MNT Behat test for inserting link on image

tests/behat/features/wysiwyg-image-toolbar.feature

@@ -35,3 +35,16 @@ Feature: Use the WYSIWYG image toolbar
     Then the "Content" HTML field should not contain "file1.jpg"
     # Required to avoid "unsaved changes" browser dialog
     When I press the "Save" button
+
+  Scenario: I can add link to an internal page to an image
+    Given I fill in the "Content" HTML field with "<p><img src='file1.jpg'/></p>"
+    When I select the image "file1.jpg" in the "Content" HTML field
+      And I press the "Insert link" HTML field button
+      And I click "Page on this site" in the ".tox-collection__group" element
+    Then I should see an "form#Form_editorInternalLink" element
+      And I should not see the "#Form_editorInternalLink_Text_Holder" element
+    When I select "About Us" in the "#Form_editorInternalLink_PageID_Holder" tree dropdown
+      And I fill in "my desc" for "Link description"
+      And I press the "Insert link" button
+    Then the "Content" HTML field should contain "<a title="my desc" href="[file_link,id=2]"><img src="file1.jpg"/></a>"
+    Then I press the "Save" button