1 files changed, 48 insertions, 0 deletions
diff --git a/deps/v8/test/inspector/heap-profiler/sampling-heap-profiler.js b/deps/v8/test/inspector/heap-profiler/sampling-heap-profiler.js
new file mode 100644
index 0000000000..1b82a46fa2
--- /dev/null
+++ b/deps/v8/test/inspector/heap-profiler/sampling-heap-profiler.js
@@ -0,0 +1,48 @@
+// Copyright 2017 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --sampling-heap-profiler-suppress-randomness
+
+(async function() {
+  let {contextGroup, Protocol} = InspectorTest.start('Checks sampling heap profiler methods.');
+
+  contextGroup.addScript(`
+    var holder = [];
+    function allocateChunk() {
+      holder.push(new Array(100000).fill(42));
+    }
+    //# sourceURL=test.js`);
+
+  Protocol.HeapProfiler.enable();
+
+  const profile0 = await Protocol.HeapProfiler.getSamplingProfile();
+  InspectorTest.log('Expected error: ' + profile0.error.message);
+
+  await Protocol.HeapProfiler.startSampling();
+  const profile1 = await Protocol.HeapProfiler.getSamplingProfile();
+  const size1 = nodeSize(profile1.result.profile.head);
+  InspectorTest.log('Allocated size is zero in the beginning:', size1 === 0);
+
+  await Protocol.Runtime.evaluate({ expression: 'allocateChunk()' });
+  const profile2 = await Protocol.HeapProfiler.getSamplingProfile();
+  const size2 = nodeSize(profile2.result.profile.head);
+  InspectorTest.log('Allocated size is more than 100KB after a chunk is allocated:', size2 > 100000);
+
+  await Protocol.Runtime.evaluate({ expression: 'allocateChunk()' });
+  const profile3 = await Protocol.HeapProfiler.getSamplingProfile();
+  const size3 = nodeSize(profile3.result.profile.head);
+  InspectorTest.log('Allocated size increased after one more chunk is allocated:', size3 > size2);
+
+  const profile4 = await Protocol.HeapProfiler.stopSampling();
+  const size4 = nodeSize(profile4.result.profile.head);
+  InspectorTest.log('Allocated size did not change after stopping:', size4 === size3);
+
+  InspectorTest.log('Successfully finished');
+  InspectorTest.completeTest();
+
+  function nodeSize(node) {
+    return node.children.reduce((res, child) => res + nodeSize(child),
+                                node.callFrame.functionName === 'allocateChunk' ? node.selfSize : 0);
+  }
+})();