class RectangleTest

class RectangleTest extends TestCase {
    
    /**
     * Tests wrong rectangle width.
     *
     * @covers ::rotate
     */
    public function testWrongWidth() {
        $this->expectException(\InvalidArgumentException::class);
        $rect = new Rectangle(-40, 20);
    }
    
    /**
     * Tests wrong rectangle height.
     *
     * @covers ::rotate
     */
    public function testWrongHeight() {
        $this->expectException(\InvalidArgumentException::class);
        $rect = new Rectangle(40, 0);
    }
    
    /**
     * Tests getting rectangle dimensions after a rotation operation.
     *
     * @param int $width
     *   The width of the rectangle.
     * @param int $height
     *   The height of the rectangle.
     * @param float $angle
     *   The angle for rotation.
     * @param int $exp_width
     *   The expected width of the rotated rectangle.
     * @param int $exp_height
     *   The expected height of the rotated rectangle.
     *
     * @covers ::rotate
     * @covers ::getBoundingWidth
     * @covers ::getBoundingHeight
     *
     * @dataProvider providerPhp55RotateDimensions
     */
    public function testRotateDimensions($width, $height, $angle, $exp_width, $exp_height) {
        $rect = new Rectangle($width, $height);
        $rect->rotate($angle);
        $this->assertEquals($exp_width, $rect->getBoundingWidth());
        $this->assertEquals($exp_height, $rect->getBoundingHeight());
    }
    
    /**
     * Provides data for image dimension rotation tests.
     *
     * This dataset sample was generated by running on PHP 5.5 the function below
     * - first, for all integer rotation angles (-360 to 360) on a rectangle
     *   40x20;
     * - second, for 500 random float rotation angle in the range -360 to 360 on
     *   a rectangle 40x20;
     * - third, on 1000 rectangles of random WxH rotated to a random float angle
     *   in the range -360 to 360
     * - fourth, on 2000 rectangles of random WxH rotated to a random integer
     *   angle multiple of 30 degrees in the range -360 to 360 (which is the most
     *   tricky case).
     * Using the GD toolkit operations gives us true data coming from the GD
     * library that can be used to match against the Rectangle class under test.
     * @code
     *   protected function rotateResults($width, $height, $angle, &$new_width, &$new_height) {
     *     $image = \Drupal::service('image.factory')->get(NULL, 'gd');
     *     $image->createNew($width, $height);
     *     $old_res = $image->getToolkit()->getResource();
     *     $image->rotate($angle);
     *     $new_width = $image->getWidth();
     *     $new_height = $image->getHeight();
     *     if (is_resource($old_res)) {
     *       imagedestroy($old_res);
     *     }
     *   }
     * @endcode
     *
     * @return array[]
     *   A simple array of simple arrays, each having the following elements:
     *   - original image width
     *   - original image height
     *   - rotation angle in degrees
     *   - expected image width after rotation
     *   - expected image height after rotation
     *
     * @see testRotateDimensions()
     */
    public function providerPhp55RotateDimensions() {
        // The dataset is stored in a .json file because it is very large and causes
        // problems for PHPCS.
        return json_decode(file_get_contents(__DIR__ . '/fixtures/RectangleTest.json'));
    }

}