1 files changed, 35 insertions, 0 deletions
diff --git a/test/background/operators/impls/SelectTabPrevOperator.test.ts b/test/background/operators/impls/SelectTabPrevOperator.test.ts
new file mode 100644
index 0000000..c9092fa
--- /dev/null
+++ b/test/background/operators/impls/SelectTabPrevOperator.test.ts
@@ -0,0 +1,35 @@
+import { expect } from "chai";
+import MockTabPresenter from "../../mock/MockTabPresenter";
+import SelectTabPrevOperator from "../../../../src/background/operators/impls/SelectTabPrevOperator";
+
+describe("SelectTabPrevOperator", () => {
+  describe("#run", () => {
+    it("select a left tab of the current tab", async () => {
+      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 SelectTabPrevOperator(tabPresenter);
+      await sut.run();
+
+      const url = (await tabPresenter.getCurrent()).url;
+      expect(url).to.equal("https://example.com/1");
+    });
+  });
+
+  describe("#run", () => {
+    it("select a left tab of the current tab in rotation", async () => {
+      const tabPresenter = new MockTabPresenter();
+      await tabPresenter.create("https://example.com/1", { active: true });
+      await tabPresenter.create("https://example.com/2", { active: false });
+      await tabPresenter.create("https://example.com/3", { active: false });
+
+      const sut = new SelectTabPrevOperator(tabPresenter);
+      await sut.run();
+
+      const url = (await tabPresenter.getCurrent()).url;
+      expect(url).to.equal("https://example.com/3");
+    });
+  });
+});