fork from https://github.com/mozilla/pdf.js.git

test/unit/app_options_spec.js

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+/* Copyright 2024 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 { AppOptions, OptionKind } from "../../web/app_options.js";
+import { BasePreferences } from "../../web/preferences.js";
+import { objectSize } from "../../src/shared/util.js";
+
+describe("AppOptions", function () {
+  it("checks that getAll returns data, for every OptionKind", function () {
+    expect(Object.keys(OptionKind)).toEqual([
+      "BROWSER",
+      "VIEWER",
+      "API",
+      "WORKER",
+      "EVENT_DISPATCH",
+      "PREFERENCE",
+    ]);
+
+    for (const kind of Object.values(OptionKind)) {
+      expect(typeof kind).toEqual("number");
+
+      const options = AppOptions.getAll(kind);
+      expect(objectSize(options)).toBeGreaterThan(0);
+    }
+  });
+
+  it('checks that the number of "PREFERENCE" options does *not* exceed the maximum in mozilla-central', function () {
+    // If the following constant is updated then you *MUST* make the same change
+    // in mozilla-central as well to ensure that preference-fetching works; see
+    // https://searchfox.org/mozilla-central/source/toolkit/components/pdfjs/content/PdfStreamConverter.sys.mjs
+    const MAX_NUMBER_OF_PREFS = 50;
+
+    const options = AppOptions.getAll(OptionKind.PREFERENCE);
+    expect(objectSize(options)).toBeLessThanOrEqual(MAX_NUMBER_OF_PREFS);
+  });
+});
+
+describe("BasePreferences", function () {
+  it("checks that preference defaults are correct", async function () {
+    const TestPreferences = class extends BasePreferences {
+      async _readFromStorage(prefObj) {
+        return { prefs: Object.create(null) };
+      }
+    };
+
+    const testPrefs = new TestPreferences();
+    await testPrefs.initializedPromise;
+
+    expect(testPrefs.defaults).toEqual(
+      AppOptions.getAll(OptionKind.PREFERENCE, /* defaultOnly = */ true)
+    );
+  });
+});