fix tests, add module files

go.mod

@@ -0,0 +1,16 @@
+module github.com/Remitly/chi-prometheus
+
+require (
+	github.com/766b/chi-prometheus v0.0.0-20180509160047-46ac2b31aa30
+	github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973 // indirect
+	github.com/go-chi/chi v3.3.3+incompatible
+	github.com/golang/protobuf v1.2.0 // indirect
+	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
+	github.com/prometheus/client_golang v0.8.0
+	github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910 // indirect
+	github.com/prometheus/common v0.0.0-20180801064454-c7de2306084e // indirect
+	github.com/prometheus/procfs v0.0.0-20180920065004-418d78d0b9a7 // indirect
+	golang.org/x/net v0.0.0-20180926154720-4dfa2610cdf3 // indirect
+	golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f // indirect
+	golang.org/x/text v0.3.0 // indirect
+)

go.sum

@@ -0,0 +1,24 @@
+github.com/766b/chi-prometheus v0.0.0-20180509160047-46ac2b31aa30 h1:bNHbCMKiQxpRNe4Pk2W09N1aXXc4ICOawQFKIDEicqc=
+github.com/766b/chi-prometheus v0.0.0-20180509160047-46ac2b31aa30/go.mod h1:X/LhbmoBoRu8TxoGIOIraVNhfz3hhikJoaelrOuhdPY=
+github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973 h1:xJ4a3vCFaGF/jqvzLMYoU8P317H5OQ+Via4RmuPwCS0=
+github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
+github.com/go-chi/chi v3.3.3+incompatible h1:KHkmBEMNkwKuK4FdQL7N2wOeB9jnIx7jR5wsuSBEFI8=
+github.com/go-chi/chi v3.3.3+incompatible/go.mod h1:eB3wogJHnLi3x/kFX2A+IbTBlXxmMeXJVKy9tTv1XzQ=
+github.com/golang/protobuf v1.2.0 h1:P3YflyNX/ehuJFLhxviNdFxQPkGK5cDcApsge1SqnvM=
+github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/matttproud/golang_protobuf_extensions v1.0.1 h1:4hp9jkHxhMHkqkrB3Ix0jegS5sx/RkqARlsWZ6pIwiU=
+github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5Ld7szi9bcBfOoFv/3dc6xSMkL2PC0=
+github.com/prometheus/client_golang v0.8.0 h1:1921Yw9Gc3iSc4VQh3PIoOqgPCZS7G/4xQNVUp8Mda8=
+github.com/prometheus/client_golang v0.8.0/go.mod h1:7SWBe2y4D6OKWSNQJUaRYU/AaXPKyh/dDVn+NZz0KFw=
+github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910 h1:idejC8f05m9MGOsuEi1ATq9shN03HrxNkD/luQvxCv8=
+github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910/go.mod h1:MbSGuTsp3dbXC40dX6PRTWyKYBIrTGTE9sqQNg2J8bo=
+github.com/prometheus/common v0.0.0-20180801064454-c7de2306084e h1:n/3MEhJQjQxrOUCzh1Y3Re6aJUUWRp2M9+Oc3eVn/54=
+github.com/prometheus/common v0.0.0-20180801064454-c7de2306084e/go.mod h1:daVV7qP5qjZbuso7PdcryaAu0sAZbrN9i7WWcTMWvro=
+github.com/prometheus/procfs v0.0.0-20180920065004-418d78d0b9a7 h1:NgR6WN8nQ4SmFC1sSUHY8SriLuWCZ6cCIQtH4vDZN3c=
+github.com/prometheus/procfs v0.0.0-20180920065004-418d78d0b9a7/go.mod h1:c3At6R/oaqEKCNdg8wHV1ftS6bRYblBhIjjI8uT2IGk=
+golang.org/x/net v0.0.0-20180926154720-4dfa2610cdf3 h1:dgd4x4kJt7G4k4m93AYLzM8Ni6h2qLTfh9n9vXJT3/0=
+golang.org/x/net v0.0.0-20180926154720-4dfa2610cdf3/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f h1:wMNYb4v58l5UBM7MYRLPG6ZhfOqbKu7X5eyFl8ZhKvA=
+golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=

middleware.go

@@ -13,11 +13,6 @@ var (
 	dflBuckets = []float64{300, 1200, 5000}
 )
 
-const (
-	reqsName    = "chi_requests_total"
-	latencyName = "chi_request_duration_milliseconds"
-)
-
 // Middleware is a handler that exposes prometheus metrics for the number of requests,
 // the latency and the response size, partitioned by status code, method and HTTP path.
 type Middleware struct {
@@ -30,7 +25,7 @@ func NewMiddleware(name string, buckets ...float64) func(next http.Handler) http
 	var m Middleware
 	m.reqs = prometheus.NewCounterVec(
 		prometheus.CounterOpts{
-			Name:        reqsName,
+			Name:        name + "_requests_total",
 			Help:        "How many HTTP requests processed, partitioned by status code, method and HTTP path.",
 			ConstLabels: prometheus.Labels{"service": name},
 		},
@@ -42,7 +37,7 @@ func NewMiddleware(name string, buckets ...float64) func(next http.Handler) http
 		buckets = dflBuckets
 	}
 	m.latency = prometheus.NewHistogramVec(prometheus.HistogramOpts{
-		Name:        latencyName,
+		Name:        name + "_duration_milliseconds",
 		Help:        "How long it took to process the request, partitioned by status code, method and HTTP path.",
 		ConstLabels: prometheus.Labels{"service": name},
 		Buckets:     buckets,

middleware_test.go

@@ -36,10 +36,10 @@ func Test_Logger(t *testing.T) {
 	n.ServeHTTP(recorder, req1)
 	n.ServeHTTP(recorder, req2)
 	body := recorder.Body.String()
-	if !strings.Contains(body, reqsName) {
-		t.Errorf("body does not contain request total entry '%s'", reqsName)
+	if !strings.Contains(body, "test_requests_total") {
+		t.Errorf("body does not contain request total entry '%s'", "test_requests_total")
 	}
-	if !strings.Contains(body, latencyName) {
-		t.Errorf("body does not contain request duration entry '%s'", reqsName)
+	if !strings.Contains(body, "test_duration_milliseconds") {
+		t.Errorf("body does not contain request duration entry '%s'", "test_duration_milliseconds")
 	}
 }