| test1(dynamic x) { |
| for (var [int y] in x) { |
| if (y % 10 == 0) { |
| return y; |
| } |
| } |
| return -1; |
| } |
| |
| test2(Iterable<List<String>> x) { |
| for (var [..., String y] in x) { |
| if (y.startsWith("f")) { |
| return y; |
| } |
| } |
| return ""; |
| } |
| |
| test3(Iterable<dynamic> x) { |
| for (var [int y, ...] in x) { |
| return y; |
| } |
| return -1; |
| } |
| |
| main() { |
| expectEquals(test1([[1], [2], [3]]), -1); |
| expectEquals(test1([[1], [2], [30]]), 30); |
| expectEquals(test2([["foo", "bar", "baz"], ["bar", "foo", "baz"], ["bar", "baz", "foo"]]), "foo"); |
| expectEquals(test2([]), ""); |
| expectThrows(() => test3([[null, 1, 2]])); |
| expectEquals(test3([]), -1); |
| } |
| |
| expectEquals(x, y) { |
| if (x != y) { |
| throw "Expected '${x}' to be equal to '${y}'."; |
| } |
| } |
| |
| expectThrows(void Function() f) { |
| bool hasThrown = true; |
| try { |
| f(); |
| hasThrown = false; |
| } catch (e) {} |
| if (!hasThrown) { |
| throw "Expected function to throw."; |
| } |
| } |