web-audio-test-api/lib/decorators/methods/contract.js

Web Audio API test library for CI

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = contract;
function contract(_ref) {
  var precondition = _ref.precondition;
  var postcondition = _ref.postcondition;

  return function (target, name, descriptor) {
    var func = descriptor.value;

    descriptor.value = function contract() {
      if (typeof precondition === "function") {
        try {
          precondition.call.apply(precondition, [this].concat(Array.prototype.slice.call(arguments)));
        } catch (e) {
          e.message = this.constructor.name + "#" + name + "; " + e.message;
          throw e;
        }
      }

      var res = func.call.apply(func, [this].concat(Array.prototype.slice.call(arguments)));

      if (typeof postcondition === "function") {
        try {
          postcondition.call(this, res);
        } catch (e) {
          e.message = this.constructor.name + "#" + name + "; " + e.message;
          throw e;
        }
      }

      return res;
    };

    return descriptor;
  };
}