[DevTools] New harness for inspector-protocol layout tests

third_party/WebKit/LayoutTests/inspector-protocol/animation/animation-zero-duration.js

Index: third_party/WebKit/LayoutTests/inspector-protocol/animation/animation-zero-duration.js
diff --git a/third_party/WebKit/LayoutTests/inspector-protocol/animation/animation-zero-duration.js b/third_party/WebKit/LayoutTests/inspector-protocol/animation/animation-zero-duration.js
new file mode 100644
index 0000000000000000000000000000000000000000..d39a9402091440248e08eb4da5f3f2a587f188c9
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/inspector-protocol/animation/animation-zero-duration.js
@@ -0,0 +1,27 @@
+(async function(testRunner) {
+  let {page, session, dp} = await testRunner.startHTML(`
+    <style type='text/css'>
+    #node.anim {
+        animation: anim 0 ease-in-out;
+    }
+
+    @keyframes anim {
+        from {
+            width: 100px;
+        }
+        to {
+            width: 200px;
+        }
+    }
+    </style>
+    <div id='node' style='background-color: red; width: 100px'></div>
+  `, '');
+
+  dp.Animation.enable();
+  session.evaluate('node.classList.add("anim")');
+  await dp.Animation.onceAnimationCreated();
+  testRunner.log('Animation created');
+  await dp.Animation.onceAnimationStarted();
+  testRunner.log('Animation started');
+  testRunner.completeTest();
+})