1 files changed, 55 insertions, 0 deletions
diff --git a/browser/components/preferences/tests/browser_bug1579418.js b/browser/components/preferences/tests/browser_bug1579418.js
new file mode 100644
index 0000000000..a179ae9936
--- /dev/null
+++ b/browser/components/preferences/tests/browser_bug1579418.js
@@ -0,0 +1,55 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+add_task(async function default_homepage_test() {
+  let oldHomepagePref = Services.prefs.getCharPref("browser.startup.homepage");
+  let oldStartpagePref = Services.prefs.getIntPref("browser.startup.page");
+
+  await openPreferencesViaOpenPreferencesAPI("paneHome", { leaveOpen: true });
+
+  let doc = gBrowser.contentDocument;
+  let homeMode = doc.getElementById("homeMode");
+  let customSettings = doc.getElementById("customSettings");
+
+  // HOME_MODE_FIREFOX_HOME
+  homeMode.value = 0;
+
+  homeMode.dispatchEvent(new Event("command"));
+
+  is(Services.prefs.getCharPref("browser.startup.homepage"), "about:home");
+
+  // HOME_MODE_BLANK
+  homeMode.value = 1;
+
+  homeMode.dispatchEvent(new Event("command"));
+
+  await TestUtils.waitForCondition(
+    () => customSettings.hidden === true,
+    "Wait for customSettings to be hidden."
+  );
+
+  is(
+    Services.prefs.getCharPref("browser.startup.homepage"),
+    "chrome://browser/content/blanktab.html"
+  );
+
+  // HOME_MODE_CUSTOM
+  homeMode.value = 2;
+
+  homeMode.dispatchEvent(new Event("command"));
+
+  await TestUtils.waitForCondition(
+    () => customSettings.hidden === false,
+    "Wait for customSettings to be shown."
+  );
+
+  is(customSettings.hidden, false, "homePageURL should be visible");
+
+  registerCleanupFunction(async () => {
+    Services.prefs.setCharPref("browser.startup.homepage", oldHomepagePref);
+    Services.prefs.setIntPref("browser.startup.page", oldStartpagePref);
+    BrowserTestUtils.removeTab(gBrowser.selectedTab);
+  });
+});