Add test for ImageBitmap [Serializable] property (#19440)

Cwiiis · fserb · commit da1d683ea14b · 2019-10-04T11:33:34.000-04:00
diff --git a/2dcontext/imagebitmap/createImageBitmap-serializable.html b/2dcontext/imagebitmap/createImageBitmap-serializable.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<meta charset=utf-8>
+<title>createImageBitmap serialize test</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/common/namespaces.js"></script>
+<script src="common.sub.js"></script>
+<div id=log></div>
+<script>
+let worker, continuations = {};
+setup(function() {
+    worker = new Worker("transfer-worker.js");
+    worker.addEventListener("message", function(event) {
+        let { name, bitmap } = event.data;
+        if (continuations.hasOwnProperty(name)) {
+            continuations[name](bitmap);
+        }
+    });
+});
+
+for (let { name, factory } of imageSourceTypes) {
+    promise_test(function(t) {
+        return factory().then(createImageBitmap).then(function(bitmap) {
+            assert_equals(bitmap.width, 20);
+            assert_equals(bitmap.height, 20);
+
+            worker.postMessage({ name: t.name, bitmap: bitmap });
+
+            assert_equals(bitmap.width, 20);
+            assert_equals(bitmap.height, 20);
+
+            return new Promise(function(resolve) {
+                continuations[t.name] = resolve;
+            });
+        }).then(function(bitmap) {
+            assert_class_string(bitmap, "ImageBitmap");
+            assert_equals(bitmap.width, 20);
+            assert_equals(bitmap.height, 20);
+        });
+    }, `Serialize ImageBitmap created from ${name}`);
+}
+</script>
