Added nextIntRange to dartvm and dart2js.

tests/lib/math/math2_test.dart

 // Copyright (c) 2012, 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.
 
 // We temporarily test both the new math library and the old Math
 // class. This can easily be simplified once we get rid of the Math
 // class entirely.
 #library('math_test');
 #import('dart:math', prefix: 'math');
 
@@ skipping 223 matching lines @@
     Expect.equals(true, parseIntThrowsFormatException("+ 5"));
     Expect.equals(true, parseIntThrowsFormatException("- 5"));
     Expect.equals(true, parseIntThrowsFormatException(""));
     Expect.equals(true, parseIntThrowsFormatException("  "));
     Expect.equals(true, parseIntThrowsFormatException("+0x1234567890"));
     Expect.equals(true, parseIntThrowsFormatException("   +0x1234567890   "));
     Expect.equals(true, parseIntThrowsFormatException("+0x100"));
     Expect.equals(true, parseIntThrowsFormatException("   +0x100   "));
   }
 
+  static void testRandom() {
+    math.Random r = new math.Random();
+    checkClose(5, r.nextIntRange(1, 10), 10);

[floitsch, 2013/11/18 13:36:03]

checkClose is typed for doubles. This will throw in checked mode.

Check by hand that it is in the range.
Also: Add 3 more tests:
- one that has min negative: Expect.throws(...)
- one that has min == max.
- one that has min == max - 1. (just one value). and make sure the returned
value equals min.

+    checkClose(5, r.nextInt(10), 10);
+  }
+
   static testMain() {
     testConstants();
     testSin();
     testCos();
     testTan();
     testAsin();
     testAcos();
     testAtan();
     testAtan2();
     testSqrt();
     testLog();
     testExp();
     testPow();
     testParseInt();
+    testRandom();
   }
 }
 
 main() {
   MathLibraryTest.testMain();
 }