nushell/crates/nu-command/tests/commands/drop.rs

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use nu_test_support::{nu, pipeline};
#[test]
fn columns() {
let actual = nu!(pipeline(
"
echo [
[arepas, color];
[3, white]
[8, yellow]
[4, white]
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] | drop column | columns | length
"
));
assert_eq!(actual.out, "1");
}
#[test]
fn drop_columns_positive_value() {
let actual = nu!("echo [[a, b];[1,2]] | drop column -1");
assert!(actual.err.contains("use a positive value"));
}
#[test]
fn more_columns_than_table_has() {
let actual = nu!(pipeline(
"
echo [
[arepas, color];
[3, white]
[8, yellow]
[4, white]
] | drop column 3 | columns | is-empty
"
));
assert_eq!(actual.out, "true");
}
#[test]
fn rows() {
let actual = nu!(pipeline(
"
echo [
[arepas];
[3]
[8]
[4]
]
| drop 2
| get arepas
| math sum
"
));
assert_eq!(actual.out, "3");
}
#[test]
fn more_rows_than_table_has() {
let actual = nu!("[date] | drop 50 | length");
assert_eq!(actual.out, "0");
}
#[test]
fn nth_range_inclusive() {
let actual = nu!("echo 10..15 | drop nth (2..3) | to json --raw");
assert_eq!(actual.out, "[10,11,14,15]");
}
#[test]
fn nth_range_exclusive() {
let actual = nu!("echo 10..15 | drop nth (1..<3) | to json --raw");
assert_eq!(actual.out, "[10,13,14,15]");
}
#[test]
fn nth_missing_first_argument() {
let actual = nu!("echo 10..15 | drop nth \"\"");
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assert!(actual.err.contains("int or range"));
}
#[test]
fn fail_on_non_iterator() {
let actual = nu!("1 | drop 50");
assert!(actual.err.contains("only_supports_this_input_type"));
}