Add reject handler in /workers/modules/ WPTs.

Add reject handler for the tests, so if one test gets timeout,
the rest of the tests won't get NOT_RUN.

Differential Revision: https://phabricator.services.mozilla.com/D186470

bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1849172
gecko-commit: a4b3b09ad08da2e5b588b641b24f767ff91e5912
gecko-reviewers: dom-worker-reviewers, smaug
diff --git a/workers/modules/dedicated-worker-import-data-url-cross-origin.html b/workers/modules/dedicated-worker-import-data-url-cross-origin.html
index 3739094..2f790a0 100644
--- a/workers/modules/dedicated-worker-import-data-url-cross-origin.html
+++ b/workers/modules/dedicated-worker-import-data-url-cross-origin.html
@@ -12,8 +12,10 @@
     const dataURL = `data:text/javascript,import "${importURL}";`;
     const worker = new Worker(dataURL, { type: 'module' });
     worker.postMessage('Send message for tests from main script.');
-    const msgEvent =
-        await new Promise(resolve => worker.onmessage = resolve);
+    const msgEvent = await new Promise((resolve, reject) =>{
+        worker.onmessage = resolve;
+        worker.onerror = reject;
+    }).catch(e => assert_true(false));
     assert_array_equals(msgEvent.data,
         expectation === 'blocked' ? ['ERROR']
                                   : ['export-block-cross-origin.js']);
diff --git a/workers/modules/dedicated-worker-import-data-url.any.js b/workers/modules/dedicated-worker-import-data-url.any.js
index 0d8510d..b837ad6 100644
--- a/workers/modules/dedicated-worker-import-data-url.any.js
+++ b/workers/modules/dedicated-worker-import-data-url.any.js
@@ -14,7 +14,10 @@
 
     const worker = new Worker(dataURL, { type: 'module'});
     worker.postMessage('Send message for tests from main script.');
-    const msgEvent = await new Promise(resolve => worker.onmessage = resolve);
+    const msgEvent = await new Promise((resolve, reject) =>{
+        worker.onmessage = resolve;
+        worker.onerror = reject;
+    }).catch(e => assert_true(false));
     assert_array_equals(msgEvent.data, testCase.expectation);
   }, testCase.description);
 }
diff --git a/workers/modules/shared-worker-import-data-url-cross-origin.html b/workers/modules/shared-worker-import-data-url-cross-origin.html
index 3f22c50..06724a2 100644
--- a/workers/modules/shared-worker-import-data-url-cross-origin.html
+++ b/workers/modules/shared-worker-import-data-url-cross-origin.html
@@ -12,8 +12,11 @@
     const dataURL = `data:text/javascript,import "${importURL}";`;
     const worker = new SharedWorker(dataURL, { type: 'module' });
     worker.port.postMessage('Send message for tests from main script.');
-    const msgEvent =
-        await new Promise(resolve => worker.port.onmessage = resolve);
+    const msgEvent = await new Promise((resolve, reject) =>{
+        worker.port.onmessage = resolve;
+        worker.onerror = reject;
+    }).catch(e => assert_true(false));
+
     assert_array_equals(msgEvent.data,
         expectation === 'blocked' ? ['ERROR']
                                   : ['export-block-cross-origin.js']);
diff --git a/workers/modules/shared-worker-import-data-url.window.js b/workers/modules/shared-worker-import-data-url.window.js
index 6d54c0e..5c77f6d 100644
--- a/workers/modules/shared-worker-import-data-url.window.js
+++ b/workers/modules/shared-worker-import-data-url.window.js
@@ -14,8 +14,10 @@
 
     const worker = new SharedWorker(dataURL, { type: 'module'});
     worker.port.postMessage('Send message for tests from main script.');
-    const msgEvent =
-        await new Promise(resolve => worker.port.onmessage = resolve);
+    const msgEvent = await new Promise((resolve, reject) =>{
+        worker.port.onmessage = resolve;
+        worker.onerror = reject;
+    }).catch(e => assert_true(false));
     assert_array_equals(msgEvent.data, testCase.expectation);
   }, testCase.description);
 }