import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

layout/reftests/svg/smil/anim-svg-preserveAspectRatio-01.svg

@@ -0,0 +1,40 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="setTimeAndSnapshot(1, true)">
+  <title>Test animation of the "preserveAspectRatio" attribute on the "svg" element</title>
+  <script xlink:href="smil-util.js" type="text/javascript"/>
+  <rect width="100%" height="100%" fill="lime"/>
+
+  <!-- 40% through animation simple duration -
+       tests that the animation doesn't affect the element too early -->
+  <svg width="100" height="50" viewBox="0 0 100 100"
+       preserveAspectRatio="xMidYMid meet">
+    <!-- this should change the referencing element at 1.25s,
+         causing the red rect to stretch to fill its whole viewport -->
+    <animate attributeName="preserveAspectRatio"
+             calcMode="discrete"
+             begin="0s" dur="2.5s"
+             from="xMidYMid meet"
+             to="xMidYMid slice"
+             fill="freeze"/>
+    <rect width="100%" height="100%" fill="red"/>
+  </svg>
+  <rect x="25" width="50" height="50" fill="lime"/>
+
+  <!-- 50% through animation simple duration -
+       tests that the animation affects the element now -->
+  <rect y="50" width="100" height="50" fill="red"/>
+  <svg y="50" width="100" height="50" viewBox="0 0 100 100"
+       preserveAspectRatio="xMidYMid meet">
+    <!-- this should change the referencing element at 1s,
+         causing the lime rect to stretch to fill its whole viewport -->
+    <animate attributeName="preserveAspectRatio"
+             calcMode="discrete"
+             begin="0s" dur="2s"
+             from="xMidYMid meet"
+             to="xMidYMid slice"
+             fill="freeze"/>
+    <rect width="100%" height="100%" fill="lime"/>
+  </svg>
+</svg>