         <div id="c1" class="fixed-height"></div>
          <div id="c2" class="fixed-height"></div>
          <div id="c3" class="fixed-height"></div>
        </div>
      </template>
    </test-fixture>

    <test-fixture id="single-child">
      <template>
        <div class="container layout">
          <div id="c1"></div>
        </div>
      </template>
    </test-fixture>

    <test-fixture id="positioning">
      <template>
        <div class="container layout relative">
          <div id="c1"></div