$scope.TestFunc = function () {

        alert("TestFunc called");
    }

<button class="btn btn-default btn-column" print-button-spinner  test="TestFunc()" >
    test
 </button>

App.directive('printButtonSpinner', function() {
    return {
        scope:
        {
            docType: '@',
            test: '&'
        },

        restrict: 'A',

        link: function (scope, element) {
            var printFunc = scope.test();
            element.bind('click', printFunc);
        }
    };
});

TypeError: eventFns[i] is undefined
eventFns[i].call(element, event);

var printFn = function (docType, element) {/*some code*/}

<button class="btn btn-default btn-column" print-button-spinner doc-type="zebraCurLabels" print="printFn(docType, null)">
 </button>

App.directive('printButtonSpinner', function() {
        return {
            scope:
            {
                docType: '@',
                print: '&'
            },

            restrict: 'A',

            link: function (scope, element) {
                var print = scope.test;
                element.bind('click', print(scope.docType, element));
            }
        };
    });

TypeError: eventFns[i] is undefined
eventFns[i].call(element, event);

element.bind('click', function(){
              print(scope.docType, element);
            });