Improved the way we generate mismatch descriptions.

lib/unittest/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.
 
 /**
  * Returns a matcher which matches if the match argument is greater
  * than the given [value].
  */
 Matcher greaterThan(value) =>
   new _OrderingComparison(value, false, false, true, 'a value greater than');
@@ skipping 77 matching lines @@
   final String _comparisonDescription;
   /** Whether to include the expected value in the description */
   final bool _valueInDescription;
 
   const _OrderingComparison(
     this._value,
     this._equalValue,
     this._lessThanValue,
     this._greaterThanValue,
     this._comparisonDescription,
-    [valueInDescription = true]) : 
+    [valueInDescription = true]) :
       this._valueInDescription = valueInDescription;
 
-  bool matches(item) {
+  bool matches(item, MatchState matchState) {
     if (item == _value) {
       return _equalValue;
     } else if (item < _value) {
       return _lessThanValue;
     } else {
       return _greaterThanValue;
     }
   }
 
   Description describe(Description description) {
@@ skipping 11 matching lines @@
  * of some [value]; i.e. if the match argument is greater than
  * than or equal [value]-[delta] and less than or equal to [value]+[delta].
  */
 Matcher closeTo(value, delta) => new _IsCloseTo(value, delta);
 
 class _IsCloseTo extends BaseMatcher {
   final num _value, _delta;
 
   const _IsCloseTo(this._value, this._delta);
 
-  bool matches(item) {
+  bool matches(item, MatchState matchState) {
     if (!_isNumeric(item)) {
       return false;
     }
     var diff = item - _value;
     if (diff < 0) diff = -diff;
     return (diff <= _delta);
   }
 
   Description describe(Description description) =>
     description.add('a numeric value within ').
         addDescriptionOf(_delta).
         add(' of ').
         addDescriptionOf(_value);
 
-  Description describeMismatch(item, Description mismatchDescription) {
+  Description describeMismatch(item, Description mismatchDescription,
+                               MatchState matchState, bool verbose) {
     if (item is !num) {
       return mismatchDescription.
           addDescriptionOf(item).
           add(' not numeric');
     } else {
       var diff = item - _value;
       if (diff < 0) diff = -diff;
       return mismatchDescription.
           addDescriptionOf(item).
           add(' differed by ').
@@ skipping 26 matching lines @@
  */
 Matcher inClosedOpenRange(low, high) => new _InRange(low, high, true, false);
 
 class _InRange extends BaseMatcher {
   final num _low, _high;
   final bool _lowMatchValue, _highMatchValue;
 
   const _InRange(this._low, this._high,
     this._lowMatchValue, this._highMatchValue);
 
-  bool matches(value) {
+  bool matches(value, MatchState matchState) {
     if (value is !num) {
       return false;
     }
     if (value < _low || value > _high) {
       return false;
     }
     if (value == _low) {
       return _lowMatchValue;
     }
     if (value == _high) {
       return _highMatchValue;
     }
     return true;
   }
 
   Description describe(Description description) =>
       description.add("be in range from "
         "$_low (${_lowMatchValue ? 'inclusive' : 'exclusive'}) to "
         "$_high (${_highMatchValue ? 'inclusive' : 'exclusive'})");
 
-  Description describeMismatch(item, Description mismatchDescription) {
+  Description describeMismatch(item, Description mismatchDescription,
+                               MatchState matchState, bool verbose) {
     if (item is !num) {
       return mismatchDescription.
           addDescriptionOf(item).
           add(' not numeric');
     } else {
-      return super.describeMismatch(item, mismatchDescription);
+      return super.describeMismatch(item, mismatchDescription,
+          matchState, verbose);
     }
   }
 }