| // Copyright (c) 2013, 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() { |
| bool checkedMode = false; |
| assert((checkedMode = true)); |
| void test(expectedList, generatedIterable) { |
| Expect.equals(expectedList.length, generatedIterable.length); |
| Expect.listEquals(expectedList, generatedIterable.toList()); |
| } |
| |
| test([], new Iterable.generate(0)); |
| test([0], new Iterable.generate(1)); |
| test([0, 1, 2, 3, 4], new Iterable.generate(5)); |
| test(["0", "1", "2", "3", "4"], new Iterable.generate(5, (x) => "$x")); |
| test([2, 3, 4, 5, 6], new Iterable.generate(7).skip(2)); |
| test([0, 1, 2, 3, 4], new Iterable.generate(7).take(5)); |
| test([], new Iterable.generate(5).skip(6)); |
| test([], new Iterable.generate(5).take(0)); |
| test([], new Iterable.generate(5).take(3).skip(3)); |
| test([], new Iterable.generate(5).skip(6).take(0)); |
| |
| // Test types. |
| |
| Iterable<int> it = new Iterable<int>.generate(5); |
| Expect.isTrue(it is Iterable<int>); |
| Expect.isTrue(it.iterator is Iterator<int>); |
| Expect.isTrue(it is! Iterable<String>); |
| Expect.isTrue(it.iterator is! Iterator<String>); |
| test([0, 1, 2, 3, 4], it); |
| |
| Iterable<String> st = new Iterable<String>.generate(5, (x) => "$x"); |
| Expect.isTrue(st is Iterable<String>); |
| Expect.isTrue(st.iterator is Iterator<String>); |
| Expect.isFalse(st is Iterable<int>); |
| Expect.isFalse(st.iterator is Iterator<int>); |
| test(["0", "1", "2", "3", "4"], st); |
| |
| if (checkedMode) { |
| Expect.throws(() => new Iterable<String>.generate(5)); |
| } |
| } |