Add specific tests for requests.

While requests isn't instrumented directly, we do instrument it via urllib3.
These tests do a basic verification of that.

Author: tim-schilling

tests/integration/instruments/test_requests.py

@@ -0,0 +1,52 @@
+# coding=utf-8
+"""
+Test requests package is instrumented via urllib3 instrumentation.
+
+We don't instrument the package directly, but urllib3 underneath.
+However, it's a good idea to verify it's working as expected.
+"""
+from __future__ import absolute_import, division, print_function, unicode_literals
+
+import httpretty
+import requests
+
+from scout_apm.instruments.urllib3 import ensure_installed
+
+
+def test_request(tracked_request):
+    ensure_installed()
+    with httpretty.enabled(allow_net_connect=False):
+        httpretty.register_uri(
+            httpretty.GET, "https://example.com/", body="Hello World!"
+        )
+
+        session = requests.Session()
+        response = session.get("https://example.com")
+
+    assert response.status_code == 200
+    assert response.content == b"Hello World!"
+    assert len(tracked_request.complete_spans) == 1
+    span = tracked_request.complete_spans[0]
+    assert span.operation == "HTTP/GET"
+    assert span.tags["url"] == "https://example.com:443/"
+
+
+def test_second_request(tracked_request):
+    ensure_installed()
+    with tracked_request.span("Test"), httpretty.enabled(allow_net_connect=False):
+        httpretty.register_uri(
+            httpretty.GET, "https://example.com/foo", body="Hello World!"
+        )
+        httpretty.register_uri(
+            httpretty.GET, "https://example.org/bar", body="Hello World!"
+        )
+        session = requests.Session()
+        session.get("https://example.com/foo")
+        session.get("https://example.org/bar")
+    assert len(tracked_request.complete_spans) == 3
+    assert (
+        tracked_request.complete_spans[0].tags["url"] == "https://example.com:443/foo"
+    )
+    assert (
+        tracked_request.complete_spans[1].tags["url"] == "https://example.org:443/bar"
+    )