Adding a regression test of writing of hash entries in strict mode.

Author: iamstolis

graal-js/src/com.oracle.truffle.js.test/js/github_graaljs_522.js

@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2021, 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Licensed under the Universal Permissive License v 1.0 as shown at http://oss.oracle.com/licenses/upl.
+ */
+
+// Tests writing of hash/map entries. It used to throw TypeError
+// in strict mode, see https://github.com/oracle/graaljs/issues/522
+
+load('assert.js');
+
+assertSame(42, (function() {
+    var map = new java.util.HashMap();
+    map.x = 42;
+    return map.x;
+})());
+
+assertSame(43, (function() {
+    var map = new java.util.HashMap();
+    map['x'] = 43;
+    return map['x'];
+})());
+
+assertSame(44, (function() {
+    "use strict";
+    var map = new java.util.HashMap();
+    map.x = 44;
+    return map.x;
+})());
+
+assertSame(45, (function() {
+    "use strict";
+    var map = new java.util.HashMap();
+    map['x'] = 45;
+    return map['x'];
+})());