@@ -91,7 +91,7 @@ If you need to distinguish dirs and files, please use `path type`."#
             Example {
                 description: "Check if a file exists",
                 example: "'/home/joe/todo.txt' | path exists",
-                result: Some(Value::boolean(false, Span::test_data())),
+                result: Some(Value::test_bool(false)),
             },
             Example {
                 description: "Check if a file exists in a column",

crates/nu-command/src/platform/dir_info.rs

@@ -255,13 +255,13 @@ impl From<FileInfo> for Value {
         });
 
         cols.push("directories".into());
-        vals.push(Value::nothing(Span::test_data()));
+        vals.push(Value::nothing(Span::unknown()));
 
         cols.push("files".into());
-        vals.push(Value::nothing(Span::test_data()));
+        vals.push(Value::nothing(Span::unknown()));
 
         // cols.push("errors".into());
-        // vals.push(Value::nothing(Span::test_data()));
+        // vals.push(Value::nothing(Span::unknown()));
 
         Value::Record {
             cols,

crates/nu-command/src/platform/reedline_commands/keybindings_listen.rs

@@ -93,7 +93,7 @@ pub fn print_events(engine_state: &EngineState) -> Result<Value, ShellError> {
     }
     terminal::disable_raw_mode()?;
 
-    Ok(Value::nothing(Span::test_data()))
+    Ok(Value::nothing(Span::unknown()))
 }
 
 // this fn is totally ripped off from crossterm's examples
@@ -113,12 +113,12 @@ fn print_events_helper(event: Event) -> Result<Value, ShellError> {
                         "flags".into(),
                     ],
                     vals: vec![
-                        Value::string(format!("{}", c), Span::test_data()),
+                        Value::string(format!("{}", c), Span::unknown()),
-                        Value::string(format!("{:#08x}", u32::from(c)), Span::test_data()),
+                        Value::string(format!("{:#08x}", u32::from(c)), Span::unknown()),
-                        Value::string(format!("{:?}", modifiers), Span::test_data()),
+                        Value::string(format!("{:?}", modifiers), Span::unknown()),
-                        Value::string(format!("{:#08b}", modifiers), Span::test_data()),
+                        Value::string(format!("{:#08b}", modifiers), Span::unknown()),
                     ],
-                    span: Span::test_data(),
+                    span: Span::unknown(),
                 };
                 Ok(record)
             }
@@ -126,11 +126,11 @@ fn print_events_helper(event: Event) -> Result<Value, ShellError> {
                 let record = Value::Record {
                     cols: vec!["code".into(), "modifier".into(), "flags".into()],
                     vals: vec![
-                        Value::string(format!("{:?}", code), Span::test_data()),
+                        Value::string(format!("{:?}", code), Span::unknown()),
-                        Value::string(format!("{:?}", modifiers), Span::test_data()),
+                        Value::string(format!("{:?}", modifiers), Span::unknown()),
-                        Value::string(format!("{:#08b}", modifiers), Span::test_data()),
+                        Value::string(format!("{:#08b}", modifiers), Span::unknown()),
                     ],
-                    span: Span::test_data(),
+                    span: Span::unknown(),
                 };
                 Ok(record)
             }
@@ -138,8 +138,8 @@ fn print_events_helper(event: Event) -> Result<Value, ShellError> {
     } else {
         let record = Value::Record {
             cols: vec!["event".into()],
-            vals: vec![Value::string(format!("{:?}", event), Span::test_data())],
+            vals: vec![Value::string(format!("{:?}", event), Span::unknown())],
-            span: Span::test_data(),
+            span: Span::unknown(),
         };
         Ok(record)
     }

crates/nu-command/src/platform/term_size.rs

@@ -1,8 +1,6 @@
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::{
+use nu_protocol::{Category, Example, IntoPipelineData, PipelineData, Signature, Type, Value};
-    Category, Example, IntoPipelineData, PipelineData, Signature, Span, Type, Value,
-};
 use terminal_size::{terminal_size, Height, Width};
 
 #[derive(Clone)]
@@ -66,8 +64,8 @@ impl Command for TermSize {
         Ok(Value::Record {
             cols: vec!["columns".into(), "rows".into()],
             vals: vec![
-                Value::int(cols.0 as i64, Span::test_data()),
+                Value::int(cols.0 as i64, head),
-                Value::int(rows.0 as i64, Span::test_data()),
+                Value::int(rows.0 as i64, head),
             ],
             span: head,
         }

crates/nu-command/src/sort_utils.rs

@@ -104,7 +104,7 @@ pub fn sort(
                 for col in &sort_columns {
                     let val = match item.get_data_by_key(col) {
                         Some(v) => v,
-                        None => Value::nothing(Span::test_data()),
+                        None => Value::nothing(Span::unknown()),
                     };
                     vals.push(val);
                 }

crates/nu-command/src/strings/encode_decode/base64.rs

@@ -249,7 +249,7 @@ mod tests {
 
     #[test]
     fn base64_decode_binhex() {
-        let word = Value::string("A5\"KC9jRB@IIF'8bF!", Span::test_data());
+        let word = Value::test_string("A5\"KC9jRB@IIF'8bF!");
         let expected = Value::binary(b"a binhex test".as_slice(), Span::test_data());
 
         let actual = action(
@@ -272,7 +272,7 @@ mod tests {
 
     #[test]
     fn base64_decode_binhex_with_new_line_input() {
-        let word = Value::string("A5\"KC9jRB\n@IIF'8bF!", Span::test_data());
+        let word = Value::test_string("A5\"KC9jRB\n@IIF'8bF!");
         let expected = Value::binary(b"a binhex test".as_slice(), Span::test_data());
 
         let actual = action(

crates/nu-command/src/strings/encode_decode/encode_base64.rs

@@ -2,7 +2,7 @@ use super::base64::{operate, ActionType, CHARACTER_SET_DESC};
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{
-    Category, Example, PipelineData, ShellError, Signature, Span, SyntaxShape, Type, Value,
+    Category, Example, PipelineData, ShellError, Signature, SyntaxShape, Type, Value,
 };
 
 #[derive(Clone)]
@@ -54,7 +54,7 @@ impl Command for EncodeBase64 {
             Example {
                 description: "Encode a string with the binhex character set",
                 example: "'Some Data' | encode base64 --character-set binhex",
-                result: Some(Value::string(r#"7epXB5"%A@4J"#, Span::test_data())),
+                result: Some(Value::test_string(r#"7epXB5"%A@4J"#)),
             },
         ]
     }

crates/nu-command/src/strings/size.rs

@@ -55,11 +55,11 @@ impl Command for Size {
                         "graphemes".into(),
                     ],
                     vals: vec![
-                        Value::int(1, Span::test_data()),
+                        Value::test_int(1),
-                        Value::int(7, Span::test_data()),
+                        Value::test_int(7),
-                        Value::int(38, Span::test_data()),
+                        Value::test_int(38),
-                        Value::int(38, Span::test_data()),
+                        Value::test_int(38),
-                        Value::int(38, Span::test_data()),
+                        Value::test_int(38),
                     ],
                     span: Span::test_data(),
                 }),
@@ -76,11 +76,11 @@ impl Command for Size {
                         "graphemes".into(),
                     ],
                     vals: vec![
-                        Value::int(1, Span::test_data()),
+                        Value::test_int(1),
-                        Value::int(6, Span::test_data()),
+                        Value::test_int(6),
-                        Value::int(18, Span::test_data()),
+                        Value::test_int(18),
-                        Value::int(6, Span::test_data()),
+                        Value::test_int(6),
-                        Value::int(6, Span::test_data()),
+                        Value::test_int(6),
                     ],
                     span: Span::test_data(),
                 }),
@@ -97,11 +97,11 @@ impl Command for Size {
                         "graphemes".into(),
                     ],
                     vals: vec![
-                        Value::int(1, Span::test_data()),
+                        Value::test_int(1),
-                        Value::int(2, Span::test_data()),
+                        Value::test_int(2),
-                        Value::int(15, Span::test_data()),
+                        Value::test_int(15),
-                        Value::int(14, Span::test_data()),
+                        Value::test_int(14),
-                        Value::int(13, Span::test_data()),
+                        Value::test_int(13),
                     ],
                     span: Span::test_data(),
                 }),

crates/nu-command/src/strings/str_/contains.rs

@@ -73,12 +73,12 @@ impl Command for SubCommand {
             Example {
                 description: "Check if input contains string",
                 example: "'my_library.rb' | str contains '.rb'",
-                result: Some(Value::boolean(true, Span::test_data())),
+                result: Some(Value::test_bool(true)),
             },
             Example {
                 description: "Check if input contains string case insensitive",
                 example: "'my_library.rb' | str contains -i '.RB'",
-                result: Some(Value::boolean(true, Span::test_data())),
+                result: Some(Value::test_bool(true)),
             },
             Example {
                 description: "Check if input contains string in a table",
@@ -86,10 +86,7 @@ impl Command for SubCommand {
                 result: Some(Value::List {
                     vals: vec![Value::Record {
                         cols: vec!["ColA".to_string(), "ColB".to_string()],
-                        vals: vec![
+                        vals: vec![Value::test_bool(true), Value::test_int(100)],
-                            Value::boolean(true, Span::test_data()),
-                            Value::test_int(100),
-                        ],
                         span: Span::test_data(),
                     }],
                     span: Span::test_data(),
@@ -101,10 +98,7 @@ impl Command for SubCommand {
                 result: Some(Value::List {
                     vals: vec![Value::Record {
                         cols: vec!["ColA".to_string(), "ColB".to_string()],
-                        vals: vec![
+                        vals: vec![Value::test_bool(true), Value::test_int(100)],
-                            Value::boolean(true, Span::test_data()),
-                            Value::test_int(100),
-                        ],
                         span: Span::test_data(),
                     }],
                     span: Span::test_data(),
@@ -116,10 +110,7 @@ impl Command for SubCommand {
                 result: Some(Value::List {
                     vals: vec![Value::Record {
                         cols: vec!["ColA".to_string(), "ColB".to_string()],
-                        vals: vec![
+                        vals: vec![Value::test_bool(true), Value::test_bool(true)],
-                            Value::boolean(true, Span::test_data()),
-                            Value::boolean(true, Span::test_data()),
-                        ],
                         span: Span::test_data(),
                     }],
                     span: Span::test_data(),
@@ -128,16 +119,16 @@ impl Command for SubCommand {
             Example {
                 description: "Check if input string contains 'banana'",
                 example: "'hello' | str contains 'banana'",
-                result: Some(Value::boolean(false, Span::test_data())),
+                result: Some(Value::test_bool(false)),
             },
             Example {
                 description: "Check if list contains string",
                 example: "[one two three] | str contains o",
                 result: Some(Value::List {
                     vals: vec![
-                        Value::boolean(true, Span::test_data()),
+                        Value::test_bool(true),
-                        Value::boolean(true, Span::test_data()),
+                        Value::test_bool(true),
-                        Value::boolean(false, Span::test_data()),
+                        Value::test_bool(false),
                     ],
                     span: Span::test_data(),
                 }),
@@ -147,9 +138,9 @@ impl Command for SubCommand {
                 example: "[one two three] | str contains -n o",
                 result: Some(Value::List {
                     vals: vec![
-                        Value::boolean(false, Span::test_data()),
+                        Value::test_bool(false),
-                        Value::boolean(false, Span::test_data()),
+                        Value::test_bool(false),
-                        Value::boolean(true, Span::test_data()),
+                        Value::test_bool(true),
                     ],
                     span: Span::test_data(),
                 }),

crates/nu-command/src/strings/str_/ends_with.rs

@@ -67,12 +67,12 @@ impl Command for SubCommand {
             Example {
                 description: "Checks if string ends with '.rb'",
                 example: "'my_library.rb' | str ends-with '.rb'",
-                result: Some(Value::boolean(true, Span::test_data())),
+                result: Some(Value::test_bool(true)),
             },
             Example {
                 description: "Checks if string ends with '.txt'",
                 example: "'my_library.rb' | str ends-with '.txt'",
-                result: Some(Value::boolean(false, Span::test_data())),
+                result: Some(Value::test_bool(false)),
             },
         ]
     }

crates/nu-command/src/strings/str_/starts_with.rs

@@ -70,17 +70,17 @@ impl Command for SubCommand {
             Example {
                 description: "Checks if input string starts with 'my'",
                 example: "'my_library.rb' | str starts-with 'my'",
-                result: Some(Value::boolean(true, Span::test_data())),
+                result: Some(Value::test_bool(true)),
             },
             Example {
                 description: "Checks if input string starts with 'my'",
                 example: "'Cargo.toml' | str starts-with 'Car'",
-                result: Some(Value::boolean(true, Span::test_data())),
+                result: Some(Value::test_bool(true)),
             },
             Example {
                 description: "Checks if input string starts with 'my'",
                 example: "'Cargo.toml' | str starts-with '.toml'",
-                result: Some(Value::boolean(false, Span::test_data())),
+                result: Some(Value::test_bool(false)),
             },
         ]
     }

crates/nu-command/src/strings/str_/substring.rs

@@ -333,7 +333,7 @@ mod tests {
                 Span::test_data(),
             );
 
-            assert_eq!(actual, Value::string(expected, Span::test_data()));
+            assert_eq!(actual, Value::test_string(expected));
         }
     }
 }

crates/nu-command/src/strings/str_/trim/trim_.rs

@@ -302,7 +302,7 @@ mod tests {
             cols: cols.iter().map(|x| x.to_string()).collect(),
             vals: vals
                 .iter()
-                .map(|x| Value::string(x.to_string(), Span::test_data()))
+                .map(|x| Value::test_string(x.to_string()))
                 .collect(),
             span: Span::test_data(),
         }
@@ -312,7 +312,7 @@ mod tests {
         Value::List {
             vals: vals
                 .iter()
-                .map(|x| Value::string(x.to_string(), Span::test_data()))
+                .map(|x| Value::test_string(x.to_string()))
                 .collect(),
             span: Span::test_data(),
         }
@@ -477,7 +477,7 @@ mod tests {
         let row = Value::List {
             vals: vec![
                 Value::test_string("  nu      shell   "),
-                Value::int(65, Span::test_data()),
+                Value::test_int(65),
                 Value::test_string("  d"),
             ],
             span: Span::test_data(),
@@ -485,7 +485,7 @@ mod tests {
         let expected = Value::List {
             vals: vec![
                 Value::test_string("nushell"),
-                Value::int(65, Span::test_data()),
+                Value::test_int(65),
                 Value::test_string("d"),
             ],
             span: Span::test_data(),
@@ -549,7 +549,7 @@ mod tests {
         let row = Value::List {
             vals: vec![
                 Value::test_string("##nu####shell##"),
-                Value::int(65, Span::test_data()),
+                Value::test_int(65),
                 Value::test_string("#d"),
             ],
             span: Span::test_data(),
@@ -557,7 +557,7 @@ mod tests {
         let expected = Value::List {
             vals: vec![
                 Value::test_string("nushell"),
-                Value::int(65, Span::test_data()),
+                Value::test_int(65),
                 Value::test_string("d"),
             ],
             span: Span::test_data(),
@@ -659,7 +659,7 @@ mod tests {
         let row = Value::List {
             vals: vec![
                 Value::test_string("  a  "),
-                Value::int(65, Span::test_data()),
+                Value::test_int(65),
                 Value::test_string(" d"),
             ],
             span: Span::test_data(),
@@ -667,7 +667,7 @@ mod tests {
         let expected = Value::List {
             vals: vec![
                 Value::test_string("a  "),
-                Value::int(65, Span::test_data()),
+                Value::test_int(65),
                 Value::test_string("d"),
             ],
             span: Span::test_data(),
@@ -784,7 +784,7 @@ mod tests {
         let row = Value::List {
             vals: vec![
                 Value::test_string("  a  "),
-                Value::int(65, Span::test_data()),
+                Value::test_int(65),
                 Value::test_string(" d"),
             ],
             span: Span::test_data(),
@@ -792,7 +792,7 @@ mod tests {
         let expected = Value::List {
             vals: vec![
                 Value::test_string("  a"),
-                Value::int(65, Span::test_data()),
+                Value::test_int(65),
                 Value::test_string(" d"),
             ],
             span: Span::test_data(),
@@ -911,7 +911,7 @@ mod tests {
         let row = Value::List {
             vals: vec![
                 Value::test_string("  a    b     c    d  "),
-                Value::int(65, Span::test_data()),
+                Value::test_int(65),
                 Value::test_string(" b c  d e   f"),
             ],
             span: Span::test_data(),
@@ -919,7 +919,7 @@ mod tests {
         let expected = Value::List {
             vals: vec![
                 Value::test_string("a b c d"),
-                Value::int(65, Span::test_data()),
+                Value::test_int(65),
                 Value::test_string("b c d e f"),
             ],
             span: Span::test_data(),

crates/nu-command/src/system/registry_query.rs

@@ -94,6 +94,8 @@ fn registry_query(
     stack: &mut Stack,
     call: &Call,
 ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    let call_span = call.head;
+
     let registry_key: Spanned<String> = call.req(engine_state, stack, 0)?;
     let registry_key_span = &registry_key.clone().span;
     let registry_value: Option<Spanned<String>> = call.opt(engine_state, stack, 1)?;
@@ -112,18 +114,18 @@ fn registry_query(
         key: registry_key.item,
     };
 
-    let reg_key = get_reg_key(reg_params)?;
+    let reg_key = get_reg_key(reg_params, call_span)?;
 
     if registry_value.is_none() {
         let mut reg_values = vec![];
         for (name, val) in reg_key.enum_values().flatten() {
-            let (nu_value, reg_type) = reg_value_to_nu_value(val);
+            let (nu_value, reg_type) = reg_value_to_nu_value(val, call_span);
             reg_values.push(Value::Record {
                 cols: vec!["name".to_string(), "value".to_string(), "type".to_string()],
                 vals: vec![
-                    Value::string(name, Span::test_data()),
+                    Value::string(name, call_span),
                     nu_value,
-                    Value::string(format!("{:?}", reg_type), Span::test_data()),
+                    Value::string(format!("{:?}", reg_type), call_span),
                 ],
                 span: *registry_key_span,
             })
@@ -135,13 +137,13 @@ fn registry_query(
                 let reg_value = reg_key.get_raw_value(value.item.as_str());
                 match reg_value {
                     Ok(val) => {
-                        let (nu_value, reg_type) = reg_value_to_nu_value(val);
+                        let (nu_value, reg_type) = reg_value_to_nu_value(val, call_span);
                         Ok(Value::Record {
                             cols: vec!["name".to_string(), "value".to_string(), "type".to_string()],
                             vals: vec![
-                                Value::string(value.item, Span::test_data()),
+                                Value::string(value.item, call_span),
                                 nu_value,
-                                Value::string(format!("{:?}", reg_type), Span::test_data()),
+                                Value::string(format!("{:?}", reg_type), call_span),
                             ],
                             span: value.span,
                         }
@@ -156,12 +158,12 @@ fn registry_query(
                     )),
                 }
             }
-            None => Ok(Value::nothing(Span::test_data()).into_pipeline_data()),
+            None => Ok(Value::nothing(call_span).into_pipeline_data()),
         }
     }
 }
 
-fn get_reg_key(reg_params: RegistryQueryArgs) -> Result<RegKey, ShellError> {
+fn get_reg_key(reg_params: RegistryQueryArgs, call_span: Span) -> Result<RegKey, ShellError> {
     let mut key_count = 0;
     let registry_key = if reg_params.hkcr {
         key_count += 1;
@@ -201,7 +203,7 @@ fn get_reg_key(reg_params: RegistryQueryArgs) -> Result<RegKey, ShellError> {
         return Err(ShellError::GenericError(
             "Only one registry key can be specified".into(),
             "Only one registry key can be specified".into(),
-            Some(Span::test_data()),
+            Some(call_span),
             None,
             Vec::new(),
         ));
@@ -211,59 +213,57 @@ fn get_reg_key(reg_params: RegistryQueryArgs) -> Result<RegKey, ShellError> {
 
 fn reg_value_to_nu_value(
     reg_value: winreg::RegValue,
+    call_span: Span,
 ) -> (nu_protocol::Value, winreg::enums::RegType) {
     match reg_value.vtype {
-        REG_NONE => (Value::nothing(Span::test_data()), reg_value.vtype),
+        REG_NONE => (Value::nothing(call_span), reg_value.vtype),
         REG_SZ => (
-            Value::string(reg_value.to_string(), Span::test_data()),
+            Value::string(reg_value.to_string(), call_span),
             reg_value.vtype,
         ),
         REG_EXPAND_SZ => (
-            Value::string(reg_value.to_string(), Span::test_data()),
+            Value::string(reg_value.to_string(), call_span),
-            reg_value.vtype,
-        ),
-        REG_BINARY => (
-            Value::binary(reg_value.bytes, Span::test_data()),
             reg_value.vtype,
         ),
+        REG_BINARY => (Value::binary(reg_value.bytes, call_span), reg_value.vtype),
         REG_DWORD => (
             Value::int(
                 unsafe { *(reg_value.bytes.as_ptr() as *const u32) } as i64,
-                Span::test_data(),
+                call_span,
             ),
             reg_value.vtype,
         ),
         REG_DWORD_BIG_ENDIAN => (
             Value::int(
                 unsafe { *(reg_value.bytes.as_ptr() as *const u32) } as i64,
-                Span::test_data(),
+                call_span,
             ),
             reg_value.vtype,
         ),
         REG_LINK => (
-            Value::string(reg_value.to_string(), Span::test_data()),
+            Value::string(reg_value.to_string(), call_span),
             reg_value.vtype,
         ),
         REG_MULTI_SZ => (
-            Value::string(reg_value.to_string(), Span::test_data()),
+            Value::string(reg_value.to_string(), call_span),
             reg_value.vtype,
         ),
         REG_RESOURCE_LIST => (
-            Value::string(reg_value.to_string(), Span::test_data()),
+            Value::string(reg_value.to_string(), call_span),
             reg_value.vtype,
         ),
         REG_FULL_RESOURCE_DESCRIPTOR => (
-            Value::string(reg_value.to_string(), Span::test_data()),
+            Value::string(reg_value.to_string(), call_span),
             reg_value.vtype,
         ),
         REG_RESOURCE_REQUIREMENTS_LIST => (
-            Value::string(reg_value.to_string(), Span::test_data()),
+            Value::string(reg_value.to_string(), call_span),
             reg_value.vtype,
         ),
         REG_QWORD => (
             Value::int(
                 unsafe { *(reg_value.bytes.as_ptr() as *const u32) } as i64,
-                Span::test_data(),
+                call_span,
             ),
             reg_value.vtype,
         ),

crates/nu-engine/src/env.rs

@@ -410,7 +410,7 @@ fn ensure_path(scope: &mut HashMap<String, Value>, env_path_name: &str) -> Optio
                 Ok(sp) => sp,
                 Err(e) => {
                     error = error.or(Some(e));
-                    Span::test_data() // FIXME: any better span to use here?
+                    Span::unknown() // FIXME: any better span to use here?
                 }
             };
 

crates/nu-protocol/tests/test_value.rs

@@ -3,9 +3,9 @@ use nu_protocol::{Span, Value};
 #[test]
 fn test_comparison_nothing() {
     let values = vec![
-        Value::int(1, Span::test_data()),
+        Value::test_int(1),
         Value::test_string("string"),
-        Value::float(1.0, Span::test_data()),
+        Value::test_float(1.0),
     ];
 
     let nothing = Value::Nothing {

crates/nu_plugin_query/src/query_json.rs

@@ -45,7 +45,7 @@ pub fn execute_json_query(
 
     if query_contains_modifiers(query_string) {
         let json_str = val.json();
-        Ok(Value::string(json_str, Span::test_data()))
+        Ok(Value::string(json_str, call.head))
     } else {
         Ok(convert_gjson_value_to_nu_value(&val, &call.head))
     }

crates/nu_plugin_query/src/query_web.rs

@@ -17,7 +17,7 @@ impl Selector {
             query: String::new(),
             as_html: false,
             attribute: String::new(),
-            as_table: Value::string("".to_string(), Span::test_data()),
+            as_table: Value::string("".to_string(), Span::unknown()),
             inspect: false,
         }
     }

crates/nu_plugin_query/src/query_xml.rs

@@ -61,20 +61,20 @@ pub fn execute_xpath_query(
                 sxd_xpath::Value::Nodeset(ns) => {
                     for n in ns.into_iter() {
                         cols.push(key.to_string());
-                        vals.push(Value::string(n.string_value(), Span::test_data()));
+                        vals.push(Value::string(n.string_value(), call.head));
                     }
                 }
                 sxd_xpath::Value::Boolean(b) => {
                     cols.push(key.to_string());
-                    vals.push(Value::boolean(b, Span::test_data()));
+                    vals.push(Value::boolean(b, call.head));
                 }
                 sxd_xpath::Value::Number(n) => {
                     cols.push(key.to_string());
-                    vals.push(Value::float(n, Span::test_data()));
+                    vals.push(Value::float(n, call.head));
                 }
                 sxd_xpath::Value::String(s) => {
                     cols.push(key.to_string());
-                    vals.push(Value::string(s, Span::test_data()));
+                    vals.push(Value::string(s, call.head));
                 }
             };
 
@@ -84,19 +84,19 @@ pub fn execute_xpath_query(
                 records.push(Value::Record {
                     cols: vec![k.to_string()],
                     vals: vec![v.clone()],
-                    span: Span::test_data(),
+                    span: call.head,
                 })
             }
 
             Ok(Value::List {
                 vals: records,
-                span: Span::test_data(),
+                span: call.head,
             })
         }
         Err(_) => Err(LabeledError {
             label: "xpath query error".to_string(),
             msg: "xpath query error".to_string(),
-            span: Some(Span::test_data()),
+            span: Some(call.head),
         }),
     }
 }
@@ -146,7 +146,7 @@ mod tests {
         let expected = Value::List {
             vals: vec![Value::Record {
                 cols: vec!["count(//a/*[posit...".to_string()],
-                vals: vec![Value::float(1.0, Span::test_data())],
+                vals: vec![Value::test_float(1.0)],
                 span: Span::test_data(),
             }],
             span: Span::test_data(),
@@ -177,7 +177,7 @@ mod tests {
         let expected = Value::List {
             vals: vec![Value::Record {
                 cols: vec!["count(//*[contain...".to_string()],
-                vals: vec![Value::float(1.0, Span::test_data())],
+                vals: vec![Value::test_float(1.0)],
                 span: Span::test_data(),
             }],
             span: Span::test_data(),

src/test_bins.rs

@@ -5,7 +5,7 @@ use nu_command::create_default_context;
 use nu_engine::eval_block;
 use nu_parser::parse;
 use nu_protocol::engine::{EngineState, Stack, StateWorkingSet};
-use nu_protocol::{CliError, PipelineData, Span, Value};
+use nu_protocol::{CliError, PipelineData, Value};
 // use nu_test_support::fs::in_directory;
 
 /// Echo's value of env keys from args
@@ -149,10 +149,7 @@ pub fn nu_repl() {
     let mut engine_state = create_default_context();
     let mut stack = Stack::new();
 
-    stack.add_env_var(
+    stack.add_env_var("PWD".to_string(), Value::test_string(cwd.to_string_lossy()));
-        "PWD".to_string(),
-        Value::string(cwd.to_string_lossy(), Span::test_data()),
-    );
 
     let mut last_output = String::new();