xpath search for class and text - combine two xpath selector
<p>I know there are tousands of simple question about xpath but i dont get it how to combine two not too simple expressions...</p>

<p>My xml structure:</p>

<pre><code>&lt;div class="some-container"&gt;
    &lt;div class="btn  btn-blue"&gt;
        &lt;div class="btn-text"&gt;&lt;!-- Select by class --&gt;
            &lt;span&gt; &lt;!-- Select by text--&gt;
                Download
            &lt;/span&gt;
        &lt;/div&gt;
    &lt;/div&gt;
&lt;/div&gt;
</code></pre>

<hr>

<p><strong>Select by class</strong></p>

<p>I know achieved to select the div by searching after the class:</p>

<pre><code>//*/div[contains(concat(' ', @class, ' '), ' btn-text')]
</code></pre>

<hr>

<p><strong>Select by text</strong></p>

<p>To select also the span i know i can simply add <code>/span</code> but then i want to select by text. 
For that usecase i got the xpath (<a href="https://stackoverflow.com/a/2994336">form here</a>): </p>

<pre><code>//*/text()[normalize-space(.)='Download']/parent::*
</code></pre>

<hr>

<p>Those selector both are working properly but i want to combine them</p>

<ol>
<li>Search for class "btn"</li>
<li>Search for text inside span that exactly matches </li>
</ol>

<p>I tried to concat like that but that dont work <a href="http://www.xpathtester.com/xpath/48f08aa3038aecfb38e99f2ba5911543" rel="nofollow noreferrer">test-example</a>:</p>

<pre><code>//div[contains(concat(' ', @class, ' '), ' btn-text')]/text()[normalize-space(.)='Download']/parent::*
</code></pre>

<p>even if it'd work there is no selecting by span tag</p>

<p>Anyone who could help?</p>