JS: polyfill ArrayBuffer.isView in order to support PhantomJS

js/js.libraries/src/js/polyfills.js

@@ -31,3 +31,9 @@ if (typeof String.prototype.endsWith === "undefined") {
         return lastIndex !== -1 && lastIndex === position;
     };
 }
+// For HtmlUnit and PhantomJs
+if (typeof ArrayBuffer.isView === "undefined") {
+    ArrayBuffer.isView = function(a) {
+        return a != null && a.__proto__ != null && a.__proto__.__proto__ === Int8Array.prototype.__proto__;
+    };
+}

libraries/tools/kotlin-js-tests/src/test/web/index.html

@@ -10,13 +10,6 @@
     <script src="../../../target/js/lib/kotlin.js"></script>
     <script src="../../../target/js/lib/kotlin-test-js.js"></script>
     <script src="../../../target/js/kotlin-js-tests.js"></script>
-    <script> // Polyfill for a missing HtmlUnit method
-        if (!ArrayBuffer.isView) {
-            ArrayBuffer.isView = function () {
-                return false;
-            }
-        }
-    </script>
 
     <script src="deepEqual.js"></script>
     <script src="swarminject.js"></script>