common\tests\unit\models\LoginFormTest::testLoginCorrect PHP Method

    public function testLoginCorrect()
    {
        $model = new LoginForm(['username' => 'bayer.hudson', 'password' => 'password_0']);
        expect('model should login user', $model->login())->true();
        expect('error message should not be set', $model->errors)->hasntKey('password');
        expect('user should be logged in', Yii::$app->user->isGuest)->false();
    }