Add responsiveness_metric for timeline_based_measurement

tools/telemetry/telemetry/core/timeline/event_unittest.py

Index: tools/telemetry/telemetry/core/timeline/event_unittest.py
diff --git a/tools/telemetry/telemetry/core/timeline/event_unittest.py b/tools/telemetry/telemetry/core/timeline/event_unittest.py
index 2c80c32146bb8c52ecb460142ac81c5bc5b7d340..1583b06340842a90dc1ae7949d821785961750cb 100644
--- a/tools/telemetry/telemetry/core/timeline/event_unittest.py
+++ b/tools/telemetry/telemetry/core/timeline/event_unittest.py
@@ -4,5 +4,38 @@
 
 import unittest
 
+from telemetry.core.timeline import event as event_module
+
+
 class TimelineEventTest(unittest.TestCase):
-  pass
+
+  def testGetOverlappedTimeDurationWithRange(self):
+    # A test event starts at 40 and ends at 80 in wall time.
+    event = event_module.TimelineEvent('Test', 'foo', 40, 40, 30, 30)
+    # Non overlapped range on the left of event.
+    self.assertEquals(event.GetOverlappedTimeDurationWithRange(10, 20), 0)
+    # Non overlapped range on the right of event.
+    self.assertEquals(event.GetOverlappedTimeDurationWithRange(90, 100), 0)
+    # Overlapped range on the left of event.
+    self.assertEquals(event.GetOverlappedTimeDurationWithRange(30, 70), 30)
+    # Overlapped range in the middle of event.
+    self.assertEquals(event.GetOverlappedTimeDurationWithRange(50, 70), 20)
+    # Overlapped range on the left of event.
+    self.assertEquals(event.GetOverlappedTimeDurationWithRange(70, 90), 10)
+
+  def testGetOverlappedThreadTimeDurationWithRange(self):
+    # Make a event starts at 30ms and ends at 60ms in thread time
+    event = event_module.TimelineEvent('Test', 'foo', 40, 40, 30, 30)
+    # Non overlapped range on the left of event.
+    self.assertEquals(event.GetOverlappedThreadTimeDurationWithRange(10, 20), 0)
+    # Non overlapped range on the right of event.
+    self.assertEquals(event.GetOverlappedThreadTimeDurationWithRange(70, 90), 0)
+    # Overlapped range on the left of event.
+    self.assertEquals(
+      event.GetOverlappedThreadTimeDurationWithRange(20, 50), 20)
+    # Overlapped range in the middle of event.
+    self.assertEquals(
+      event.GetOverlappedThreadTimeDurationWithRange(40, 50), 10)
+    # Overlapped range on the left of event.
+    self.assertEquals(
+      event.GetOverlappedThreadTimeDurationWithRange(50, 90), 10)