<!-- webkit-test-runner [ LayoutFormattingContextEnabled=true LayoutFormattingContextIntegrationEnabled=false ] -->
<style>
.left {
  float: left;
  width: 100px;
  height: 40px;
}

.right {
  float: right;
  width: 50px;
  height: 10px;
}

.avoider {
  width: auto;
  height: 60px;
  background-color: green;
}
</style>
<div style="width: 300px; height: 300px; padding: 1px;">
  <div class=left></div>
  <div class=right></div>
  <div class=avoider style="clear: left"></div>
  <div class=left style="height: 60px"></div>
  <div class=right style="height: 40px"></div>
  <div class=avoider style="clear: right"></div>
  <div class=left style="height: 40px"></div>
  <div class=right style="height: 30px"></div>
  <div class=avoider style="clear: both"></div>
</div>