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Add 'every' command to select (or skip) every nth row (#1992)

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* Add 'every' command

* Add --skip option to 'every' command

This option skips instead of selects every nth row

* Fix descriptions for 'every' command

* Add docummentation for 'every' command

* Check actual filenames in 'every' command tests
This commit is contained in:
Jakub Žádník
2020-06-16 22:58:41 +03:00
committed by GitHub
parent eb1ada6115
commit 3d63901b3b
6 changed files with 400 additions and 0 deletions
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245
crates/nu-cli/tests/commands/every.rs Normal file
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@ -0,0 +1,245 @@
use nu_test_support::fs::Stub::EmptyFile;
use nu_test_support::playground::Playground;
use nu_test_support::{nu, pipeline};
#[test]
fn gets_all_rows_by_every_zero() {
Playground::setup("every_test_1", |dirs, sandbox| {
sandbox.with_files(vec![
EmptyFile("los.txt"),
EmptyFile("tres.txt"),
EmptyFile("amigos.txt"),
EmptyFile("arepas.clu"),
]);
let actual = nu!(
cwd: dirs.test(), pipeline(
r#"
ls
| get name
| every 0
"#
));
let expected = nu!(
cwd: dirs.test(), pipeline(
r#"
echo [ amigos.txt arepas.clu los.txt tres.txt ]
"#
));
assert_eq!(actual.out, expected.out);
})
}
#[test]
fn gets_no_rows_by_every_skip_zero() {
Playground::setup("every_test_2", |dirs, sandbox| {
sandbox.with_files(vec![
EmptyFile("los.txt"),
EmptyFile("tres.txt"),
EmptyFile("amigos.txt"),
EmptyFile("arepas.clu"),
]);
let actual = nu!(
cwd: dirs.test(), pipeline(
r#"
ls
| get name
| every 0 --skip
"#
));
let expected = nu!(
cwd: dirs.test(), pipeline(
r#"
echo [ ]
"#
));
assert_eq!(actual.out, expected.out);
})
}
#[test]
fn gets_all_rows_by_every_one() {
Playground::setup("every_test_3", |dirs, sandbox| {
sandbox.with_files(vec![
EmptyFile("los.txt"),
EmptyFile("tres.txt"),
EmptyFile("amigos.txt"),
EmptyFile("arepas.clu"),
]);
let actual = nu!(
cwd: dirs.test(), pipeline(
r#"
ls
| get name
| every 1
"#
));
let expected = nu!(
cwd: dirs.test(), pipeline(
r#"
echo [ amigos.txt arepas.clu los.txt tres.txt ]
"#
));
assert_eq!(actual.out, expected.out);
})
}
#[test]
fn gets_no_rows_by_every_skip_one() {
Playground::setup("every_test_4", |dirs, sandbox| {
sandbox.with_files(vec![
EmptyFile("los.txt"),
EmptyFile("tres.txt"),
EmptyFile("amigos.txt"),
EmptyFile("arepas.clu"),
]);
let actual = nu!(
cwd: dirs.test(), pipeline(
r#"
ls
| get name
| every 1 --skip
"#
));
let expected = nu!(
cwd: dirs.test(), pipeline(
r#"
echo [ ]
"#
));
assert_eq!(actual.out, expected.out);
})
}
#[test]
fn gets_first_row_by_every_too_much() {
Playground::setup("every_test_5", |dirs, sandbox| {
sandbox.with_files(vec![
EmptyFile("los.txt"),
EmptyFile("tres.txt"),
EmptyFile("amigos.txt"),
EmptyFile("arepas.clu"),
]);
let actual = nu!(
cwd: dirs.test(), pipeline(
r#"
ls
| get name
| every 999
"#
));
let expected = nu!(
cwd: dirs.test(), pipeline(
r#"
echo [ amigos.txt ]
"#
));
assert_eq!(actual.out, expected.out);
})
}
#[test]
fn gets_all_rows_except_first_by_every_skip_too_much() {
Playground::setup("every_test_6", |dirs, sandbox| {
sandbox.with_files(vec![
EmptyFile("los.txt"),
EmptyFile("tres.txt"),
EmptyFile("amigos.txt"),
EmptyFile("arepas.clu"),
]);
let actual = nu!(
cwd: dirs.test(), pipeline(
r#"
ls
| get name
| every 999 --skip
"#
));
let expected = nu!(
cwd: dirs.test(), pipeline(
r#"
echo [ arepas.clu los.txt tres.txt ]
"#
));
assert_eq!(actual.out, expected.out);
})
}
#[test]
fn gets_every_third_row() {
Playground::setup("every_test_7", |dirs, sandbox| {
sandbox.with_files(vec![
EmptyFile("los.txt"),
EmptyFile("tres.txt"),
EmptyFile("quatro.txt"),
EmptyFile("amigos.txt"),
EmptyFile("arepas.clu"),
]);
let actual = nu!(
cwd: dirs.test(), pipeline(
r#"
ls
| get name
| every 3
"#
));
let expected = nu!(
cwd: dirs.test(), pipeline(
r#"
echo [ amigos.txt quatro.txt ]
"#
));
assert_eq!(actual.out, expected.out);
})
}
#[test]
fn skips_every_third_row() {
Playground::setup("every_test_8", |dirs, sandbox| {
sandbox.with_files(vec![
EmptyFile("los.txt"),
EmptyFile("tres.txt"),
EmptyFile("quatro.txt"),
EmptyFile("amigos.txt"),
EmptyFile("arepas.clu"),
]);
let actual = nu!(
cwd: dirs.test(), pipeline(
r#"
ls
| get name
| every 3 --skip
"#
));
let expected = nu!(
cwd: dirs.test(), pipeline(
r#"
echo [ arepas.clu los.txt tres.txt ]
"#
));
assert_eq!(actual.out, expected.out);
})
}

1
crates/nu-cli/tests/commands/mod.rs
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@ -10,6 +10,7 @@ mod default;
mod drop;
mod each;
mod enter;
mod every;
mod first;
mod format;
mod get;