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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 import "package:expect/expect.dart"; | |
6 | |
7 // Dart test for deeply nested generic types. | 5 // Dart test for deeply nested generic types. |
8 | 6 |
9 /** A natural number aka Peano number. */ | 7 /** A natural number aka Peano number. */ |
10 abstract class N { | 8 abstract class N { |
11 N add1(); | 9 N add1(); |
12 N sub1(); | 10 N sub1(); |
13 } | 11 } |
14 | 12 |
15 /** Zero element. */ | 13 /** Zero element. */ |
16 class Z implements N { | 14 class Z implements N { |
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77 Expect.isFalse(IsEven(NFromInt(1))); | 75 Expect.isFalse(IsEven(NFromInt(1))); |
78 Expect.isTrue(IsEven(NFromInt(2))); | 76 Expect.isTrue(IsEven(NFromInt(2))); |
79 Expect.isFalse(IsEven(NFromInt(3))); | 77 Expect.isFalse(IsEven(NFromInt(3))); |
80 Expect.isTrue(IsEven(NFromInt(4))); | 78 Expect.isTrue(IsEven(NFromInt(4))); |
81 | 79 |
82 Expect.equals(0, IntFromN(NFromInt(0))); | 80 Expect.equals(0, IntFromN(NFromInt(0))); |
83 Expect.equals(1, IntFromN(NFromInt(1))); | 81 Expect.equals(1, IntFromN(NFromInt(1))); |
84 Expect.equals(2, IntFromN(NFromInt(2))); | 82 Expect.equals(2, IntFromN(NFromInt(2))); |
85 Expect.equals(50, IntFromN(NFromInt(50))); | 83 Expect.equals(50, IntFromN(NFromInt(50))); |
86 } | 84 } |
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