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// Copyright 2012 The Closure Library Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS-IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/**
* @fileoverview Provides the built-in decorators: is, describedAs, anything.
*/
goog.provide('goog.labs.testing.AnythingMatcher');
goog.require('goog.labs.testing.Matcher');
/**
* The Anything matcher. Matches all possible inputs.
*
* @constructor
* @implements {goog.labs.testing.Matcher}
* @final
*/
goog.labs.testing.AnythingMatcher = function() {};
/**
* Matches anything. Useful if one doesn't care what the object under test is.
*
* @override
*/
goog.labs.testing.AnythingMatcher.prototype.matches = function(actualObject) {
return true;
};
/**
* This method is never called but is needed so AnythingMatcher implements the
* Matcher interface.
*
* @override
*/
goog.labs.testing.AnythingMatcher.prototype.describe = function(actualObject) {
throw new Error('AnythingMatcher should never fail!');
};
/**
* Returns a matcher that matches anything.
*
* @return {!goog.labs.testing.AnythingMatcher} A AnythingMatcher.
*/
function anything() {
return new goog.labs.testing.AnythingMatcher();
}
/**
* Returnes any matcher that is passed to it (aids readability).
*
* @param {!goog.labs.testing.Matcher} matcher A matcher.
* @return {!goog.labs.testing.Matcher} The wrapped matcher.
*/
function is(matcher) {
return matcher;
}
/**
* Returns a matcher with a customized description for the given matcher.
*
* @param {string} description The custom description for the matcher.
* @param {!goog.labs.testing.Matcher} matcher The matcher.
*
* @return {!goog.labs.testing.Matcher} The matcher with custom description.
*/
function describedAs(description, matcher) {
matcher.describe = function(value) { return description; };
return matcher;
}
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