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https://github.com/nushell/nushell.git
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029f3843d3
# Description Adds a new `--empty/-e` flag to the `default` command. # User-Facing Changes Before: ```nushell $env.FOO = "" $env.FOO = $env.FOO? | default bar $env.FOO # => Empty string ``` After: ```nushell $env.FOO = "" $env.FOO = $env.FOO? | default -e bar $env.FOO # => bar ``` * Uses `val.is_empty`, which means that empty lists and records are also replaced * Empty values in tables (with a column specifier) are also replaced. # Tests + Formatting 7 tests added and 1 updated + 1 new example - 🟢 `toolkit fmt` - 🟢 `toolkit clippy` - 🟢 `toolkit test` - 🟢 `toolkit test stdlib` # After Submitting N/A
115 lines
2.8 KiB
Rust
115 lines
2.8 KiB
Rust
use nu_test_support::{nu, pipeline};
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#[test]
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fn adds_row_data_if_column_missing() {
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let sample = r#"
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{
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"amigos": [
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{"name": "Yehuda"},
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{"name": "JT", "rusty_luck": 0},
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{"name": "Andres", "rusty_luck": 0},
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{"name": "Michael", "rusty_luck": []},
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{"name": "Darren", "rusty_luck": {}},
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{"name": "Stefan", "rusty_luck": ""},
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{"name": "GorbyPuff"}
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]
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}
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"#;
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let actual = nu!(pipeline(&format!(
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"
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{sample}
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| get amigos
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| default 1 rusty_luck
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| where rusty_luck == 1
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| length
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"
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)));
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assert_eq!(actual.out, "2");
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}
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#[test]
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fn default_after_empty_filter() {
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let actual = nu!("[a b] | where $it == 'c' | get -i 0 | default 'd'");
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assert_eq!(actual.out, "d");
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}
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#[test]
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fn keeps_nulls_in_lists() {
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let actual = nu!(r#"[null, 2, 3] | default [] | to json -r"#);
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assert_eq!(actual.out, "[null,2,3]");
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}
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#[test]
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fn replaces_null() {
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let actual = nu!(r#"null | default 1"#);
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assert_eq!(actual.out, "1");
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}
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#[test]
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fn adds_row_data_if_column_missing_or_empty() {
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let sample = r#"
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{
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"amigos": [
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{"name": "Yehuda"},
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{"name": "JT", "rusty_luck": 0},
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{"name": "Andres", "rusty_luck": 0},
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{"name": "Michael", "rusty_luck": []},
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{"name": "Darren", "rusty_luck": {}},
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{"name": "Stefan", "rusty_luck": ""},
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{"name": "GorbyPuff"}
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]
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}
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"#;
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let actual = nu!(pipeline(&format!(
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"
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{sample}
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| get amigos
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| default -e 1 rusty_luck
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| where rusty_luck == 1
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| length
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"
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)));
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assert_eq!(actual.out, "5");
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}
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#[test]
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fn replace_empty_string() {
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let actual = nu!(r#"'' | default -e foo"#);
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assert_eq!(actual.out, "foo");
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}
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#[test]
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fn do_not_replace_empty_string() {
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let actual = nu!(r#"'' | default 1"#);
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assert_eq!(actual.out, "");
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}
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#[test]
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fn replace_empty_list() {
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let actual = nu!(r#"[] | default -e foo"#);
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assert_eq!(actual.out, "foo");
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}
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#[test]
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fn do_not_replace_empty_list() {
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let actual = nu!(r#"[] | default 1 | length"#);
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assert_eq!(actual.out, "0");
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}
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#[test]
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fn replace_empty_record() {
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let actual = nu!(r#"{} | default -e foo"#);
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assert_eq!(actual.out, "foo");
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}
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#[test]
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fn do_not_replace_empty_record() {
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let actual = nu!(r#"{} | default {a:5} | columns | length"#);
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assert_eq!(actual.out, "0");
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}
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