Add tests

Author: bmermet

tests/contrib/django/test_tracing_disabled.py

@@ -0,0 +1,34 @@
+# 3rd party
+from django.apps import apps
+from django.test import TestCase, override_settings
+
+# project
+from ddtrace.tracer import Tracer
+from ddtrace.contrib.django.conf import settings
+
+# testing
+from ...test_tracer import DummyWriter
+
+
+class DjangoTracingDisabledTest(TestCase):
+    def test_nothing_is_written(self):
+        tracer = Tracer()
+        tracer.writer = DummyWriter()
+        # Backup the old conf
+        backupTracer = settings.TRACER
+        backupEnabled = settings.ENABLED
+        # Disable tracing
+        settings.ENABLED = False
+        settings.TRACER = tracer
+        # Restart the app
+        app = apps.get_app_config('datadog_django')
+        app.ready()
+
+        traces = tracer.writer.pop_traces()
+        assert len(traces) == 0
+        services = tracer.writer.pop_services()
+        assert len(services) == 0
+
+        # Reset the original settings
+        settings.ENABLED = backupEnabled
+        settings.TRACER = backupTracer