
    <div></div><div></div><div></div>
</div>

<h3>flex-flow: default, orange box has width: auto, flex-box has box-sizing: border-box</h3>
<div class="flexbox border-box">
    <div data-expected-width=30></div>
    <div data-expected-width=30></div>
    <div data-expected-width=30></div>
</div>

<h3>flex-flow: column, red box has height: 300px</h3>
<div class="flexbox column" style="height: 300px">
    <div></div><div></div><div></div>
</div>

<h3>flex-flow: column, red box has height: 400px</h3>
<div clas