Simple Jasmine Unit Test Example with passing tests

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    <title>Jasmine Spec Runner</title>
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    <script type="text/javascript" src="Calculator.js"></script>
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    <script type="text/javascript" src="Calculator.spec.js"></script>
    
    
    <script type="text/javascript">
    (function() {
      var jasmineEnv = jasmine.getEnv();
      jasmineEnv.updateInterval = 1000;

      var htmlReporter = new jasmine.HtmlReporter();

      jasmineEnv.addReporter(htmlReporter);

      jasmineEnv.specFilter = function(spec) {
        return htmlReporter.specFilter(spec);
      };

      var currentWindowOnload = window.onload;

      window.onload = function() {
        if (currentWindowOnload) {
          currentWindowOnload();
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        execJasmine();
      };

      function execJasmine() {
        jasmineEnv.execute();
      }

    })();
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function Calculator() {
}

Calculator.prototype.add = function() {
  var operands = Array.prototype.slice.call(arguments);
  var sum = 0;
  for(var i = 0; i < operands.length; i++) {
    sum += operands[i];
  }
  
  return sum;
}

describe('Given the Calculator', function() {
  var calc = new Calculator();
  var sum;

  it('Then it contains an add method', function() {
    expect(calc.add).toBeDefined();
  });

  describe('When I add two numbers', function() {

    it('Then the I get the correct answer', function() {
      sum = calc.add(1, 2);
      expect(sum).toBe(3);
    });
  });

  describe('When I add three numbers', function() {

    it('Then the I get the correct answer', function() {
      sum = calc.add(1, 2, 7);
      expect(sum).toBe(10);
    });
  });
});