Adding metrics test

Author: leandrodamascena

noxfile.py

@@ -60,3 +60,16 @@ def test_with_only_required_packages(session: nox.Session):
             f"{PREFIX_TESTS_FUNCTIONAL}/metrics/provider/",
         ],
     )
+
+
+@nox.session()
+def test_with_datadog_as_required_package(session: nox.Session):
+    """Tests that depends on Datadog library"""
+    # Metrics - Datadog
+    build_and_run_test(
+        session,
+        folders=[
+            f"{PREFIX_TESTS_FUNCTIONAL}/metrics/datadog/",
+        ],
+        extras="datadog",
+    )

tests/functional/metrics/datadog/test_metrics_datadog.py

@@ -3,7 +3,6 @@
 from collections import namedtuple
 
 import pytest
-from test_metrics_provider import capture_metrics_output
 
 from aws_lambda_powertools.metrics.exceptions import MetricValueError, SchemaValidationError
 from aws_lambda_powertools.metrics.provider.cold_start import reset_cold_start_flag
@@ -40,7 +39,7 @@ def test_datadog_write_to_log_with_env_variable(capsys, monkeypatch):
     # WHEN we add a metric
     metrics.add_metric(name="item_sold", value=1, product="latte", order="online")
     metrics.flush_metrics()
-    logs = capture_metrics_output(capsys)
+    logs = json.loads(capsys.readouterr().out.strip())
 
     # THEN metrics is flushed to log
     logs["e"] = ""