Language/Expressions/Strings/String_Interpolation/single_quote_t01.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  An interpolated string 's1${e}s2' is equivalent to the
 * concatenation of the strings 's1', e.toString() and 's2'.
 * @description Checks that an interpolated string ‘s1${e}s2’ is equivalent to
 * the concatenation of the strings 's1', e.toString() and 's2'.
 * @author msyabro
 */
import '../../../../Utils/expect.dart';

func() {return "str";}

main() {
  StringBuffer buffer = new StringBuffer();

  buffer.write('List ');
  buffer.write([]);
  Expect.equals(buffer.toString(), 'List ${[]}');

  buffer.clear();
  buffer.write('Number ');
  buffer.write(1 + 1);
  Expect.equals(buffer.toString(), 'Number ${1 + 1}');

  buffer.clear();
  buffer.write('Result is ');
  buffer.write(func());
  buffer.write(' string');
  Expect.equals(buffer.toString(), 'Result is ${func()} string');

  buffer.clear();
  buffer.write('!false is ');
  buffer.write(!false);
  Expect.equals(buffer.toString(), '!false is ${!false}');

  buffer.clear();
  buffer.write(2);
  buffer.write(' is greater than ');
  buffer.write(1);
  Expect.equals(buffer.toString(), '${2} is greater than ${1}');

  buffer.clear();
  buffer.write(3 - 2);
  buffer.write(1 * 2);
  Expect.equals(buffer.toString(), '${3 - 2}${1 * 2}');

  buffer.clear();
  buffer.write("a");
  buffer.write(' b c');
  Expect.equals(buffer.toString(), '${"a"} b c');

  buffer.clear();
  buffer.write(1);
  buffer.write(2);
  Expect.equals(buffer.toString(), '${'${1}' '${2}'}');
}