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26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28// Tests the Object.freeze and Object.isFrozen methods - ES 15.2.3.9 and
29// ES 15.2.3.12
30
31
32// Test that we throw an error if an object is not passed as argument.
33var non_objects = new Array(undefined, null, 1, -1, 0, 42.43);
34for (var key in non_objects) {
35  var exception = false;
36  try {
37    Object.freeze(non_objects[key]);
38  } catch(e) {
39    exception = true;
40    assertTrue(/Object.freeze called on non-object/.test(e));
41  }
42  assertTrue(exception);
43}
44
45for (var key in non_objects) {
46  exception = false;
47  try {
48    Object.isFrozen(non_objects[key]);
49  } catch(e) {
50    exception = true;
51    assertTrue(/Object.isFrozen called on non-object/.test(e));
52  }
53  assertTrue(exception);
54}
55
56// Test normal data properties.
57var obj = { x: 42, z: 'foobar' };
58var desc = Object.getOwnPropertyDescriptor(obj, 'x');
59assertTrue(desc.writable);
60assertTrue(desc.configurable);
61assertEquals(42, desc.value);
62
63desc = Object.getOwnPropertyDescriptor(obj, 'z');
64assertTrue(desc.writable);
65assertTrue(desc.configurable);
66assertEquals('foobar', desc.value);
67
68assertTrue(Object.isExtensible(obj));
69assertFalse(Object.isFrozen(obj));
70
71Object.freeze(obj);
72
73// Make sure we are no longer extensible.
74assertFalse(Object.isExtensible(obj));
75assertTrue(Object.isFrozen(obj));
76
77obj.foo = 42;
78assertEquals(obj.foo, undefined);
79
80desc = Object.getOwnPropertyDescriptor(obj, 'x');
81assertFalse(desc.writable);
82assertFalse(desc.configurable);
83assertEquals(42, desc.value);
84
85desc = Object.getOwnPropertyDescriptor(obj, 'z');
86assertFalse(desc.writable);
87assertFalse(desc.configurable);
88assertEquals("foobar", desc.value);
89
90// Make sure that even if we try overwrite a value that is not writable, it is
91// not changed.
92obj.x = "tete";
93assertEquals(42, obj.x);
94obj.x = { get: function() {return 43}, set: function() {} };
95assertEquals(42, obj.x);
96
97// Test on accessors.
98var obj2 = {};
99function get() { return 43; };
100function set() {};
101Object.defineProperty(obj2, 'x', { get: get, set: set, configurable: true });
102
103desc = Object.getOwnPropertyDescriptor(obj2, 'x');
104assertTrue(desc.configurable);
105assertEquals(undefined, desc.value);
106assertEquals(set, desc.set);
107assertEquals(get, desc.get);
108
109assertTrue(Object.isExtensible(obj2));
110assertFalse(Object.isFrozen(obj2));
111Object.freeze(obj2);
112assertTrue(Object.isFrozen(obj2));
113assertFalse(Object.isExtensible(obj2));
114
115desc = Object.getOwnPropertyDescriptor(obj2, 'x');
116assertFalse(desc.configurable);
117assertEquals(undefined, desc.value);
118assertEquals(set, desc.set);
119assertEquals(get, desc.get);
120
121obj2.foo = 42;
122assertEquals(obj2.foo, undefined);
123
124
125// Test freeze on arrays.
126var arr = new Array(42,43);
127
128desc = Object.getOwnPropertyDescriptor(arr, '0');
129assertTrue(desc.configurable);
130assertTrue(desc.writable);
131assertEquals(42, desc.value);
132
133desc = Object.getOwnPropertyDescriptor(arr, '1');
134assertTrue(desc.configurable);
135assertTrue(desc.writable);
136assertEquals(43, desc.value);
137
138assertTrue(Object.isExtensible(arr));
139assertFalse(Object.isFrozen(arr));
140Object.freeze(arr);
141assertTrue(Object.isFrozen(arr));
142assertFalse(Object.isExtensible(arr));
143
144desc = Object.getOwnPropertyDescriptor(arr, '0');
145assertFalse(desc.configurable);
146assertFalse(desc.writable);
147assertEquals(42, desc.value);
148
149desc = Object.getOwnPropertyDescriptor(arr, '1');
150assertFalse(desc.configurable);
151assertFalse(desc.writable);
152assertEquals(43, desc.value);
153
154arr[0] = 'foo';
155
156assertEquals(arr[0], 42);
157
158
159// Test that isFrozen return the correct value even if configurable has been set
160// to false on all properties manually and the extensible flag has also been set
161// to false manually.
162var obj3 = { x: 42, y: 'foo' };
163
164assertFalse(Object.isFrozen(obj3));
165
166Object.defineProperty(obj3, 'x', {configurable: false, writable: false});
167Object.defineProperty(obj3, 'y', {configurable: false, writable: false});
168Object.preventExtensions(obj3);
169
170assertTrue(Object.isFrozen(obj3));
171
172
173// Make sure that an object that has only non-configurable, but one
174// writable property, is not classified as frozen.
175var obj4 = {};
176Object.defineProperty(obj4, 'x', {configurable: false, writable: true});
177Object.defineProperty(obj4, 'y', {configurable: false, writable: false});
178Object.preventExtensions(obj4);
179
180assertFalse(Object.isFrozen(obj4));
181
182// Make sure that an object that has only non-writable, but one
183// configurable property, is not classified as frozen.
184var obj5 = {};
185Object.defineProperty(obj5, 'x', {configurable: true, writable: false});
186Object.defineProperty(obj5, 'y', {configurable: false, writable: false});
187Object.preventExtensions(obj5);
188
189assertFalse(Object.isFrozen(obj5));
190
191// Make sure that Object.freeze returns the frozen object.
192var obj6 = {}
193assertTrue(obj6 === Object.freeze(obj6))
194