nes-emu/helpers/createTestContext.js

A NES emulator

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = createTestContext;
var _NES = _interopRequireDefault(require("../NES"));
var _config = _interopRequireDefault(require("../config"));
var _fs = _interopRequireDefault(require("fs"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
/** Creates an execution context for testing. */
function createTestContext() {
  let initialize = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : () => {};
  const romBytes = _fs.default.readFileSync(_config.default.NESTEST_PATH);
  const nes = new _NES.default();
  nes.load(romBytes);
  const context = nes.context;
  initialize(context);
  context.memory = context.cpu.memory;
  context.context = context;
  nes.onLoad(context);
  return context;
}