[4.x] Coverage not found in path

What Happened

Running multiple processes of pest in parallel create a crash with "ShouldNotHappen" for "vendor/pestphp/pest/.temp/coverage.php".
e.g. first process deletes the coverage.php from the second process

Using "--cache-directory=/tmp/foo" still writes coverage.php to "vendor/pestphp/pest/.temp/coverage.php".

Ideally, pest should not write into "vendor/*".

My recommendation:

• write coverage.php to "--cache-directory" if given
• if coverage.php cannot be written, stop with an error

How to Reproduce

e.g. use "--cache-directory=/tmp/foo" and make vendor/pestphp/pest/.temp/ readonly

Expectation:

• coverage.php gets written to /tmp/foo/coverage.php

Output:

   Pest\Exceptions\ShouldNotHappen 

  This should not happen - please create an new issue here: https://github.com/pestphp/pest.

  Issue: Coverage not found in path: xxx/vendor/pestphp/pest/.temp/coverage.php.
  PHP version: 8.4.1
  Operating system: Linux

  at vendor/pestphp/pest/src/Exceptions/ShouldNotHappen.php:37
     33▕      * Creates a new instance of should not happen without a specific exception.
     34▕      */
     35▕     public static function fromMessage(string $message): ShouldNotHappen
     36▕     {
  ➜  37▕         return new ShouldNotHappen(new Exception($message));
     38▕     }
     39▕ }
     40▕ 

      +1 vendor frames 
  1   vendor/pestphp/pest/src/Support/Coverage.php:88
      Pest\Exceptions\ShouldNotHappen::fromMessage()
      +1 vendor frames 

  2   vendor/pestphp/pest/src/Plugins/Coverage.php:147
      Pest\Support\Coverage::report()
      +1 vendor frames 

Sample Repository

No response

Pest Version

3.6.0

PHP Version

8.4.1

Operation System

Linux

Notes

No response

Start by reproducing the parallel-process failure with --cache-directory=/tmp/foo and a read-only vendor/pestphp/pest/.temp directory. Read src/Support/Coverage.php and src/Plugins/Coverage.php, which appear in the reported stack trace. Done means coverage.php is created in the configured cache directory and a clear error is reported when it cannot be written.