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fcb8e36caa
# Description
Before this change `default` would dive into lists and replace `null`
elements with the default value.
Therefore there was no easy way to process `null|list<null|string>`
input and receive `list<null|string>`
(IOW to apply the default on the top level only).
However it's trivially easy to apply default values to list elements
with the `each` command:
```nushell
[null, "a", null] | each { default "b" }
```
So there's no need to have this behavior in `default` command.
# User-Facing Changes
* `default` no longer dives into lists to replace `null` elements with
the default value.
# Tests + Formatting
Added a couple of tests for the new (and old) behavior.
# After Submitting
* Update docs.
47 lines
1.1 KiB
Rust
47 lines
1.1 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":"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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