The prebuilt files include `web/pdf_viewer.js` with some viewer APIs. Those are missing from type declarations.
process.env.TESTING = "true";
  
  
  
  process.env.TZ = "UTC";
  done();
}
gulp.task(
  "test",
  gulp.series(setTestEnv, "generic", "components", function runTest() {
    return streamqueue(
      { objectMode: true },
      createTestSource("unit"),
      createTestSource("browser"),