<!DOCTYPE html>
<link rel="author" title="David Grogan" href="mailto:dgrogan@chromium.org">
<link rel="help" href="https://drafts.csswg.org/css-flexbox/#intrinsic-sizes">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/check-layout-th.js"></script>
<meta name="assert"
  content="min-content width is calculated correctly in a variety of scenarios with multiple flex items" />

<style>
  .zero-width {
    width: 0px;
    height: 100px;
    margin-bottom: 20px;
  }

  .floating-flexbox {
    display: flex;
    outline: 5px solid blue;
    height: 100px;
    float: left;
  }

  .floating-flexbox>div:nth-child(1) {
    background: yellow;
  }

  .floating-flexbox>div:nth-child(2) {
    background: orange;
  }

  .floating-flexbox>div:nth-child(3) {
    background: lightblue;
  }

  .floating-flexbox>div>div {
    width: 100px;
  }
</style>

<body onload="checkLayout('.floating-flexbox')">
  <div id="log"></div>

  <div class="zero-width">
    <div class="floating-flexbox" data-expected-width="200">
      <!-- min contribution: 100 -->
      <!-- desired fraction: -0.5 -->
      <!-- chosen fraction <=0 and desired fraction <=0 and item can shrink, so it contributes its min-content contribution -->
      <div style="flex: 1 1 200px; width:50px; min-width:0px;">
        <div></div>
      </div>
      <!-- chosen fraction <=0 and desired fraction <=0 and item can shrink, so it contributes its min-content contribution -->
      <div style="flex: 1 1 400px; width:50px;">
        <div></div>
      </div>
    </div>
  </div>

  <div class="zero-width">
    <div class="floating-flexbox" data-expected-width="200">
      <!-- min contribution: 100 -->
      <!-- min contribution - flex basis: -100 -->
      <!-- desired fraction: -0.5 -->
      <!-- chosen fraction <=0 and desired fraction <=0 and item can shrink, so it contributes its min-content contribution -->
      <div style="flex: 1 1 200px; width:50px;">
        <div></div>
      </div>
      <!-- min contribution: 100 -->
      <!-- min contribution - flex basis: -300 -->
      <!-- desired fraction: -300/(2*400) = -0.375 -->
      <!-- chosen fraction <=0 and desired fraction <=0 and item can shrink, so it contributes its min-content contribution -->
      <div style="flex: 1 2 400px; width:50px;">
        <div></div>
      </div>
    </div>
  </div>

  <!-- This is same as above except for min-width auto is no longer in
      effect. EdgeHTML renders it differently than the above. -->
  <div class="zero-width">
    <div class="floating-flexbox" data-expected-width="200">
      <div style="flex: 1 1 200px; width:50px; min-width: 0px;">
        <div></div>
      </div>
      <div style="flex: 1 2 400px; width:50px; min-width: 0px;">
        <div></div>
      </div>
    </div>
  </div>

  <div class="zero-width">
    <!-- first item contributes 200px. second item contributes 100px -->
    <div class="floating-flexbox" data-expected-width="300">
      <!-- min contribution: 100 -->
      <!-- desired fraction: -inf -->
      <!-- chosen fraction <= 0 and item can't shrink, so contribute flex basis -->
      <div style="flex: 1 0 200px; width:50px;">
        <div></div>
      </div>
      <!-- min contribution: 100 -->
      <!-- desired fraction: -0.75 -->
      <!-- chosen fraction <= 0 and item CAN shrink, so contribute min contribution -->
      <div style="flex: 1 1 400px; width:50px;">
        <div></div>
      </div>
    </div>
  </div>

  <div class="zero-width">
    <div class="floating-flexbox" data-expected-width="200">
      <!-- min contribution: 200 -->
      <!-- min contribution - flex basis: 150 -->
      <!-- desired fraction: 0 (because flex grow factor is 0) -->
      <!-- chosen fraction <= 0 so contribute flex basis 50px -->
      <!-- except flex basis is outside of used min/max, so contribute clamped flex basis = 100px -->
      <div style="flex: 0 0 50px; width: 200px;">
        <div></div>
      </div>
      <!-- identical to above -->
      <div style="flex: 0 0 50px; width: 200px;">
        <div></div>
      </div>
    </div>
  </div>

  <div class="zero-width">
    <!-- 200 + 400 = 600 -->
    <div class="floating-flexbox" data-expected-width="600">
      <!-- min contribution: 200 -->
      <!-- desired fraction: 150px -->
      <!-- 50 + 1*150 = 200 -->
      <div style="flex: 1 0 50px; width: 200px;">
        <div></div>
      </div>
      <!-- min contribution: 200 -->
      <!-- desired fraction: 100px -->
      <!-- 100 + 2*150 = 400 -->
      <div style="flex: 2 0 100px; width: 200px;">
        <div></div>
      </div>
    </div>
  </div>

  <div class="zero-width">
    <!-- chosen fraction: 50px -->
    <div class="floating-flexbox" data-expected-width="400">
      <!-- min contribution: 100 -->
      <!-- desired fraction: -0.5 -->
      <!-- final contribution = flex base size + product = 200px + 50px*0 = 200px -->
      <div style="flex: 0 1 200px; width: 50px;">
        <div></div>
      </div>
      <!-- min contribution: 200 -->
      <!-- desired fraction: (200px - 100px) / 2 = 50px -->
      <!-- final contribution = flex base size + product = 100px + 50px*2 = 200px -->
      <div style="flex: 2 0 100px; width: 200px;">
        <div></div>
      </div>
    </div>
  </div>
<div class="zero-width">
  <!-- chosen fraction: 0 -->
  <div class="floating-flexbox" data-expected-width="600">
    <!-- min contribution: 250 -->
    <!-- wants to grow, but can't -->
    <!-- desired fraction: 0 -->
    <!-- final contribution: 100 -->
    <div style="flex: 0 1 100px; width: 250px;"></div>
    <!-- min contribution: 100 -->
    <!-- wants to shrink, but can't -->
    <!-- desired fraction: -inf -->
    <!-- final contribution: 200 -->
    <div style="flex: 1 0 200px; width: 100px;"></div>
    <!-- min contribution:  -->
    <!-- doesn't have to change --->
    <!-- desired fraction: 0 -->
    <!-- final contribution: 300 -->
    <div style="flex: 1 1 300px; width: 300px;"></div>
  </div>
</div>

<div class="zero-width">
  <!-- chosen fraction: 0 -->
  <div class="floating-flexbox" data-expected-width="700">
    <!-- min contribution: 100 -->
    <!-- wants to shrink, but can't -->
    <!-- desired fraction: -inf -->
    <!-- final contribution: 200 -->
    <!-- In legacy and V2, this item gets 0 width. -->
    <div style="flex: 0 10 300px; width: 200px;"></div>
    <!-- min contribution:  -->
    <!-- doesn't have to change --->
    <!-- desired fraction: 0 -->
    <!-- final contribution: 300 -->
    <!-- In legacy and V2, this item gets all the width. -->
    <div style="flex: 0 1 1000px; width: 500px;">
    </div>
  </div>
</div>

</body>
