Index: test/codegen/corelib/iterable_skip_test.dart |
diff --git a/test/codegen/corelib/iterable_skip_test.dart b/test/codegen/corelib/iterable_skip_test.dart |
new file mode 100644 |
index 0000000000000000000000000000000000000000..59d604dbf6c5328e0b953a1ba48195e387741052 |
--- /dev/null |
+++ b/test/codegen/corelib/iterable_skip_test.dart |
@@ -0,0 +1,259 @@ |
+// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
+// for details. All rights reserved. Use of this source code is governed by a |
+// BSD-style license that can be found in the LICENSE file. |
+ |
+import "package:expect/expect.dart"; |
+ |
+main() { |
+ List<int> list1 = <int>[1, 2, 3]; |
+ List<int> list2 = const <int>[4, 5]; |
+ List<String> list3 = <String>[]; |
+ Set<int> set1 = new Set<int>(); |
+ set1..add(11) |
+ ..add(12) |
+ ..add(13); |
+ Set set2 = new Set(); |
+ |
+ Iterable<int> skip0 = list1.skip(0); |
+ Expect.isTrue(skip0 is! List); |
+ Iterator<int> it = skip0.iterator; |
+ Expect.isNull(it.current); |
+ Expect.isTrue(it.moveNext()); |
+ Expect.equals(1, it.current); |
+ Expect.isTrue(it.moveNext()); |
+ Expect.equals(2, it.current); |
+ Expect.isTrue(it.moveNext()); |
+ Expect.equals(3, it.current); |
+ Expect.isFalse(it.moveNext()); |
+ Expect.isNull(it.current); |
+ |
+ Iterable<int> skip1 = list1.skip(1); |
+ Expect.isTrue(skip1 is! List); |
+ Expect.isTrue(skip1.skip(2).skip(1) is! List); |
+ it = skip1.iterator; |
+ Expect.isNull(it.current); |
+ Expect.isTrue(it.moveNext()); |
+ Expect.equals(2, it.current); |
+ Expect.isTrue(it.moveNext()); |
+ Expect.equals(3, it.current); |
+ Expect.isFalse(it.moveNext()); |
+ Expect.isNull(it.current); |
+ |
+ Iterable<int> skip2 = list1.skip(2); |
+ Expect.isTrue(skip2 is! List); |
+ Expect.isTrue(skip2.skip(2).skip(1) is! List); |
+ it = skip2.iterator; |
+ Expect.isNull(it.current); |
+ Expect.isTrue(it.moveNext()); |
+ Expect.equals(3, it.current); |
+ Expect.isFalse(it.moveNext()); |
+ Expect.isNull(it.current); |
+ |
+ Iterable<int> skip3 = list1.skip(3); |
+ Expect.isTrue(skip3 is! List); |
+ Expect.isTrue(skip3.skip(2).skip(1) is! List); |
+ it = skip3.iterator; |
+ Expect.isNull(it.current); |
+ Expect.isFalse(it.moveNext()); |
+ Expect.isNull(it.current); |
+ |
+ Iterable<int> skip4 = list1.skip(4); |
+ Expect.isTrue(skip4 is! List); |
+ Expect.isTrue(skip4.skip(2).skip(1) is! List); |
+ it = skip4.iterator; |
+ Expect.isNull(it.current); |
+ Expect.isFalse(it.moveNext()); |
+ Expect.isNull(it.current); |
+ |
+ skip0 = list1.skip(0); |
+ skip1 = skip0.skip(1); |
+ skip2 = skip1.skip(1); |
+ skip3 = skip2.skip(1); |
+ skip4 = skip3.skip(1); |
+ it = skip0.iterator; |
+ Expect.isNull(it.current); |
+ Expect.isTrue(it.moveNext()); |
+ Expect.equals(1, it.current); |
+ Expect.isTrue(it.moveNext()); |
+ Expect.equals(2, it.current); |
+ Expect.isTrue(it.moveNext()); |
+ Expect.equals(3, it.current); |
+ Expect.isFalse(it.moveNext()); |
+ Expect.isNull(it.current); |
+ it = skip1.iterator; |
+ Expect.isNull(it.current); |
+ Expect.isTrue(it.moveNext()); |
+ Expect.equals(2, it.current); |
+ Expect.isTrue(it.moveNext()); |
+ Expect.equals(3, it.current); |
+ Expect.isFalse(it.moveNext()); |
+ Expect.isNull(it.current); |
+ it = skip2.iterator; |
+ Expect.isNull(it.current); |
+ Expect.isTrue(it.moveNext()); |
+ Expect.equals(3, it.current); |
+ Expect.isFalse(it.moveNext()); |
+ Expect.isNull(it.current); |
+ it = skip3.iterator; |
+ Expect.isNull(it.current); |
+ Expect.isFalse(it.moveNext()); |
+ Expect.isNull(it.current); |
+ it = skip4.iterator; |
+ Expect.isNull(it.current); |
+ Expect.isFalse(it.moveNext()); |
+ Expect.isNull(it.current); |
+ |
+ skip0 = list2.skip(0); |
+ Expect.isTrue(skip0 is! List); |
+ Expect.isTrue(skip0.skip(2).skip(1) is! List); |
+ it = skip0.iterator; |
+ Expect.isNull(it.current); |
+ Expect.isTrue(it.moveNext()); |
+ Expect.equals(4, it.current); |
+ Expect.isTrue(it.moveNext()); |
+ Expect.equals(5, it.current); |
+ Expect.isFalse(it.moveNext()); |
+ Expect.isNull(it.current); |
+ |
+ skip1 = list2.skip(1); |
+ Expect.isTrue(skip1 is! List); |
+ Expect.isTrue(skip1.skip(2).skip(1) is! List); |
+ it = skip1.iterator; |
+ Expect.isNull(it.current); |
+ Expect.isTrue(it.moveNext()); |
+ Expect.equals(5, it.current); |
+ Expect.isFalse(it.moveNext()); |
+ Expect.isNull(it.current); |
+ |
+ skip2 = list2.skip(2); |
+ Expect.isTrue(skip2 is! List); |
+ Expect.isTrue(skip2.skip(2).skip(1) is! List); |
+ it = skip2.iterator; |
+ Expect.isNull(it.current); |
+ Expect.isFalse(it.moveNext()); |
+ Expect.isNull(it.current); |
+ |
+ skip3 = list2.skip(3); |
+ Expect.isTrue(skip3 is! List); |
+ Expect.isTrue(skip3.skip(2).skip(1) is! List); |
+ it = skip3.iterator; |
+ Expect.isNull(it.current); |
+ Expect.isFalse(it.moveNext()); |
+ Expect.isNull(it.current); |
+ |
+ Iterable<String> skip02 = list3.skip(0); |
+ Expect.isTrue(skip02 is! List); |
+ Expect.isTrue(skip02.skip(2).skip(1) is! List); |
+ Iterator<String> it2 = skip02.iterator; |
+ Expect.isNull(it2.current); |
+ Expect.isFalse(it2.moveNext()); |
+ Expect.isNull(it2.current); |
+ |
+ Iterable<String> skip12 = list3.skip(1); |
+ Expect.isTrue(skip12 is! List); |
+ Expect.isTrue(skip12.skip(2).skip(1) is! List); |
+ it2 = skip12.iterator; |
+ Expect.isNull(it2.current); |
+ Expect.isFalse(it2.moveNext()); |
+ Expect.isNull(it2.current); |
+ |
+ skip0 = set1.skip(0); |
+ List<int> copied = skip0.toList(); |
+ Expect.equals(3, copied.length); |
+ Expect.isTrue(set1.contains(copied[0])); |
+ Expect.isTrue(set1.contains(copied[1])); |
+ Expect.isTrue(set1.contains(copied[2])); |
+ Expect.isTrue(copied[0] != copied[1]); |
+ Expect.isTrue(copied[0] != copied[2]); |
+ Expect.isTrue(copied[1] != copied[2]); |
+ it = skip0.iterator; |
+ Expect.isNull(it.current); |
+ Expect.isTrue(it.moveNext()); |
+ Expect.isNotNull(it.current); |
+ Expect.isTrue(it.moveNext()); |
+ Expect.isNotNull(it.current); |
+ Expect.isTrue(it.moveNext()); |
+ Expect.isNotNull(it.current); |
+ Expect.isFalse(it.moveNext()); |
+ Expect.isNull(it.current); |
+ |
+ skip1 = set1.skip(1); |
+ copied = skip1.toList(); |
+ Expect.equals(2, copied.length); |
+ Expect.isTrue(set1.contains(copied[0])); |
+ Expect.isTrue(set1.contains(copied[1])); |
+ Expect.isTrue(copied[0] != copied[1]); |
+ it = skip1.iterator; |
+ Expect.isNull(it.current); |
+ Expect.isTrue(it.moveNext()); |
+ Expect.isNotNull(it.current); |
+ Expect.isTrue(it.moveNext()); |
+ Expect.isNotNull(it.current); |
+ Expect.isFalse(it.moveNext()); |
+ Expect.isNull(it.current); |
+ |
+ skip2 = set1.skip(2); |
+ copied = skip2.toList(); |
+ Expect.equals(1, copied.length); |
+ Expect.isTrue(set1.contains(copied[0])); |
+ it = skip2.iterator; |
+ Expect.isNull(it.current); |
+ Expect.isTrue(it.moveNext()); |
+ Expect.isNotNull(it.current); |
+ Expect.isFalse(it.moveNext()); |
+ Expect.isNull(it.current); |
+ |
+ skip3 = set1.skip(3); |
+ it = skip3.iterator; |
+ Expect.isNull(it.current); |
+ Expect.isFalse(it.moveNext()); |
+ Expect.isNull(it.current); |
+ |
+ skip4 = set1.skip(4); |
+ it = skip4.iterator; |
+ Expect.isNull(it.current); |
+ Expect.isFalse(it.moveNext()); |
+ Expect.isNull(it.current); |
+ |
+ skip0 = set2.skip(0); |
+ it = skip0.iterator; |
+ Expect.isNull(it.current); |
+ Expect.isFalse(it.moveNext()); |
+ Expect.isNull(it.current); |
+ |
+ skip1 = set2.skip(1); |
+ it = skip1.iterator; |
+ Expect.isNull(it.current); |
+ Expect.isFalse(it.moveNext()); |
+ Expect.isNull(it.current); |
+ |
+ testSkipTake(Iterable input, int skip, int take) { |
+ List expected = []; |
+ Iterator iter = input.iterator; |
+ for (int i = 0; i < skip; i++) iter.moveNext(); |
+ for (int i = 0; i < take; i++) { |
+ if (!iter.moveNext()) break; |
+ expected.add(iter.current); |
+ } |
+ Expect.listEquals(expected, input.skip(skip).take(take).toList()); |
+ } |
+ |
+ List longList = [1, 4, 5, 3, 8, 11, 12, 6, 9, 10, 13, 7, 2, 14, 15]; |
+ Set bigSet = longList.toSet(); |
+ |
+ for (Iterable collection in [longList, longList.reversed, bigSet]) { |
+ testSkipTake(collection, 0, 0); |
+ testSkipTake(collection, 0, 5); |
+ testSkipTake(collection, 0, 15); |
+ testSkipTake(collection, 0, 25); |
+ testSkipTake(collection, 5, 0); |
+ testSkipTake(collection, 5, 5); |
+ testSkipTake(collection, 5, 10); |
+ testSkipTake(collection, 5, 20); |
+ testSkipTake(collection, 15, 0); |
+ testSkipTake(collection, 15, 5); |
+ testSkipTake(collection, 20, 0); |
+ testSkipTake(collection, 20, 5); |
+ Expect.throws(() => longList.skip(-1), (e) => e is RangeError); |
+ } |
+} |