1 files changed, 76 insertions, 0 deletions
diff --git a/browser/components/newtab/test/unit/lib/SystemTickFeed.test.js b/browser/components/newtab/test/unit/lib/SystemTickFeed.test.js
new file mode 100644
index 0000000000..4dd5febdb2
--- /dev/null
+++ b/browser/components/newtab/test/unit/lib/SystemTickFeed.test.js
@@ -0,0 +1,76 @@
+import { SYSTEM_TICK_INTERVAL, SystemTickFeed } from "lib/SystemTickFeed.jsm";
+import { actionTypes as at } from "common/Actions.sys.mjs";
+import { GlobalOverrider } from "test/unit/utils";
+
+describe("System Tick Feed", () => {
+  let globals;
+  let instance;
+  let clock;
+
+  beforeEach(() => {
+    globals = new GlobalOverrider();
+    clock = sinon.useFakeTimers();
+
+    instance = new SystemTickFeed();
+    instance.store = {
+      getState() {
+        return {};
+      },
+      dispatch() {},
+    };
+  });
+  afterEach(() => {
+    globals.restore();
+    clock.restore();
+  });
+  it("should create a SystemTickFeed", () => {
+    assert.instanceOf(instance, SystemTickFeed);
+  });
+  it("should fire SYSTEM_TICK events at configured interval", () => {
+    globals.set("ChromeUtils", {
+      idleDispatch: f => f(),
+    });
+    let expectation = sinon
+      .mock(instance.store)
+      .expects("dispatch")
+      .twice()
+      .withExactArgs({ type: at.SYSTEM_TICK });
+
+    instance.onAction({ type: at.INIT });
+    clock.tick(SYSTEM_TICK_INTERVAL * 2);
+    expectation.verify();
+  });
+  it("should not fire SYSTEM_TICK events after UNINIT", () => {
+    let expectation = sinon.mock(instance.store).expects("dispatch").never();
+
+    instance.onAction({ type: at.UNINIT });
+    clock.tick(SYSTEM_TICK_INTERVAL * 2);
+    expectation.verify();
+  });
+  it("should not fire SYSTEM_TICK events while the user is away", () => {
+    let expectation = sinon.mock(instance.store).expects("dispatch").never();
+
+    instance.onAction({ type: at.INIT });
+    instance._idleService = { idleTime: SYSTEM_TICK_INTERVAL + 1 };
+    clock.tick(SYSTEM_TICK_INTERVAL * 3);
+    expectation.verify();
+    instance.onAction({ type: at.UNINIT });
+  });
+  it("should fire SYSTEM_TICK immediately when the user is active again", () => {
+    globals.set("ChromeUtils", {
+      idleDispatch: f => f(),
+    });
+    let expectation = sinon
+      .mock(instance.store)
+      .expects("dispatch")
+      .once()
+      .withExactArgs({ type: at.SYSTEM_TICK });
+
+    instance.onAction({ type: at.INIT });
+    instance._idleService = { idleTime: SYSTEM_TICK_INTERVAL + 1 };
+    clock.tick(SYSTEM_TICK_INTERVAL * 3);
+    instance.observe();
+    expectation.verify();
+    instance.onAction({ type: at.UNINIT });
+  });
+});