How Do You Verify Exception Handling in PHPUnit?

Verifying Exception Handling in PHPUnit

In unit testing, asserting that an exception is thrown validates the code's handling of exceptional situations. PHPUnit provides various ways to perform this assertion.

expectException

PHPUnit's expectException() method allows you to test whether a specific type of exception is thrown. You can specify the exception class in its argument. For instance:

<code class="php">$this->expectException(InvalidArgumentException::class);</code>

Alternatively, if you're using PHPUnit version 5.2 or lower, you can use setExpectedException().

<code class="php">$this->setExpectedException(InvalidArgumentException::class);</code>

Following the expectException() or setExpectedException() call, execute the code that should throw the exception. For example:

<code class="php">exampleMethod($anInvalidArgument);</code>

Documentation and In-Depth Coverage

Refer to PHPUnit's [expectException() documentation](https://phpunit.readthedocs.io/en/latest/assertions.html#expectingexception) for more information on this method.

The [PHPUnit author provides an article on best practices](https://www.phpunit.de/manual/current/en/fixtures.html#fixtures.exception) for testing exceptions. This article discusses the various approaches and provides guidance on effectively asserting exception handling.

The above is the detailed content of How Do You Verify Exception Handling in PHPUnit?. For more information, please follow other related articles on the PHP Chinese website!