Add responsiveness_metric for timeline_based_measurement

tools/telemetry/telemetry/web_perf/metrics/timeline_based_metric_unittest.py

Index: tools/telemetry/telemetry/web_perf/metrics/timeline_based_metric_unittest.py
diff --git a/tools/telemetry/telemetry/web_perf/metrics/timeline_based_metric_unittest.py b/tools/telemetry/telemetry/web_perf/metrics/timeline_based_metric_unittest.py
new file mode 100644
index 0000000000000000000000000000000000000000..a2a176e2e20cdd0365de82f089ea8d424db1cc82
--- /dev/null
+++ b/tools/telemetry/telemetry/web_perf/metrics/timeline_based_metric_unittest.py
@@ -0,0 +1,27 @@
+# Copyright 2014 The Chromium 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 unittest
+
+import telemetry.web_perf.metrics.timeline_based_metric as tbm_module
+
+class TimelineBasedMetricTest(unittest.TestCase):
+
+  # pylint: disable=W0212
+  def testTimeRangesHasOverlap(self):
+    # Test cases with overlap on one side
+    self.assertTrue(tbm_module._TimeRangesHasOverlap([(10, 20), (5, 15)]))
+    self.assertTrue(tbm_module._TimeRangesHasOverlap([(5, 15), (10, 20)]))
+    self.assertTrue(tbm_module._TimeRangesHasOverlap(
+      [(5, 15), (25, 30), (10, 20)]))
+
+    # Test cases with one range fall in the middle of other
+    self.assertTrue(tbm_module._TimeRangesHasOverlap([(10, 20), (15, 18)]))
+    self.assertTrue(tbm_module._TimeRangesHasOverlap([(15, 18), (10, 20)]))
+    self.assertTrue(tbm_module._TimeRangesHasOverlap(
+      [(15, 18), (40, 50), (10, 20)]))
+
+    self.assertFalse(tbm_module._TimeRangesHasOverlap([(15, 18), (20, 25)]))
+    self.assertFalse(tbm_module._TimeRangesHasOverlap(
+      [(1, 2), (2, 3), (0, 1)]))