add some tests for stor create (#11194)

# Description

This is a PR to start adding a few tests to the `stor` commands. It
refactors the `stor create` command so it's easier to write tests.

# User-Facing Changes
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helps us keep track of breaking changes. -->

# Tests + Formatting
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crates/nu-command/src/stor/create.rs

@@ -62,6 +62,18 @@ impl Command for StorCreate {
         let columns: Option<Record> = call.get_flag(engine_state, stack, "columns")?;
         let db = Box::new(SQLiteDatabase::new(std::path::Path::new(MEMORY_DB), None));
 
+        process(table_name, span, &db, columns)?;
+        // dbg!(db.clone());
+        Ok(Value::custom_value(db, span).into_pipeline_data())
+    }
+}
+
+fn process(
+    table_name: Option<String>,
+    span: Span,
+    db: &SQLiteDatabase,
+    columns: Option<Record>,
+) -> Result<(), ShellError> {
     if table_name.is_none() {
         return Err(ShellError::MissingParameter {
             param_name: "requires at table name".into(),
@@ -129,14 +141,12 @@ impl Command for StorCreate {
             None => {
                 return Err(ShellError::MissingParameter {
                     param_name: "requires at least one column".into(),
-                        span: call.head,
+                    span,
                 });
             }
         };
     }
-        // dbg!(db.clone());
-        Ok(Value::custom_value(db, span).into_pipeline_data())
-    }
+    Ok(())
 }
 
 #[cfg(test)]
@@ -149,4 +159,80 @@ mod test {
 
         test_examples(StorCreate {})
     }
+
+    #[test]
+    fn test_process_with_valid_parameters() {
+        let table_name = Some("test_table".to_string());
+        let span = Span::unknown();
+        let db = Box::new(SQLiteDatabase::new(std::path::Path::new(MEMORY_DB), None));
+        let mut columns = Record::new();
+        columns.insert(
+            "int_column".to_string(),
+            Value::test_string("int".to_string()),
+        );
+
+        let result = process(table_name, span, &db, Some(columns));
+
+        assert!(result.is_ok());
+    }
+
+    #[test]
+    fn test_process_with_missing_table_name() {
+        let table_name = None;
+        let span = Span::unknown();
+        let db = Box::new(SQLiteDatabase::new(std::path::Path::new(MEMORY_DB), None));
+        let mut columns = Record::new();
+        columns.insert(
+            "int_column".to_string(),
+            Value::test_string("int".to_string()),
+        );
+
+        let result = process(table_name, span, &db, Some(columns));
+
+        assert!(result.is_err());
+        assert!(result
+            .unwrap_err()
+            .to_string()
+            .contains("requires at table name"));
+    }
+
+    #[test]
+    fn test_process_with_missing_columns() {
+        let table_name = Some("test_table".to_string());
+        let span = Span::unknown();
+        let db = Box::new(SQLiteDatabase::new(std::path::Path::new(MEMORY_DB), None));
+
+        let result = process(table_name, span, &db, None);
+
+        assert!(result.is_err());
+        assert!(result
+            .unwrap_err()
+            .to_string()
+            .contains("requires at least one column"));
+    }
+
+    #[test]
+    fn test_process_with_unsupported_column_data_type() {
+        let table_name = Some("test_table".to_string());
+        let span = Span::unknown();
+        let db = Box::new(SQLiteDatabase::new(std::path::Path::new(MEMORY_DB), None));
+        let mut columns = Record::new();
+        let column_datatype = "bogus_data_type".to_string();
+        columns.insert(
+            "column0".to_string(),
+            Value::test_string(column_datatype.clone()),
+        );
+
+        let result = process(table_name, span, &db, Some(columns));
+
+        assert!(result.is_err());
+
+        let expected_err = ShellError::UnsupportedInput {
+            msg: "unsupported column data type".into(),
+            input: format!("{:?}", column_datatype.clone()),
+            msg_span: Span::test_data(),
+            input_span: Span::test_data(),
+        };
+        assert_eq!(result.unwrap_err().to_string(), expected_err.to_string());
+    }
 }