1 files changed, 28 insertions, 0 deletions
diff --git a/test/background/operators/impls/ZoomOperatorFactoryChain.test.ts b/test/background/operators/impls/ZoomOperatorFactoryChain.test.ts
new file mode 100644
index 0000000..10c1cee
--- /dev/null
+++ b/test/background/operators/impls/ZoomOperatorFactoryChain.test.ts
@@ -0,0 +1,28 @@
+import "reflect-metadata";
+import { expect } from "chai";
+import ZoomOperatorFactoryChain from "../../../../src/background/operators/impls/ZoomOperatorFactoryChain";
+import MockZoomPresenter from "../../mock/MockZoomPresenter";
+import ZoomInOperator from "../../../../src/background/operators/impls/ZoomInOperator";
+import ZoomOutOperator from "../../../../src/background/operators/impls/ZoomOutOperator";
+import ResetZoomOperator from "../../../../src/background/operators/impls/ResetZoomOperator";
+import * as operations from "../../../../src/shared/operations";
+
+describe("ZoomOperatorFactoryChain", () => {
+  describe("#create", () => {
+    it("returns a operator for the operation", async () => {
+      const zoomPresenter = new MockZoomPresenter();
+      const sut = new ZoomOperatorFactoryChain(zoomPresenter);
+
+      expect(sut.create({ type: operations.ZOOM_IN })).to.be.instanceOf(
+        ZoomInOperator
+      );
+      expect(sut.create({ type: operations.ZOOM_OUT })).to.be.instanceOf(
+        ZoomOutOperator
+      );
+      expect(sut.create({ type: operations.ZOOM_NEUTRAL })).to.be.instanceOf(
+        ResetZoomOperator
+      );
+      expect(sut.create({ type: operations.CANCEL })).to.be.null;
+    });
+  });
+});