warriorjs-engine/test/abilities/actions/Shoot.js

The bowels of WarriorJS

import chai from 'chai';
import sinon from 'sinon';
import Shoot from '../../../src/abilities/actions/Shoot';

chai.should();

describe('Shoot', function () {
  beforeEach(function () {
    this.shooter = {
      position: {
        getRelativeSpace: () => null,
      },
      shootPower: 2,
      say: () => null,
    };
    this.shoot = new Shoot(this.shooter);
  });

  it('should shoot only first unit', function () {
    const receiver = {
      isAlive: () => true,
      takeDamage: () => null,
    };
    const other = {
      isAlive: () => true,
      takeDamage: () => null,
    };
    const receiverExpectation = this.sinon.mock(receiver).expects('takeDamage').withArgs(2);
    const otherExpectation = this.sinon.mock(other).expects('takeDamage').never();
    const shootExpectation = this.sinon
      .mock(this.shoot)
      .expects('_getUnits')
      .withArgs('forward', sinon.match.any)
      .returns([receiver, other]);
    this.shoot.perform();
    receiverExpectation.verify();
    otherExpectation.verify();
    shootExpectation.verify();
  });

  it('should shoot and do nothing if no units in the way', function () {
    const expectation = this.sinon
      .mock(this.shoot)
      .expects('_getUnits')
      .withArgs('forward', sinon.match.any)
      .returns([null, null]);
    this.shoot.perform.bind(this.shoot).should.not.throw(Error);
    expectation.verify();
  });
});