1 files changed, 19 insertions, 0 deletions
diff --git a/testing/web-platform/tests/workers/Worker-formdata.any.js b/testing/web-platform/tests/workers/Worker-formdata.any.js
new file mode 100644
index 0000000000..a07f194bd2
--- /dev/null
+++ b/testing/web-platform/tests/workers/Worker-formdata.any.js
@@ -0,0 +1,19 @@
+// META: global=dedicatedworker
+test(() => {
+  assert_own_property(self, 'FormData');
+  assert_equals(FormData.length, 0);
+
+  var formData = new FormData();
+  assert_not_equals(formData, null);
+  assert_own_property(FormData.prototype, 'append');
+  formData.append('key', 'value');
+
+  var blob = new Blob([]);
+  assert_not_equals(blob, null);
+  formData.append('key', blob);
+  formData.append('key', blob, 'filename');
+
+  assert_throws_dom("DataCloneError",
+                    function() { postMessage(formData) },
+                    "Trying to clone formdata inside a postMessage results in an exception." );
+},'Test FormData interface object');