pkg/unittest: Capture stackTrace in all failure cases

pkg/unittest/lib/src/numeric_matchers.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.
 
 part of matcher;
 
 /**
  * Returns a matcher which matches if the match argument is greater
  * than the given [value].
  */
@@ skipping 55 matching lines @@
 const Matcher isNegative =
   const _OrderingComparison(0, false, true, false, 'a negative value', false);
 
 /**
  * A matcher which matches if the match argument is zero or positive.
  */
 const Matcher isNonNegative =
   const _OrderingComparison(0, true, false, true,
       'a non-negative value', false);
 
-bool _isNumeric(value) {
-  return value is int || value is double;
+bool _isNumeric(Object value) {
+  return value is num;
 }
 
 class _OrderingComparison extends Matcher {
   /** Expected value. */
   final _value;
   /** What to return if actual == expected */
   final bool _equalValue;
   /** What to return if actual < expected */
   final bool _lessThanValue;
   /** What to return if actual > expected */
@@ skipping 137 matching lines @@
       return mismatchDescription.
           addDescriptionOf(item).
           add(' not numeric');
     } else {
       return super.describeMismatch(item, mismatchDescription,
           matchState, verbose);
     }
   }
 }