nes-emu/cpu/instructions/logical.spec.js

A NES emulator

"use strict";

var _ = _interopRequireDefault(require("."));
var _createTestContext = _interopRequireDefault(require("../../helpers/createTestContext"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
const should = require("chai").Should();
describe("instructions", () => {
  describe("logical", () => {
    let cpu, context;
    beforeEach(() => {
      ({
        cpu,
        context
      } = (0, _createTestContext.default)());
    });
    [{
      instruction: "AND",
      value1: 0b10100100,
      value2: 0b10000100,
      result: 0b10000100,
      zero: false,
      negative: true
    }, {
      instruction: "EOR",
      value1: 0b00100100,
      value2: 0b00010100,
      result: 0b00110000,
      zero: false,
      negative: false
    }, {
      instruction: "EOR",
      value1: 0b11111111,
      value2: 0b11111111,
      result: 0b00000000,
      zero: true,
      negative: false
    }, {
      instruction: "ORA",
      value1: 0b00100100,
      value2: 0b00010100,
      result: 0b00110100,
      zero: false,
      negative: false
    }].forEach(_ref => {
      let {
        instruction,
        value1,
        value2,
        result,
        zero,
        negative
      } = _ref;
      describe(instruction, () => {
        it("stores the right result", () => {
          cpu.registers.a.value = value1;
          _.default[instruction].execute(context, value2);
          cpu.registers.a.value.should.equal(result);
          cpu.flags.z = zero;
          cpu.flags.n = negative;
        });
      });
    });
  });
});