ArgumentCaptor to easily verify complex argument values

[danail-branekov]

Hi,

Mockito offers a convenient tool called ArgumentCaptor which is really useful for analyzing actual argument values - http://docs.mockito.googlecode.com/hg/org/mockito/ArgumentCaptor.html
I just noticed that JsMockito is missing this feature
Here is my implementation, I would be glad to make it part of JsMockito :)

function ArgumentCaptor() {
    var val;
}

ArgumentCaptor.prototype.capture = function () {
    var that = this;
    return new JsHamcrest.SimpleMatcher({
        matches: function (actual) {
            that.val = actual;
            return true;
        },

        describeTo: function (description) {
            description.append("Argument Captor");
        }
    });
};

ArgumentCaptor.prototype.getValue = function () {
    return this.val;
};

Here is an example usage:

var mockedFunction = JsMockito.mockFunction();
var argsCaptor = new ArgumentCaptor();
JsMockito.verify(mockedFunction)(argsCaptor.capture());
var invocationArgs = argsCaptor.getValue();
// verify invocationArgs here

[Tzrlk]

Raise a pull request?