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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. | |
14 Expect.isTrue(myIdentical(42, 42)); | |
15 Expect.isFalse(myIdentical(42, 41)); | |
16 | |
17 // Double. | |
18 Expect.isTrue(myIdentical(42.0, 42.0)); | |
19 Expect.isFalse(myIdentical(42.0, 41.0)); | |
20 | |
21 // Mint (2^45). | |
22 Expect.isTrue(myIdentical(35184372088832,35184372088832)); | |
23 Expect.isFalse(myIdentical(35184372088832,35184372088831)); | |
24 | |
25 // Bigint (2^76). | 13 // Bigint (2^76). |
26 Expect.isTrue(myIdentical(75557863725914323419136, | 14 Expect.isTrue(myIdentical(75557863725914323419136, |
27 75557863725914323419136)); | 15 75557863725914323419136)); |
28 Expect.isFalse(myIdentical(75557863725914323419136, | 16 Expect.isFalse(myIdentical(75557863725914323419136, |
29 75557863725914323419137)); | 17 75557863725914323419137)); |
30 | 18 |
31 // Different types. | 19 // Different types. |
32 Expect.isFalse(myIdentical(42, 42.0)); | 20 Expect.isFalse(myIdentical(42, 42.0)); |
33 Expect.isFalse(myIdentical("hello", 41)); | |
34 | 21 |
35 // Points. | 22 // NaN handling. |
36 var p = new Point(1,1); | |
37 var q = new Point(1,1); | |
38 Expect.isFalse(myIdentical(p, q)); | |
39 | |
40 // Strings. | |
41 var a = "hello"; | |
42 var b = "hello"; | |
43 // Identical strings are coalesced into single instances. | |
44 Expect.isTrue(myIdentical(a, b)); | |
45 | |
46 // Null and NaN handling. | |
47 Expect.isFalse(myIdentical(42, null)); | |
48 Expect.isTrue(myIdentical(null, null)); | |
49 Expect.isTrue(myIdentical(double.NAN, double.NAN)); | 23 Expect.isTrue(myIdentical(double.NAN, double.NAN)); |
50 } | 24 } |
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