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

test/unit/pdf.worker_spec.js

@@ -0,0 +1,46 @@
+/* Copyright 2023 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 { PDFWorker } from "../../src/display/api.js";
+import { WorkerMessageHandler } from "../../src/core/worker.js";
+
+const expectedAPI = Object.freeze({
+  WorkerMessageHandler,
+});
+
+describe("pdfworker_api", function () {
+  afterEach(function () {
+    // Avoid interfering with other unit-tests, since `globalThis.pdfjsWorker`
+    // being defined will impact loading and usage of the worker.
+    PDFWorker._resetGlobalState();
+  });
+
+  it("checks that the *official* PDF.js-worker API exposes the expected functionality", async function () {
+    // eslint-disable-next-line no-unsanitized/method
+    const pdfworkerAPI = await import(
+      typeof PDFJSDev !== "undefined" && PDFJSDev.test("LIB")
+        ? "../../pdf.worker.js"
+        : "../../src/pdf.worker.js"
+    );
+
+    // The imported Object contains an (automatically) inserted Symbol,
+    // hence we copy the data to allow using a simple comparison below.
+    expect({ ...pdfworkerAPI }).toEqual(expectedAPI);
+
+    expect(Object.keys(globalThis.pdfjsWorker).sort()).toEqual(
+      Object.keys(expectedAPI).sort()
+    );
+  });
+});