1 files changed, 25 insertions, 0 deletions
diff --git a/test/background/operators/impls/NavigateHistoryPrevOperator.test.ts b/test/background/operators/impls/NavigateHistoryPrevOperator.test.ts
new file mode 100644
index 0000000..6ebe71e
--- /dev/null
+++ b/test/background/operators/impls/NavigateHistoryPrevOperator.test.ts
@@ -0,0 +1,25 @@
+import sinon from "sinon";
+import NavigateHistoryPrevOperator from "../../../../src/background/operators/impls/NavigateHistoryPrevOperator";
+import MockTabPresenter from "../../mock/MockTabPresenter";
+import MockNavigateClient from "../../mock/MockNavigateClient";
+
+describe("NavigateHistoryPrevOperator", () => {
+  describe("#run", () => {
+    it("send a message to navigate previous in the history", async () => {
+      const navigateClient = new MockNavigateClient();
+      const mock = sinon
+        .mock(navigateClient)
+        .expects("historyPrev")
+        .withArgs(1);
+      const tabPresenter = new MockTabPresenter();
+      await tabPresenter.create("https://example.com/1", { active: false });
+      await tabPresenter.create("https://example.com/2", { active: true });
+      await tabPresenter.create("https://example.com/3", { active: false });
+      const sut = new NavigateHistoryPrevOperator(tabPresenter, navigateClient);
+
+      await sut.run();
+
+      mock.verify();
+    });
+  });
+});