Index: lib/src/order_matchers.dart |
diff --git a/lib/src/order_matchers.dart b/lib/src/order_matchers.dart |
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+++ b/lib/src/order_matchers.dart |
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+// Copyright (c) 2016, 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. |
+ |
+import 'interfaces.dart'; |
+ |
+/// Returns a matcher which matches if the match argument is greater |
+/// than the given [value]. |
+Matcher greaterThan(value) => |
+ new _OrderingMatcher(value, false, false, true, 'a value greater than'); |
+ |
+/// Returns a matcher which matches if the match argument is greater |
+/// than or equal to the given [value]. |
+Matcher greaterThanOrEqualTo(value) => new _OrderingMatcher( |
+ value, true, false, true, 'a value greater than or equal to'); |
+ |
+/// Returns a matcher which matches if the match argument is less |
+/// than the given [value]. |
+Matcher lessThan(value) => |
+ new _OrderingMatcher(value, false, true, false, 'a value less than'); |
+ |
+/// Returns a matcher which matches if the match argument is less |
+/// than or equal to the given [value]. |
+Matcher lessThanOrEqualTo(value) => new _OrderingMatcher( |
+ value, true, true, false, 'a value less than or equal to'); |
+ |
+/// A matcher which matches if the match argument is zero. |
+const Matcher isZero = |
+ const _OrderingMatcher(0, true, false, false, 'a value equal to'); |
+ |
+/// A matcher which matches if the match argument is non-zero. |
+const Matcher isNonZero = |
+ const _OrderingMatcher(0, false, true, true, 'a value not equal to'); |
+ |
+/// A matcher which matches if the match argument is positive. |
+const Matcher isPositive = |
+ const _OrderingMatcher(0, false, false, true, 'a positive value', false); |
+ |
+/// A matcher which matches if the match argument is zero or negative. |
+const Matcher isNonPositive = |
+ const _OrderingMatcher(0, true, true, false, 'a non-positive value', false); |
+ |
+/// A matcher which matches if the match argument is negative. |
+const Matcher isNegative = |
+ const _OrderingMatcher(0, false, true, false, 'a negative value', false); |
+ |
+/// A matcher which matches if the match argument is zero or positive. |
+const Matcher isNonNegative = |
+ const _OrderingMatcher(0, true, false, true, 'a non-negative value', false); |
+ |
+// TODO(kevmoo) Note that matchers that use _OrderingComparison only use |
+// `==` and `<` operators to evaluate the match. Or change the matcher. |
+class _OrderingMatcher 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 |
+ final bool _greaterThanValue; |
+ |
+ /// Textual name of the inequality |
+ final String _comparisonDescription; |
+ |
+ /// Whether to include the expected value in the description |
+ final bool _valueInDescription; |
+ |
+ const _OrderingMatcher(this._value, this._equalValue, this._lessThanValue, |
+ this._greaterThanValue, this._comparisonDescription, |
+ [bool valueInDescription = true]) |
+ : this._valueInDescription = valueInDescription; |
+ |
+ bool matches(item, Map matchState) { |
+ if (item == _value) { |
+ return _equalValue; |
+ } else if (item < _value) { |
+ return _lessThanValue; |
+ } else { |
+ return _greaterThanValue; |
+ } |
+ } |
+ |
+ Description describe(Description description) { |
+ if (_valueInDescription) { |
+ return description |
+ .add(_comparisonDescription) |
+ .add(' ') |
+ .addDescriptionOf(_value); |
+ } else { |
+ return description.add(_comparisonDescription); |
+ } |
+ } |
+ |
+ Description describeMismatch( |
+ item, Description mismatchDescription, Map matchState, bool verbose) { |
+ mismatchDescription.add('is not '); |
+ return describe(mismatchDescription); |
+ } |
+} |