HtmlAssertjs

HtmlAssertjs is a Javascript DSL based assertion API to assert HTML path and content.

Huh? What?

Let's imagine you have some HTML content

<div id="someId">
  <p class="someClass">
     <span>text</span>
  </p>
</div>

And you have a (javascript) test that needs to verify that you actually have :

• a <div> tag with an id attribute having the "someId" value.
• inside this <div>, a <p> tag with a class attribute having the "someClass" value.
• inside this <p>, a <span> tag.

HtmlAssertjs is the answer to this problem by providing an easy API that will let you write such assertions.

HtmlAssertjs uses a DSL based interface, using methods chaining, in order to allow to write tests that are as explicit as possible. Testing the above HTML code would be done like this :

htmlassert.that("it tests a passing div", htmlToTest.contains.div("id", "someid").p("class","someClass").span());

Quickstart

1. Include the library in your project:

   npm install htmlassertjs --save-dep

2. This is how we write a simple test:

   var htmlassert = require("htmlassertjs");

   var html = "<div class="someclass" id="someid">";

   var htmlToTest = htmlassert.containing(html); htmlassert.that("it tests some basic HTML", htmlToTest.contains.p().div("id", "someid", "class", "someclass") );

3. You do two main steps : providing the HTML, then calling the assertions

   var htmlToTest = htmlassert.containing(html);

by calling the containing(html) method, you create an object that contains the HTML.

then you can call the assertions on this object, by calling the that method

htmlassert.that("it tests some assertion", 
                 htmlToTest.contains.p().div().span()
               );

At this point, you can call several assertions on the same html object, e.g.:

var htmlToTest = htmlassert.containing(html);

htmlassert.that("it tests some assertion number 1", 
                 htmlToTest.contains.p().div().span()
               );
htmlassert.that("it tests some assertion number 2", 
                 htmlToTest.contains.p().span()
               );

4. By default, the assertion is lenient, it means that if you do not need to include all tags in your assertion:

   var htmlassert = require("htmlassertjs");

   var html = "<div class="someclass">";

   var htmlToTest = htmlassert.containing(html); htmlassert.that("it tests some basic HTML", htmlToTest.contains.p().div("id", "someid", "class", "someclass").span() ); htmlassert.that("it tests some basic HTML leniently", htmlToTest.contains.p().span() );

both of those assertions will work, even the second where you did not indicated the <div> tag.

Note : A strict mode will be implemented

5. Testing the attributes of a tag is sometimes heavy, so you can use a wildcard

   var html = "<div style="font-size: 150%; color: red;">"; htmlassert.that("it tests some attributes with a wildcard", htmlToTest.contains.div("style", "font-size:color:") );

Problems?

I'm not an expert in Javascript, so if you have any feedback, you're welcome to do it, please raise a issue on github : HtmlAssertjs issues and comments

Contributing

The tests are included in the test directory and are using casperjs.

• You need casperjs v1.1.x installed (globally)
• then install the node modules : npm install
• then execute the tests : grunt test

The code is in the lib directory