buster_keys_assertion.js

buster.assertions.add('keys', {
    assert: function (actual, keys) {
        var keyMap = {};
        var keyCnt = 0;
        for (var i=0; i<keys.length; i++) {
            keyMap[keys[i]] = true;
            keyCnt += 1;
        }
        for (var key in actual) {
            if (actual.hasOwnProperty(key)) {
                if (! keyMap[key]) {
                    return false;
                }
                keyCnt -= 1;
            }
        }
        return keyCnt === 0;
    },
    assertMessage: "Expected ${0} to have exact keys ${1}!",
    refuteMessage: "Expected ${0} not to have exact keys ${1}!"
});