1 files changed, 90 insertions, 0 deletions
diff --git a/test/background/operators/impls/FindPrevOperator.test.ts b/test/background/operators/impls/FindPrevOperator.test.ts
new file mode 100644
index 0000000..409c26d
--- /dev/null
+++ b/test/background/operators/impls/FindPrevOperator.test.ts
@@ -0,0 +1,90 @@
+import sinon from "sinon";
+import MockTabPresenter from "../../mock/MockTabPresenter";
+import FindNextOperator from "../../../../src/background/operators/impls/FindNextOperator";
+import { FindState } from "../../../../src/background/repositories/FindRepository";
+import MockFindRepository from "../../mock/MockFindRepository";
+import MockFindClient from "../../mock/MockFindClient";
+
+describe("FindPrevOperator", () => {
+  describe("#run", () => {
+    it("throws an error on no previous keywords", async () => {
+      const tabPresenter = new MockTabPresenter();
+      const findRepository = new MockFindRepository();
+      const findClient = new MockFindClient();
+      await tabPresenter.create("https://example.com/");
+
+      const sut = new FindNextOperator(
+        tabPresenter,
+        findRepository,
+        findClient
+      );
+      try {
+        await sut.run();
+      } catch (e) {
+        return;
+      }
+      throw new Error("unexpected reach");
+    });
+
+    it("select a next next", async () => {
+      const tabPresenter = new MockTabPresenter();
+      const findRepository = new MockFindRepository();
+      const findClient = new MockFindClient();
+      const currentTab = await tabPresenter.create("https://example.com/");
+
+      const state: FindState = {
+        keyword: "Hello, world",
+        rangeData: [
+          {
+            framePos: 0,
+            startOffset: 0,
+            endOffset: 10,
+            startTextNodePos: 0,
+            endTextNodePos: 0,
+            text: "Hello, world",
+          },
+          {
+            framePos: 1,
+            startOffset: 0,
+            endOffset: 10,
+            startTextNodePos: 1,
+            endTextNodePos: 1,
+            text: "Hello, world",
+          },
+          {
+            framePos: 2,
+            startOffset: 2,
+            endOffset: 10,
+            startTextNodePos: 1,
+            endTextNodePos: 1,
+            text: "Hello, world",
+          },
+        ],
+        highlightPosition: 1,
+      };
+
+      await findRepository.setLocalState(currentTab.id!, state);
+      const mock = sinon.mock(findClient);
+      mock
+        .expects("selectKeyword")
+        .withArgs(currentTab?.id, state.rangeData[0]);
+      mock
+        .expects("selectKeyword")
+        .withArgs(currentTab?.id, state.rangeData[2]);
+      mock
+        .expects("selectKeyword")
+        .withArgs(currentTab?.id, state.rangeData[1]);
+      const sut = new FindNextOperator(
+        tabPresenter,
+        findRepository,
+        findClient
+      );
+
+      await sut.run();
+      await sut.run();
+      await sut.run();
+
+      mock.verify();
+    });
+  });
+});