Add new tracer provider unit tests

tracerProvider.go

@@ -78,13 +78,16 @@ type ProviderConstructor func(config Config) (trace.TracerProvider, error)
 var providersConfig = map[string]ProviderConstructor{
 	"otlp/grpc": func(cfg Config) (trace.TracerProvider, error) {
 		// Send traces over gRPC
+		if cfg.Endpoint == "" {
+			return nil, ErrTracerProviderBuildFailed
+		}
 		exporter, err := otlptracegrpc.New(context.Background(),
 
 			otlptracegrpc.WithEndpoint(cfg.Endpoint),
 			otlptracegrpc.WithInsecure(),
 		)
 		if err != nil {
-			return nil, err
+			return nil, fmt.Errorf("%w: %v", ErrTracerProviderBuildFailed, err)
 		}
 
 		return sdktrace.NewTracerProvider(
@@ -100,13 +103,16 @@ var providersConfig = map[string]ProviderConstructor{
 	},
 	"otlp/http": func(cfg Config) (trace.TracerProvider, error) {
 		// Send traces over HTTP
+		if cfg.Endpoint == "" {
+			return nil, ErrTracerProviderBuildFailed
+		}
 		exporter, err := otlptracehttp.New(context.Background(),
 
 			otlptracehttp.WithEndpoint(cfg.Endpoint),
 			otlptracehttp.WithInsecure(),
 		)
 		if err != nil {
-			return nil, err
+			return nil, fmt.Errorf("%w: %v", ErrTracerProviderBuildFailed, err)
 		}
 
 		return sdktrace.NewTracerProvider(

tracerProvider_test.go

@@ -30,6 +30,34 @@ func TestConfigureTracerProvider(t *testing.T) {
 		Config      Config
 		Err         error
 	}{
+		{
+			Description: "Otlp/gRPC: Valid",
+			Config: Config{
+				Provider: "otlp/grpc",
+				Endpoint: "http://localhost",
+			},
+		},
+		{
+			Description: "Otlp/gRPC: Missing Endpoint",
+			Config: Config{
+				Provider: "otlp/grpc",
+			},
+			Err: ErrTracerProviderBuildFailed,
+		},
+		{
+			Description: "Otlp/HTTP: Valid",
+			Config: Config{
+				Provider: "otlp/http",
+				Endpoint: "http://localhost",
+			},
+		},
+		{
+			Description: "Otlp/HTTP: Missing Endpoint",
+			Config: Config{
+				Provider: "otlp/http",
+			},
+			Err: ErrTracerProviderBuildFailed,
+		},
 		{
 			Description: "Jaeger: Missing endpoint",
 			Config: Config{