file_validate_image_resolution example

$errors = file_validate_is_image($this->nonImage);
    $this->assertCount(1, $errors, 'An error reported for our non-image file.');
  }

  /** * This ensures the resolution of a specific file is within bounds. * * The image will be resized if it's too large. */
  public function testFileValidateImageResolution() {
    // Non-images.     $errors = file_validate_image_resolution($this->nonImage);
    $this->assertCount(0, $errors, 'Should not get any errors for a non-image file.');
    $errors = file_validate_image_resolution($this->nonImage, '50x50', '100x100');
    $this->assertCount(0, $errors, 'Do not check the resolution on non files.');

    // Minimum size.     $errors = file_validate_image_resolution($this->image);
    $this->assertCount(0, $errors, 'No errors for an image when there is no minimum or maximum resolution.');
    $errors = file_validate_image_resolution($this->image, 0, '200x1');
    $this->assertCount(1, $errors, 'Got an error for an image that was not wide enough.');
    $errors = file_validate_image_resolution($this->image, 0, '1x200');
    $this->assertCount(1, $errors, 'Got an error for an image that was not tall enough.');