Fix the unit tests.

src/caduceus/caduceus_test.go

@@ -53,10 +53,14 @@ func TestMuxServerConfig(t *testing.T) {
 		return errors.New("time out!")
 	}
 
+	fakeEmptyRequests := new(mockCounter)
+	fakeEmptyRequests.On("Add", mock.AnythingOfType("float64")).Return().Times(0)
+
 	serverWrapper := &ServerHandler{
 		Logger:          logger,
 		caduceusHandler: fakeHandler,
 		caduceusHealth:  fakeHealth,
+		emptyRequests:   fakeEmptyRequests,
 		doJob:           forceTimeOut,
 	}
 

src/caduceus/http_test.go

@@ -45,10 +45,14 @@ func TestServerHandler(t *testing.T) {
 		return nil
 	}
 
+	fakeEmptyRequests := new(mockCounter)
+	fakeEmptyRequests.On("Add", mock.AnythingOfType("float64")).Return().Times(0)
+
 	serverWrapper := &ServerHandler{
 		Logger:          logger,
 		caduceusHandler: fakeHandler,
 		caduceusHealth:  fakeHealth,
+		emptyRequests:   fakeEmptyRequests,
 		doJob:           requestSuccessful,
 	}
 

src/caduceus/mocks_test.go

@@ -19,6 +19,7 @@ package main
 import (
 	"github.com/Comcast/webpa-common/health"
 	"github.com/Comcast/webpa-common/webhook"
+	"github.com/go-kit/kit/metrics"
 	"github.com/stretchr/testify/mock"
 	"net/http"
 	"time"
@@ -116,3 +117,17 @@ func (m *mockServerProfiler) Report() (values []interface{}) {
 func (m *mockServerProfiler) Close() {
 	m.Called()
 }
+
+// mockCounter provides the mock implementation of the metrics.Counter object
+type mockCounter struct {
+	mock.Mock
+}
+
+func (m *mockCounter) Add(delta float64) {
+	m.Called(delta)
+}
+
+func (m *mockCounter) With(labelValues ...string) metrics.Counter {
+	m.Called(labelValues)
+	return nil
+}