1 files changed, 120 insertions, 0 deletions
diff --git a/docshell/test/chrome/bug293235_window.xhtml b/docshell/test/chrome/bug293235_window.xhtml
new file mode 100644
index 0000000000..8bb050cebb
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+++ b/docshell/test/chrome/bug293235_window.xhtml
@@ -0,0 +1,120 @@
+<?xml version="1.0"?>
+<?xml-stylesheet href="chrome://global/skin" type="text/css"?>
+
+<window id="293235Test"
+        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+        width="600"
+        height="600"
+        onload="setTimeout(runTests, 0);"
+        title="bug 293235 test">
+
+  <script type="application/javascript" src= "chrome://mochikit/content/chrome-harness.js" />
+  <script type="application/javascript" src="docshell_helpers.js" />
+  <script src="chrome://mochikit/content/tests/SimpleTest/WindowSnapshot.js"></script>
+
+  <script type="application/javascript"><![CDATA[
+    var {NetUtil} = ChromeUtils.importESModule(
+      "resource://gre/modules/NetUtil.sys.mjs"
+    );
+
+    // Return the Element object for the specified element id
+    function $(id) { return TestWindow.getDocument().getElementById(id); }
+
+    ////
+    // Generator function for test steps for bug 293235:
+    // A visited link should have the :visited style applied
+    // to it when displayed on a page which was fetched from
+    // the bfcache.
+    //
+    async function runTests() {
+      // Register our observer to know when the link lookup is complete.
+      let testURI = NetUtil.newURI(getHttpUrl("bug293235_p2.html"));
+      let os = SpecialPowers.Services.obs;
+      // Load a test page containing a link that should be initially
+      // blue, per the :link style.
+      await new Promise(resolve => {
+        doPageNavigation({
+          uri: getHttpUrl("bug293235.html"),
+          onNavComplete: resolve,
+        });
+      });
+
+      // Now that we've been notified, we can check our link color.
+      // Since we can't use getComputedStyle() for this because
+      // getComputedStyle lies about styles that result from :visited,
+      // we have to take snapshots.
+      // First, take two reference snapshots.
+      var link1 = $("link1");
+      link1.className = "forcelink";
+      var refLink = await snapshotWindow(TestWindow.getWindow());
+      link1.className = "forcevisited";
+      var refVisited = await snapshotWindow(TestWindow.getWindow());
+      link1.className = "";
+      function snapshotsEqual(snap1, snap2) {
+        return compareSnapshots(snap1, snap2, true)[0];
+      }
+      ok(!snapshotsEqual(refLink, refVisited), "references should not match");
+      ok(snapshotsEqual(refLink, await snapshotWindow(TestWindow.getWindow())),
+         "link should initially be blue");
+
+      let observedVisit = false, observedPageShow = false;
+      await new Promise(resolve => {
+        function maybeResolve() {
+          ok(true, "maybe run next test? visited: " + observedVisit + " pageShow: " + observedPageShow);
+          if (observedVisit && observedPageShow)
+            resolve();
+        }
+
+        // Because adding visits is async, we will not be notified immediately.
+        let visitObserver = {
+          observe(aSubject, aTopic, aData)
+          {
+            if (!testURI.equals(aSubject.QueryInterface(Ci.nsIURI))) {
+              return;
+            }
+            os.removeObserver(this, aTopic);
+            observedVisit = true;
+            maybeResolve();
+          },
+        };
+        os.addObserver(visitObserver, "uri-visit-saved");
+        // Load the page that the link on the previous page points to.
+        doPageNavigation({
+          uri: getHttpUrl("bug293235_p2.html"),
+          onNavComplete() {
+            observedPageShow = true;
+            maybeResolve();
+          }
+        });
+      })
+
+      // And the nodes get notified after the "uri-visit-saved" topic, so
+      // we need to execute soon...
+      await new Promise(SimpleTest.executeSoon);
+
+      // Go back, verify the original page was loaded from the bfcache,
+      // and verify that the link is now purple, per the
+      // :visited style.
+      await new Promise(resolve => {
+        doPageNavigation({
+          back: true,
+          eventsToListenFor: ["pageshow"],
+          expectedEvents: [ { type: "pageshow",
+                              persisted: true,
+                              title: "Bug 293235 page1" } ],
+          onNavComplete: resolve,
+        });
+      })
+
+      // Now we can test the link color.
+      ok(snapshotsEqual(refVisited, await snapshotWindow(TestWindow.getWindow())),
+         "visited link should be purple");
+
+      // Tell the framework the test is finished.
+      finish();
+    }
+
+  ]]></script>
+
+  <browser type="content" primary="true" flex="1" id="content" src="about:blank"/>
+</window>