lass="identifier">op2</span><span class="special">(</span><span class="identifier">i</span><span class="special">,</span> <span class="identifier">j</span><span class="special">));</span>
    <span class="special">}</span>
  <span class="special">}</span>
<span class="special">}</span>
</pre>
<p>
          In case of failure, in order to see in the logs at which point of the loops
          the failure occurred, we need some extra information in the assertion,
          which can be achieved for instance <a