     </h5>
<p>
        On the Nth operation, the class will fail with the specified error code,
        or the default error code of <a class="link" href="boost__beast__test__error.html" title="test::error"><code class="computeroutput"><span class="identifier">error</span><span class="special">::</span><span class="identifier">test_failure</span></code></a>. Instances of this
        class may be used to build objects which are specifically designed to aid
        in writing unit tests, for interfaces which