Laravel 框架类在 PHPUnit 数据提供程序中不可用

正如this answer中所暗示的，这似乎与PHPUnit在任何测试用例中调用任何数据提供程序和setUp()方法的顺序有关.

PHPUnit will call the data provider methods before running any tests. Before each test it will also call the setUp() method in the test case. Laravel hooks into the setUp() method to call $this->createApplication() which will add the controller classes to the 'include path' so that they can be autoloaded correctly.

Since the data provider methods are run before this happens then any references to controller classes inside a data provider fail. It's possible work around this by modifying the test class to something like this:

class MyControllerTest extends TestCase {

    public function __construct($name = null, array $data = array(), $dataName = '') {
        parent::__construct($name, $data, $dataName);

        $this->createApplication();
    }

    public function myDataProvider() {
        return [
            [ MyController::MAX_FILE_SIZE ]
        ];
    }

    /**
     * @dataProvider myDataProvider
     */
    public function testMyController($a) {
        // Just an example
        $this->assertTrue(1 == 1);
    }
}

This will call createApplication() before the data provider methods are run, and so there is a valid application instance that will allow the appropriate classes to be autoloaded correctly.

This seems to work, but I'm not sure if it's the best solution, or if it is likely to cause any issues (although I can't think of any reasons why it should).