Make oteltest.SpanRecorder into a concrete type

CHANGELOG.md

@@ -8,6 +8,11 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 
 ## [Unreleased]
 
+### Changed
+
+- Replaced interface `oteltest.SpanRecorder` with its existing implementation
+  `StandardSpanRecorder` (#1542).
+
 ### Added
 
 - Added `resource.Default()` for use with meter and tracer providers. (#1507)

bridge/opencensus/bridge_test.go

@@ -28,7 +28,7 @@ import (
 )
 
 func TestMixedAPIs(t *testing.T) {
-	sr := new(oteltest.StandardSpanRecorder)
+	sr := new(oteltest.SpanRecorder)
 	tp := oteltest.NewTracerProvider(oteltest.WithSpanRecorder(sr))
 	tracer := tp.Tracer("mixedapitracer")
 	octrace.DefaultTracer = NewTracer(tracer)
@@ -74,7 +74,7 @@ func TestMixedAPIs(t *testing.T) {
 }
 
 func TestStartOptions(t *testing.T) {
-	sr := new(oteltest.StandardSpanRecorder)
+	sr := new(oteltest.SpanRecorder)
 	tp := oteltest.NewTracerProvider(oteltest.WithSpanRecorder(sr))
 	octrace.DefaultTracer = NewTracer(tp.Tracer("startoptionstracer"))
 
@@ -94,7 +94,7 @@ func TestStartOptions(t *testing.T) {
 }
 
 func TestStartSpanWithRemoteParent(t *testing.T) {
-	sr := new(oteltest.StandardSpanRecorder)
+	sr := new(oteltest.SpanRecorder)
 	tp := oteltest.NewTracerProvider(oteltest.WithSpanRecorder(sr))
 	tracer := tp.Tracer("remoteparent")
 	octrace.DefaultTracer = NewTracer(tracer)
@@ -117,7 +117,7 @@ func TestStartSpanWithRemoteParent(t *testing.T) {
 }
 
 func TestToFromContext(t *testing.T) {
-	sr := new(oteltest.StandardSpanRecorder)
+	sr := new(oteltest.SpanRecorder)
 	tp := oteltest.NewTracerProvider(oteltest.WithSpanRecorder(sr))
 	tracer := tp.Tracer("tofromcontext")
 	octrace.DefaultTracer = NewTracer(tracer)
@@ -158,7 +158,7 @@ func TestToFromContext(t *testing.T) {
 }
 
 func TestIsRecordingEvents(t *testing.T) {
-	sr := new(oteltest.StandardSpanRecorder)
+	sr := new(oteltest.SpanRecorder)
 	tp := oteltest.NewTracerProvider(oteltest.WithSpanRecorder(sr))
 	octrace.DefaultTracer = NewTracer(tp.Tracer("isrecordingevents"))
 
@@ -170,7 +170,7 @@ func TestIsRecordingEvents(t *testing.T) {
 }
 
 func TestSetThings(t *testing.T) {
-	sr := new(oteltest.StandardSpanRecorder)
+	sr := new(oteltest.SpanRecorder)
 	tp := oteltest.NewTracerProvider(oteltest.WithSpanRecorder(sr))
 	octrace.DefaultTracer = NewTracer(tp.Tracer("setthings"))
 

internal/global/trace_test.go

@@ -35,7 +35,7 @@ func TestTraceWithSDK(t *testing.T) {
 	// This is started before an SDK was registered and should be dropped.
 	_, span1 := tracer1.Start(ctx, "span1")
 
-	sr := new(oteltest.StandardSpanRecorder)
+	sr := new(oteltest.SpanRecorder)
 	tp := oteltest.NewTracerProvider(oteltest.WithSpanRecorder(sr))
 	otel.SetTracerProvider(tp)
 

oteltest/config.go

@@ -46,7 +46,7 @@ type config struct {
 	SpanContextFunc func(context.Context) trace.SpanContext
 
 	// SpanRecorder keeps track of spans.
-	SpanRecorder SpanRecorder
+	SpanRecorder *SpanRecorder
 }
 
 func newConfig(opts ...Option) config {
@@ -80,7 +80,7 @@ func WithSpanContextFunc(f func(context.Context) trace.SpanContext) Option {
 }
 
 type spanRecorderOption struct {
-	SpanRecorder SpanRecorder
+	SpanRecorder *SpanRecorder
 }
 
 func (o spanRecorderOption) Apply(c *config) {
@@ -89,22 +89,13 @@ func (o spanRecorderOption) Apply(c *config) {
 
 // WithSpanRecorder sets the SpanRecorder to use with the TracerProvider for
 // testing.
-func WithSpanRecorder(sr SpanRecorder) Option {
+func WithSpanRecorder(sr *SpanRecorder) Option {
 	return spanRecorderOption{sr}
 }
 
 // SpanRecorder performs operations to record a span as it starts and ends.
-type SpanRecorder interface {
-	// OnStart is called by the Tracer when it starts a Span.
-	OnStart(span *Span)
-	// OnEnd is called by the Span when it ends.
-	OnEnd(span *Span)
-}
-
-// StandardSpanRecorder is a SpanRecorder that records all started and ended
-// spans in an ordered recording. StandardSpanRecorder is designed to be
-// concurrent safe and can by used by multiple goroutines.
-type StandardSpanRecorder struct {
+// It is designed to be concurrent safe and can by used by multiple goroutines.
+type SpanRecorder struct {
 	startedMu sync.RWMutex
 	started   []*Span
 
@@ -113,21 +104,21 @@ type StandardSpanRecorder struct {
 }
 
 // OnStart records span as started.
-func (ssr *StandardSpanRecorder) OnStart(span *Span) {
+func (ssr *SpanRecorder) OnStart(span *Span) {
 	ssr.startedMu.Lock()
 	defer ssr.startedMu.Unlock()
 	ssr.started = append(ssr.started, span)
 }
 
 // OnEnd records span as completed.
-func (ssr *StandardSpanRecorder) OnEnd(span *Span) {
+func (ssr *SpanRecorder) OnEnd(span *Span) {
 	ssr.doneMu.Lock()
 	defer ssr.doneMu.Unlock()
 	ssr.done = append(ssr.done, span)
 }
 
 // Started returns a copy of all started Spans in the order they were started.
-func (ssr *StandardSpanRecorder) Started() []*Span {
+func (ssr *SpanRecorder) Started() []*Span {
 	ssr.startedMu.RLock()
 	defer ssr.startedMu.RUnlock()
 	started := make([]*Span, len(ssr.started))
@@ -138,7 +129,7 @@ func (ssr *StandardSpanRecorder) Started() []*Span {
 }
 
 // Completed returns a copy of all ended Spans in the order they were ended.
-func (ssr *StandardSpanRecorder) Completed() []*Span {
+func (ssr *SpanRecorder) Completed() []*Span {
 	ssr.doneMu.RLock()
 	defer ssr.doneMu.RUnlock()
 	done := make([]*Span, len(ssr.done))

oteltest/doc.go

@@ -45,7 +45,7 @@ introspection of their state and history. Additionally, a SpanRecorder can be
 provided to the TracerProvider to record all Spans started and ended by the
 testing structures.
 
-	sr := new(oteltest.StandardSpanRecorder)
+	sr := new(oteltest.SpanRecorder)
 	tp := oteltest.NewTracerProvider(oteltest.WithSpanRecorder(sr))
 */
 package oteltest // import "go.opentelemetry.io/otel/oteltest"

oteltest/tracer_test.go

@@ -295,7 +295,7 @@ func testTracedSpan(t *testing.T, fn func(tracer trace.Tracer, name string) (tra
 
 		e := matchers.NewExpecter(t)
 
-		sr := new(oteltest.StandardSpanRecorder)
+		sr := new(oteltest.SpanRecorder)
 		subject := oteltest.NewTracerProvider(oteltest.WithSpanRecorder(sr)).Tracer(t.Name())
 		subject.Start(context.Background(), "span1")
 
@@ -315,7 +315,7 @@ func testTracedSpan(t *testing.T, fn func(tracer trace.Tracer, name string) (tra
 
 		e := matchers.NewExpecter(t)
 
-		sr := new(oteltest.StandardSpanRecorder)
+		sr := new(oteltest.SpanRecorder)
 		subject := oteltest.NewTracerProvider(oteltest.WithSpanRecorder(sr)).Tracer(t.Name())
 
 		numSpans := 2