1 files changed, 41 insertions, 0 deletions
diff --git a/browser/components/customizableui/test/browser_1096763_seen_widgets_post_reset.js b/browser/components/customizableui/test/browser_1096763_seen_widgets_post_reset.js
new file mode 100644
index 0000000000..74854f499c
--- /dev/null
+++ b/browser/components/customizableui/test/browser_1096763_seen_widgets_post_reset.js
@@ -0,0 +1,41 @@
+"use strict";
+
+const BUTTONID = "test-seenwidget-post-reset";
+
+add_task(async function () {
+  CustomizableUI.createWidget({
+    id: BUTTONID,
+    label: "Test widget seen post reset",
+    defaultArea: CustomizableUI.AREA_NAVBAR,
+  });
+
+  const kPrefCustomizationState = "browser.uiCustomization.state";
+  ok(
+    CustomizableUI.getTestOnlyInternalProp("gSeenWidgets").has(BUTTONID),
+    "Widget should be seen after createWidget is called."
+  );
+  CustomizableUI.reset();
+  ok(
+    CustomizableUI.getTestOnlyInternalProp("gSeenWidgets").has(BUTTONID),
+    "Widget should still be seen after reset."
+  );
+  CustomizableUI.addWidgetToArea(BUTTONID, CustomizableUI.AREA_NAVBAR);
+  gCustomizeMode.removeFromArea(document.getElementById(BUTTONID));
+  let hasUserValue = Services.prefs.prefHasUserValue(kPrefCustomizationState);
+  ok(hasUserValue, "Pref should be set right now.");
+  if (hasUserValue) {
+    let seenArray = JSON.parse(
+      Services.prefs.getCharPref(kPrefCustomizationState)
+    ).seen;
+    isnot(
+      seenArray.indexOf(BUTTONID),
+      -1,
+      "Widget should be in saved 'seen' list."
+    );
+  }
+});
+
+registerCleanupFunction(function () {
+  CustomizableUI.destroyWidget(BUTTONID);
+  CustomizableUI.reset();
+});