class ContrivedControllerTest

class ContrivedControllerTest extends UnitTestCase {
  
  /**
   * Data provider for testAdd().
   */
  public static function provideTestAdd() {
    return [
      [
        4,
        2,
        2,
      ],
    ];
  }
  
  /**
   * Test add.
   *
   * @dataProvider provideTestAdd
   */
  public function testAdd($expected, $first, $second) {
    $controller = $this->createMock(ContrivedController::class);
    $ref_add = new \ReflectionMethod($controller, 'add');
    $ref_add->setAccessible(TRUE);
    $this->assertEquals($expected, $ref_add->invokeArgs($controller, [
      $first,
      $second,
    ]));
  }
  
  /**
   * Data provider for testHandCount().
   */
  public static function provideTestHandCount() {
    return [
      [
        'I can count these on one hand.',
        0,
        0,
      ],
      [
        'I can count these on one hand.',
        1,
        0,
      ],
      [
        'I can count these on one hand.',
        0,
        1,
      ],
      [
        'I need two hands to count these.',
        5,
        5,
      ],
      [
        'That\'s just too many numbers to count.',
        5,
        6,
      ],
      [
        'That\'s just too many numbers to count.',
        6,
        5,
      ],
    ];
  }
  
  /**
   * Test hand count.
   *
   * @dataProvider provideTestHandCount
   */
  public function testHandCount($expected, $first, $second) {
    // Get a mock translation service.
    $mock_translation = $this->getStringTranslationStub();
    // Create a new controller with our mocked translation service.
    $controller = new ContrivedController($mock_translation);
    // Set up a reflection for handCount().
    $ref_hand_count = new \ReflectionMethod($controller, 'handCount');
    // Set handCount() to be public.
    $ref_hand_count->setAccessible(TRUE);
    // Check out whether handCount() meets our expectation.
    $message = $ref_hand_count->invokeArgs($controller, [
      $first,
      $second,
    ]);
    $this->assertEquals($expected, (string) $message);
  }
  
  /**
   * Data provider for testHandCountIsolated().
   */
  public static function providerTestHandCountIsolated() {
    $data = [];
    // Add one-hand data.
    foreach (range(0, 5) as $sum) {
      $data[] = [
        'I can count these on one hand.',
        $sum,
      ];
    }
    // Add two-hand data.
    foreach (range(6, 10) as $sum) {
      $data[] = [
        'I need two hands to count these.',
        $sum,
      ];
    }
    // Add too-many data.
    foreach (range(11, 15) as $sum) {
      $data[] = [
        'That\'s just too many numbers to count.',
        $sum,
      ];
    }
    return $data;
  }
  
  /**
   * Test hand count isolated.
   *
   * @dataProvider providerTestHandCountIsolated
   */
  public function testHandCountIsolated($expected, $sum) {
    // Mock a ContrivedController, using a mocked translation service.
    $controller = $this->getMockBuilder(ContrivedController::class)
      ->setConstructorArgs([
      $this->getStringTranslationStub(),
    ])
      ->onlyMethods([
      'add',
    ])
      ->getMock();
    // Mock add() so that it returns our $sum when it's called with (0,0).
    $controller->expects($this->once())
      ->method('add')
      ->with($this->equalTo(0), $this->equalTo(0))
      ->willReturn($sum);
    // Use reflection to make handCount() public.
    $ref_hand_count = new \ReflectionMethod($controller, 'handCount');
    // Invoke handCount().
    $message = (string) $ref_hand_count->invokeArgs($controller, [
      0,
      0,
    ]);
    // Assert our expectations.
    $this->assertEquals($expected, $message);
  }

}