mirror of
https://github.com/nushell/nushell
synced 2024-12-28 14:03:09 +00:00
9bc4e6794d
Reasoning: Most missing math commands are implemented with #7258. The `meval` crate itself declares that it doesn't strive to stringent standards (https://docs.rs/meval/latest/meval/#related-projects). For example no particular special casing or transformations are performed to ensure numerical stability. It uses the same rust `std` library functions we use or have access to (and `f64`). While the command call syntax in nushell may be a bit more verbose, having a single source of truth and common commands is beneficial. Furthermore the `math` commands can themselves implement broadcasting over lists (or table columns). Closes #7073 Removed dependencies: - `meval` - `nom 1.2.4` (duplicate) User-Facing Changes: Scripts using `math eval` will break. We remove a further `eval` like behavior to get results through runtime evaluation (albeit limited in scope) Tests: - Updated tests that internally used `math eval`. - Removed one test that primarily used `math eval` to obtain a result from `str join`
131 lines
2.6 KiB
Rust
131 lines
2.6 KiB
Rust
use nu_test_support::{nu, pipeline};
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#[test]
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fn reduce_table_column() {
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let actual = nu!(
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cwd: ".", pipeline(
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r#"
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echo "[{month:2,total:30}, {month:3,total:10}, {month:4,total:3}, {month:5,total:60}]"
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| from json
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| get total
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| reduce -f 20 { |it, acc| $it + $acc ** 1.05}
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| into string -d 1
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"#
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)
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);
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assert_eq!(actual.out, "180.6");
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}
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#[test]
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fn reduce_table_column_with_path() {
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let actual = nu!(
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cwd: ".", pipeline(
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r#"
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[{month:2,total:30}, {month:3,total:10}, {month:4,total:3}, {month:5,total:60}]
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| reduce -f 20 { |it, acc| $it.total + $acc ** 1.05}
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| into string -d 1
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"#
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)
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);
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assert_eq!(actual.out, "180.6");
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}
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#[test]
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fn reduce_rows_example() {
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let actual = nu!(
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cwd: ".", pipeline(
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r#"
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[[a,b]; [1,2] [3,4]]
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| reduce -f 1.6 { |it, acc| $acc * ($it.a | into int) + ($it.b | into int) }
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"#
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)
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);
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assert_eq!(actual.out, "14.8");
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}
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#[test]
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fn reduce_numbered_example() {
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let actual = nu!(
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cwd: ".", pipeline(
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r#"
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echo one longest three bar
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| reduce -n { |it, acc| if ($it.item | str length) > ($acc.item | str length) {echo $it} else {echo $acc}}
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| get index
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"#
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)
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);
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assert_eq!(actual.out, "1");
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}
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#[test]
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fn reduce_numbered_integer_addition_example() {
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let actual = nu!(
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cwd: ".", pipeline(
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r#"
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echo [1 2 3 4]
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| reduce -n { |it, acc| $acc.item + $it.item }
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"#
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)
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);
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assert_eq!(actual.out, "10");
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}
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#[test]
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fn folding_with_tables() {
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let actual = nu!(
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cwd: ".", pipeline(
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r#"
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echo [10 20 30 40]
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| reduce -f [] { |it, acc|
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with-env [value $it] {
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echo $acc | append (10 * ($env.value | into int))
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}
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}
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| math sum
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"#
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)
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);
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assert_eq!(actual.out, "1000");
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}
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#[test]
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fn error_reduce_fold_type_mismatch() {
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let actual = nu!(
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cwd: ".", pipeline(
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r#"
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echo a b c | reduce -f 0 { |it, acc| $acc + $it }
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"#
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)
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);
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assert!(actual.err.contains("mismatch"));
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}
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#[test]
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fn error_reduce_empty() {
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let actual = nu!(
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cwd: ".", pipeline(
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r#"
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reduce { |it, acc| $acc + $it }
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"#
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)
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);
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assert!(actual.err.contains("needs input"));
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}
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#[test]
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fn uses_optional_index_argument() {
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let actual = nu!(
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cwd: ".", pipeline(
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r#"[18 19 20] | reduce -f 0 {|elem accum index| $accum + $index } | to nuon"#
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));
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assert_eq!(actual.out, "3");
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}
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