Add Duration.inMicroseconds and add Stopwatch.elapsed.

tests/corelib/duration_test.dart

 // Copyright (c) 2013, 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.
 
 main() {
   Duration d;
   d = new Duration(days: 1);
+  Expect.equals(86400000000, d.inMicroseconds);
   Expect.equals(86400000, d.inMilliseconds);
   Expect.equals(86400, d.inSeconds);
   Expect.equals(1440, d.inMinutes);
   Expect.equals(24, d.inHours);
   Expect.equals(1, d.inDays);
   d = const Duration(hours: 1);
+  Expect.equals(3600000000, d.inMicroseconds);
   Expect.equals(3600000, d.inMilliseconds);
   Expect.equals(3600, d.inSeconds);
   Expect.equals(60, d.inMinutes);
   Expect.equals(1, d.inHours);
   Expect.equals(0, d.inDays);
   d = new Duration(minutes: 1);
+  Expect.equals(60000000, d.inMicroseconds);
   Expect.equals(60000, d.inMilliseconds);
   Expect.equals(60, d.inSeconds);
   Expect.equals(1, d.inMinutes);
   Expect.equals(0, d.inHours);
   Expect.equals(0, d.inDays);
   d = const Duration(seconds: 1);
+  Expect.equals(1000000, d.inMicroseconds);
   Expect.equals(1000, d.inMilliseconds);
   Expect.equals(1, d.inSeconds);
   Expect.equals(0, d.inMinutes);
   Expect.equals(0, d.inHours);
   Expect.equals(0, d.inDays);
   d = new Duration(milliseconds: 1);
+  Expect.equals(1000, d.inMicroseconds);
   Expect.equals(1, d.inMilliseconds);
   Expect.equals(0, d.inSeconds);
   Expect.equals(0, d.inMinutes);
   Expect.equals(0, d.inHours);
   Expect.equals(0, d.inDays);
+  d = new Duration(microseconds: 1);
+  Expect.equals(1, d.inMicroseconds);
+  Expect.equals(0, d.inMilliseconds);
+  Expect.equals(0, d.inSeconds);
+  Expect.equals(0, d.inMinutes);
+  Expect.equals(0, d.inHours);
+  Expect.equals(0, d.inDays);
 
+  d = const Duration(milliseconds: 1, microseconds: 999);
+  Expect.equals(1999, d.inMicroseconds);
+  Expect.equals(1, d.inMilliseconds);
   d = const Duration(seconds: 1, milliseconds: 999);
   Expect.equals(1999, d.inMilliseconds);
   Expect.equals(1, d.inSeconds);
   d = new Duration(minutes: 1, seconds: 59);
   Expect.equals(119, d.inSeconds);
   Expect.equals(1, d.inMinutes);
   d = const Duration(hours: 1, minutes: 59);
   Expect.equals(119, d.inMinutes);
   Expect.equals(1, d.inHours);
   d = new Duration(days: 1, hours:23);
   Expect.equals(47, d.inHours);
   Expect.equals(1, d.inDays);
   d = const Duration(
-      days: 0, hours: 23, minutes: 59, seconds: 59, milliseconds: 999);
+      days: 0, hours: 23, minutes: 59, seconds: 59, milliseconds: 999,
+      microseconds: 999);
   Expect.equals(0, d.inDays);
 
   d = new Duration(days: -1);
+  Expect.equals(-86400000000, d.inMicroseconds);
   Expect.equals(-86400000, d.inMilliseconds);
   Expect.equals(-86400, d.inSeconds);
   Expect.equals(-1440, d.inMinutes);
   Expect.equals(-24, d.inHours);
   Expect.equals(-1, d.inDays);
   d = const Duration(hours: -1);
+  Expect.equals(-3600000000, d.inMicroseconds);
   Expect.equals(-3600000, d.inMilliseconds);
   Expect.equals(-3600, d.inSeconds);
   Expect.equals(-60, d.inMinutes);
   Expect.equals(-1, d.inHours);
   Expect.equals(0, d.inDays);
   d = new Duration(minutes: -1);
+  Expect.equals(-60000000, d.inMicroseconds);
   Expect.equals(-60000, d.inMilliseconds);
   Expect.equals(-60, d.inSeconds);
   Expect.equals(-1, d.inMinutes);
   Expect.equals(0, d.inHours);
   Expect.equals(0, d.inDays);
   d = const Duration(seconds: -1);
+  Expect.equals(-1000000, d.inMicroseconds);
   Expect.equals(-1000, d.inMilliseconds);
   Expect.equals(-1, d.inSeconds);
   Expect.equals(0, d.inMinutes);
   Expect.equals(0, d.inHours);
   Expect.equals(0, d.inDays);
   d = new Duration(milliseconds: -1);
+  Expect.equals(-1000, d.inMicroseconds);
   Expect.equals(-1, d.inMilliseconds);
   Expect.equals(0, d.inSeconds);
   Expect.equals(0, d.inMinutes);
   Expect.equals(0, d.inHours);
   Expect.equals(0, d.inDays);
+  d = new Duration(microseconds: -1);
+  Expect.equals(-1, d.inMicroseconds);
+  Expect.equals(0, d.inMilliseconds);
+  Expect.equals(0, d.inSeconds);
+  Expect.equals(0, d.inMinutes);
+  Expect.equals(0, d.inHours);
+  Expect.equals(0, d.inDays);
 
   d = const Duration(days: 1, hours: -24);
-  Expect.equals(0, d.inMilliseconds);
+  Expect.equals(0, d.inMicroseconds);
   d = new Duration(hours: 1, minutes: -60);
-  Expect.equals(0, d.inMilliseconds);
+  Expect.equals(0, d.inMicroseconds);
   d = const Duration(minutes: 1, seconds: -60);
-  Expect.equals(0, d.inMilliseconds);
+  Expect.equals(0, d.inMicroseconds);
   d = new Duration(seconds: 1, milliseconds: -1000);
-  Expect.equals(0, d.inMilliseconds);
+  Expect.equals(0, d.inMicroseconds);
+  d = new Duration(milliseconds: 1, microseconds: -1000);
+  Expect.equals(0, d.inMicroseconds);
 
   d = const Duration(hours: 25);
   Expect.equals(1, d.inDays);
   Expect.equals(25, d.inHours);
   Expect.equals(1500, d.inMinutes);
   Expect.equals(90000, d.inSeconds);
   Expect.equals(90000000, d.inMilliseconds);
+  Expect.equals(90000000000, d.inMicroseconds);
   d = new Duration(minutes: 61);
   Expect.equals(0, d.inDays);
   Expect.equals(1, d.inHours);
   Expect.equals(61, d.inMinutes);
   Expect.equals(3660, d.inSeconds);
   Expect.equals(3660000, d.inMilliseconds);
+  Expect.equals(3660000000, d.inMicroseconds);
   d = const Duration(seconds: 61);
   Expect.equals(0, d.inDays);
   Expect.equals(0, d.inHours);
   Expect.equals(1, d.inMinutes);
   Expect.equals(61, d.inSeconds);
   Expect.equals(61000, d.inMilliseconds);
+  Expect.equals(61000000, d.inMicroseconds);
   d = new Duration(milliseconds: 1001);
   Expect.equals(0, d.inDays);
   Expect.equals(0, d.inHours);
   Expect.equals(0, d.inMinutes);
   Expect.equals(1, d.inSeconds);
   Expect.equals(1001, d.inMilliseconds);
+  Expect.equals(1001000, d.inMicroseconds);
+  d = new Duration(microseconds: 1001);
+  Expect.equals(0, d.inDays);
+  Expect.equals(0, d.inHours);
+  Expect.equals(0, d.inMinutes);
+  Expect.equals(0, d.inSeconds);
+  Expect.equals(1, d.inMilliseconds);
+  Expect.equals(1001, d.inMicroseconds);
 
   var d1 = const Duration(milliseconds: 1000);
   var d2 = const Duration(seconds: 1);
   Expect.identical(d1, d2);
 
+  d1 = const Duration(microseconds: 1000);
+  d2 = const Duration(milliseconds: 1);
+  Expect.identical(d1, d2);
+
   d1 = new Duration(hours: 1);
   d2 = new Duration(hours: -1);
   d = d1 + d2;
-  Expect.equals(0, d.inMilliseconds);
+  Expect.equals(0, d.inMicroseconds);
   d = d1 - d2;
-  Expect.equals(3600000 * 2, d.inMilliseconds);
+  Expect.equals(3600000000 * 2, d.inMicroseconds);
 
   d2 = new Duration(hours: 1);
   d = d1 + d2;
-  Expect.equals(3600000 * 2, d.inMilliseconds);
+  Expect.equals(3600000000 * 2, d.inMicroseconds);
   d = d1 - d2;
-  Expect.equals(0, d.inMilliseconds);
+  Expect.equals(0, d.inMicroseconds);
 
   d = d1 * 2;
-  Expect.equals(3600000 * 2, d.inMilliseconds);
+  Expect.equals(3600000000 * 2, d.inMicroseconds);
   d = d1 * -1;
-  Expect.equals(-3600000, d.inMilliseconds);
+  Expect.equals(-3600000000, d.inMicroseconds);
   d = d1 * 0;
-  Expect.equals(0, d.inMilliseconds);
+  Expect.equals(0, d.inMicroseconds);
 
   d = d1 ~/ 2;
-  Expect.equals(1800000, d.inMilliseconds);
-  d = d1 ~/ 3600001;
-  Expect.equals(0, d.inMilliseconds);
-  d = d1 ~/ -3600001;
-  Expect.equals(0, d.inMilliseconds);
-  d = d1 ~/ 3599999;
-  Expect.equals(1, d.inMilliseconds);
-  d = d1 ~/ -3599999;
-  Expect.equals(-1, d.inMilliseconds);
+  Expect.equals(1800000000, d.inMicroseconds);
+  d = d1 ~/ 3600000001;
+  Expect.equals(0, d.inMicroseconds);
+  d = d1 ~/ -3600000001;
+  Expect.equals(0, d.inMicroseconds);
+  d = d1 ~/ 3599999999;
+  Expect.equals(1, d.inMicroseconds);
+  d = d1 ~/ -3599999999;
+  Expect.equals(-1, d.inMicroseconds);
   d = d1 ~/ -1;
-  Expect.equals(-3600000, d.inMilliseconds);
+  Expect.equals(-3600000000, d.inMicroseconds);
   d = d1 * 0;
-  Expect.equals(0, d.inMilliseconds);
+  Expect.equals(0, d.inMicroseconds);
   Expect.throws(() => d1 ~/ 0,
                 (e) => e is IntegerDivisionByZeroException);
 
-  d = new Duration(milliseconds: 0);
-  Expect.isTrue(d < new Duration(milliseconds: 1));
-  Expect.isTrue(d <= new Duration(milliseconds: 1));
+  d = new Duration(microseconds: 0);
+  Expect.isTrue(d < new Duration(microseconds: 1));
+  Expect.isTrue(d <= new Duration(microseconds: 1));
   Expect.isTrue(d <= d);
-  Expect.isTrue(d > new Duration(milliseconds: -1));
-  Expect.isTrue(d >= new Duration(milliseconds: -1));
+  Expect.isTrue(d > new Duration(microseconds: -1));
+  Expect.isTrue(d >= new Duration(microseconds: -1));
   Expect.isTrue(d >= d);
+
+  d = const Duration(days: 1, hours: 3, minutes: 17, seconds: 42,
+                     milliseconds: 823, microseconds: 127);
+  Expect.equals("27:17:42.823127", d.toString());
+
+  d = const Duration(hours: 1999, minutes: 17, seconds: 42);
+  Expect.equals("1999:17:42.000000", d.toString());
+
+  d = const Duration(days: -1, hours: -3, minutes: -17, seconds: -42,
+                     milliseconds: -823, microseconds: -127);
+  Expect.equals("-27:17:42.823127", d.toString());
+
+  d = const Duration(hours: -1999, minutes: -17, seconds: -42);
+  Expect.equals("-1999:17:42.000000", d.toString());
 }