Migrated test block 14 to Dart 2.0.

tests/corelib_strong/list_reversed_test.dart

-// 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() {
-  testOperations();
-}
-
-class ThrowMarker {
-  const ThrowMarker();
-  String toString() => "<<THROWS>>";
-}
-
-void testOperations() {
-  // Comparison lists.
-  var l = const [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
-  var r = const [10, 9, 8, 7, 6, 5, 4, 3, 2, 1];
-  // A base list that starts out like l.
-  var base = l.toList();
-  // A lazy reverse of base.
-  var reversed = base.reversed;
-
-  Expect.listEquals(r, reversed.toList());
-  Expect.listEquals(l, reversed.toList().reversed.toList());
-  for (int i = 0; i < r.length; i++) {
-    Expect.equals(r[i], reversed.elementAt(i));
-  }
-  Expect.equals(4, base.indexOf(5));
-  Expect.equals(5, reversed.toList().indexOf(5));
-
-  // Reversed followed by combinations of skip and take.
-  List subr = [8, 7, 6, 5, 4, 3];
-  Expect.listEquals(subr, reversed.skip(2).take(6).toList());
-  Expect.listEquals(subr, reversed.take(8).skip(2).toList());
-  Expect.listEquals(subr,
-      reversed.toList().reversed.skip(2).take(6).toList().reversed.toList());
-  Expect.listEquals(subr,
-      reversed.toList().reversed.take(8).skip(2).toList().reversed.toList());
-  Expect.listEquals(subr,
-      reversed.take(8).toList().reversed.take(6).toList().reversed.toList());
-  Expect.listEquals(subr,
-      reversed.toList().reversed.take(8).toList().reversed.take(6).toList());
-  Expect.listEquals(subr,
-      reversed.toList().reversed.skip(2).toList().reversed.skip(2).toList());
-  Expect.listEquals(subr,
-      reversed.skip(2).toList().reversed.skip(2).toList().reversed.toList());
-
-  void testList(List<int> list) {
-    var throws = const ThrowMarker();
-    void testEquals(v1, v2, path) {
-      if (v1 is Iterable) {
-        Iterator i1 = v1.iterator;
-        Iterator i2 = v2.iterator;
-        int index = 0;
-        while (i1.moveNext()) {
-          Expect.isTrue(i2.moveNext(),
-              "Too few actual values. Expected[$index] == ${i1.current}");
-          testEquals(i1.current, i2.current, "$path[$index]");
-          index++;
-        }
-        if (i2.moveNext()) {
-          Expect
-              .fail("Too many actual values. Actual[$index] == ${i2.current}");
-        }
-      } else {
-        Expect.equals(v1, v2, path);
-      }
-    }
-
-    void testOp(operation(Iterable<int> reversedList), name) {
-      var reversedList = new List<int>(list.length);
-      for (int i = 0; i < list.length; i++) {
-        reversedList[i] = list[list.length - 1 - i];
-      }
-      var reversed = list.reversed;
-      var expect;
-      try {
-        expect = operation(reversedList);
-      } catch (e) {
-        expect = throws;
-      }
-      var actual;
-      try {
-        actual = operation(reversed);
-      } catch (e) {
-        actual = throws;
-      }
-      testEquals(expect, actual, "$name: $list");
-    }
-
-    testOp((i) => i.first, "first");
-    testOp((i) => i.last, "last");
-    testOp((i) => i.single, "single");
-    testOp((i) => i.firstWhere((n) => n < 5), "firstWhere<5");
-    testOp((i) => i.firstWhere((n) => n < 10), "firstWhere<10");
-    testOp((i) => i.lastWhere((n) => n < 5), "lastWhere<5");
-    testOp((i) => i.lastWhere((n) => n < 10), "lastWhere<10");
-    testOp((i) => i.singleWhere((n) => n < 5), "singelWhere<5");
-    testOp((i) => i.singleWhere((n) => n < 10), "singelWhere<10");
-    testOp((i) => i.contains(5), "contains(5)");
-    testOp((i) => i.contains(10), "contains(10)");
-    testOp((i) => i.any((n) => n < 5), "any<5");
-    testOp((i) => i.any((n) => n < 10), "any<10");
-    testOp((i) => i.every((n) => n < 5), "every<5");
-    testOp((i) => i.every((n) => n < 10), "every<10");
-    testOp((i) => i.reduce((a, b) => a + b), "reduce-sum");
-    testOp((i) => i.fold/*<int>*/(0, (a, b) => a + b), "fold-sum");
-    testOp((i) => i.join("-"), "join-");
-    testOp((i) => i.join(""), "join");
-    testOp((i) => i.join(), "join-null");
-    testOp((i) => i.map((n) => n * 2), "map*2");
-    testOp((i) => i.where((n) => n < 5), "where<5");
-    testOp((i) => i.where((n) => n < 10), "where<10");
-    testOp((i) => i.expand((n) => []), "expand[]");
-    testOp((i) => i.expand((n) => [n]), "expand[n]");
-    testOp((i) => i.expand((n) => [n, n]), "expand[n, n]");
-  }
-
-  // Combinations of lists with 0, 1 and more elements.
-  testList([]);
-  testList([0]);
-  testList([10]);
-  testList([0, 1]);
-  testList([0, 10]);
-  testList([10, 11]);
-  testList([0, 5, 10]);
-  testList([10, 5, 0]);
-  testList([0, 1, 2, 3]);
-  testList([3, 4, 5, 6]);
-  testList([10, 11, 12, 13]);
-
-  // Reverse const list.
-  Expect.listEquals(r, l.reversed.toList());
-}