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BUG=b:233893248
TEST=CQ

Change-Id: I66591d7a738d241aed3290138c0f68065ab10a6d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/3879174
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Tested-by: Alex Klein <saklein@chromium.org>
diff --git a/api/metrics_unittest.py b/api/metrics_unittest.py
index 9530213..c3378a9 100644
--- a/api/metrics_unittest.py
+++ b/api/metrics_unittest.py
@@ -13,78 +13,95 @@
 
 
 class MetricsTest(cros_test_lib.TestCase):
-  """Test Metrics deserialization functionality at the API layer."""
+    """Test Metrics deserialization functionality at the API layer."""
 
-  def testDeserializeTimer(self):
-    """Test timer math and deserialization into proto objects."""
-    response = build_api_test_pb2.TestResultMessage()
-    mock_events = [
-        metrics_lib.MetricEvent(
-            600, 'a.b', metrics_lib.OP_START_TIMER, arg='100'),
-        metrics_lib.MetricEvent(
-            1000, 'a.b', metrics_lib.OP_STOP_TIMER, arg='100'),
-    ]
-    with mock.patch(
-        'chromite.api.metrics.metrics_lib.read_metrics_events',
-        return_value=mock_events):
-      api_metrics.deserialize_metrics_log(response.events)
-      self.assertEqual(len(response.events), 1)
-      self.assertEqual(response.events[0].name, 'a.b')
-      self.assertEqual(response.events[0].timestamp_milliseconds, 1000)
-      self.assertEqual(response.events[0].duration_milliseconds, 1000 - 600)
+    def testDeserializeTimer(self):
+        """Test timer math and deserialization into proto objects."""
+        response = build_api_test_pb2.TestResultMessage()
+        mock_events = [
+            metrics_lib.MetricEvent(
+                600, "a.b", metrics_lib.OP_START_TIMER, arg="100"
+            ),
+            metrics_lib.MetricEvent(
+                1000, "a.b", metrics_lib.OP_STOP_TIMER, arg="100"
+            ),
+        ]
+        with mock.patch(
+            "chromite.api.metrics.metrics_lib.read_metrics_events",
+            return_value=mock_events,
+        ):
+            api_metrics.deserialize_metrics_log(response.events)
+            self.assertEqual(len(response.events), 1)
+            self.assertEqual(response.events[0].name, "a.b")
+            self.assertEqual(response.events[0].timestamp_milliseconds, 1000)
+            self.assertEqual(
+                response.events[0].duration_milliseconds, 1000 - 600
+            )
 
-  def testDeserializeNamedEvent(self):
-    """Test deserialization of a named event.
+    def testDeserializeNamedEvent(self):
+        """Test deserialization of a named event.
 
-    This test also includes a prefix to test for proper prepending.
-    """
-    response = build_api_test_pb2.TestResultMessage()
-    mock_events = [
-        metrics_lib.MetricEvent(
-            1000, 'a.named_event', metrics_lib.OP_NAMED_EVENT, arg=None),
-    ]
-    with mock.patch(
-        'chromite.api.metrics.metrics_lib.read_metrics_events',
-        return_value=mock_events):
-      api_metrics.deserialize_metrics_log(response.events, prefix='prefix')
-      self.assertEqual(len(response.events), 1)
-      self.assertEqual(response.events[0].name, 'prefix.a.named_event')
-      self.assertEqual(response.events[0].timestamp_milliseconds, 1000)
-      self.assertFalse(response.events[0].duration_milliseconds)
+        This test also includes a prefix to test for proper prepending.
+        """
+        response = build_api_test_pb2.TestResultMessage()
+        mock_events = [
+            metrics_lib.MetricEvent(
+                1000, "a.named_event", metrics_lib.OP_NAMED_EVENT, arg=None
+            ),
+        ]
+        with mock.patch(
+            "chromite.api.metrics.metrics_lib.read_metrics_events",
+            return_value=mock_events,
+        ):
+            api_metrics.deserialize_metrics_log(
+                response.events, prefix="prefix"
+            )
+            self.assertEqual(len(response.events), 1)
+            self.assertEqual(response.events[0].name, "prefix.a.named_event")
+            self.assertEqual(response.events[0].timestamp_milliseconds, 1000)
+            self.assertFalse(response.events[0].duration_milliseconds)
 
-  def testDeserializeGauge(self):
-    """Test deserialization of a gauge."""
-    response = build_api_test_pb2.TestResultMessage()
-    mock_events = [
-        metrics_lib.MetricEvent(1000, 'a.gauge', metrics_lib.OP_GAUGE, arg=17),
-    ]
-    with mock.patch(
-        'chromite.api.metrics.metrics_lib.read_metrics_events',
-        return_value=mock_events):
-      api_metrics.deserialize_metrics_log(response.events)
-      self.assertEqual(len(response.events), 1)
-      self.assertEqual(response.events[0].name, 'a.gauge')
-      self.assertEqual(response.events[0].timestamp_milliseconds, 1000)
-      self.assertEqual(response.events[0].gauge, 17)
+    def testDeserializeGauge(self):
+        """Test deserialization of a gauge."""
+        response = build_api_test_pb2.TestResultMessage()
+        mock_events = [
+            metrics_lib.MetricEvent(
+                1000, "a.gauge", metrics_lib.OP_GAUGE, arg=17
+            ),
+        ]
+        with mock.patch(
+            "chromite.api.metrics.metrics_lib.read_metrics_events",
+            return_value=mock_events,
+        ):
+            api_metrics.deserialize_metrics_log(response.events)
+            self.assertEqual(len(response.events), 1)
+            self.assertEqual(response.events[0].name, "a.gauge")
+            self.assertEqual(response.events[0].timestamp_milliseconds, 1000)
+            self.assertEqual(response.events[0].gauge, 17)
 
-  def testDeserializeCounter(self):
-    """Test deserialization of a counter."""
-    response = build_api_test_pb2.TestResultMessage()
-    mock_events = [
-        metrics_lib.MetricEvent(
-            1000, 'a.counter', metrics_lib.OP_INCREMENT_COUNTER, arg=1),
-        metrics_lib.MetricEvent(
-            1001, 'a.counter', metrics_lib.OP_INCREMENT_COUNTER, arg=2),
-        metrics_lib.MetricEvent(
-            1002, 'a.counter', metrics_lib.OP_INCREMENT_COUNTER, arg=3),
-        metrics_lib.MetricEvent(
-            1003, 'a.counter', metrics_lib.OP_DECREMENT_COUNTER, arg=4),
-    ]
-    with mock.patch(
-        'chromite.api.metrics.metrics_lib.read_metrics_events',
-        return_value=mock_events):
-      api_metrics.deserialize_metrics_log(response.events)
-      self.assertEqual(len(response.events), 1)
-      self.assertEqual(response.events[0].name, 'a.counter')
-      self.assertEqual(response.events[0].timestamp_milliseconds, 1003)
-      self.assertEqual(response.events[0].gauge, 2)
+    def testDeserializeCounter(self):
+        """Test deserialization of a counter."""
+        response = build_api_test_pb2.TestResultMessage()
+        mock_events = [
+            metrics_lib.MetricEvent(
+                1000, "a.counter", metrics_lib.OP_INCREMENT_COUNTER, arg=1
+            ),
+            metrics_lib.MetricEvent(
+                1001, "a.counter", metrics_lib.OP_INCREMENT_COUNTER, arg=2
+            ),
+            metrics_lib.MetricEvent(
+                1002, "a.counter", metrics_lib.OP_INCREMENT_COUNTER, arg=3
+            ),
+            metrics_lib.MetricEvent(
+                1003, "a.counter", metrics_lib.OP_DECREMENT_COUNTER, arg=4
+            ),
+        ]
+        with mock.patch(
+            "chromite.api.metrics.metrics_lib.read_metrics_events",
+            return_value=mock_events,
+        ):
+            api_metrics.deserialize_metrics_log(response.events)
+            self.assertEqual(len(response.events), 1)
+            self.assertEqual(response.events[0].name, "a.counter")
+            self.assertEqual(response.events[0].timestamp_milliseconds, 1003)
+            self.assertEqual(response.events[0].gauge, 2)