Assertions
Overview
By now you've caught a glimpse of some available assertions. They are the ones that actually perform the checks to ensure that things are going as planned.
Remember, the $this variable inside the given
closure in tests is always bound to a Test Case class. Therefore
assertions are methods of the $this variable.
1it('asserts true is true', function () {2 $this->assertTrue(true);3});Available Assertions
For the full list of assertions, please refer to PHPUnit Assertions documentation.
assertTrue()
The assertTrue asserts the given value is truthy.
1$this->assertTrue(true);assertFalse()
The assertFalse asserts the given value is falsy.
1$this->assertFalse(false);assertCount()
The assertCount asserts the given iterable to contain the same number of items.
1$array = [1, 2, 3, 4];2 3$this->assertCount(4, $array);assertEquals()
The assertEquals asserts the given values are equal.
1$array = [1, 2, 3, 4];2 3$this->assertEquals([1, 2, 3, 4], $array);assertEmpty()
The assertEmpty asserts the given iterable is empty.
1$array = [];2 3$this->assertEmpty($array);assertStringContainsString()
The assertStringContainsString asserts the given string exists.
1$this->assertStringContainsString('Star', 'Star Wars');Next section: Expectations →