1 files changed, 56 insertions, 0 deletions
diff --git a/browser/components/urlbar/tests/browser/browser_remoteness_switch.js b/browser/components/urlbar/tests/browser/browser_remoteness_switch.js
new file mode 100644
index 0000000000..364eeff1b2
--- /dev/null
+++ b/browser/components/urlbar/tests/browser/browser_remoteness_switch.js
@@ -0,0 +1,56 @@
+"use strict";
+
+/**
+ * Verify that when loading and going back/forward through history between URLs
+ * loaded in the content process, and URLs loaded in the parent process, we
+ * don't set the URL for the tab to about:blank inbetween the loads.
+ */
+add_task(async function () {
+  await SpecialPowers.pushPrefEnv({
+    set: [["browser.navigation.requireUserInteraction", false]],
+  });
+  let url = "http://www.example.com/foo.html";
+  await BrowserTestUtils.withNewTab(
+    { gBrowser, url },
+    async function (browser) {
+      let wpl = {
+        onLocationChange(unused, unused2, location) {
+          if (location.schemeIs("about")) {
+            is(
+              location.spec,
+              "about:config",
+              "Only about: location change should be for about:preferences"
+            );
+          } else {
+            is(
+              location.spec,
+              url,
+              "Only non-about: location change should be for the http URL we're dealing with."
+            );
+          }
+        },
+      };
+      gBrowser.addProgressListener(wpl);
+
+      let didLoad = BrowserTestUtils.browserLoaded(
+        browser,
+        null,
+        function (loadedURL) {
+          return loadedURL == "about:config";
+        }
+      );
+      BrowserTestUtils.loadURIString(browser, "about:config");
+      await didLoad;
+
+      gBrowser.goBack();
+      await BrowserTestUtils.browserLoaded(browser, null, function (loadedURL) {
+        return url == loadedURL;
+      });
+      gBrowser.goForward();
+      await BrowserTestUtils.browserLoaded(browser, null, function (loadedURL) {
+        return loadedURL == "about:config";
+      });
+      gBrowser.removeProgressListener(wpl);
+    }
+  );
+});