bring back nop builder and deprecate it

exporter/exportertest/nop_exporter.go

@@ -60,3 +60,14 @@ type nopExporter struct {
 	component.ShutdownFunc
 	consumertest.Consumer
 }
+
+// NewNopBuilder returns an exporter.Builder that constructs nop receivers.
+//
+// Deprecated: this builder is being internalized within the service module,
+// and will be removed soon.
+func NewNopBuilder() *exporter.Builder {
+	nopFactory := NewNopFactory()
+	return exporter.NewBuilder(
+		map[component.ID]component.Config{component.NewID(nopType): nopFactory.CreateDefaultConfig()},
+		map[component.Type]exporter.Factory{nopType: nopFactory})
+}

exporter/exportertest/nop_exporter_test.go

@@ -42,3 +42,31 @@ func TestNewNopFactory(t *testing.T) {
 	assert.NoError(t, logs.ConsumeLogs(context.Background(), plog.NewLogs()))
 	assert.NoError(t, logs.Shutdown(context.Background()))
 }
+
+func TestNewNopBuilder(t *testing.T) {
+	builder := NewNopBuilder()
+	require.NotNil(t, builder)
+
+	factory := NewNopFactory()
+	cfg := factory.CreateDefaultConfig()
+	set := NewNopSettings()
+	set.ID = component.NewID(nopType)
+
+	traces, err := factory.CreateTracesExporter(context.Background(), set, cfg)
+	require.NoError(t, err)
+	bTraces, err := builder.CreateTraces(context.Background(), set)
+	require.NoError(t, err)
+	assert.IsType(t, traces, bTraces)
+
+	metrics, err := factory.CreateMetricsExporter(context.Background(), set, cfg)
+	require.NoError(t, err)
+	bMetrics, err := builder.CreateMetrics(context.Background(), set)
+	require.NoError(t, err)
+	assert.IsType(t, metrics, bMetrics)
+
+	logs, err := factory.CreateLogsExporter(context.Background(), set, cfg)
+	require.NoError(t, err)
+	bLogs, err := builder.CreateLogs(context.Background(), set)
+	require.NoError(t, err)
+	assert.IsType(t, logs, bLogs)
+}