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

test/integration/simple_viewer_spec.mjs

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+/* Copyright 2026 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.
+ */
+
+// Integration tests for the simple viewer (test/components/).
+
+function getSelector(id) {
+  return `[data-element-id="${id}"]`;
+}
+
+function getAnnotationSelector(id) {
+  return `[data-annotation-id="${id}"]`;
+}
+
+describe("Simple viewer", () => {
+  describe("TextLayerBuilder without abortSignal", () => {
+    let pages;
+
+    beforeEach(async () => {
+      const origin = new URL(global.integrationBaseUrl).origin;
+      pages = await Promise.all(
+        global.integrationSessions.map(async session => {
+          const page = await session.browser.newPage();
+          await page.goto(
+            `${origin}/test/components/simple-viewer.html` +
+              `?file=/test/pdfs/tracemonkey.pdf`
+          );
+          await page.bringToFront();
+          await page.waitForSelector(
+            "[data-page-number='1'] .textLayer .endOfContent"
+          );
+          await page.waitForSelector(
+            "[data-page-number='2'] .textLayer .endOfContent"
+          );
+          return [session.name, page];
+        })
+      );
+    });
+
+    afterEach(async () => {
+      await Promise.all(pages.map(([, page]) => page.close()));
+    });
+
+    it("must produce text spans in the text layer", async () => {
+      await Promise.all(
+        pages.map(async ([browserName, page]) => {
+          const count = await page.evaluate(
+            () => document.querySelectorAll(".textLayer span").length
+          );
+          expect(count).withContext(`In ${browserName}`).toBeGreaterThan(0);
+        })
+      );
+    });
+  });
+
+  describe("Scripting support with evaljs.pdf", () => {
+    let pages;
+
+    beforeEach(async () => {
+      const origin = new URL(global.integrationBaseUrl).origin;
+      pages = await Promise.all(
+        global.integrationSessions.map(async session => {
+          const page = await session.browser.newPage();
+          await page.goto(
+            `${origin}/test/components/simple-viewer.html` +
+              `?file=/test/pdfs/evaljs.pdf`
+          );
+          await page.bringToFront();
+          await page.waitForSelector(getSelector("55R"));
+          await page.waitForFunction(
+            "window.pdfScriptingManager?.ready === true"
+          );
+          return [session.name, page];
+        })
+      );
+    });
+
+    afterEach(async () => {
+      await Promise.all(pages.map(([, page]) => page.close()));
+    });
+
+    it("must evaluate JavaScript entered in the input field", async () => {
+      await Promise.all(
+        pages.map(async ([browserName, page]) => {
+          await page.type(getSelector("55R"), "1 + 1");
+          await page.click(getAnnotationSelector("57R"));
+          await page.waitForFunction(
+            `document.querySelector('${getSelector("56R")}').value !== ""`
+          );
+          const text = await page.$eval(getSelector("56R"), el => el.value);
+          expect(text).withContext(`In ${browserName}`).toEqual("2");
+        })
+      );
+    });
+  });
+});