| /* |
| * |
| * Copyright 2020 gRPC authors. |
| * |
| * 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 rls |
| |
| import ( |
| "errors" |
| "fmt" |
| "testing" |
| "time" |
| |
| "github.com/golang/protobuf/proto" |
| "github.com/google/go-cmp/cmp" |
| "google.golang.org/grpc" |
| rlspb "google.golang.org/grpc/balancer/rls/internal/proto/grpc_lookup_v1" |
| "google.golang.org/grpc/balancer/rls/internal/testutils/fakeserver" |
| "google.golang.org/grpc/codes" |
| "google.golang.org/grpc/status" |
| ) |
| |
| const ( |
| defaultDialTarget = "dummy" |
| defaultRPCTimeout = 5 * time.Second |
| defaultTestTimeout = 1 * time.Second |
| ) |
| |
| func setup(t *testing.T) (*fakeserver.Server, *grpc.ClientConn, func()) { |
| t.Helper() |
| |
| server, sCleanup, err := fakeserver.Start() |
| if err != nil { |
| t.Fatalf("Failed to start fake RLS server: %v", err) |
| } |
| |
| cc, cCleanup, err := server.ClientConn() |
| if err != nil { |
| t.Fatalf("Failed to get a ClientConn to the RLS server: %v", err) |
| } |
| |
| return server, cc, func() { |
| sCleanup() |
| cCleanup() |
| } |
| } |
| |
| // TestLookupFailure verifies the case where the RLS server returns an error. |
| func TestLookupFailure(t *testing.T) { |
| server, cc, cleanup := setup(t) |
| defer cleanup() |
| |
| // We setup the fake server to return an error. |
| server.ResponseChan <- fakeserver.Response{Err: errors.New("rls failure")} |
| |
| rlsClient := newRLSClient(cc, defaultDialTarget, defaultRPCTimeout) |
| |
| errCh := make(chan error) |
| rlsClient.lookup("", nil, func(target, headerData string, err error) { |
| if err == nil { |
| errCh <- errors.New("rlsClient.lookup() succeeded, should have failed") |
| return |
| } |
| if target != "" || headerData != "" { |
| errCh <- fmt.Errorf("rlsClient.lookup() = (%s, %s), should be empty strings", target, headerData) |
| return |
| } |
| errCh <- nil |
| }) |
| |
| timer := time.NewTimer(defaultTestTimeout) |
| select { |
| case <-timer.C: |
| t.Fatal("Timeout when expecting a routeLookup callback") |
| case err := <-errCh: |
| timer.Stop() |
| if err != nil { |
| t.Fatal(err) |
| } |
| } |
| } |
| |
| // TestLookupDeadlineExceeded tests the case where the RPC deadline associated |
| // with the lookup expires. |
| func TestLookupDeadlineExceeded(t *testing.T) { |
| _, cc, cleanup := setup(t) |
| defer cleanup() |
| |
| // Give the Lookup RPC a small deadline, but don't setup the fake server to |
| // return anything. So the Lookup call will block and eventuall expire. |
| rlsClient := newRLSClient(cc, defaultDialTarget, 100*time.Millisecond) |
| |
| errCh := make(chan error) |
| rlsClient.lookup("", nil, func(target, headerData string, err error) { |
| if st, ok := status.FromError(err); !ok || st.Code() != codes.DeadlineExceeded { |
| errCh <- fmt.Errorf("rlsClient.lookup() returned error: %v, want %v", err, codes.DeadlineExceeded) |
| return |
| } |
| errCh <- nil |
| }) |
| |
| timer := time.NewTimer(defaultTestTimeout) |
| select { |
| case <-timer.C: |
| t.Fatal("Timeout when expecting a routeLookup callback") |
| case err := <-errCh: |
| timer.Stop() |
| if err != nil { |
| t.Fatal(err) |
| } |
| } |
| } |
| |
| // TestLookupSuccess verifies the successful Lookup API case. |
| func TestLookupSuccess(t *testing.T) { |
| server, cc, cleanup := setup(t) |
| defer cleanup() |
| |
| const ( |
| rlsReqPath = "/service/method" |
| rlsRespTarget = "us_east_1.firestore.googleapis.com" |
| rlsHeaderData = "headerData" |
| ) |
| |
| rlsReqKeyMap := map[string]string{ |
| "k1": "v1", |
| "k2": "v2", |
| } |
| wantLookupRequest := &rlspb.RouteLookupRequest{ |
| Server: defaultDialTarget, |
| Path: rlsReqPath, |
| TargetType: "grpc", |
| KeyMap: rlsReqKeyMap, |
| } |
| |
| rlsClient := newRLSClient(cc, defaultDialTarget, defaultRPCTimeout) |
| |
| errCh := make(chan error) |
| rlsClient.lookup(rlsReqPath, rlsReqKeyMap, func(t, hd string, err error) { |
| if err != nil { |
| errCh <- fmt.Errorf("rlsClient.Lookup() failed: %v", err) |
| return |
| } |
| if t != rlsRespTarget || hd != rlsHeaderData { |
| errCh <- fmt.Errorf("rlsClient.lookup() = (%s, %s), want (%s, %s)", t, hd, rlsRespTarget, rlsHeaderData) |
| return |
| } |
| errCh <- nil |
| }) |
| |
| // Make sure that the fake server received the expected RouteLookupRequest |
| // proto. |
| timer := time.NewTimer(defaultTestTimeout) |
| select { |
| case gotLookupRequest := <-server.RequestChan: |
| if !timer.Stop() { |
| <-timer.C |
| } |
| if diff := cmp.Diff(wantLookupRequest, gotLookupRequest, cmp.Comparer(proto.Equal)); diff != "" { |
| t.Fatalf("RouteLookupRequest diff (-want, +got):\n%s", diff) |
| } |
| case <-timer.C: |
| t.Fatalf("Timed out wile waiting for a RouteLookupRequest") |
| } |
| |
| // We setup the fake server to return this response when it receives a |
| // request. |
| server.ResponseChan <- fakeserver.Response{ |
| Resp: &rlspb.RouteLookupResponse{ |
| Target: rlsRespTarget, |
| HeaderData: rlsHeaderData, |
| }, |
| } |
| |
| timer = time.NewTimer(defaultTestTimeout) |
| select { |
| case <-timer.C: |
| t.Fatal("Timeout when expecting a routeLookup callback") |
| case err := <-errCh: |
| timer.Stop() |
| if err != nil { |
| t.Fatal(err) |
| } |
| } |
| } |