1 files changed, 31 insertions, 0 deletions
diff --git a/deps/v8/test/mjsunit/tools/timeline.mjs b/deps/v8/test/mjsunit/tools/timeline.mjs
new file mode 100644
index 0000000000..07fd605992
--- /dev/null
+++ b/deps/v8/test/mjsunit/tools/timeline.mjs
@@ -0,0 +1,31 @@
+// Copyright 2020 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.
+
+import { Timeline } from "../../../tools/system-analyzer/timeline.mjs";
+import { Event } from "../../../tools/system-analyzer/log/log.mjs";
+
+
+(function testTimeline() {
+  let timeline = new Timeline();
+  let id1 = "0x3e7e082470cd";
+  let id2 = "0x3e7e082470ad";
+  let time = 12;
+  let event1 = new Event(id1, time);
+  let event2 = new Event(id1, time + 1);
+  let event3 = new Event(id1, time + 2);
+  let event4 = new Event(id1, time + 3);
+  let event5 = new Event(id2, time + 3);
+  timeline.push(event1);
+  timeline.push(event2);
+  timeline.push(event3);
+  timeline.push(event4);
+  timeline.push(event5);
+  let startTime = time;
+  let endTime = time + 2;
+  timeline.selectTimeRange(startTime, endTime);
+  assertArrayEquals(timeline.selection, [event1, event2, event3]);
+  let entryIdx = timeline.find(time + 1);
+  let entry = timeline.at(entryIdx);
+  assertEquals(entry.time, time + 1);
+})();