import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

testing/web-platform/tests/svg/linking/scripted/testcommon.js

@@ -0,0 +1,42 @@
+/**
+ * The const var for SVG and xlink namespaces
+ */
+const SVGNS = 'http://www.w3.org/2000/svg';
+const XLINKNS = 'http://www.w3.org/1999/xlink';
+
+/**
+ * Appends a svg element to the parent.
+ *
+ * @param test The testharness.js Test object. If provided, this will be used
+ *             to register a cleanup callback to remove the div when the test
+ *             finishes.
+ * @param tag The element tag name.
+ * @param parent The parent element of this new created svg element.
+ * @param attrs  A dictionary object with attribute names and values to set on
+ *               the div.
+ */
+function createSVGElement(test, tag, parent, attrs) {
+  var elem = document.createElementNS(SVGNS, tag);
+  if (attrs) {
+    for (var attrName in attrs) {
+      elem.setAttribute(attrName, attrs[attrName]);
+    }
+  }
+  parent.appendChild(elem);
+  test.add_cleanup(function() {
+    elem.remove();
+  });
+  return elem;
+}
+
+/**
+ * Create a Promise object which resolves when a specific event fires.
+ *
+ * @param object The event target.
+ * @param name The event name.
+ */
+function waitEvent(object, name) {
+  return new Promise(function(resolve) {
+    object.addEventListener(name, resolve, { once: true });
+  });
+}