wrapMethod: function wrapMethod()

in bower_modules/sinonjs/sinon.js [511:557]

• 26 lines of code
• 8 McCabe index (conditional complexity)

        wrapMethod: function wrapMethod(object, property, method) {
            if (!object) {
                throw new TypeError("Should wrap property of object");
            }

            if (typeof method != "function") {
                throw new TypeError("Method wrapper should be function");
            }

            var wrappedMethod = object[property];

            if (!isFunction(wrappedMethod)) {
                throw new TypeError("Attempted to wrap " + (typeof wrappedMethod) + " property " +
                                    property + " as function");
            }

            if (wrappedMethod.restore && wrappedMethod.restore.sinon) {
                throw new TypeError("Attempted to wrap " + property + " which is already wrapped");
            }

            if (wrappedMethod.calledBefore) {
                var verb = !!wrappedMethod.returns ? "stubbed" : "spied on";
                throw new TypeError("Attempted to wrap " + property + " which is already " + verb);
            }

            // IE 8 does not support hasOwnProperty on the window object.
            var owned = hasOwn.call(object, property);
            object[property] = method;
            method.displayName = property;

            method.restore = function () {
                // For prototype properties try to reset by delete first.
                // If this fails (ex: localStorage on mobile safari) then force a reset
                // via direct assignment.
                if (!owned) {
                    delete object[property];
                }
                if (object[property] === method) {
                    object[property] = wrappedMethod;
                }
            };

            method.restore.sinon = true;
            mirrorProperties(method, wrappedMethod);

            return method;
        },