How to catch PHP Warning in PHPUnit

Question

I am writing test cases and here is a question I have.

So say I am testing a simple function someClass::loadValue($value)

The normal test case

Answer 1

Using Netsilik/BaseTestCase (MIT License) you can test directly for triggered Errors/Warnings, without converting them to Exceptions:

composer require netsilik/base-test-case

Testing for an E_USER_NOTICE:

_convertNoticesToExceptions  = false;
        $this->_convertWarningsToExceptions = false;
        $this->_convertErrorsToExceptions   = true;
    }

    public function test_whenNoticeTriggered_weCanTestForIt()
    {
        $foo = new Foo();
        $foo->bar();

        self::assertErrorTriggered(E_USER_NOTICE, 'The warning string');
    }
}

Hope this helps someone in the future.