add runtime-service test with tracerProvider

Signed-off-by: Sally O'Malley <somalley@redhat.com>

vendor/go.opentelemetry.io/otel/sdk/trace/tracetest/test.go

@@ -0,0 +1,85 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package tracetest is a testing helper package for the SDK. User can
+// configure no-op or in-memory exporters to verify different SDK behaviors or
+// custom instrumentation.
+package tracetest // import "go.opentelemetry.io/otel/sdk/trace/tracetest"
+
+import (
+	"context"
+	"sync"
+
+	"go.opentelemetry.io/otel/sdk/trace"
+)
+
+var _ trace.SpanExporter = (*NoopExporter)(nil)
+
+// NewNoopExporter returns a new no-op exporter.
+func NewNoopExporter() *NoopExporter {
+	return new(NoopExporter)
+}
+
+// NoopExporter is an exporter that drops all received SpanSnapshots and
+// performs no action.
+type NoopExporter struct{}
+
+// ExportSpans handles export of SpanSnapshots by dropping them.
+func (nsb *NoopExporter) ExportSpans(context.Context, []*trace.SpanSnapshot) error { return nil }
+
+// Shutdown stops the exporter by doing nothing.
+func (nsb *NoopExporter) Shutdown(context.Context) error { return nil }
+
+var _ trace.SpanExporter = (*InMemoryExporter)(nil)
+
+// NewInMemoryExporter returns a new InMemoryExporter.
+func NewInMemoryExporter() *InMemoryExporter {
+	return new(InMemoryExporter)
+}
+
+// InMemoryExporter is an exporter that stores all received spans in-memory.
+type InMemoryExporter struct {
+	mu sync.Mutex
+	ss []*trace.SpanSnapshot
+}
+
+// ExportSpans handles export of SpanSnapshots by storing them in memory.
+func (imsb *InMemoryExporter) ExportSpans(_ context.Context, ss []*trace.SpanSnapshot) error {
+	imsb.mu.Lock()
+	defer imsb.mu.Unlock()
+	imsb.ss = append(imsb.ss, ss...)
+	return nil
+}
+
+// Shutdown stops the exporter by clearing SpanSnapshots held in memory.
+func (imsb *InMemoryExporter) Shutdown(context.Context) error {
+	imsb.Reset()
+	return nil
+}
+
+// Reset the current in-memory storage.
+func (imsb *InMemoryExporter) Reset() {
+	imsb.mu.Lock()
+	defer imsb.mu.Unlock()
+	imsb.ss = nil
+}
+
+// GetSpans returns the current in-memory stored spans.
+func (imsb *InMemoryExporter) GetSpans() []*trace.SpanSnapshot {
+	imsb.mu.Lock()
+	defer imsb.mu.Unlock()
+	ret := make([]*trace.SpanSnapshot, len(imsb.ss))
+	copy(ret, imsb.ss)
+	return ret
+}