checkPixel() public static méthode

public static checkPixel ( $file, $x, $y, $color = '#FFFFFF', $upper_color = false )
 function testCropTopCenter()
 {
     $cropper = TestTimberImage::copyTestImage('cropper.png');
     $resized = TimberImageHelper::resize($cropper, 300, 100, 'top-center');
     $resized = str_replace('http://example.org', '', $resized);
     $resized = TimberUrlHelper::url_to_file_system($resized);
     $is_red = TestTimberImage::checkPixel($resized, 100, 50, '#ff0000', '#ff0800');
     $this->assertTrue($is_red);
 }
 function testCropBottom()
 {
     $cropper = TestTimberImage::copyTestImage('cropper.png');
     $resized = TimberImageHelper::resize($cropper, 300, 100, 'bottom');
     $resized = str_replace('http://example.org', '', $resized);
     $resized = TimberUrlHelper::url_to_file_system($resized);
     $is_teal = TestTimberImage::checkPixel($resized, 290, 90, '#00ffff');
     $this->assertTrue($is_teal);
 }
 function testLetterboxGif()
 {
     $base_file = 'panam.gif';
     $file_loc = TestTimberImage::copyTestImage($base_file);
     $upload_dir = wp_upload_dir();
     $new_file = TimberImageHelper::letterbox($upload_dir['url'] . '/' . $base_file, 300, 100, '00FF00', true);
     $location_of_image = TimberImageHelper::get_server_location($new_file);
     $this->assertTrue(TestTimberImage::checkSize($location_of_image, 300, 100));
     //whats the bg/color of the image
     $this->assertTrue(TestTimberImage::checkPixel($location_of_image, 50, 10, "#00FF00", "#00FF10"));
     $this->assertFileExists($location_of_image);
 }