nushell/crates/nu-utils/standard_library/test_dirs.nu
Máté FARKAS d74a260883
stdlib: add test discovery, extract test files (#8443)
# Description

Was original asked here:
https://github.com/nushell/nushell/pull/8405#issuecomment-1465062652
Make it easier to extend standard library with submodules.
(For a new submodule called `xx.nu` the tests can be written in
`test_xx.nu`).
Test discovery is implemented.

# User-Facing Changes

There are no user-facing changes.

# Tests + Formatting

Tests are updated.
There is no `nufmt` now.

---------

Co-authored-by: Mate Farkas <Mate.Farkas@oneidentity.com>
2023-03-16 13:23:29 -05:00

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use std.nu
def "myassert" [
predicate: bool
msg?:string = "..."
--verbose = false (-v) # enable to see successful tests
] {
if not $predicate {
let span = (metadata $predicate).span
error make {msg: $"Assertion failed checking ($msg)",
label: {text: "Condition not true" start: $span.start end: $span.end}}
} else {
if $verbose {
echo $"check succeeded: ($msg)"
}
}
}
export def test_dirs_command [] {
# need some directories to play with
let base_path = (($nu.temp-path) | path join $"test_dirs_(random uuid)" | path expand )
let path_a = ($base_path | path join "a")
let path_b = ($base_path | path join "b")
try {
mkdir $base_path $path_a $path_b
cd $base_path
use dirs.nu
myassert (1 == ($env.DIRS_LIST | length)) "list is just pwd after initialization"
myassert ($base_path == $env.DIRS_LIST.0) "list is just pwd after initialization"
dirs next
myassert ($base_path == $env.DIRS_LIST.0) "next wraps at end of list"
dirs prev
myassert ($base_path == $env.DIRS_LIST.0) "prev wraps at top of list"
dirs add $path_b $path_a
myassert ($path_b == $env.PWD) "add changes PWD to first added dir"
myassert (3 == ($env.DIRS_LIST | length)) "add in fact adds to list"
myassert ($path_a == $env.DIRS_LIST.2) "add in fact adds to list"
dirs next 2
myassert ($base_path == $env.PWD) "next wraps at end of list"
dirs prev 1
myassert ($path_a == $env.PWD) "prev wraps at start of list"
dirs drop
myassert (2 == ($env.DIRS_LIST | length)) "drop removes from list"
myassert ($base_path == $env.PWD) "drop changes PWD to next in list (after dropped element)"
myassert ((dirs show) == [[active path]; [true $base_path] [false $path_b]]) "show table contains expected information"
} catch { |error|
$error | debug
true
}
cd $base_path
cd ..
rm -r $base_path
}