Fix run and init server (#24)

* Fix run and init server

* add codecov config

* fix code cov config

.codecov.yml

@@ -0,0 +1,8 @@
+coverage:
+  status:
+    patch:
+      default:
+        target: 0%
+    project:
+      default:
+        target: 50%

pkg/grpc_proxy_server/server.go

@@ -44,6 +44,12 @@ func New(config *config.Config, grpcServer *grpc_server.Server, services []servi
 		return nil, err
 	}
 
+	// Create a client connection to the gRPC server
+	ps.grpcConn, err = ps.createGrpcProxyConnection()
+	if err != nil {
+		return nil, err
+	}
+
 	// Create mux router to route HTTP requests in server
 	mux := createGrpcProxyMuxServer()
 
@@ -95,13 +101,6 @@ func createGrpcProxyMuxServer() *runtime.ServeMux {
 
 // Function runs gRPC proxy server on the [port]
 func (ps *Server) Run() error {
-	var err error
-	// Create a client connection to the gRPC server
-	ps.grpcConn, err = ps.createGrpcProxyConnection()
-	if err != nil {
-		return err
-	}
-
 	go func() {
 		if err := ps.httpServer.ListenAndServe(); err != nil {
 			ps.log.WithError(err).Fatal("Couldn't serve gRPC-Gateway server")

pkg/grpc_proxy_server/server_test.go

@@ -25,6 +25,8 @@ func TestNew(t *testing.T) {
 	assert.NoError(t, err)
 	assert.NotNil(t, grpcs)
 
+	assert.NoError(t, grpcs.Run())
+
 	s, err := grpc_proxy_server.New(c.Config, grpcs, []service.IServiceServer{})
 	assert.NoError(t, err)
 	assert.NotNil(t, s)

server.go

@@ -56,20 +56,22 @@ func New(config *config.Config, externalServices []service.IServiceServer) (*Ser
 		return nil, fmt.Errorf("couldn't create gRPC server. " + err.Error())
 	}
 
-	s.grpcProxyServer, err = grpc_proxy_server.New(s.Config, s.grpcServer, s.services)
-	if err != nil {
-		return nil, fmt.Errorf("couldn't create gRPC proxy server. " + err.Error())
-	}
-
 	return s, nil
 }
 
 func (s *Server) Run() error {
+	var err error
+
 	// Run gRPC server before creating gRPC proxy to allow gRPC proxy dial connection with gRPC
 	if err := s.grpcServer.Run(); err != nil {
 		return fmt.Errorf("couldn't run gRPC server. " + err.Error())
 	}
 
+	// Init gRPC server proxy on run, because it can be inited only with working gRPC server
+	s.grpcProxyServer, err = grpc_proxy_server.New(s.Config, s.grpcServer, s.services)
+	if err != nil {
+		return fmt.Errorf("couldn't create gRPC proxy server. " + err.Error())
+	}
 	if err := s.grpcProxyServer.Run(); err != nil {
 		return fmt.Errorf("couldn't run gRPC proxy server. " + err.Error())
 	}