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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 var myIdentical = identical; | 5 var myIdentical = identical; |
6 | 6 |
7 class Point { | 7 class Point { |
8 num x, y; | 8 num x, y; |
9 Point(this.x, this.y); | 9 Point(this.x, this.y); |
10 } | 10 } |
11 | 11 |
12 main() { | 12 main() { |
13 // Smi. | 13 // int. |
14 Expect.isTrue(myIdentical(42, 42)); | 14 Expect.isTrue(myIdentical(42, 42)); |
15 Expect.isFalse(myIdentical(42, 41)); | 15 Expect.isFalse(myIdentical(42, 41)); |
16 | 16 |
17 // Double. | 17 // double. |
18 Expect.isTrue(myIdentical(42.0, 42.0)); | 18 Expect.isTrue(myIdentical(42.0, 42.0)); |
19 Expect.isFalse(myIdentical(42.0, 41.0)); | 19 Expect.isFalse(myIdentical(42.0, 41.0)); |
20 | 20 |
21 // Mint (2^45). | 21 // Mint (2^45). |
22 Expect.isTrue(myIdentical(35184372088832,35184372088832)); | 22 Expect.isTrue(myIdentical(35184372088832,35184372088832)); |
23 Expect.isFalse(myIdentical(35184372088832,35184372088831)); | 23 Expect.isFalse(myIdentical(35184372088832,35184372088831)); |
24 | 24 |
25 // Bigint (2^76). | |
26 Expect.isTrue(myIdentical(75557863725914323419136, | |
27 75557863725914323419136)); | |
28 Expect.isFalse(myIdentical(75557863725914323419136, | |
29 75557863725914323419137)); | |
30 | |
31 // Different types. | 25 // Different types. |
32 Expect.isFalse(myIdentical(42, 42.0)); | |
33 Expect.isFalse(myIdentical("hello", 41)); | 26 Expect.isFalse(myIdentical("hello", 41)); |
34 | 27 |
35 // Points. | 28 // Points. |
36 var p = new Point(1,1); | 29 var p = new Point(1,1); |
37 var q = new Point(1,1); | 30 var q = new Point(1,1); |
38 Expect.isFalse(myIdentical(p, q)); | 31 Expect.isFalse(myIdentical(p, q)); |
39 | 32 |
40 // Strings. | 33 // Strings. |
41 var a = "hello"; | 34 var a = "hello"; |
42 var b = "hello"; | 35 var b = "hello"; |
43 // Identical strings are coalesced into single instances. | 36 // Identical strings are coalesced into single instances. |
44 Expect.isTrue(myIdentical(a, b)); | 37 Expect.isTrue(myIdentical(a, b)); |
45 | 38 |
46 // Null and NaN handling. | 39 // Null handling. |
47 Expect.isFalse(myIdentical(42, null)); | 40 Expect.isFalse(myIdentical(42, null)); |
48 Expect.isTrue(myIdentical(null, null)); | 41 Expect.isTrue(myIdentical(null, null)); |
49 Expect.isTrue(myIdentical(double.NAN, double.NAN)); | 42 } |
50 } | |
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