Hướng dẫn assert no exception phpunit

PHP 7.4 and PHPUnit 9

Using the PHPUnit homepage example [//phpunit.de/getting-started/phpunit-9.html]:

private function ensureIsValidEmail[string $email]: void
{
    if [!filter_var[$email, FILTER_VALIDATE_EMAIL]] {
        throw new InvalidArgumentException[
            sprintf[
                '"%s" is not a valid email address',
                $email
            ]
        ];
    }
}

The homepage also shows us how to test the exception is thrown using the expectException[] method:

public function testCannotBeCreatedFromInvalidEmailAddress[]: void
{
    $this->expectException[InvalidArgumentException::class];

    Email::fromString['invalid'];
}

That's great. But what if I want to test the exception is not thrown given valid input ?

Looking at the docs [//phpunit.readthedocs.io/en/9.3/writing-tests-for-phpunit.html#testing-exceptions] there seems to be no mention of an inverse method to expectException[] ?

How should I approach this ?

EDIT TO ADD:

Just to make it perfectly clear, I'm looking to test an Email::fromString['']; scenario, i.e. that the exception is not thrown.

asked Sep 1, 2020 at 20:35

Little CodeLittle Code

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1

If an uncaught or unexpected exception is thrown, the test will fail. You don't have to do anything special, just run the code being tested. If there are no other assertions in the test method, you'll also have to do $this->expectNotToPerformAssertions[]; or you'll get a warning that the test doesn't perform any assertions.

public function testCannotBeCreatedFromInvalidEmailAddress[]: void
{
    $this->expectNotToPerformAssertions[];
    Email::fromString['invalid']; // If this throws an exception, the test will fail.
}

answered Sep 1, 2020 at 20:39

Alex HowanskyAlex Howansky

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2

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