import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

devtools/client/inspector/rules/test/browser_rules_refresh-no-flicker.js

@@ -0,0 +1,39 @@
+/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+ http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Test that the rule view does not go blank while selecting a new node.
+
+const TESTCASE_URI = "data:text/html;charset=utf-8," +
+                     "<div id=\"testdiv\" style=\"font-size:10px;\">" +
+                     "Test div!</div>";
+
+add_task(function* () {
+  yield addTab(TESTCASE_URI);
+
+  info("Opening the rule view and selecting the test node");
+  let {inspector, view} = yield openRuleView();
+  let testdiv = yield getNodeFront("#testdiv", inspector);
+  yield selectNode(testdiv, inspector);
+
+  let htmlBefore = view.element.innerHTML;
+  ok(htmlBefore.indexOf("font-size") > -1,
+     "The rule view should contain a font-size property.");
+
+  // Do the selectNode call manually, because otherwise it's hard to guarantee
+  // that we can make the below checks at a reasonable time.
+  info("refreshing the node");
+  let p = view.selectElement(testdiv, true);
+  is(view.element.innerHTML, htmlBefore,
+     "The rule view is unchanged during selection.");
+  ok(view.element.classList.contains("non-interactive"),
+     "The rule view is marked non-interactive.");
+  yield p;
+
+  info("node refreshed");
+  ok(!view.element.classList.contains("non-interactive"),
+     "The rule view is marked interactive again.");
+});
+