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exporter_test.go
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exporter_test.go
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// 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 autoexport
import (
"context"
"reflect"
"testing"
"github.com/stretchr/testify/assert"
"go.opentelemetry.io/otel/exporters/otlp/otlptrace"
"go.opentelemetry.io/otel/sdk/trace"
)
func TestOTLPExporterReturnedWhenNoEnvOrFallbackExporterConfigured(t *testing.T) {
exporter, err := NewSpanExporter(context.Background())
assert.NoError(t, err)
assertOTLPHTTPExporter(t, exporter)
}
func TestFallbackExporterReturnedWhenNoEnvExporterConfigured(t *testing.T) {
testExporter := &testExporter{}
exporter, err := NewSpanExporter(
context.Background(),
WithFallbackSpanExporter(testExporter),
)
assert.NoError(t, err)
assert.Equal(t, testExporter, exporter)
assert.False(t, IsNoneSpanExporter(exporter))
}
func TestEnvExporterIsPreferredOverFallbackExporter(t *testing.T) {
t.Setenv("OTEL_TRACES_EXPORTER", "otlp")
testExporter := &testExporter{}
exporter, err := NewSpanExporter(
context.Background(),
WithFallbackSpanExporter(testExporter),
)
assert.NoError(t, err)
assertOTLPHTTPExporter(t, exporter)
}
func TestEnvExporterOTLPOverHTTP(t *testing.T) {
t.Setenv("OTEL_TRACES_EXPORTER", "otlp")
t.Setenv("OTEL_EXPORTER_OTLP_PROTOCOL", "http/protobuf")
exporter, err := NewSpanExporter(context.Background())
assert.NoError(t, err)
assertOTLPHTTPExporter(t, exporter)
}
func TestEnvExporterOTLPOverGRPC(t *testing.T) {
t.Setenv("OTEL_TRACES_EXPORTER", "otlp")
t.Setenv("OTEL_EXPORTER_OTLP_PROTOCOL", "grpc")
exporter, err := NewSpanExporter(context.Background())
assert.NoError(t, err)
assertOTLPGRPCExporter(t, exporter)
}
func TestEnvExporterOTLPOverGRPCOnlyProtocol(t *testing.T) {
t.Setenv("OTEL_EXPORTER_OTLP_PROTOCOL", "grpc")
exporter, err := NewSpanExporter(context.Background())
assert.NoError(t, err)
assertOTLPGRPCExporter(t, exporter)
}
func TestEnvExporterOTLPInvalidProtocol(t *testing.T) {
t.Setenv("OTEL_TRACES_EXPORTER", "otlp")
t.Setenv("OTEL_EXPORTER_OTLP_PROTOCOL", "invalid")
exporter, err := NewSpanExporter(context.Background())
assert.Error(t, err)
assert.Nil(t, exporter)
}
func TestEnvExporterNone(t *testing.T) {
t.Setenv("OTEL_TRACES_EXPORTER", "none")
exporter, err := NewSpanExporter(context.Background())
assert.NoError(t, err)
assert.True(t, IsNoneSpanExporter(exporter))
}
func assertOTLPHTTPExporter(t *testing.T, got trace.SpanExporter) {
t.Helper()
if !assert.IsType(t, &otlptrace.Exporter{}, got) {
return
}
// Implementation detail hack. This may break when bumping OTLP exporter modules as it uses unexported API.
clientType := reflect.Indirect(reflect.ValueOf(got)).FieldByName("client").Elem().Type().String()
assert.Equal(t, "*otlptracehttp.client", clientType)
assert.False(t, IsNoneSpanExporter(got))
}
func assertOTLPGRPCExporter(t *testing.T, got trace.SpanExporter) {
t.Helper()
if !assert.IsType(t, &otlptrace.Exporter{}, got) {
return
}
// Implementation detail hack. This may break when bumping OTLP exporter modules as it uses unexported API.
clientType := reflect.Indirect(reflect.ValueOf(got)).FieldByName("client").Elem().Type().String()
assert.Equal(t, "*otlptracegrpc.client", clientType)
assert.False(t, IsNoneSpanExporter(got))
}
type testExporter struct{}
func (e *testExporter) ExportSpans(ctx context.Context, ss []trace.ReadOnlySpan) error {
return nil
}
func (e *testExporter) Shutdown(ctx context.Context) error {
return nil
}