PHPUnit assertThrows()

Exception testing assertions for PHPUnit.

Installation

You can install with composer if you're into that. Just make sure that your vendor/autoload.php file is included in your PHPUnit bootstrap file.

composer require --dev jchook/phpunit-assert-throws

Alternatively, simply download the one file and include it in your project.

Rationale

PHPUnit's current "best practices" for exception testing seem.. lackluster (docs).

Since I wanted more than the current expectException implementation, I made a trait to use on my test cases.

• Supports multiple exceptions per test
• Supports assertions called after the exception is thrown
• Clear usage examples
• Standard assert syntax
• Supports assertions for more than just message, code, and class
• Supports inverse assertion, assertNotThrows

Simple Example

Just to illustrate the spirit behind the syntax:

// Within your test case...
$this->assertThrows(MyException::class, function() use ($obj) {
	$obj->doSomethingBad();
});

Pretty neat?

---

Full Usage Example

Here is an actual TestCase class that shows a more comprehensive usage example:

<?php

declare(strict_types=1);

use PHPUnit\Framework\TestCase;
use Jchook\AssertThrows\AssertThrows;

// These are just for illustration
use MyNamespace\MyException;
use MyNamespace\MyObject;

final class MyTest extends TestCase
{
	use AssertThrows; // <--- adds the assertThrows method

	public function testMyObject()
	{
		$obj = new MyObject();

		// Test a basic exception is thrown
		$this->assertThrows(MyException::class, function() use ($obj) {
			$obj->doSomethingBad();
		});

		// Test custom aspects of a custom extension class
		$this->assertThrows(MyException::class,
			function() use ($obj) {
				$obj->doSomethingBad();
			},
			function($exception) {
				$this->assertEquals('Expected value', $exception->getCustomThing());
				$this->assertEquals(123, $exception->getCode());
			}
		);

		// Test that a specific exception is *NOT* thrown
		$this->assertNotThrows(MyException::class, function() use ($obj) {
			$obj->doSomethingGood();
		});
	}
}

?>

Notes

I realize that assertNotThrows() is grammatically... odd, but it's in keeping with the PHPUnit naming conventions, such as assertNotContains(). Additionally, the PHPUnit team's philosophy is that this inverse assertion is not even needed.

License

MIT