Implement the core of the map object. (#2447)

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com

tests/jerry/es2015/map.js

@@ -0,0 +1,74 @@
+/* Copyright JS Foundation and other contributors, http://js.foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+var m = new Map();
+assert(m.size == 0);
+assert(m.set(1, 1) === m);
+assert(m.has(1));
+assert(m.size == 1);
+
+assert(m.set(undefined, 123) === m);
+assert(m.size == 2);
+assert(m.has(undefined));
+assert(m.get(undefined) === 123);
+
+assert(m.set(null, 456) === m);
+assert(m.size == 3);
+assert(m.has(null));
+assert(m.get(null) === 456);
+
+assert(m.set("strItem", { x:789 }) === m);
+assert(m.size == 4);
+assert(m.has("str" + "Item"));
+assert(m.get("st" + "rItem").x === 789);
+
+assert(m.set(12.25, 12.25) === m);
+assert(m.size == 5);
+assert(m.has(12 + (function() { return 0.25 })()));
+assert(m.get(13 - (function() { return 0.75 })()) === 12.25);
+
+assert(m.delete(1))
+assert(m.size == 4);
+assert(!m.has(1));
+assert(m.get(1) === undefined);
+
+assert(!m.delete(2));
+
+assert(m.delete(12 + (function() { return 0.25 })()));
+assert(m.size == 3);
+assert(!m.has(12.25));
+assert(m.get(12.25) === undefined);
+
+assert(m.delete("strI" + "tem"))
+assert(m.delete(undefined))
+assert(m.size == 1);
+
+assert(m.delete(null))
+assert(m.size == 0);
+
+m.set(1,1)
+m.set(2,2)
+m.set(3,3)
+m.set(1,7)
+m.set(1,8)
+m.set(2,7)
+m.set(2,8)
+m.set(3,7)
+m.set(3,8)
+
+assert(m.size == 3);
+assert(m.get(1) === 8);
+assert(m.get(2) === 8);
+assert(m.get(3) === 8);