Antoine Stevan 332f1192a6
stdlib: optimize test search and add better errors (#8626)
the first part of this PR comes from a request from @presidento in
#8525.
the second one is an improvement of the error support.

# Description
this PR
- computes `module_search_pattern` to only `ls` the selected modules =>
the goal is to save search time in the future with more tests
- gives better errors when
  - the `--path` is invalid
  - the `--module` does not exist
  - the search is too strict

### examples
```bash
>_ nu crates/nu-utils/standard_library/tests.nu --path does-not-exist
Error: 
  × directory_not_found
   ╭─[<commandline>:1:1]
 1 │ main --path does-not-exist
   ·             ───────┬──────
   ·                    ╰── no such directory
   ╰────
```

```bash
>_ nu crates/nu-utils/standard_library/tests.nu --module does-not-exist
Error: 
  × module_not_found
   ╭─[<commandline>:1:1]
 1 │ main --module does-not-exist
   ·               ───────┬──────
   ·                      ╰── no such module in /home/amtoine/.local/share/git/store/github.com/amtoine/nushell/crates/nu-utils/standard_library/
   ╰────
```

```bash
>_ nu crates/nu-utils/standard_library/tests.nu --command does_not_exist
Error: 
  × no test to run
```

instead of the previous

```bash
>_ nu crates/nu-utils/standard_library/tests.nu --path does-not-exist
Error: 
  × No matches found for /home/amtoine/.local/share/git/store/github.com/amtoine/nushell/does-not-exist/test_*.nu
    ╭─[/home/amtoine/.local/share/git/store/github.com/amtoine/nushell/crates/nu-utils/standard_library/tests.nu:32:1]
 32 │     let tests = (
 33 │         ls ($path | default $env.FILE_PWD | path join "test_*.nu")
    ·            ───────────────────────────┬───────────────────────────
    ·                                       ╰── Pattern, file or folder not found
 34 │         | each {|row| {file: $row.name name: ($row.name | path parse | get stem)}}
    ╰────
  help: no matches found
```

```bash
>_ nu crates/nu-utils/standard_library/tests.nu --module does-not-exist
Error: 
  × expected table from pipeline
    ╭─[/home/amtoine/.local/share/git/store/github.com/amtoine/nushell/crates/nu-utils/standard_library/tests.nu:59:1]
 59 │         $tests_to_run
 60 │         | group-by module
    ·           ────┬───
    ·               ╰── requires a table input
 61 │         | transpose name tests
    ╰────
```

```bash
>_ nu crates/nu-utils/standard_library/tests.nu --command does-not-exist
Error: 
  × expected table from pipeline
    ╭─[/home/amtoine/.local/share/git/store/github.com/amtoine/nushell/crates/nu-utils/standard_library/tests.nu:59:1]
 59 │         $tests_to_run
 60 │         | group-by module
    ·           ────┬───
    ·               ╰── requires a table input
 61 │         | transpose name tests
    ╰────
```

# User-Facing Changes
```
$nothing
```

# Tests + Formatting
```
$nothing
```

# After Submitting
```
$nothing
```
2023-03-26 08:09:26 -05:00
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