chore: a bit more defense in depth

Author: apiarian-datadog

datadog_lambda/dogstatsd.py

@@ -97,7 +97,7 @@ def _serialize_metric(self, metric, metric_type, value, tags, timestamp):
             value,
             metric_type,
             ("|#" + ",".join(self.normalize_tags(tags))) if tags else "",
-            ("|T" + str(timestamp)) if timestamp is not None else "",
+            ("|T" + str(int(timestamp))) if timestamp is not None else "",
         )
 
     def _report(self, metric, metric_type, value, tags, timestamp):

tests/test_dogstatsd.py

@@ -53,3 +53,7 @@ def test_distribution_with_tags(self):
     def test_distribution_with_timestamp(self):
         statsd.distribution("my.test.timestamp.metric", 9, timestamp=123456789)
         self._checkOnlyOneMetric("my.test.timestamp.metric:9|d|T123456789")
+
+    def test_distribution_with_float_timestamp(self):
+        statsd.distribution("my.test.timestamp.metric", 9, timestamp=123456789.123)
+        self._checkOnlyOneMetric("my.test.timestamp.metric:9|d|T123456789")