Bug: FeatureTest dies when throws RedirectException/cached page

[kenjis]

Describe the bug
CodeIgniter::run() may call exit() and if you hit the point, FeatureTest (phpunit) dies.

CodeIgniter4/system/CodeIgniter.php

Line 328 in 18d0c3c

$this->callExit(EXIT_SUCCESS);

CodeIgniter4/system/CodeIgniter.php

Line 345 in 18d0c3c

$this->callExit(EXIT_SUCCESS);

CodeIgniter4/system/CodeIgniter.php

Lines 1139 to 1144 in 18d0c3c

	protected function callExit($code)
	{
	// @codeCoverageIgnoreStart
	exit($code);
	// @codeCoverageIgnoreEnd
	}

CodeIgniter 4 version
develop branch

Affected module(s)
CodeIgniter.php, Tests

Expected behavior, and steps to reproduce if appropriate
phpunit does not die.

Context

• OS: [macOS 10.15.7]
• Web server [n/a]
• PHP version [7.4.15]

[MGatner]

The method description says

Made into a separate method so that it can be mocked during testing without actually stopping script execution.

Is the issue that this mocking is not happening by default for Feature Test Cases?

[kenjis]

@MGatner Yes.

See

• https://github.com/kenjis/ci4-4288/blob/main/tests/feature/RedirectExceptionTest.php
• https://github.com/kenjis/ci4-4288/blob/main/app/Controllers/Test.php

$ composer test
> phpunit
PHPUnit 9.5.2 by Sebastian Bergmann and contributors.

.. (phpunit died)

[MGatner]

We have system/Test/Mock/MockCodeIgniter.php but I see it isn't being used. It isn't immediately apparent to me how we would inject that during CIUnitTest but I believe that is the solution.

[kenjis]

@MGatner Thank you for the info.
I will look into it.

[kenjis]

See #4315