Failures

Failures are indicated by adding a class="failure" attribute to the element, and replacing the contents with a <del> and <ins> elements containing the expected value and the actual value respectively.

Example

<p concordion:assertEquals="acronym">ABC</p>

When marked as a failure, with acroynm returning XYZ, it becomes:

<p concordion:assertEquals="acronym" class="failure">
  <del class="expected">ABC</del>
  <ins class="actual">XYZ</ins>
</p>

Note: The underscores indicate line continuations for readability only. They are not output. In reality, it is all in one long line.

Further Details

What if the item is empty or contains only whitespace?
What happens to nested elements?
How are <a> elements handled?
How are elements like <table>, <tr> and <ul> handled? (These cannot legally have <span> elements as children).
OUT OF SCOPE. Rationale: The assertEquals command isn't intended for these elements.