Add test

test/unit/instruments/net_http_test.rb

@@ -22,6 +22,14 @@ def test_request_scout_description_for_uri
     assert_equal '/here', Net::HTTP.new('').request_scout_description(req)
   end
 
+  def test_instruments_http
+    recorder = FakeRecorder.new
+    ScoutApm::Agent.instance.context.recorder = recorder
+
+    Net::HTTP.get_response(URI('https://example.com'))
+    assert_recorded(recorder, "HTTP", "request", "example.com/")
+  end
+
   def test_request_scout_description_for_addressable
     req = Net::HTTP::Get.new(Addressable::URI.parse('http://example.org/here'))
     assert_equal '/here', Net::HTTP.new('').request_scout_description(req)
@@ -34,4 +42,14 @@ def test_installs_using_proper_method
       assert_equal false, Net::HTTP.ancestors.include?(ScoutApm::Instruments::NetHttpInstrumentationPrepend)
     end
   end
+
+  private
+
+  def assert_recorded(recorder, type, name, desc = nil)
+    req = recorder.requests.first
+    assert req, "recorder recorded no layers"
+    assert_equal type, req.root_layer.type
+    assert_equal name, req.root_layer.name
+    assert_equal desc, req.root_layer.desc if !desc.nil?
+  end
 end