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