tests/corelib/nan_infinity_test.dart - Issue 2987203002: Migrated test block 17 to Dart 2.0.

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Issue 2987203002: Migrated test block 17 to Dart 2.0. (Closed)

Patch Set: Removed tests that are no longer useful for Dart 2.0 Created 3 years, 4 months ago

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1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file

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.

4

5 import "package:expect/expect.dart";

6

7 // Dart test program for testing NaN and Infinity.

8

9 void main() {

10 // Sanity tests.

11 Expect.isFalse(1.5.isNaN);

12 Expect.isFalse(1.5.isInfinite);

13 Expect.isTrue(1.5.isFinite);

14 Expect.isFalse(1.5.isNegative);

15 Expect.isTrue((-1.5).isNegative);

16 Expect.isFalse(0.0.isNegative);

17 Expect.isTrue((-0.0).isNegative);

18 Expect.isTrue((-0.0).isFinite);

19

20 Expect.isFalse(1.isNaN);

21 Expect.isFalse(1.isInfinite);

22 Expect.isTrue(1.isFinite);

23 Expect.isFalse(1.isNegative);

24 Expect.isTrue((-1).isNegative);

25

26 // Test that predicates give the correct result.

27 Expect.isTrue(double.NAN.isNaN);

28 Expect.isFalse(double.NAN.isInfinite);

29 Expect.isFalse(double.NAN.isFinite);

30 Expect.isFalse(double.NAN.isNegative);

31 Expect.isFalse((-double.NAN).isNegative);

32

33 Expect.isFalse(double.INFINITY.isNaN);

34 Expect.isTrue(double.INFINITY.isInfinite);

35 Expect.isFalse(double.INFINITY.isFinite);

36 Expect.isFalse(double.INFINITY.isNegative);

37 Expect.isTrue((-double.INFINITY).isNegative);

38

39 Expect.isFalse(double.NEGATIVE_INFINITY.isNaN);

40 Expect.isTrue(double.NEGATIVE_INFINITY.isInfinite);

41 Expect.isFalse(double.NEGATIVE_INFINITY.isFinite);

42 Expect.isTrue(double.NEGATIVE_INFINITY.isNegative);

43 Expect.isFalse((-double.NEGATIVE_INFINITY).isNegative);

44

45 // Test toString.

46 Expect.equals("NaN", double.NAN.toString());

47 Expect.equals("Infinity", double.INFINITY.toString());

48 Expect.equals("-Infinity", double.NEGATIVE_INFINITY.toString());

49

50 // Test identities.

51 Expect.isTrue(identical(double.NAN, double.NAN)); // //# 01: ok

52 Expect.isTrue(identical(double.INFINITY, double.INFINITY));

53 Expect.isTrue(identical(double.NEGATIVE_INFINITY, double.NEGATIVE_INFINITY));

54 Expect.isFalse(identical(double.NAN, double.INFINITY));

55 Expect.isFalse(identical(double.NAN, double.NEGATIVE_INFINITY));

56 Expect.isFalse(identical(double.INFINITY, double.NEGATIVE_INFINITY));

57 Expect.isFalse(identical(double.NAN, -double.NAN));

58 Expect.isTrue(identical(double.INFINITY, -double.NEGATIVE_INFINITY));

59 Expect.isTrue(identical(double.NEGATIVE_INFINITY, -double.INFINITY));

60

61 // Test equalities

62 Expect.isTrue(double.INFINITY == double.INFINITY);

63 Expect.isTrue(double.NEGATIVE_INFINITY == double.NEGATIVE_INFINITY);

64 Expect.isFalse(double.INFINITY == double.NEGATIVE_INFINITY);

65 Expect.isFalse(double.NEGATIVE_INFINITY == double.INFINITY);

66 Expect.isFalse(double.NAN == double.NAN);

67 Expect.isFalse(double.NAN == double.INFINITY);

68 Expect.isFalse(double.NAN == double.NEGATIVE_INFINITY);

69 Expect.isFalse(double.INFINITY == double.NAN);

70 Expect.isFalse(double.NEGATIVE_INFINITY == double.NAN);

71

72 // Test relational order.

73 Expect.isFalse(double.NAN < double.NAN);

74 Expect.isFalse(double.NAN < double.INFINITY);

75 Expect.isFalse(double.NAN < double.NEGATIVE_INFINITY);

76 Expect.isFalse(double.NAN > double.NAN);

77 Expect.isFalse(double.NAN > double.INFINITY);

78 Expect.isFalse(double.NAN > double.NEGATIVE_INFINITY);

79 Expect.isFalse(double.INFINITY < double.NAN);

80 Expect.isFalse(double.NEGATIVE_INFINITY < double.NAN);

81 Expect.isFalse(double.INFINITY > double.NAN);

82 Expect.isFalse(double.NEGATIVE_INFINITY > double.NAN);

83 Expect.isTrue(double.INFINITY > double.NEGATIVE_INFINITY);

84 Expect.isFalse(double.INFINITY < double.NEGATIVE_INFINITY);

85

86 // NaN is contagious.

87 Expect.isTrue((3.0 * double.NAN).isNaN);

88 Expect.isTrue((3.0 + double.NAN).isNaN);

89 Expect.isTrue((-double.NAN).isNaN);

90 }

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