Language/Expressions/Maps/runtime_map_t03.dart

// Copyright (c) 2011, 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.

/// @assertion A runtime map literal <K, V>{k1: e1...kn: en} is evaluated as
/// follows:
/// • First, the expression ki is evaluated yielding object ui, the ei is
///   evaluated yielding object oi, for i ∈ 1..n in left to right order, yielding
///    objects u1; o1 ... un; on.
/// • A fresh instance m whose class implements the built-in class Map<K, V> is
///   allocated.
/// • The operator []= is invoked on m with first argument ui and second argument
///   oi, i ∈ 1..n.
/// • The result of the evaluation is m.
/// @description Checks that entries with keys ui and values oi are added to the
/// resulted map object.
/// @author msyabro

import '../../../Utils/expect.dart';

main() {
  var m = {"k1": 1, "k2": 2, "k3": 3, "k4": "4"};
  Expect.isTrue(m.containsKey("k1"));
  Expect.equals(1, m["k1"]);
  Expect.isTrue(m.containsKey("k2"));
  Expect.equals(2, m["k2"]);
  Expect.isTrue(m.containsKey("k3"));
  Expect.equals(3, m["k3"]);
  Expect.isTrue(m.containsKey("k4"));
  Expect.equals("4", m["k4"]);

  m = {};
  Expect.isTrue(m.isEmpty);

  m = <String, bool>{"true": 1 > 2, "false": true || false};
  Expect.isTrue(m.containsKey("true"));
  Expect.equals(false, m["true"]);
  Expect.isTrue(m.containsKey("false"));
  Expect.equals(true, m["false"]);

  var x = 1;
  var y = 2;
  m = {"$x": 1, "$y": 2};
  Expect.isTrue(m.containsKey("1"));
  Expect.equals(1, m["1"]);
  Expect.isTrue(m.containsKey("2"));
  Expect.equals(2, m["2"]);
}