Update and expand worker MIME type checking tests

Follows whatwg/html#5302.
web-platform-tests · Aug 17, 2020 · 031409f · 031409f
1 parent d9d78b5
commit 031409f
Showing 1 changed file with 30 additions and 11 deletions.
diff --git a/workers/Worker_script_mimetype.htm b/workers/Worker_script_mimetype.htm
@@ -1,16 +1,35 @@
 <!DOCTYPE html>
-<title> Worker constructor with script inside text file </title>
+<title>Worker constructor with wrong MIME type scripts</title>
+<meta charset="utf-8">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
-<div id=log></div>
+
 <script>
-async_test(function(t) {
-  var worker = new Worker('./support/WorkerText.txt');
-  worker.onmessage = t.step_func_done(function(e) {
-    assert_equals(e.data, "Pass");
-  });
-  // TODO(mkwst): Revisit this after https://github.com/whatwg/html/issues/3255.
-  worker.onerror = t.unreached_func("Worker should load.");
-  worker.postMessage("start");
-});
+async_test(t => {
+  const worker = new Worker('./support/WorkerText.txt');
+  worker.onmessage = t.unreached_func("Worker should not recieve messages");
+  worker.onerror = () => t.done();
+}, "HTTP(S) URLs which respond with text/plain MIME type must not work");
+
+async_test(t => {
+  const url = URL.createObjectURL(new Blob(['postMessage("PASS")'])); // no MIME type parameter
+  const worker = new Worker(url);
+  worker.onmessage = () => t.done();
+  worker.onerror = t.unreached_func("Worker should not error");
+}, "blob: URLs should load, despite no MIME type for the backing Blob");
+
+async_test(t => {
+  const url = URL.createObjectURL(new Blob(['postMessage("PASS")'], { type: 'text/plain' }));
+  const worker = new Worker(url);
+  worker.onmessage = () => t.done();
+  worker.onerror = t.unreached_func("Worker should not error");
+}, "blob: URLs should load, despite the wrong MIME type for the backing Blob");
+
+async_test(t => {
+  const url = `data:text/plain,postMessage("PASS");`
+  const worker = new Worker(url);
+  worker.onmessage = () => t.done();
+  worker.onerror = t.unreached_func("Worker should not error");
+}, "data: URLs should load, despite the wrong MIME type");
+
 </script>