Writing Test Case

Test case is a PHP class containing test methods. See phpunit.de/manual for more information about PHPUnit tests.

Test Explorer (in the menu Test / Test Explorer) lists all the available tests suites by looking in phpunit.xml and phpunit.xml.dist configuration files in opened projects.

Note: phpunit.xml nor phpunit.xml.dist files in vendor/ subfolder are ignored.

By default, the test file name must be placed within tests subdirectory, its name suffixed with Test.php, and the contained test class name suffixed with Test, extending the PHPUnit framework TestCase class. All the test methods should be either prefixed with test (lowercased) or having a PHPDoc tag @test.

The Test Explorer has a delay a few seconds delay (3 seconds) before listing the updated test cases. It should show the following:

PHPUnit Test Case

Note: script files have to be saved to reflect changes in the Test Explorer window.

Default Test Case

The following is a default test case class with a single test case function. Usually saved under the tests/exampletest.php file:


class ExampleTest extends \PHPUnit\Framework\TestCase
    public function testFunction() {
        $this->assertEquals(2, 1 + 1);

Default phpunit.xml

A phpunit.xml file is required for the tests to be discovered. You can create a default phpunit.xml in the root of the project in the context menu under the project Add / New Item, choose category PHP, and the item template PHP Unit Configuration.

New PHP Unit Configuration

To create the file manually, create an empty file named phpunit.xml with the following default content:

    <testsuite name="My Test Suite">

The default configuration file defines single test suite "My Test Suite", which includes all the *Test.php files within tests directory.