tests/corelib_strong/set_iterator_test.dart - Issue 2987773002: Migrated test block 25 to Dart 2.0.

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Issue 2987773002: Migrated test block 25 to Dart 2.0. (Closed)

Patch Set: Removed changes to migrate_batch.dart 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 class FixedHashCode {

8 final int _hashCode;

9 const FixedHashCode(this._hashCode);

10 int get hashCode {

11 return _hashCode;

12 }

13 }

14

15 class SetIteratorTest {

16 static testMain() {

17 testSmallSet();

18 testLargeSet();

19 testEmptySet();

20 testSetWithDeletedEntries();

21 testBug5116829();

22 testDifferentSizes();

23 testDifferentHashCodes();

24 }

25

26 static int sum(int expected, Iterator<int> it) {

27 int count = 0;

28 while (it.moveNext()) {

29 count += it.current;

30 }

31 Expect.equals(expected, count);

32 }

33

34 static void testSmallSet() {

35 Set<int> set = new Set<int>();

36 set.add(1);

37 set.add(2);

38 set.add(3);

39

40 Iterator<int> it = set.iterator;

41 sum(6, it);

42 Expect.isFalse(it.moveNext());

43 Expect.isNull(it.current);

44 }

45

46 static void testLargeSet() {

47 Set<int> set = new Set<int>();

48 int count = 0;

49 for (int i = 0; i < 100; i++) {

50 count += i;

51 set.add(i);

52 }

53 Iterator<int> it = set.iterator;

54 sum(count, it);

55 Expect.isFalse(it.moveNext());

56 Expect.isNull(it.current);

57 }

58

59 static void testEmptySet() {

60 Set<int> set = new Set<int>();

61 Iterator<int> it = set.iterator;

62 sum(0, it);

63 Expect.isFalse(it.moveNext());

64 Expect.isNull(it.current);

65 }

66

67 static void testSetWithDeletedEntries() {

68 Set<int> set = new Set<int>();

69 for (int i = 0; i < 100; i++) {

70 set.add(i);

71 }

72 for (int i = 0; i < 100; i++) {

73 set.remove(i);

74 }

75 Iterator<int> it = set.iterator;

76 Expect.isFalse(it.moveNext());

77 it = set.iterator;

78 sum(0, it);

79 Expect.isFalse(it.moveNext());

80 Expect.isNull(it.current);

81

82 int count = 0;

83 for (int i = 0; i < 100; i++) {

84 set.add(i);

85 if (i % 2 == 0)

86 set.remove(i);

87 else

88 count += i;

89 }

90 it = set.iterator;

91 sum(count, it);

92 Expect.isFalse(it.moveNext());

93 Expect.isNull(it.current);

94 }

95

96 static void testBug5116829() {

97 // During iteration we skipped slot 0 of the hashset's key list. "A" was

98 // hashed to slot 0 and therefore triggered the bug.

99 Set<String> mystrs = new Set<String>();

100 mystrs.add("A");

101 int seen = 0;

102 for (String elt in mystrs) {

103 seen++;

104 Expect.equals("A", elt);

105 }

106 Expect.equals(1, seen);

107 }

108

109 static void testDifferentSizes() {

110 for (int i = 1; i < 20; i++) {

111 Set set = new Set();

112 int sum = 0;

113 for (int j = 0; j < i; j++) {

114 set.add(j);

115 sum += j;

116 }

117 int count = 0;

118 int controlSum = 0;

119 for (int x in set) {

120 controlSum += x;

121 count++;

122 }

123 Expect.equals(i, count);

124 Expect.equals(sum, controlSum);

125 }

126 }

127

128 static void testDifferentHashCodes() {

129 for (int i = -20; i < 20; i++) {

130 Set set = new Set();

131 var element = new FixedHashCode(i);

132 set.add(element);

133 Expect.equals(1, set.length);

134 bool foundIt = false;

135 for (var x in set) {

136 foundIt = true;

137 Expect.equals(true, identical(x, element));

138 }

139 Expect.equals(true, foundIt);

140 }

141 }

142 }

143

144 main() {

145 SetIteratorTest.testMain();

146 }

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