nushell/crates/nu-std/tests/test_std.nu
Antoine Stevan ba6d8ad261
add std repeat command to replace "foo" * 3 (#10339)
related to
- https://github.com/nushell/nushell/issues/10233
- https://github.com/nushell/nushell/pull/10293
- https://github.com/nushell/nushell/pull/10292

inspired by @kubouch 

# Description
this PR adds a `repeat` command to the standard library

# User-Facing Changes
a new `repeat` command in `std`
```nushell
repeat anything a bunch of times, yielding a list of *n* times the input

# Examples
    repeat a string
    > "foo" | std repeat 3 | str join
    "foofoofoo"

Usage:
  > repeat <n>

Flags:
  -h, --help - Display the help message for this command

Parameters:
  n <int>: the number of repetitions, must be positive

Input/output types:
  ╭───┬───────┬───────────╮
  │ # │ input │  output   │
  ├───┼───────┼───────────┤
  │ 0 │ any   │ list<any> │
  ╰───┴───────┴───────────╯
```

# Tests + Formatting
a new test called `repeat_things` in `test_std.nu`

# After Submitting
2023-09-12 21:59:31 +02:00

58 lines
1.3 KiB
Plaintext

use std
#[test]
def path_add [] {
use std assert
let path_name = if "PATH" in $env { "PATH" } else { "Path" }
with-env [$path_name []] {
def get_path [] { $env | get $path_name }
assert equal (get_path) []
std path add "/foo/"
assert equal (get_path) ["/foo/"]
std path add "/bar/" "/baz/"
assert equal (get_path) ["/bar/", "/baz/", "/foo/"]
load-env {$path_name: []}
std path add "foo"
std path add "bar" "baz" --append
assert equal (get_path) ["foo", "bar", "baz"]
assert equal (std path add "fooooo" --ret) ["fooooo", "foo", "bar", "baz"]
assert equal (get_path) ["fooooo", "foo", "bar", "baz"]
load-env {$path_name: []}
let target_paths = {
linux: "foo",
windows: "bar",
macos: "baz",
android: "quux",
}
std path add $target_paths
assert equal (get_path) [($target_paths | get $nu.os-info.name)]
}
}
#[test]
def banner [] {
std assert ((std banner | lines | length) == 15)
}
#[test]
def repeat_things [] {
std assert error { "foo" | std repeat -1 }
for x in ["foo", [1 2], {a: 1}] {
std assert equal ($x | std repeat 0) []
std assert equal ($x | std repeat 1) [$x]
std assert equal ($x | std repeat 2) [$x $x]
}
}