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I am trying to produce some test to be able to better understand how to test DOM events with the bination of Mocha, Chai, Sinon and jQuery. I want to check that the alert function is correctly triggered on a click of the div element. I know that the setup of the HTML element is correct jQuery, but I'm not entirely sure how to produce a passing test for the code below. What's particularly strange is that I get a dialogue appearing on opening the HTML file in my browser, so I know the line '$('#thingy').trigger('click')' is doing what I'd expect. I am currently getting the following, 'TypeError: object is not a function'

Relevant section from my test file, tests.js

describe('DOM tests - div element', function() {
$("body").append("<div id='thingy'>hello world</div>")
$('#thingy').attr('class', 'thingy');
$('#thingy').click(function() { alert( "I've been clicked!" ); });


it('should have called alert function', function () {
  var spy = sinon.spy(alert);
  $('#thingy').trigger('click')
  sinon.assert(spy.called);
});

My HTML file is fairly standard, index.html

<!doctype html>
<html>
<head>
    <title>Tests</title>
    <link rel="stylesheet" href="mocha.css" />
    <script src=".11.1.min.js"></script>
</head>
<body>
    <div id="mocha"></div>
    <script src="mocha.js"></script>
    <script src="chai.js"></script>
    <script src="sinon-1.10.2.js"></script>
    <script>
        mocha.ui('bdd');
        mocha.reporter('html');
        var expect = chai.expect;
    </script>
    <script src="tests.js"></script>
    <script>
        mocha.run();
    </script>
</body>

I am trying to produce some test to be able to better understand how to test DOM events with the bination of Mocha, Chai, Sinon and jQuery. I want to check that the alert function is correctly triggered on a click of the div element. I know that the setup of the HTML element is correct jQuery, but I'm not entirely sure how to produce a passing test for the code below. What's particularly strange is that I get a dialogue appearing on opening the HTML file in my browser, so I know the line '$('#thingy').trigger('click')' is doing what I'd expect. I am currently getting the following, 'TypeError: object is not a function'

Relevant section from my test file, tests.js

describe('DOM tests - div element', function() {
$("body").append("<div id='thingy'>hello world</div>")
$('#thingy').attr('class', 'thingy');
$('#thingy').click(function() { alert( "I've been clicked!" ); });


it('should have called alert function', function () {
  var spy = sinon.spy(alert);
  $('#thingy').trigger('click')
  sinon.assert(spy.called);
});

My HTML file is fairly standard, index.html

<!doctype html>
<html>
<head>
    <title>Tests</title>
    <link rel="stylesheet" href="mocha.css" />
    <script src="http://code.jquery./jquery-1.11.1.min.js"></script>
</head>
<body>
    <div id="mocha"></div>
    <script src="mocha.js"></script>
    <script src="chai.js"></script>
    <script src="sinon-1.10.2.js"></script>
    <script>
        mocha.ui('bdd');
        mocha.reporter('html');
        var expect = chai.expect;
    </script>
    <script src="tests.js"></script>
    <script>
        mocha.run();
    </script>
</body>

  • javascript
  • bdd
  • mocha.js
  • sinon
  • chai
Share Improve this question asked Jun 4, 2014 at 13:25 tpgmartintpgmartin 3451 gold badge4 silver badges13 bronze badges 2
  • Just a few minor things: Do you close the function in the describe's second parameter? Also, you're missing a semicolon after .append("<div id='thingy'>....</div>") and .trigger('click') – David Sherret Commented Jun 4, 2014 at 13:39
  • Yes I do close the describe function, which isn't clear, and I've added the semicolons as suggested. Cheers – tpgmartin Commented Jun 4, 2014 at 13:50
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1 Answer 1

Reset to default 7

You're not actually calling an alert function, you're calling the window.alert function, so you need to spy on that:

it('should have called alert function', function () {
  var _savedAlert = window.alert; 

  try {
    var spy = sinon.spy(window, 'alert');
    $('#thingy').trigger('click');
    sinon.assert.called(spy);
   } 

  finally { window.alert = _savedAlert; }
});

本文标签： bddTesting JavaScript Click Event with SinonStack Overflow

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