Implement Object.property.hasOwnProperty

JerryScript-DCO-1.0-Signed-off-by: Peter Gal [email protected]

Author: galpeter

jerry-core/ecma/builtin-objects/ecma-builtin-object-prototype.cpp

@@ -173,7 +173,45 @@ static ecma_completion_value_t
 ecma_builtin_object_prototype_object_has_own_property (ecma_value_t this_arg, /**< this argument */
                                                        ecma_value_t arg) /**< first argument */
 {
-  ECMA_BUILTIN_CP_UNIMPLEMENTED (this_arg, arg);
+  /* 1. ToString(arg) */
+  ecma_completion_value_t property_name_ret = ecma_op_to_string (arg);
+  if (!ecma_is_completion_value_normal (property_name_ret))
+  {
+    return property_name_ret;
+  }
+
+  ecma_string_t *property_name_string_p = ecma_get_string_from_completion_value (property_name_ret);
+
+  /* 2. ToObject(this) */
+  ecma_completion_value_t obj_this = ecma_op_to_object (this_arg);
+  if (!ecma_is_completion_value_normal (obj_this))
+  {
+    ecma_free_completion_value (property_name_ret);
+    return obj_this;
+  }
+
+  ecma_object_t *obj_p = ecma_get_object_from_completion_value (obj_this);
+
+  /* 3. GetOwnProperty call */
+  ecma_property_t *property_p = ecma_op_object_get_own_property (obj_p, property_name_string_p);
+
+  ecma_free_completion_value (property_name_ret);
+  ecma_free_completion_value (obj_this);
+
+  if (property_p == NULL)
+  {
+    return ecma_make_simple_completion_value (ECMA_SIMPLE_VALUE_FALSE);
+  }
+
+  JERRY_ASSERT (property_p->type == ECMA_PROPERTY_NAMEDDATA);
+  ecma_value_t property_value = ecma_get_named_data_property_value (property_p);
+
+  if (ecma_is_value_undefined (property_value))
+  {
+    return ecma_make_simple_completion_value (ECMA_SIMPLE_VALUE_FALSE);
+  }
+
+  return ecma_make_simple_completion_value (ECMA_SIMPLE_VALUE_TRUE);
 } /* ecma_builtin_object_prototype_object_has_own_property */
 
 /**

tests/jerry/object_prototype_hasownproperty.js

@@ -0,0 +1,28 @@
+
+var obj1 = {};
+obj1.prop = "hi";
+
+assert (obj1.hasOwnProperty('prop') === true);
+assert (obj1.hasOwnProperty('NO_PROP') === false);
+
+
+// Test if the toString fails.
+try {
+  obj1.hasOwnProperty({toString: function() { throw new ReferenceError ("foo"); }});
+
+  assert (false);
+} catch (e) {
+  assert (e.message === "foo");
+  assert (e instanceof ReferenceError);
+}
+
+// Test if the toObject fails.
+
+var obj2;
+try {
+  print(obj2.hasOwnProperty("fail"));
+
+  assert (false);
+} catch (e) {
+  assert (e instanceof TypeError);
+}