1 files changed, 69 insertions, 0 deletions
diff --git a/browser/components/syncedtabs/test/xpcshell/test_SyncedTabsDeckStore.js b/browser/components/syncedtabs/test/xpcshell/test_SyncedTabsDeckStore.js
new file mode 100644
index 0000000000..a75ded8c8a
--- /dev/null
+++ b/browser/components/syncedtabs/test/xpcshell/test_SyncedTabsDeckStore.js
@@ -0,0 +1,69 @@
+"use strict";
+
+let { SyncedTabsDeckStore } = ChromeUtils.importESModule(
+  "resource:///modules/syncedtabs/SyncedTabsDeckStore.sys.mjs"
+);
+
+add_task(async function testSelectUnkownPanel() {
+  let deckStore = new SyncedTabsDeckStore();
+  let spy = sinon.spy();
+
+  deckStore.on("change", spy);
+  deckStore.selectPanel("foo");
+
+  Assert.ok(!spy.called);
+});
+
+add_task(async function testSetPanels() {
+  let deckStore = new SyncedTabsDeckStore();
+  let spy = sinon.spy();
+
+  deckStore.on("change", spy);
+  deckStore.setPanels(["panel1", "panel2"]);
+
+  Assert.ok(
+    spy.calledWith({
+      panels: [
+        { id: "panel1", selected: false },
+        { id: "panel2", selected: false },
+      ],
+      isUpdatable: false,
+    })
+  );
+});
+
+add_task(async function testSelectPanel() {
+  let deckStore = new SyncedTabsDeckStore();
+  let spy = sinon.spy();
+
+  deckStore.setPanels(["panel1", "panel2"]);
+
+  deckStore.on("change", spy);
+  deckStore.selectPanel("panel2");
+
+  Assert.ok(
+    spy.calledWith({
+      panels: [
+        { id: "panel1", selected: false },
+        { id: "panel2", selected: true },
+      ],
+      isUpdatable: true,
+    })
+  );
+
+  deckStore.selectPanel("panel2");
+  Assert.ok(spy.calledOnce, "doesn't trigger unless panel changes");
+});
+
+add_task(async function testSetPanelsSameArray() {
+  let deckStore = new SyncedTabsDeckStore();
+  let spy = sinon.spy();
+  deckStore.on("change", spy);
+
+  let panels = ["panel1", "panel2"];
+
+  deckStore.setPanels(panels);
+  deckStore.setPanels(panels);
+
+  Assert.ok(spy.calledOnce, "doesn't trigger unless set of panels changes");
+});