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test/unit/pdf_history_spec.js

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+/* Copyright 2017 Mozilla Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { isDestArraysEqual, isDestHashesEqual } from "../../web/pdf_history.js";
+
+describe("pdf_history", function () {
+  describe("isDestHashesEqual", function () {
+    it("should reject non-equal destination hashes", function () {
+      expect(isDestHashesEqual(null, "page.157")).toEqual(false);
+      expect(isDestHashesEqual("title.0", "page.157")).toEqual(false);
+      expect(isDestHashesEqual("page=1&zoom=auto", "page.157")).toEqual(false);
+
+      expect(isDestHashesEqual("nameddest-page.157", "page.157")).toEqual(
+        false
+      );
+      expect(isDestHashesEqual("page.157", "nameddest=page.157")).toEqual(
+        false
+      );
+
+      const destArrayString = JSON.stringify([
+        { num: 3757, gen: 0 },
+        { name: "XYZ" },
+        92.918,
+        748.972,
+        null,
+      ]);
+      expect(isDestHashesEqual(destArrayString, "page.157")).toEqual(false);
+      expect(isDestHashesEqual("page.157", destArrayString)).toEqual(false);
+    });
+
+    it("should accept equal destination hashes", function () {
+      expect(isDestHashesEqual("page.157", "page.157")).toEqual(true);
+      expect(isDestHashesEqual("nameddest=page.157", "page.157")).toEqual(true);
+
+      expect(
+        isDestHashesEqual("nameddest=page.157&zoom=100", "page.157")
+      ).toEqual(true);
+    });
+  });
+
+  describe("isDestArraysEqual", function () {
+    const firstDest = [{ num: 1, gen: 0 }, { name: "XYZ" }, 0, 375, null];
+    const secondDest = [{ num: 5, gen: 0 }, { name: "XYZ" }, 0, 375, null];
+    const thirdDest = [{ num: 1, gen: 0 }, { name: "XYZ" }, 750, 0, null];
+    const fourthDest = [{ num: 1, gen: 0 }, { name: "XYZ" }, 0, 375, 1.0];
+    const fifthDest = [{ gen: 0, num: 1 }, { name: "XYZ" }, 0, 375, null];
+
+    it("should reject non-equal destination arrays", function () {
+      expect(isDestArraysEqual(firstDest, undefined)).toEqual(false);
+      expect(isDestArraysEqual(firstDest, [1, 2, 3, 4, 5])).toEqual(false);
+
+      expect(isDestArraysEqual(firstDest, secondDest)).toEqual(false);
+      expect(isDestArraysEqual(firstDest, thirdDest)).toEqual(false);
+      expect(isDestArraysEqual(firstDest, fourthDest)).toEqual(false);
+    });
+
+    it("should accept equal destination arrays", function () {
+      expect(isDestArraysEqual(firstDest, firstDest)).toEqual(true);
+      expect(isDestArraysEqual(firstDest, fifthDest)).toEqual(true);
+
+      const firstDestCopy = firstDest.slice();
+      expect(firstDest).not.toBe(firstDestCopy);
+
+      expect(isDestArraysEqual(firstDest, firstDestCopy)).toEqual(true);
+    });
+  });
+});