| // Copyright 2023 Google LLC |
| // |
| // 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 grpctransport |
| |
| import ( |
| "context" |
| "errors" |
| "net" |
| "testing" |
| |
| "google.golang.org/grpc" |
| "google.golang.org/grpc/credentials/insecure" |
| ) |
| |
| func TestPool_RoundRobin(t *testing.T) { |
| conn1 := &grpc.ClientConn{} |
| conn2 := &grpc.ClientConn{} |
| |
| pool := &roundRobinConnPool{ |
| conns: []*grpc.ClientConn{ |
| conn1, conn2, |
| }, |
| } |
| |
| if got := pool.Connection(); got != conn2 { |
| t.Errorf("pool.Conn() #1 = %v, want conn2 (%v)", got, conn2) |
| } |
| if got := pool.Connection(); got != conn1 { |
| t.Errorf("pool.Conn() #2 = %v, want conn1 (%v)", got, conn1) |
| } |
| if got := pool.Connection(); got != conn2 { |
| t.Errorf("pool.Conn() #3 = %v, want conn2 (%v)", got, conn2) |
| } |
| if got := pool.Len(); got != 2 { |
| t.Errorf("pool.Len() = %v, want %v", got, 2) |
| } |
| } |
| |
| func TestPool_SingleConn(t *testing.T) { |
| conn1 := &grpc.ClientConn{} |
| pool := &singleConnPool{conn1} |
| |
| if got := pool.Connection(); got != conn1 { |
| t.Errorf("pool.Conn() #1 = %v, want conn2 (%v)", got, conn1) |
| } |
| if got := pool.Connection(); got != conn1 { |
| t.Errorf("pool.Conn() #2 = %v, want conn1 (%v)", got, conn1) |
| } |
| if got := pool.Len(); got != 1 { |
| t.Errorf("pool.Len() = %v, want %v", got, 1) |
| } |
| } |
| |
| func TestClose(t *testing.T) { |
| _, l := mockServer(t) |
| |
| pool := &roundRobinConnPool{} |
| for i := 0; i < 4; i++ { |
| conn, err := grpc.Dial(l.Addr().String(), grpc.WithTransportCredentials(insecure.NewCredentials())) |
| if err != nil { |
| t.Fatal(err) |
| } |
| pool.conns = append(pool.conns, conn) |
| } |
| |
| if err := pool.Close(); err != nil { |
| t.Fatalf("pool.Close: %v", err) |
| } |
| } |
| |
| func TestWithEndpointAndPoolSize(t *testing.T) { |
| _, l := mockServer(t) |
| ctx := context.Background() |
| connPool, err := Dial(ctx, false, &Options{ |
| Endpoint: l.Addr().String(), |
| PoolSize: 4, |
| }) |
| if err != nil { |
| t.Fatal(err) |
| } |
| |
| if err := connPool.Close(); err != nil { |
| t.Fatalf("pool.Close: %v", err) |
| } |
| } |
| |
| func TestMultiError(t *testing.T) { |
| tests := []struct { |
| name string |
| errs multiError |
| want string |
| }{ |
| { |
| name: "0 errors", |
| want: "(0 errors)", |
| }, |
| { |
| name: "1 errors", |
| errs: []error{errors.New("the full error message")}, |
| want: "the full error message", |
| }, |
| { |
| name: "2 errors", |
| errs: []error{errors.New("foo"), errors.New("bar")}, |
| want: "foo (and 1 other error)", |
| }, |
| { |
| name: "3 errors", |
| errs: []error{errors.New("foo"), errors.New("bar"), errors.New("baz")}, |
| want: "foo (and 2 other errors)", |
| }, |
| } |
| for _, tt := range tests { |
| t.Run(tt.name, func(t *testing.T) { |
| got := tt.errs.Error() |
| if got != tt.want { |
| t.Fatalf("got %v, want %v", got, tt.want) |
| } |
| }) |
| } |
| } |
| |
| func mockServer(t *testing.T) (*grpc.Server, net.Listener) { |
| t.Helper() |
| |
| l, err := net.Listen("tcp", "localhost:0") |
| if err != nil { |
| t.Fatal(err) |
| } |
| |
| s := grpc.NewServer() |
| go s.Serve(l) |
| |
| return s, l |
| } |