add tests to str.nu

[savente93]

As requested by @amtoine 😋

[amtoine]

when i try to run the tests, i get the following errors

> use std testing run-tests; run-tests --path stdlib-candidate/ --module str
2023-10-02T18:57:56.996|INF|Running test_prepend in module str
2023-10-02T18:57:56.997|INF|Running test_append in module str
Error: nu::shell::external_command

  × External command failed
    ╭─[/home/amtoine/documents/repos/github.com/amtoine/nu_scripts/stdlib-candidate/ZUS8deD3N3.nu:29:1]
 29 │     use std assert error
 30 │     assert equal ("foo" | str prepend "/") "/foo"
    ·     ───┬──
    ·        ╰── command 'assert' was not found but it exists in module 'assert'; try importing it with `use`
 31 │     assert equal (["foo", "bar", "baz"] | str prepend "/") ["/foo", "/bar", "/baz"]
    ╰────
  help: No such file or directory (os error 2)

Error: nu::shell::external_command

  × External command failed
    ╭─[/home/amtoine/documents/repos/github.com/amtoine/nu_scripts/stdlib-candidate/y72rkBPeXL.nu:21:1]
 21 │     use std assert error
 22 │     assert equal ("foo" | str append "/") "foo/"
    ·     ───┬──
    ·        ╰── command 'assert' was not found but it exists in module 'assert'; try importing it with `use`
 23 │     assert equal (["foo", "bar", "baz"] | str append "/") ["foo/", "bar/", "baz/"]
    ╰────
  help: No such file or directory (os error 2)

Error:   × some tests did not pass (see complete errors below):
  │
  │     ⨯ str test_append
  │     ⨯ str test_prepend
  │

i think the two suggestions below should solve this 😋

[savente93]

Whoopsie, sorry bout that 😅

[amtoine]

Whoopsie, sorry bout that 😅

no worries, it works like a charm now 😉
thanks for the quick fix and adding the tests 🙏