# `Bylaw.Credo.Check.Testing.NoTestsInTestDir`
[🔗](https://github.com/ryanzidago/bylaw/blob/v0.1.0-alpha.1/lib/bylaw/credo/check/testing/no_tests_in_test_dir.ex#L1)

## Basics

> #### This check is disabled by default. {: .neutral}
>
> [Learn how to enable it](`e:credo:config_file.html#checks`) via `.credo.exs`.

This check has a base priority of `higher` and works with any version of Elixir.

## Explanation

Keep test files colocated with the implementation they cover instead of
storing them under a separate top-level `test/` directory.

## Examples

Avoid:

      test/bylaw/example_test.exs

Prefer:

      lib/bylaw/example.ex
      lib/bylaw/example_test.exs

## Notes

A separate test tree makes it harder to find the tests for a module and
easier to move implementation without noticing stale or missing coverage.

Colocation keeps behavior and coverage near each other, which makes
focused changes and reviews cheaper.

This check uses static AST analysis, so it favors clear source-level patterns over runtime behavior.

## Options

This check has no check-specific options. Configure it with an empty option list.

## Usage

Add this check to Credo's `checks:` list in `.credo.exs`:

```elixir
%{
  configs: [
    %{
      name: "default",
      checks: [
        {Bylaw.Credo.Check.Testing.NoTestsInTestDir, []}
      ]
    }
  ]
}
```

## Check-Specific Parameters

*There are no specific parameters for this check.*

## General Parameters

Like with all checks, [general params](`e:credo:check_params.html`) can be applied.

Parameters can be configured via the [`.credo.exs` config file](`e:credo:config_file.html`).

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*Consult [api-reference.md](api-reference.md) for complete listing*