Przykład 3.7. weryfikacja wyjątków

<!DOCTYPE html>
<html>

<head>
  <link data-require="jasmine@2.4.1" data-semver="2.4.1" rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/jasmine/2.4.1/jasmine.css" />
  <script data-require="jasmine@2.4.1" data-semver="2.4.1" src="https://cdnjs.cloudflare.com/ajax/libs/jasmine/2.4.1/jasmine.js"></script>
  <script data-require="jasmine@2.4.1" data-semver="2.4.1" src="https://cdnjs.cloudflare.com/ajax/libs/jasmine/2.4.1/jasmine-html.js"></script>
  <script data-require="jasmine@2.4.1" data-semver="2.4.1" src="https://cdnjs.cloudflare.com/ajax/libs/jasmine/2.4.1/boot.js"></script>
  <script src="car.js"></script>
  <script src="car.spec.js"></script>
</head>

<body>
  <h1>Hello Jasmine!</h1>
</body>

</html>

Car = (function () {
  function Car (engine) {
    if (!engine) {
      throw new TypeError('Engine type argument is required')
    }
    
    this.engine = engine;
    this.driver = null;
    this._passengers = [];
  }

  Car.prototype.drive = function (speed) {
    if (typeof speed !== "number" || speed < 1) {
      throw RangeError('Invalid driving speed');
    }
    
    this._lastSpeed = speed;
    return 'Car with ' + this.engine + ' engine ' + 
      'drives at ' + speed + ' km/h.';
  }

  Object.defineProperty(Car.prototype, 'lastSpeed', {
    get: function () { 
      return this._lastSpeed ? this._lastSpeed : 0; 
    },
    enumerable: false,
    configurable: true
  });
  
  Car.prototype.addPassenger = function (passenger) {
    this._passengers.push(passenger);
  }
  
  Car.prototype.getPassengers = function () {
    return this._passengers;
  }

  return Car;
})();

'use strict';

describe('Car class', function () {
  it('should throw exception when no engine is specified', function () {
    expect(Car).toThrowError('Engine type argument is required');
  });
  
  describe('drive method', function () {
    var car;
    
    beforeEach(function () {
      car = new Car('V8');
    });
    
    it('should throw exception when no speed is provided', function () {
      expect(function () { car.drive(); }).toThrowError(RangeError, 'Invalid driving speed');
    });
    
    it('should throw exception when speed type is invalid', function () {
      expect(function () { car.drive('120'); }).toThrowError(RangeError, 'Invalid driving speed');
    });
    
    it('should throw exception when speed value is invalid', function () {
      expect(car.drive.bind(null, -10)).toThrowError(RangeError, 'Invalid driving speed');
    });
  });
});