tests/corelib/iterable_tostring_test.dart - Issue 2996513002: Migrated test block 12 to Dart 2.0.

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Issue 2996513002: Migrated test block 12 to Dart 2.0. (Closed)

Patch Set: Created 3 years, 4 months ago

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1 // Copyright (c) 2013, 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 // Test the IterableBase/IterableMixin toString method.

6

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

8 import "dart:collection";

9

10 String mkIt(int len, [func]) {

11 var list;

12 if (func == null) {

13 list = new List.generate(len, (x) => x);

14 } else {

15 list = new List.generate(len, func);

16 }

17 return new MyIterable(list).toString();

18 }

19

20 class MyIterable extends IterableBase {

21 final Iterable _base;

22 MyIterable(this._base);

23 Iterator get iterator => _base.iterator;

24 }

25

26 void main() {

27 Expect.equals("()", mkIt(0));

28 Expect.equals("(0)", mkIt(1));

29 Expect.equals("(0, 1)", mkIt(2));

30 Expect.equals("(0, 1, 2, 3, 4, 5, 6, 7, 8)", mkIt(9));

31

32 // Builds string up to 60 characters, then finishes with last two

33 // elements.

34 Expect.equals(

35 //0123456789012345678901234567890123456789 - 40 characters

36 "(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 1"

37 "2, 13, 14, 15, 16, 17, 18, ..., 98, 99)",

38 mkIt(100));

39

40 Expect.equals(

41 //0123456789012345678901234567890123456789

42 "(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 1"

43 "2, 13, 14, 15, 16, 17, 18)",

44 mkIt(19));

45

46 Expect.equals(

47 //0123456789012345678901234567890123456789

48 "(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 1"

49 "2, 13, 14, 15, 16, 17, 18, 19)",

50 mkIt(20));

51

52 Expect.equals(

53 //0123456789012345678901234567890123456789

54 "(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 1"

55 "2, 13, 14, 15, 16, 17, 18, 19, 20)",

56 mkIt(21));

57

58 // Don't show last two elements if more than 100 elements total

59 // (can't be 100 elements in 80 characters including commas).

60 Expect.equals(

61 //0123456789012345678901234567890123456789

62 "(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 1"

63 "2, 13, 14, 15, 16, 17, 18, 19, 20, ...)",

64 mkIt(101));

65

66 // If last two elements bring total over 80 characters, drop some of

67 // the previous ones as well.

68

69 Expect.equals(

70 //0123456789012345678901234567890123456789

71 "(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 1"

72 "2, 13, ..., 18, xxxxxxxxxxxxxxxxxxxx)",

73 mkIt(20, (x) => x == 19 ? "xxxxxxxxxxxxxxxxxxxx" : "$x"));

74

75 // Never drop the first three or the last two.

76 Expect.equals(

77 //0123456789012345678901234567890123456789

78 "(xxxxxxxxxxxxxxxxx, xxxxxxxxxxxxxxxxx, x"

79 "xxxxxxxxxxxxxxxx, ..., 18, xxxxxxxxxxxxx"

80 "xxxx)",

81 mkIt(20, (x) => (x < 3 \|\| x == 19) ? "xxxxxxxxxxxxxxxxx" : "$x"));

82

83 // Never drop the first three or the last two.

84 Expect.equals(

85 //0123456789012345678901234567890123456789

86 "(xxxxxxxxxxxxxxxxx, xxxxxxxxxxxxxxxxx, x"

87 "xxxxxxxxxxxxxxxx, ..., xxxxxxxxxxxxxxxxx"

88 ", 19)",

89 mkIt(20, (x) => (x < 3 \|\| x == 18) ? "xxxxxxxxxxxxxxxxx" : "$x"));

90

91 // If the first three are very long, always include them anyway.

92 Expect.equals(

93 //0123456789012345678901234567890123456789

94 "(xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx,"

95 " xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx,"

96 " xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx,"

97 " ..., 98, 99)",

98 mkIt(100,

99 (x) => (x < 3) ? "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" : "$x"));

100

101 Expect.equals(

102 //0123456789012345678901234567890123456789

103 "(, , , , , , , , , , , , , , , , , , , ,"

104 " , , , , , , , , , , , , , , , ..., , )",

105 mkIt(100, (_) => ""));

106 }

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