Robert Nystrom
fc1b1ecc71
Change-Id: Idbcc965a27e9ffeedf5e0a1068b019de4193070f Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/127745 Commit-Queue: Bob Nystrom <rnystrom@google.com> Reviewed-by: Alexander Thomas <athom@google.com>
76 lines
2.1 KiB
Dart
76 lines
2.1 KiB
Dart
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// Test program for map literals.
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import "package:expect/expect.dart";
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class MapLiteralTest {
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static testMain() {
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var map = <dynamic, dynamic>{"a": 1, "b": 2, "c": 3};
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Expect.equals(map.length, 3);
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Expect.equals(map["a"], 1);
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Expect.equals(map["z"], null);
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Expect.equals(map["c"], 3);
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map["foo"] = 42;
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Expect.equals(map.length, 4);
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Expect.equals(map["foo"], 42);
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map["foo"] = 55;
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Expect.equals(map.length, 4);
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Expect.equals(map["foo"], 55);
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map.remove("foo");
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Expect.equals(map.length, 3);
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Expect.equals(map["foo"], null);
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map["foo"] = "bar";
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Expect.equals(map.length, 4);
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Expect.equals(map["foo"], "bar");
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map.clear();
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Expect.equals(map.length, 0);
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var b = 22;
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Expect.equals(
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22,
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{
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"a": 11,
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"b": b,
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}["b"]);
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var m = new Map();
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Expect.equals(m.length, 0);
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for (var i = 1; i <= 16; i++) {
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m[i.toString()] = i;
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}
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Expect.equals(16, m.length);
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Expect.equals(1, m.remove("1"));
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Expect.isNull(m.remove("1")); // Remove element twice.
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Expect.equals(16, m.remove("16"));
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Expect.equals(14, m.length);
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final cmap = const <String, num>{"a": 10, "b": 100, "a": 1000}; //# 01: compile-time error
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final cmap2 = const <String, num>{"a": 10, "a": 100, "a": 1000}; //# 02: compile-time error
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var mmap = <String, num>{"a": 10, "b": 100, "a": 1000}; //# 03: ok
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var mmap = <String, num>{"a": ctr(), "b": ctr(), "a": ctr()}; //# 04: compile-time error
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Expect.equals(10, {"beta": 100, "alpha": 9 + 1}["alpha"]);
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Expect.equals(
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10,
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<String, Map>{
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"beta": {"delta": 10},
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"alpha": {"gamma": 10}
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}["alpha"]["gamma"]);
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// Map literals at beginning of statement.
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<String, num>{"pink": 100};
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const <String, num>{"floyd": 100};
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}
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}
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main() {
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MapLiteralTest.testMain();
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}
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