Add metrics qualifiers for structs that inject metrics

app/app.go

@@ -14,7 +14,7 @@ type App struct {
 	IncomingRouter route.Router      `inject:"inline"`
 	PeerRouter     route.Router      `inject:"inline"`
 	Collector      collect.Collector `inject:""`
-	Metrics        metrics.Metrics   `inject:""`
+	Metrics        metrics.Metrics   `inject:"metrics"`
 
 	// Version is the build ID for Refinery so that the running process may answer
 	// requests for the version

app/app_test.go

@@ -185,7 +185,7 @@ func newStartedApp(
 		&inject.Object{Value: &transmit.DefaultTransmission{LibhClient: peerClient, Name: "peer_"}, Name: "peerTransmission"},
 		&inject.Object{Value: shrdr},
 		&inject.Object{Value: collector},
-		&inject.Object{Value: metricsr},
+		&inject.Object{Value: metricsr, Name: "metrics"},
 		&inject.Object{Value: "test", Name: "version"},
 		&inject.Object{Value: samplerFactory},
 		&inject.Object{Value: &a},

collect/collect.go

@@ -51,7 +51,7 @@ type InMemCollector struct {
 	Config         config.Config          `inject:""`
 	Logger         logger.Logger          `inject:""`
 	Transmission   transmit.Transmission  `inject:"upstreamTransmission"`
-	Metrics        metrics.Metrics        `inject:""`
+	Metrics        metrics.Metrics        `inject:"metrics"`
 	SamplerFactory *sample.SamplerFactory `inject:""`
 
 	// For test use only

collect/collect_test.go

@@ -8,6 +8,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/facebookgo/inject"
 	lru "github.com/hashicorp/golang-lru"
 	"github.com/stretchr/testify/assert"
 
@@ -569,3 +570,21 @@ func TestAddSpanNoBlock(t *testing.T) {
 	err = coll.AddSpanFromPeer(span)
 	assert.Error(t, err)
 }
+
+func TestDependencyInjection(t *testing.T) {
+	var g inject.Graph
+	err := g.Provide(
+		&inject.Object{Value: &InMemCollector{}},
+		&inject.Object{Value: &config.MockConfig{}},
+		&inject.Object{Value: &logger.NullLogger{}},
+		&inject.Object{Value: &transmit.MockTransmission{}, Name: "upstreamTransmission"},
+		&inject.Object{Value: &metrics.NullMetrics{}, Name: "metrics"},
+		&inject.Object{Value: &sample.SamplerFactory{}},
+	)
+	if err != nil {
+		t.Error(err)
+	}
+	if err := g.Populate(); err != nil {
+		t.Error(err)
+	}
+}

route/route.go

@@ -62,7 +62,7 @@ type Router struct {
 	PeerTransmission     transmit.Transmission `inject:"peerTransmission"`
 	Sharder              sharder.Sharder       `inject:""`
 	Collector            collect.Collector     `inject:""`
-	Metrics              metrics.Metrics       `inject:""`
+	Metrics              metrics.Metrics       `inject:"metrics"`
 
 	// version is set on startup so that the router may answer HTTP requests for
 	// the version

route/route_test.go

@@ -7,13 +7,6 @@ import (
 	"compress/gzip"
 	"context"
 	"fmt"
-	"github.com/honeycombio/refinery/config"
-	collectortrace "github.com/honeycombio/refinery/internal/opentelemetry-proto-gen/collector/trace/v1"
-	common "github.com/honeycombio/refinery/internal/opentelemetry-proto-gen/common/v1"
-	trace "github.com/honeycombio/refinery/internal/opentelemetry-proto-gen/trace/v1"
-	"github.com/honeycombio/refinery/logger"
-	"github.com/honeycombio/refinery/metrics"
-	"github.com/honeycombio/refinery/transmit"
 	"io"
 	"io/ioutil"
 	"math"
@@ -23,6 +16,16 @@ import (
 	"testing"
 	"time"
 
+	"github.com/facebookgo/inject"
+	"github.com/honeycombio/refinery/collect"
+	"github.com/honeycombio/refinery/config"
+	collectortrace "github.com/honeycombio/refinery/internal/opentelemetry-proto-gen/collector/trace/v1"
+	common "github.com/honeycombio/refinery/internal/opentelemetry-proto-gen/common/v1"
+	trace "github.com/honeycombio/refinery/internal/opentelemetry-proto-gen/trace/v1"
+	"github.com/honeycombio/refinery/logger"
+	"github.com/honeycombio/refinery/metrics"
+	"github.com/honeycombio/refinery/transmit"
+
 	"github.com/gorilla/mux"
 	"github.com/honeycombio/refinery/sharder"
 	"github.com/klauspost/compress/zstd"
@@ -441,6 +444,28 @@ func TestOTLPHandler(t *testing.T) {
 	})
 }
 
+func TestDependencyInjection(t *testing.T) {
+	var g inject.Graph
+	err := g.Provide(
+		&inject.Object{Value: &Router{}},
+
+		&inject.Object{Value: &config.MockConfig{}},
+		&inject.Object{Value: &logger.NullLogger{}},
+		&inject.Object{Value: http.DefaultTransport, Name: "upstreamTransport"},
+		&inject.Object{Value: &transmit.MockTransmission{}, Name: "upstreamTransmission"},
+		&inject.Object{Value: &transmit.MockTransmission{}, Name: "peerTransmission"},
+		&inject.Object{Value: &TestSharder{}},
+		&inject.Object{Value: &collect.InMemCollector{}},
+		&inject.Object{Value: &metrics.NullMetrics{}, Name: "metrics"},
+	)
+	if err != nil {
+		t.Error(err)
+	}
+	if err := g.Populate(); err != nil {
+		t.Error(err)
+	}
+}
+
 func helperOTLPRequestSpansWithoutStatus() []*trace.Span {
 	now := time.Now()
 	return []*trace.Span{

sample/sample.go

@@ -17,7 +17,7 @@ type Sampler interface {
 type SamplerFactory struct {
 	Config  config.Config   `inject:""`
 	Logger  logger.Logger   `inject:""`
-	Metrics metrics.Metrics `inject:""`
+	Metrics metrics.Metrics `inject:"metrics"`
 }
 
 // GetSamplerImplementationForDataset returns the sampler implementation for the dataset,

sample/sample_test.go

@@ -1,3 +1,29 @@
 // +build all race
 
 package sample
+
+import (
+	"testing"
+
+	"github.com/facebookgo/inject"
+	"github.com/honeycombio/refinery/config"
+	"github.com/honeycombio/refinery/logger"
+	"github.com/honeycombio/refinery/metrics"
+)
+
+func TestDependencyInjection(t *testing.T) {
+	var g inject.Graph
+	err := g.Provide(
+		&inject.Object{Value: &SamplerFactory{}},
+
+		&inject.Object{Value: &config.MockConfig{}},
+		&inject.Object{Value: &logger.NullLogger{}},
+		&inject.Object{Value: &metrics.NullMetrics{}, Name: "metrics"},
+	)
+	if err != nil {
+		t.Error(err)
+	}
+	if err := g.Populate(); err != nil {
+		t.Error(err)
+	}
+}

transmit/transmit.go

@@ -31,7 +31,7 @@ const (
 type DefaultTransmission struct {
 	Config     config.Config   `inject:""`
 	Logger     logger.Logger   `inject:""`
-	Metrics    metrics.Metrics `inject:""`
+	Metrics    metrics.Metrics `inject:"metrics"`
 	Version    string          `inject:"version"`
 	LibhClient *libhoney.Client
 

transmit/transmit_test.go

@@ -5,6 +5,7 @@ package transmit
 import (
 	"testing"
 
+	"github.com/facebookgo/inject"
 	"github.com/honeycombio/refinery/config"
 	"github.com/honeycombio/refinery/logger"
 	"github.com/honeycombio/refinery/metrics"
@@ -27,3 +28,21 @@ func TestDefaultTransmissionUpdatesUserAgentAdditionAfterStart(t *testing.T) {
 	assert.Nil(t, err)
 	assert.Equal(t, libhoney.UserAgentAddition, "refinery/test")
 }
+
+func TestDependencyInjection(t *testing.T) {
+	var g inject.Graph
+	err := g.Provide(
+		&inject.Object{Value: &DefaultTransmission{}},
+
+		&inject.Object{Value: &config.MockConfig{}},
+		&inject.Object{Value: &logger.NullLogger{}},
+		&inject.Object{Value: &metrics.NullMetrics{}, Name: "metrics"},
+		&inject.Object{Value: "test", Name: "version"},
+	)
+	if err != nil {
+		t.Error(err)
+	}
+	if err := g.Populate(); err != nil {
+		t.Error(err)
+	}
+}