Bug 1461742, test for getCustomInterfaceCallback, r=bgrins

2018-07-19 09:32:18 -04:00 · 2018-07-19 09:32:18 -04:00 · a9bdfae60b
--- a/toolkit/content/tests/chrome/test_custom_element_base.xul
+++ b/toolkit/content/tests/chrome/test_custom_element_base.xul
@ -12,6 +12,8 @@
  <!-- test results are displayed in the html:body -->
  <body xmlns="http://www.w3.org/1999/xhtml" style="height: 300px; overflow: auto;"/>

+  <simpleelement id="simple"/>
+
  <!-- test code goes here -->
  <script type="application/javascript"><![CDATA[

@ -20,6 +22,7 @@
  function runTests() {
    ok(MozXULElement, "MozXULElement defined on the window");
    testParseXULToFragment();
+    testCustomInterface();
    SimpleTest.finish();
  }

@ -39,6 +42,39 @@
    deck.remove();
  }

+  function testCustomInterface() {
+    class SimpleElement extends MozXULElement {
+      get disabled() {
+        return false;
+      }
+
+      set disabled(val) {
+      }
+
+      get tabIndex() {
+        return 0;
+      }
+
+      set tabIndex(val) {
+      }
+    }
+
+    customElements.define("simpleelement", SimpleElement);
+    MozXULElement.implementCustomInterface(SimpleElement, [Ci.nsIDOMXULControlElement]);
+
+    is(document.documentElement.getCustomInterfaceCallback, undefined,
+       "No getCustomInterfaceCallback on non-custom element");
+    is(typeof document.getElementById("simple").getCustomInterfaceCallback, "function",
+       "getCustomInterfaceCallback available on custom element when set");
+    try {
+      document.documentElement.QueryInterface(Ci.nsIDOMXULControlElement)
+      ok(false, "Non-custom element implements custom interface");
+    } catch (ex) {
+      ok(true, "Non-custom element implements custom interface");
+    }
+    ok(document.getElementById("simple").QueryInterface(Ci.nsIDOMXULControlElement),
+       "Implements custom interface");
+  }
  ]]>
  </script>
 </window>