Add feature test for updated media image size

features/media-image-size.feature

@@ -28,6 +28,53 @@ Feature: List image sizes
       | thumbnail      | 150       | 150       | hard   | 1:1   |
     And STDERR should be empty
 
+  @require-wp-5.3
+  Scenario: Basic usage with plugin which registers custom image size
+    Given a WP install
+    # Differing themes can have differing default image sizes. Let's stick to one.
+    And I try `wp theme install twentynineteen --activate`
+    And a wp-content/plugins/foo-bar.php file:
+      """
+      <?php
+      /**
+        * Plugin Name: Foo Bar
+        * Plugin URI: https://example.com
+        * Description: Custom plugin.
+        * Version: 0.1.0
+        * Author: John Doe
+        * Author URI: https://johndoe.com/
+        * License: GPL-2.0+
+        * License URI: http://www.gnu.org/licenses/gpl-2.0.txt
+        */
+
+      add_action(
+        'after_setup_theme',
+        function () {
+          add_image_size( 'foo-bar-thumb', 50, 50, true );
+        }
+      );
+      """
+    And I try `wp plugin activate foo-bar.php`
+
+    When I run `wp media image-size`
+    Then STDOUT should be a table containing rows:
+      | name           | width     | height    | crop   | ratio |
+      | full           |           |           | N/A    | N/A   |
+      | 2048x2048      | 2048      | 2048      | soft   | N/A   |
+      | post-thumbnail | 1568      | 9999      | soft   | N/A   |
+      | large          | 1024      | 1024      | soft   | N/A   |
+      | medium_large   | 768       | 0         | soft   | N/A   |
+      | medium         | 300       | 300       | soft   | N/A   |
+      | thumbnail      | 150       | 150       | hard   | 1:1   |
+      | foo-bar-thumb  | 50        | 50        | hard   | 1:1   |
+    And STDERR should be empty
+
+    When I run `wp media image-size --format=csv`
+    Then STDOUT should not contain:
+      """
+      ,0,0,
+      """
+
   # Behavior changed with WordPress 5.3+, so we're adding separate tests for previous versions.
   # Change that impacts this:
   # https://core.trac.wordpress.org/ticket/43524