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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) => new _OrderingComparison( | |
| 17 value, true, false, true, 'a value greater than or equal to'); | |
| 18 | |
| 19 /// Returns a matcher which matches if the match argument is less | |
| 20 /// than the given [value]. | |
| 21 Matcher lessThan(value) => | |
| 22 new _OrderingComparison(value, false, true, false, 'a value less than'); | |
| 23 | |
| 24 /// Returns a matcher which matches if the match argument is less | |
| 25 /// than or equal to the given [value]. | |
| 26 Matcher lessThanOrEqualTo(value) => new _OrderingComparison( | |
| 27 value, true, true, false, 'a value less than or equal to'); | |
| 28 | |
| 29 /// A matcher which matches if the match argument is zero. | |
| 30 const Matcher isZero = | |
| 31 const _OrderingComparison(0, true, false, false, 'a value equal to'); | |
| 32 | |
| 33 /// A matcher which matches if the match argument is non-zero. | |
| 34 const Matcher isNonZero = | |
| 35 const _OrderingComparison(0, false, true, true, 'a value not equal to'); | |
| 36 | |
| 37 /// A matcher which matches if the match argument is positive. | |
| 38 const Matcher isPositive = | |
| 39 const _OrderingComparison(0, false, false, true, 'a positive value', false); | |
| 40 | |
| 41 /// A matcher which matches if the match argument is zero or negative. | |
| 42 const Matcher isNonPositive = const _OrderingComparison( | |
| 43 0, true, true, false, 'a non-positive value', false); | |
| 44 | |
| 45 /// A matcher which matches if the match argument is negative. | |
| 46 const Matcher isNegative = | |
| 47 const _OrderingComparison(0, false, true, false, 'a negative value', false); | |
| 48 | |
| 49 /// A matcher which matches if the match argument is zero or positive. | |
| 50 const Matcher isNonNegative = const _OrderingComparison( | |
| 51 0, true, false, true, 'a non-negative value', false); | |
| 52 | |
| 53 bool _isNumeric(value) { | |
| 54 return value is num; | |
| 55 } | |
| 56 | |
| 57 // TODO(kevmoo) Note that matchers that use _OrderingComparison only use | |
| 58 // `==` and `<` operators to evaluate the match. Or change the matcher. | |
| 59 class _OrderingComparison extends Matcher { | |
| 60 /// Expected value. | |
| 61 final _value; | |
| 62 /// What to return if actual == expected | |
| 63 final bool _equalValue; | |
| 64 /// What to return if actual < expected | |
| 65 final bool _lessThanValue; | |
| 66 /// What to return if actual > expected | |
| 67 final bool _greaterThanValue; | |
| 68 /// Textual name of the inequality | |
| 69 final String _comparisonDescription; | |
| 70 /// Whether to include the expected value in the description | |
| 71 final bool _valueInDescription; | |
| 72 | |
| 73 const _OrderingComparison(this._value, this._equalValue, this._lessThanValue, | |
| 74 this._greaterThanValue, this._comparisonDescription, | |
| 75 [bool valueInDescription = true]) | |
| 76 : this._valueInDescription = valueInDescription; | |
| 77 | |
| 78 bool matches(item, Map matchState) { | |
| 79 if (item == _value) { | |
| 80 return _equalValue; | |
| 81 } else if (item < _value) { | |
| 82 return _lessThanValue; | |
| 83 } else { | |
| 84 return _greaterThanValue; | |
| 85 } | |
| 86 } | |
| 87 | |
| 88 Description describe(Description description) { | |
| 89 if (_valueInDescription) { | |
| 90 return description | |
| 91 .add(_comparisonDescription) | |
| 92 .add(' ') | |
| 93 .addDescriptionOf(_value); | |
| 94 } else { | |
| 95 return description.add(_comparisonDescription); | |
| 96 } | |
| 97 } | |
| 98 | |
| 99 Description describeMismatch( | |
| 100 item, Description mismatchDescription, Map matchState, bool verbose) { | |
| 101 mismatchDescription.add('is not '); | |
| 102 return describe(mismatchDescription); | |
| 103 } | |
| 104 } | |
| 105 | |
| 106 /// Returns a matcher which matches if the match argument is within [delta] | |
| 107 /// of some [value]. | |
| 108 /// | |
| 109 /// In other words, this matches if the match argument is greater than | |
| 110 /// than or equal [value]-[delta] and less than or equal to [value]+[delta]. | |
| 111 Matcher closeTo(num value, num delta) => new _IsCloseTo(value, delta); | |
| 112 | |
| 113 class _IsCloseTo extends Matcher { | |
| 114 final num _value, _delta; | |
| 115 | |
| 116 const _IsCloseTo(this._value, this._delta); | |
| 117 | |
| 118 bool matches(item, Map matchState) { | |
| 119 if (!_isNumeric(item)) { | |
| 120 return false; | |
| 121 } | |
| 122 var diff = item - _value; | |
| 123 if (diff < 0) diff = -diff; | |
| 124 return (diff <= _delta); | |
| 125 } | |
| 126 | |
| 127 Description describe(Description description) => description | |
| 128 .add('a numeric value within ') | |
| 129 .addDescriptionOf(_delta) | |
| 130 .add(' of ') | |
| 131 .addDescriptionOf(_value); | |
| 132 | |
| 133 Description describeMismatch( | |
| 134 item, Description mismatchDescription, Map matchState, bool verbose) { | |
| 135 if (item is! num) { | |
| 136 return mismatchDescription.add(' not numeric'); | |
| 137 } else { | |
| 138 var diff = item - _value; | |
| 139 if (diff < 0) diff = -diff; | |
| 140 return mismatchDescription.add(' differs by ').addDescriptionOf(diff); | |
| 141 } | |
| 142 } | |
| 143 } | |
| 144 | |
| 145 /// Returns a matcher which matches if the match argument is greater | |
| 146 /// than or equal to [low] and less than or equal to [high]. | |
| 147 Matcher inInclusiveRange(num low, num high) => | |
| 148 new _InRange(low, high, true, true); | |
| 149 | |
| 150 /// Returns a matcher which matches if the match argument is greater | |
| 151 /// than [low] and less than [high]. | |
| 152 Matcher inExclusiveRange(num low, num high) => | |
| 153 new _InRange(low, high, false, false); | |
| 154 | |
| 155 /// Returns a matcher which matches if the match argument is greater | |
| 156 /// than [low] and less than or equal to [high]. | |
| 157 Matcher inOpenClosedRange(num low, num high) => | |
| 158 new _InRange(low, high, false, true); | |
| 159 | |
| 160 /// Returns a matcher which matches if the match argument is greater | |
| 161 /// than or equal to a [low] and less than [high]. | |
| 162 Matcher inClosedOpenRange(num low, num high) => | |
| 163 new _InRange(low, high, true, false); | |
| 164 | |
| 165 class _InRange extends Matcher { | |
| 166 final num _low, _high; | |
| 167 final bool _lowMatchValue, _highMatchValue; | |
| 168 | |
| 169 const _InRange( | |
| 170 this._low, this._high, this._lowMatchValue, this._highMatchValue); | |
| 171 | |
| 172 bool matches(value, Map matchState) { | |
| 173 if (value is! num) { | |
| 174 return false; | |
| 175 } | |
| 176 if (value < _low || value > _high) { | |
| 177 return false; | |
| 178 } | |
| 179 if (value == _low) { | |
| 180 return _lowMatchValue; | |
| 181 } | |
| 182 if (value == _high) { | |
| 183 return _highMatchValue; | |
| 184 } | |
| 185 return true; | |
| 186 } | |
| 187 | |
| 188 Description describe(Description description) => description.add( | |
| 189 "be in range from " | |
| 190 "$_low (${_lowMatchValue ? 'inclusive' : 'exclusive'}) to " | |
| 191 "$_high (${_highMatchValue ? 'inclusive' : 'exclusive'})"); | |
| 192 | |
| 193 Description describeMismatch( | |
| 194 item, Description mismatchDescription, Map matchState, bool verbose) { | |
| 195 if (item is! num) { | |
| 196 return mismatchDescription.addDescriptionOf(item).add(' not numeric'); | |
| 197 } else { | |
| 198 return super.describeMismatch( | |
| 199 item, mismatchDescription, matchState, verbose); | |
| 200 } | |
| 201 } | |
| 202 } | |
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Chromium Code Reviews
Issue 1400473008:
Roll Observatory packages and add a roll script (Closed)
Base URL: git@github.com:dart-lang/observatory_pub_packages.git@master