Issue #3075443 by oknate, Wim Leers, seanB: Follow-up for #2994699:...

Issue #3075443 by oknate, Wim Leers, seanB: Follow-up for #2994699: Cardinality should be 1 for inserting embedded media

core/modules/media_library/src/Plugin/CKEditorPlugin/DrupalMediaLibrary.php

@@ -125,7 +125,7 @@ public function getConfig(Editor $editor) {
       'media_library.opener.editor',
       $media_type_ids,
       reset($media_type_ids),
-      -1,
+      1,
       ['filter_format_id' => $editor->getFilterFormat()->id()]
     );
 

core/modules/media_library/tests/src/FunctionalJavascript/CKEditorIntegrationTest.php

@@ -164,7 +164,9 @@ public function testButton() {
       $this->assertSame($expected_tab_order[$key], $tab->getText());
     }
 
+    $assert_session->pageTextContains('0 of 1 item selected');
     $assert_session->elementExists('css', '.media-library-item')->click();
+    $assert_session->pageTextContains('1 of 1 item selected');
     $assert_session->elementExists('css', 'button.media-library-select.button.button--primary')->click();
     $this->assignNameToCkeditorIframe();
     $this->getSession()->switchToIFrame('ckeditor');