fix error type test

Author: saschanaz

resources/test/tests/unit/basic.html

@@ -24,7 +24,12 @@
         assert_equals(typeof WebIDL2.parse, "function");
     }, 'WebIDL2 namespace should have a parse method');
     test(function() {
-        assert_throws(new TypeError(), function() {  WebIDL2.parse("I'm a syntax error"); });
+        try {
+            WebIDL2.parse("I'm a syntax error");
+            throw new Error("Web IDL didn't throw");
+        } catch (e) {
+            assert_true(e.constructor.name === "WebIDLParseError");
+        }
     }, 'WebIDL2 parse method should bail on incorrect WebIDL');
     test(function() {
         assert_equals(typeof WebIDL2.parse("interface Foo {};"), "object");