Club Drupal

  /**

   * Test that we do not pass an array to drupal_add_http_header.

   */

  function testImageContentTypeHeaders() {

    $files = $this->drupalGetTestFiles('image');

    $file = array_shift($files);

    // Copy the test file to private folder.

    $private_file = file_copy($file, 'private://', FILE_EXISTS_RENAME);

    // Tell image_module_test module to return the headers we want to test.

    variable_set('image_module_test_invalid_headers', $private_file->uri);

    // Invoke image_style_deliver so it will try to set headers.

    $generated_url = image_style_url($this->style_name, $private_file->uri);

    $this->drupalGet($generated_url);

    variable_del('image_module_test_invalid_headers');

  }