1 files changed, 47 insertions, 0 deletions
diff --git a/browser/base/content/test/general/browser_aboutNetError.js b/browser/base/content/test/general/browser_aboutNetError.js
new file mode 100644
index 000000000..5185cbcaa
--- /dev/null
+++ b/browser/base/content/test/general/browser_aboutNetError.js
@@ -0,0 +1,47 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Set ourselves up for TLS error
+Services.prefs.setIntPref("security.tls.version.max", 3);
+Services.prefs.setIntPref("security.tls.version.min", 3);
+
+const LOW_TLS_VERSION = "https://tls1.example.com/";
+const {TabStateFlusher} = Cu.import("resource:///modules/sessionstore/TabStateFlusher.jsm", {});
+const ss = Cc["@mozilla.org/browser/sessionstore;1"].getService(Ci.nsISessionStore);
+
+add_task(function* checkReturnToPreviousPage() {
+  info("Loading a TLS page that isn't supported, ensure we have a fix button and clicking it then loads the page");
+  let browser;
+  let pageLoaded;
+  yield BrowserTestUtils.openNewForegroundTab(gBrowser, () => {
+    gBrowser.selectedTab = gBrowser.addTab(LOW_TLS_VERSION);
+    browser = gBrowser.selectedBrowser;
+    pageLoaded = BrowserTestUtils.waitForErrorPage(browser);
+  }, false);
+
+  info("Loading and waiting for the net error");
+  yield pageLoaded;
+
+  // NB: This code assumes that the error page and the test page load in the
+  // same process. If this test starts to fail, it could be because they load
+  // in different processes.
+  yield ContentTask.spawn(browser, LOW_TLS_VERSION, function* (LOW_TLS_VERSION_) {
+    ok(content.document.getElementById("prefResetButton").getBoundingClientRect().left >= 0,
+      "Should have a visible button");
+
+    ok(content.document.documentURI.startsWith("about:neterror"), "Should be showing error page");
+
+    let doc = content.document;
+    let prefResetButton = doc.getElementById("prefResetButton");
+    is(prefResetButton.getAttribute("autofocus"), "true", "prefResetButton has autofocus");
+    prefResetButton.click();
+
+    yield ContentTaskUtils.waitForEvent(this, "pageshow", true);
+
+    is(content.document.documentURI, LOW_TLS_VERSION_, "Should not be showing page");
+  });
+
+  yield BrowserTestUtils.removeTab(gBrowser.selectedTab);
+});