fix: skip the frames of Pest by its own directory, not by the name of the checkout

[jfatr]

What happens

Backtrace::backtrace() decides which frames belong to Pest itself by looking for a substring in the path of each frame: pest/src when Pest runs its own test suite, and /pestphp/pest/src when it runs from vendor.

Clone this repository into a directory with any other name, pest5 for example, and run the unit suite:

FAILED  Tests\Unit\Support\Backtrace > it gets file name from called file
Failed asserting that two strings are identical.
-'/home/you/pest5/tests/Unit/Support/Backtrace.php'
+'/home/you/pest5/src/Support/Backtrace.php'

The path pest5/src/Support/Backtrace.php does not contain pest/src, so the first frame is not skipped and Backtrace::file() returns its own file instead of the file of the caller. The same happens for any checkout name, a fork, a worktree, or a CI job that clones into a directory named after the branch.

The fix

Compare each frame against the directory that holds Backtrace.php instead of a name:

if (str_starts_with($trace['file'], dirname(__DIR__).DIRECTORY_SEPARATOR)) {
    continue;
}

dirname(__DIR__) is the src directory of Pest in every layout: the checkout of this repository, whatever it is called, and vendor/pestphp/pest/src in a project that installs Pest. One check replaces the two substring checks.

$GLOBALS['__PEST_INTERNAL_TEST_SUITE'] existed to enable the first substring check during the internal suite. Nothing reads it now, so tests/Pest.php no longer sets it.

Verification

• tests/Unit/Support/Backtrace.php passes from a checkout named pest5.
• pest --exclude-group=integration: 1582 passed, 0 failed.
• rector, pint, phpstan and type coverage at 100 % pass.

🤖 Generated with Claude Code