1 files changed, 17 insertions, 0 deletions
diff --git a/test/background/operators/impls/ZoomOutOperator.test.ts b/test/background/operators/impls/ZoomOutOperator.test.ts
new file mode 100644
index 0000000..e0bbcd9
--- /dev/null
+++ b/test/background/operators/impls/ZoomOutOperator.test.ts
@@ -0,0 +1,17 @@
+import sinon from "sinon";
+import ZoomOutOperator from "../../../../src/background/operators/impls/ZoomOutOperator";
+import MockZoomPresenter from "../../mock/MockZoomPresenter";
+
+describe("ZoomOutOperator", () => {
+  describe("#run", () => {
+    it("zoom-in the current tab", async () => {
+      const zoomPresenter = new MockZoomPresenter();
+      const mock = sinon.mock(zoomPresenter).expects("zoomOut").once();
+
+      const sut = new ZoomOutOperator(zoomPresenter);
+      await sut.run();
+
+      mock.verify();
+    });
+  });
+});