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https://github.com/nushell/nushell
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33a7bc405f
# Description This PR refactors `drop columns` and fixes issues #10902 and #6846. Tables with "holes" are now handled consistently, although still somewhat awkwardly. That is, the columns in the first row are used to determine which columns to drop, meaning that the columns displayed all the way to the right by `table` may not be the columns actually being dropped. For example, `[{a: 1}, {b: 2}] | drop column` will drop column `a` instead of `b`. Before, this would give a list of empty records. # User-Facing Changes `drop columns` can now take records as input.
137 lines
2.6 KiB
Rust
137 lines
2.6 KiB
Rust
use nu_test_support::{nu, pipeline};
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#[test]
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fn columns() {
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let actual = nu!(pipeline(
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"
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echo [
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[arepas, color];
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[3, white]
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[8, yellow]
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[4, white]
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] | drop column | columns | length
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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 drop_columns_positive_value() {
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let actual = nu!("echo [[a, b];[1,2]] | drop column -1");
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assert!(actual.err.contains("use a positive value"));
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}
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#[test]
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fn more_columns_than_table_has() {
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let actual = nu!(pipeline(
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"
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echo [
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[arepas, color];
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[3, white]
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[8, yellow]
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[4, white]
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] | drop column 3 | columns | is-empty
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"
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));
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assert_eq!(actual.out, "true");
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}
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#[test]
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fn rows() {
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let actual = nu!(pipeline(
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"
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echo [
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[arepas];
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[3]
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[8]
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[4]
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]
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| drop 2
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| get arepas
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| math sum
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"
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));
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assert_eq!(actual.out, "3");
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}
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#[test]
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fn more_rows_than_table_has() {
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let actual = nu!("[date] | drop 50 | length");
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assert_eq!(actual.out, "0");
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}
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#[test]
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fn nth_range_inclusive() {
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let actual = nu!("echo 10..15 | drop nth (2..3) | to json --raw");
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assert_eq!(actual.out, "[10,11,14,15]");
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}
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#[test]
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fn nth_range_exclusive() {
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let actual = nu!("echo 10..15 | drop nth (1..<3) | to json --raw");
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assert_eq!(actual.out, "[10,13,14,15]");
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}
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#[test]
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fn nth_missing_first_argument() {
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let actual = nu!("echo 10..15 | drop nth \"\"");
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assert!(actual.err.contains("int or range"));
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}
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#[test]
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fn fail_on_non_iterator() {
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let actual = nu!("1 | drop 50");
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assert!(actual.err.contains("command doesn't support"));
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}
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#[test]
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fn disjoint_columns_first_row_becomes_empty() {
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let actual = nu!(pipeline(
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"
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[{a: 1}, {b: 2, c: 3}]
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| drop column
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| columns
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| to nuon
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"
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));
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assert_eq!(actual.out, "[b, c]");
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}
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#[test]
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fn disjoint_columns() {
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let actual = nu!(pipeline(
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"
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[{a: 1, b: 2}, {c: 3}]
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| drop column
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| columns
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| to nuon
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"
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));
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assert_eq!(actual.out, "[a, c]");
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}
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#[test]
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fn record() {
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let actual = nu!("{a: 1, b: 2} | drop column | to nuon");
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assert_eq!(actual.out, "{a: 1}");
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}
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#[test]
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fn more_columns_than_record_has() {
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let actual = nu!("{a: 1, b: 2} | drop column 3 | to nuon");
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assert_eq!(actual.out, "{}");
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}
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