chore: add tests (#3921)

zrpc/internal/serverinterceptors/breakerinterceptor_test.go

@@ -5,6 +5,7 @@ import (
 	"testing"
 
 	"github.com/stretchr/testify/assert"
+	"github.com/zeromicro/go-zero/core/breaker"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
@@ -27,3 +28,12 @@ func TestUnaryBreakerInterceptor(t *testing.T) {
 	})
 	assert.NotNil(t, err)
 }
+
+func TestUnaryBreakerInterceptor_Unavailable(t *testing.T) {
+	_, err := UnaryBreakerInterceptor(context.Background(), nil, &grpc.UnaryServerInfo{
+		FullMethod: "any",
+	}, func(_ context.Context, _ any) (any, error) {
+		return nil, breaker.ErrServiceUnavailable
+	})
+	assert.NotNil(t, err)
+}