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/*!
* Chai - overwriteChainableMethod utility
* Copyright(c) 2012-2014 Jake Luer <jake@alogicalparadox.com>
* MIT Licensed
*/
/**
* ### overwriteChainableMethod (ctx, name, fn)
*
* Overwites an already existing chainable method
* and provides access to the previous function or
* property. Must return functions to be used for
* name.
*
* utils.overwriteChainableMethod(chai.Assertion.prototype, 'length',
* function (_super) {
* }
* , function (_super) {
* }
* );
*
* Can also be accessed directly from `chai.Assertion`.
*
* chai.Assertion.overwriteChainableMethod('foo', fn, fn);
*
* Then can be used as any other assertion.
*
* expect(myFoo).to.have.length(3);
* expect(myFoo).to.have.length.above(3);
*
* @param {Object} ctx object whose method / property is to be overwritten
* @param {String} name of method / property to overwrite
* @param {Function} method function that returns a function to be used for name
* @param {Function} chainingBehavior function that returns a function to be used for property
* @name overwriteChainableMethod
* @api public
*/
module.exports = function (ctx, name, method, chainingBehavior) {
var chainableBehavior = ctx.__methods[name];
var _chainingBehavior = chainableBehavior.chainingBehavior;
chainableBehavior.chainingBehavior = function () {
var result = chainingBehavior(_chainingBehavior).call(this);
return result === undefined ? this : result;
};
var _method = chainableBehavior.method;
chainableBehavior.method = function () {
var result = method(_method).apply(this, arguments);
return result === undefined ? this : result;
};
};
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8 entries across 8 versions & 1 rubygems