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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 part of unittest.matcher; | |
| 6 | |
| 7 /** | |
| 8 * Returns a matcher which matches if the match argument is greater | |
| 9 * than the given [value]. | |
| 10 */ | |
| 11 Matcher greaterThan(value) => | |
| 12 new _OrderingComparison(value, false, false, true, 'a value greater than'); | |
| 13 | |
| 14 /** | |
| 15 * Returns a matcher which matches if the match argument is greater | |
| 16 * than or equal to the given [value]. | |
| 17 */ | |
| 18 Matcher greaterThanOrEqualTo(value) => | |
| 19 new _OrderingComparison(value, true, false, true, | |
| 20 'a value greater than or equal to'); | |
| 21 | |
| 22 /** | |
| 23 * Returns a matcher which matches if the match argument is less | |
| 24 * than the given [value]. | |
| 25 */ | |
| 26 Matcher lessThan(value) => | |
| 27 new _OrderingComparison(value, false, true, false, 'a value less than'); | |
| 28 | |
| 29 /** | |
| 30 * Returns a matcher which matches if the match argument is less | |
| 31 * than or equal to the given [value]. | |
| 32 */ | |
| 33 Matcher lessThanOrEqualTo(value) => | |
| 34 new _OrderingComparison(value, true, true, false, | |
| 35 'a value less than or equal to'); | |
| 36 | |
| 37 /** | |
| 38 * A matcher which matches if the match argument is zero. | |
| 39 */ | |
| 40 const Matcher isZero = | |
| 41 const _OrderingComparison(0, true, false, false, 'a value equal to'); | |
| 42 | |
| 43 | |
| 44 /** | |
| 45 * A matcher which matches if the match argument is non-zero. | |
| 46 */ | |
| 47 const Matcher isNonZero = | |
| 48 const _OrderingComparison(0, false, true, true, 'a value not equal to'); | |
| 49 | |
| 50 /** | |
| 51 * A matcher which matches if the match argument is positive. | |
| 52 */ | |
| 53 const Matcher isPositive = | |
| 54 const _OrderingComparison(0, false, false, true, 'a positive value', false); | |
| 55 | |
| 56 /** | |
| 57 * A matcher which matches if the match argument is zero or negative. | |
| 58 */ | |
| 59 const Matcher isNonPositive = | |
| 60 const _OrderingComparison(0, true, true, false, | |
| 61 'a non-positive value', false); | |
| 62 | |
| 63 /** | |
| 64 * A matcher which matches if the match argument is negative. | |
| 65 */ | |
| 66 const Matcher isNegative = | |
| 67 const _OrderingComparison(0, false, true, false, 'a negative value', false); | |
| 68 | |
| 69 /** | |
| 70 * A matcher which matches if the match argument is zero or positive. | |
| 71 */ | |
| 72 const Matcher isNonNegative = | |
| 73 const _OrderingComparison(0, true, false, true, | |
| 74 'a non-negative value', false); | |
| 75 | |
| 76 bool _isNumeric(value) { | |
| 77 return value is num; | |
| 78 } | |
| 79 | |
| 80 class _OrderingComparison extends Matcher { | |
| 81 /** Expected value. */ | |
| 82 final _value; | |
| 83 /** What to return if actual == expected */ | |
| 84 final bool _equalValue; | |
| 85 /** What to return if actual < expected */ | |
| 86 final bool _lessThanValue; | |
| 87 /** What to return if actual > expected */ | |
| 88 final bool _greaterThanValue; | |
| 89 /** Textual name of the inequality */ | |
| 90 final String _comparisonDescription; | |
| 91 /** Whether to include the expected value in the description */ | |
| 92 final bool _valueInDescription; | |
| 93 | |
| 94 const _OrderingComparison( | |
| 95 this._value, | |
| 96 this._equalValue, | |
| 97 this._lessThanValue, | |
| 98 this._greaterThanValue, | |
| 99 this._comparisonDescription, | |
| 100 [valueInDescription = true]) : | |
| 101 this._valueInDescription = valueInDescription; | |
| 102 | |
| 103 bool matches(item, Map matchState) { | |
| 104 if (item == _value) { | |
| 105 return _equalValue; | |
| 106 } else if (item < _value) { | |
| 107 return _lessThanValue; | |
| 108 } else { | |
| 109 return _greaterThanValue; | |
| 110 } | |
| 111 } | |
| 112 | |
| 113 Description describe(Description description) { | |
| 114 if (_valueInDescription) { | |
| 115 return description.add(_comparisonDescription).add(' '). | |
| 116 addDescriptionOf(_value); | |
| 117 } else { | |
| 118 return description.add(_comparisonDescription); | |
| 119 } | |
| 120 } | |
| 121 | |
| 122 Description describeMismatch(item, Description mismatchDescription, | |
| 123 Map matchState, bool verbose) { | |
| 124 mismatchDescription.add('is not '); | |
| 125 return describe(mismatchDescription); | |
| 126 } | |
| 127 } | |
| 128 | |
| 129 /** | |
| 130 * Returns a matcher which matches if the match argument is within [delta] | |
| 131 * of some [value]; i.e. if the match argument is greater than | |
| 132 * than or equal [value]-[delta] and less than or equal to [value]+[delta]. | |
| 133 */ | |
| 134 Matcher closeTo(value, delta) => new _IsCloseTo(value, delta); | |
| 135 | |
| 136 class _IsCloseTo extends Matcher { | |
| 137 final num _value, _delta; | |
| 138 | |
| 139 const _IsCloseTo(this._value, this._delta); | |
| 140 | |
| 141 bool matches(item, Map matchState) { | |
| 142 if (!_isNumeric(item)) { | |
| 143 return false; | |
| 144 } | |
| 145 var diff = item - _value; | |
| 146 if (diff < 0) diff = -diff; | |
| 147 return (diff <= _delta); | |
| 148 } | |
| 149 | |
| 150 Description describe(Description description) => | |
| 151 description.add('a numeric value within '). | |
| 152 addDescriptionOf(_delta). | |
| 153 add(' of '). | |
| 154 addDescriptionOf(_value); | |
| 155 | |
| 156 Description describeMismatch(item, Description mismatchDescription, | |
| 157 Map matchState, bool verbose) { | |
| 158 if (item is !num) { | |
| 159 return mismatchDescription.add(' not numeric'); | |
| 160 } else { | |
| 161 var diff = item - _value; | |
| 162 if (diff < 0) diff = -diff; | |
| 163 return mismatchDescription. | |
| 164 add(' differs by '). | |
| 165 addDescriptionOf(diff); | |
| 166 } | |
| 167 } | |
| 168 } | |
| 169 | |
| 170 /** | |
| 171 * Returns a matcher which matches if the match argument is greater | |
| 172 * than or equal to [low] and less than or equal to [high]. | |
| 173 */ | |
| 174 Matcher inInclusiveRange(low, high) => new _InRange(low, high, true, true); | |
| 175 | |
| 176 /** | |
| 177 * Returns a matcher which matches if the match argument is greater | |
| 178 * than [low] and less than [high]. | |
| 179 */ | |
| 180 Matcher inExclusiveRange(low, high) => new _InRange(low, high, false, false); | |
| 181 | |
| 182 /** | |
| 183 * Returns a matcher which matches if the match argument is greater | |
| 184 * than [low] and less than or equal to [high]. | |
| 185 */ | |
| 186 Matcher inOpenClosedRange(low, high) => new _InRange(low, high, false, true); | |
| 187 | |
| 188 /** | |
| 189 * Returns a matcher which matches if the match argument is greater | |
| 190 * than or equal to a [low] and less than [high]. | |
| 191 */ | |
| 192 Matcher inClosedOpenRange(low, high) => new _InRange(low, high, true, false); | |
| 193 | |
| 194 class _InRange extends Matcher { | |
| 195 final num _low, _high; | |
| 196 final bool _lowMatchValue, _highMatchValue; | |
| 197 | |
| 198 const _InRange(this._low, this._high, | |
| 199 this._lowMatchValue, this._highMatchValue); | |
| 200 | |
| 201 bool matches(value, Map matchState) { | |
| 202 if (value is! num) { | |
| 203 return false; | |
| 204 } | |
| 205 if (value < _low || value > _high) { | |
| 206 return false; | |
| 207 } | |
| 208 if (value == _low) { | |
| 209 return _lowMatchValue; | |
| 210 } | |
| 211 if (value == _high) { | |
| 212 return _highMatchValue; | |
| 213 } | |
| 214 return true; | |
| 215 } | |
| 216 | |
| 217 Description describe(Description description) => | |
| 218 description.add("be in range from " | |
| 219 "$_low (${_lowMatchValue ? 'inclusive' : 'exclusive'}) to " | |
| 220 "$_high (${_highMatchValue ? 'inclusive' : 'exclusive'})"); | |
| 221 | |
| 222 Description describeMismatch(item, Description mismatchDescription, | |
| 223 Map matchState, bool verbose) { | |
| 224 if (item is !num) { | |
| 225 return mismatchDescription. | |
| 226 addDescriptionOf(item). | |
| 227 add(' not numeric'); | |
| 228 } else { | |
| 229 return super.describeMismatch(item, mismatchDescription, | |
| 230 matchState, verbose); | |
| 231 } | |
| 232 } | |
| 233 } | |
| 234 | |
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