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| 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | |
| 2 // for details. All rights reserved. Use of this source code is governed by a | |
| 3 // BSD-style license that can be found in the LICENSE file. | |
| 4 | |
| 5 library matcher.numeric_matchers; | |
| 6 | |
| 7 import 'interfaces.dart'; | |
| 8 | |
| 9 /// Returns a matcher which matches if the match argument is greater | |
| 10 /// than the given [value]. | |
| 11 Matcher greaterThan(value) => | |
| 12 new _OrderingComparison(value, false, false, true, 'a value greater than'); | |
| 13 | |
| 14 /// Returns a matcher which matches if the match argument is greater | |
| 15 /// than or equal to the given [value]. | |
| 16 Matcher greaterThanOrEqualTo(value) => | |
| 17 new _OrderingComparison(value, true, false, true, | |
| 18 'a value greater than or equal to'); | |
| 19 | |
| 20 /// Returns a matcher which matches if the match argument is less | |
| 21 /// than the given [value]. | |
| 22 Matcher lessThan(value) => | |
| 23 new _OrderingComparison(value, false, true, false, 'a value less than'); | |
| 24 | |
| 25 /// Returns a matcher which matches if the match argument is less | |
| 26 /// than or equal to the given [value]. | |
| 27 Matcher lessThanOrEqualTo(value) => | |
| 28 new _OrderingComparison(value, true, true, false, | |
| 29 'a value less than or equal to'); | |
| 30 | |
| 31 /// A matcher which matches if the match argument is zero. | |
| 32 const Matcher isZero = | |
| 33 const _OrderingComparison(0, true, false, false, 'a value equal to'); | |
| 34 | |
| 35 | |
| 36 /// A matcher which matches if the match argument is non-zero. | |
| 37 const Matcher isNonZero = | |
| 38 const _OrderingComparison(0, false, true, true, 'a value not equal to'); | |
| 39 | |
| 40 /// A matcher which matches if the match argument is positive. | |
| 41 const Matcher isPositive = | |
| 42 const _OrderingComparison(0, false, false, true, 'a positive value', false); | |
| 43 | |
| 44 /// A matcher which matches if the match argument is zero or negative. | |
| 45 const Matcher isNonPositive = | |
| 46 const _OrderingComparison(0, true, true, false, | |
| 47 'a non-positive value', false); | |
| 48 | |
| 49 /// A matcher which matches if the match argument is negative. | |
| 50 const Matcher isNegative = | |
| 51 const _OrderingComparison(0, false, true, false, 'a negative value', false); | |
| 52 | |
| 53 /// A matcher which matches if the match argument is zero or positive. | |
| 54 const Matcher isNonNegative = | |
| 55 const _OrderingComparison(0, true, false, true, | |
| 56 'a non-negative value', false); | |
| 57 | |
| 58 bool _isNumeric(value) { | |
| 59 return value is num; | |
| 60 } | |
| 61 | |
| 62 // TODO(kevmoo) Note that matchers that use _OrderingComparison only use | |
| 63 // `==` and `<` operators to evaluate the match. Or change the matcher. | |
| 64 class _OrderingComparison extends Matcher { | |
| 65 /// Expected value. | |
| 66 final _value; | |
| 67 /// What to return if actual == expected | |
| 68 final bool _equalValue; | |
| 69 /// What to return if actual < expected | |
| 70 final bool _lessThanValue; | |
| 71 /// What to return if actual > expected | |
| 72 final bool _greaterThanValue; | |
| 73 /// Textual name of the inequality | |
| 74 final String _comparisonDescription; | |
| 75 /// Whether to include the expected value in the description | |
| 76 final bool _valueInDescription; | |
| 77 | |
| 78 const _OrderingComparison( | |
| 79 this._value, | |
| 80 this._equalValue, | |
| 81 this._lessThanValue, | |
| 82 this._greaterThanValue, | |
| 83 this._comparisonDescription, | |
| 84 [bool valueInDescription = true]) : | |
| 85 this._valueInDescription = valueInDescription; | |
| 86 | |
| 87 bool matches(item, Map matchState) { | |
| 88 if (item == _value) { | |
| 89 return _equalValue; | |
| 90 } else if (item < _value) { | |
| 91 return _lessThanValue; | |
| 92 } else { | |
| 93 return _greaterThanValue; | |
| 94 } | |
| 95 } | |
| 96 | |
| 97 Description describe(Description description) { | |
| 98 if (_valueInDescription) { | |
| 99 return description.add(_comparisonDescription).add(' '). | |
| 100 addDescriptionOf(_value); | |
| 101 } else { | |
| 102 return description.add(_comparisonDescription); | |
| 103 } | |
| 104 } | |
| 105 | |
| 106 Description describeMismatch(item, Description mismatchDescription, | |
| 107 Map matchState, bool verbose) { | |
| 108 mismatchDescription.add('is not '); | |
| 109 return describe(mismatchDescription); | |
| 110 } | |
| 111 } | |
| 112 | |
| 113 /// Returns a matcher which matches if the match argument is within [delta] | |
| 114 /// of some [value]. | |
| 115 /// | |
| 116 /// In other words, this matches if the match argument is greater than | |
| 117 /// than or equal [value]-[delta] and less than or equal to [value]+[delta]. | |
| 118 Matcher closeTo(num value, num delta) => new _IsCloseTo(value, delta); | |
| 119 | |
| 120 class _IsCloseTo extends Matcher { | |
| 121 final num _value, _delta; | |
| 122 | |
| 123 const _IsCloseTo(this._value, this._delta); | |
| 124 | |
| 125 bool matches(item, Map matchState) { | |
| 126 if (!_isNumeric(item)) { | |
| 127 return false; | |
| 128 } | |
| 129 var diff = item - _value; | |
| 130 if (diff < 0) diff = -diff; | |
| 131 return (diff <= _delta); | |
| 132 } | |
| 133 | |
| 134 Description describe(Description description) => | |
| 135 description.add('a numeric value within '). | |
| 136 addDescriptionOf(_delta). | |
| 137 add(' of '). | |
| 138 addDescriptionOf(_value); | |
| 139 | |
| 140 Description describeMismatch(item, Description mismatchDescription, | |
| 141 Map matchState, bool verbose) { | |
| 142 if (item is !num) { | |
| 143 return mismatchDescription.add(' not numeric'); | |
| 144 } else { | |
| 145 var diff = item - _value; | |
| 146 if (diff < 0) diff = -diff; | |
| 147 return mismatchDescription. | |
| 148 add(' differs by '). | |
| 149 addDescriptionOf(diff); | |
| 150 } | |
| 151 } | |
| 152 } | |
| 153 | |
| 154 /// Returns a matcher which matches if the match argument is greater | |
| 155 /// than or equal to [low] and less than or equal to [high]. | |
| 156 Matcher inInclusiveRange(num low, num high) => | |
| 157 new _InRange(low, high, true, true); | |
| 158 | |
| 159 /// Returns a matcher which matches if the match argument is greater | |
| 160 /// than [low] and less than [high]. | |
| 161 Matcher inExclusiveRange(num low, num high) => | |
| 162 new _InRange(low, high, false, false); | |
| 163 | |
| 164 /// Returns a matcher which matches if the match argument is greater | |
| 165 /// than [low] and less than or equal to [high]. | |
| 166 Matcher inOpenClosedRange(num low, num high) => | |
| 167 new _InRange(low, high, false, true); | |
| 168 | |
| 169 /// Returns a matcher which matches if the match argument is greater | |
| 170 /// than or equal to a [low] and less than [high]. | |
| 171 Matcher inClosedOpenRange(num low, num high) => | |
| 172 new _InRange(low, high, true, false); | |
| 173 | |
| 174 class _InRange extends Matcher { | |
| 175 final num _low, _high; | |
| 176 final bool _lowMatchValue, _highMatchValue; | |
| 177 | |
| 178 const _InRange(this._low, this._high, | |
| 179 this._lowMatchValue, this._highMatchValue); | |
| 180 | |
| 181 bool matches(value, Map matchState) { | |
| 182 if (value is! num) { | |
| 183 return false; | |
| 184 } | |
| 185 if (value < _low || value > _high) { | |
| 186 return false; | |
| 187 } | |
| 188 if (value == _low) { | |
| 189 return _lowMatchValue; | |
| 190 } | |
| 191 if (value == _high) { | |
| 192 return _highMatchValue; | |
| 193 } | |
| 194 return true; | |
| 195 } | |
| 196 | |
| 197 Description describe(Description description) => | |
| 198 description.add("be in range from " | |
| 199 "$_low (${_lowMatchValue ? 'inclusive' : 'exclusive'}) to " | |
| 200 "$_high (${_highMatchValue ? 'inclusive' : 'exclusive'})"); | |
| 201 | |
| 202 Description describeMismatch(item, Description mismatchDescription, | |
| 203 Map matchState, bool verbose) { | |
| 204 if (item is !num) { | |
| 205 return mismatchDescription. | |
| 206 addDescriptionOf(item). | |
| 207 add(' not numeric'); | |
| 208 } else { | |
| 209 return super.describeMismatch(item, mismatchDescription, | |
| 210 matchState, verbose); | |
| 211 } | |
| 212 } | |
| 213 } | |
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Chromium Code Reviews
Issue 814953002:
Remove unittest and matcher from the repo. (Closed)
Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart