function testPNGtoJPG() { $file_loc = self::copyTestImage('eastern-trans.png'); $upload_dir = wp_upload_dir(); $new_file = TimberImageHelper::img_to_jpg($upload_dir['url'] . '/eastern-trans.png', '#FFFF00'); $location_of_image = TimberImageHelper::get_server_location($new_file); $this->assertFileExists($location_of_image); $image = imagecreatefromjpeg($location_of_image); $pixel_rgb = imagecolorat($image, 1, 1); $colors = imagecolorsforindex($image, $pixel_rgb); $this->assertEquals(255, $colors['red']); $this->assertEquals(255, $colors['green']); $this->assertEquals(0, $colors['blue']); }