| /* |
| * |
| * Copyright 2017 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 grpc |
| |
| import ( |
| "context" |
| "errors" |
| "fmt" |
| "net" |
| "strings" |
| "testing" |
| "time" |
| |
| "google.golang.org/grpc/codes" |
| "google.golang.org/grpc/resolver" |
| "google.golang.org/grpc/resolver/manual" |
| "google.golang.org/grpc/serviceconfig" |
| "google.golang.org/grpc/status" |
| ) |
| |
| func (s) TestParseTarget(t *testing.T) { |
| for _, test := range []resolver.Target{ |
| {Scheme: "dns", Authority: "", Endpoint: "google.com"}, |
| {Scheme: "dns", Authority: "a.server.com", Endpoint: "google.com"}, |
| {Scheme: "dns", Authority: "a.server.com", Endpoint: "google.com/?a=b"}, |
| {Scheme: "passthrough", Authority: "", Endpoint: "/unix/socket/address"}, |
| } { |
| str := test.Scheme + "://" + test.Authority + "/" + test.Endpoint |
| got := parseTarget(str) |
| if got != test { |
| t.Errorf("parseTarget(%q) = %+v, want %+v", str, got, test) |
| } |
| } |
| } |
| |
| func (s) TestParseTargetString(t *testing.T) { |
| for _, test := range []struct { |
| targetStr string |
| want resolver.Target |
| }{ |
| {targetStr: "", want: resolver.Target{Scheme: "", Authority: "", Endpoint: ""}}, |
| {targetStr: ":///", want: resolver.Target{Scheme: "", Authority: "", Endpoint: ""}}, |
| {targetStr: "a:///", want: resolver.Target{Scheme: "a", Authority: "", Endpoint: ""}}, |
| {targetStr: "://a/", want: resolver.Target{Scheme: "", Authority: "a", Endpoint: ""}}, |
| {targetStr: ":///a", want: resolver.Target{Scheme: "", Authority: "", Endpoint: "a"}}, |
| {targetStr: "a://b/", want: resolver.Target{Scheme: "a", Authority: "b", Endpoint: ""}}, |
| {targetStr: "a:///b", want: resolver.Target{Scheme: "a", Authority: "", Endpoint: "b"}}, |
| {targetStr: "://a/b", want: resolver.Target{Scheme: "", Authority: "a", Endpoint: "b"}}, |
| {targetStr: "a://b/c", want: resolver.Target{Scheme: "a", Authority: "b", Endpoint: "c"}}, |
| {targetStr: "dns:///google.com", want: resolver.Target{Scheme: "dns", Authority: "", Endpoint: "google.com"}}, |
| {targetStr: "dns://a.server.com/google.com", want: resolver.Target{Scheme: "dns", Authority: "a.server.com", Endpoint: "google.com"}}, |
| {targetStr: "dns://a.server.com/google.com/?a=b", want: resolver.Target{Scheme: "dns", Authority: "a.server.com", Endpoint: "google.com/?a=b"}}, |
| |
| {targetStr: "/", want: resolver.Target{Scheme: "", Authority: "", Endpoint: "/"}}, |
| {targetStr: "google.com", want: resolver.Target{Scheme: "", Authority: "", Endpoint: "google.com"}}, |
| {targetStr: "google.com/?a=b", want: resolver.Target{Scheme: "", Authority: "", Endpoint: "google.com/?a=b"}}, |
| {targetStr: "/unix/socket/address", want: resolver.Target{Scheme: "", Authority: "", Endpoint: "/unix/socket/address"}}, |
| |
| // If we can only parse part of the target. |
| {targetStr: "://", want: resolver.Target{Scheme: "", Authority: "", Endpoint: "://"}}, |
| {targetStr: "unix://domain", want: resolver.Target{Scheme: "", Authority: "", Endpoint: "unix://domain"}}, |
| {targetStr: "a:b", want: resolver.Target{Scheme: "", Authority: "", Endpoint: "a:b"}}, |
| {targetStr: "a/b", want: resolver.Target{Scheme: "", Authority: "", Endpoint: "a/b"}}, |
| {targetStr: "a:/b", want: resolver.Target{Scheme: "", Authority: "", Endpoint: "a:/b"}}, |
| {targetStr: "a//b", want: resolver.Target{Scheme: "", Authority: "", Endpoint: "a//b"}}, |
| {targetStr: "a://b", want: resolver.Target{Scheme: "", Authority: "", Endpoint: "a://b"}}, |
| } { |
| got := parseTarget(test.targetStr) |
| if got != test.want { |
| t.Errorf("parseTarget(%q) = %+v, want %+v", test.targetStr, got, test.want) |
| } |
| } |
| } |
| |
| // The target string with unknown scheme should be kept unchanged and passed to |
| // the dialer. |
| func (s) TestDialParseTargetUnknownScheme(t *testing.T) { |
| for _, test := range []struct { |
| targetStr string |
| want string |
| }{ |
| {"/unix/socket/address", "/unix/socket/address"}, |
| |
| // Special test for "unix:///". |
| {"unix:///unix/socket/address", "unix:///unix/socket/address"}, |
| |
| // For known scheme. |
| {"passthrough://a.server.com/google.com", "google.com"}, |
| } { |
| dialStrCh := make(chan string, 1) |
| cc, err := Dial(test.targetStr, WithInsecure(), WithDialer(func(addr string, _ time.Duration) (net.Conn, error) { |
| select { |
| case dialStrCh <- addr: |
| default: |
| } |
| return nil, fmt.Errorf("test dialer, always error") |
| })) |
| if err != nil { |
| t.Fatalf("Failed to create ClientConn: %v", err) |
| } |
| got := <-dialStrCh |
| cc.Close() |
| if got != test.want { |
| t.Errorf("Dial(%q), dialer got %q, want %q", test.targetStr, got, test.want) |
| } |
| } |
| } |
| |
| func testResolverErrorPolling(t *testing.T, badUpdate func(*manual.Resolver), goodUpdate func(*manual.Resolver), dopts ...DialOption) { |
| boIter := make(chan int) |
| resolverBackoff := func(v int) time.Duration { |
| boIter <- v |
| return 0 |
| } |
| |
| r, rcleanup := manual.GenerateAndRegisterManualResolver() |
| defer rcleanup() |
| rn := make(chan struct{}) |
| defer func() { close(rn) }() |
| r.ResolveNowCallback = func(resolver.ResolveNowOption) { rn <- struct{}{} } |
| |
| defaultDialOptions := []DialOption{ |
| WithInsecure(), |
| withResolveNowBackoff(resolverBackoff), |
| } |
| cc, err := Dial(r.Scheme()+":///test.server", append(defaultDialOptions, dopts...)...) |
| if err != nil { |
| t.Fatalf("Dial(_, _) = _, %v; want _, nil", err) |
| } |
| defer cc.Close() |
| badUpdate(r) |
| |
| panicAfter := time.AfterFunc(5*time.Second, func() { panic("timed out polling resolver") }) |
| defer panicAfter.Stop() |
| |
| // Ensure ResolveNow is called, then Backoff with the right parameter, several times |
| for i := 0; i < 7; i++ { |
| <-rn |
| if v := <-boIter; v != i { |
| t.Errorf("Backoff call %v uses value %v", i, v) |
| } |
| } |
| |
| // UpdateState will block if ResolveNow is being called (which blocks on |
| // rn), so call it in a goroutine. |
| goodUpdate(r) |
| |
| // Wait awhile to ensure ResolveNow and Backoff stop being called when the |
| // state is OK (i.e. polling was cancelled). |
| for { |
| t := time.NewTimer(50 * time.Millisecond) |
| select { |
| case <-rn: |
| // ClientConn is still calling ResolveNow |
| <-boIter |
| time.Sleep(5 * time.Millisecond) |
| continue |
| case <-t.C: |
| // ClientConn stopped calling ResolveNow; success |
| } |
| break |
| } |
| } |
| |
| // TestResolverErrorPolling injects resolver errors and verifies ResolveNow is |
| // called with the appropriate backoff strategy being consulted between |
| // ResolveNow calls. |
| func (s) TestResolverErrorPolling(t *testing.T) { |
| testResolverErrorPolling(t, func(r *manual.Resolver) { |
| r.CC.ReportError(errors.New("res err")) |
| }, func(r *manual.Resolver) { |
| // UpdateState will block if ResolveNow is being called (which blocks on |
| // rn), so call it in a goroutine. |
| go r.CC.UpdateState(resolver.State{}) |
| }) |
| } |
| |
| // TestServiceConfigErrorPolling injects a service config error and verifies |
| // ResolveNow is called with the appropriate backoff strategy being consulted |
| // between ResolveNow calls. |
| func (s) TestServiceConfigErrorPolling(t *testing.T) { |
| testResolverErrorPolling(t, func(r *manual.Resolver) { |
| badsc := r.CC.ParseServiceConfig("bad config") |
| r.UpdateState(resolver.State{ServiceConfig: badsc}) |
| }, func(r *manual.Resolver) { |
| // UpdateState will block if ResolveNow is being called (which blocks on |
| // rn), so call it in a goroutine. |
| go r.CC.UpdateState(resolver.State{}) |
| }) |
| } |
| |
| // TestResolverErrorInBuild makes the resolver.Builder call into the ClientConn |
| // during the Build call. We use two separate mutexes in the code which make |
| // sure there is no data race in this code path, and also that there is no |
| // deadlock. |
| func (s) TestResolverErrorInBuild(t *testing.T) { |
| r, rcleanup := manual.GenerateAndRegisterManualResolver() |
| defer rcleanup() |
| r.InitialState(resolver.State{ServiceConfig: &serviceconfig.ParseResult{Err: errors.New("resolver build err")}}) |
| |
| cc, err := Dial(r.Scheme()+":///test.server", WithInsecure()) |
| if err != nil { |
| t.Fatalf("Dial(_, _) = _, %v; want _, nil", err) |
| } |
| defer cc.Close() |
| |
| ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second) |
| defer cancel() |
| var dummy int |
| const wantMsg = "error parsing service config" |
| const wantCode = codes.Unavailable |
| if err := cc.Invoke(ctx, "/foo/bar", &dummy, &dummy); status.Code(err) != wantCode || !strings.Contains(status.Convert(err).Message(), wantMsg) { |
| t.Fatalf("cc.Invoke(_, _, _, _) = %v; want status.Code()==%v, status.Message() contains %q", err, wantCode, wantMsg) |
| } |
| } |
| |
| func (s) TestServiceConfigErrorRPC(t *testing.T) { |
| r, rcleanup := manual.GenerateAndRegisterManualResolver() |
| defer rcleanup() |
| |
| cc, err := Dial(r.Scheme()+":///test.server", WithInsecure()) |
| if err != nil { |
| t.Fatalf("Dial(_, _) = _, %v; want _, nil", err) |
| } |
| defer cc.Close() |
| badsc := r.CC.ParseServiceConfig("bad config") |
| r.UpdateState(resolver.State{ServiceConfig: badsc}) |
| |
| ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second) |
| defer cancel() |
| var dummy int |
| const wantMsg = "error parsing service config" |
| const wantCode = codes.Unavailable |
| if err := cc.Invoke(ctx, "/foo/bar", &dummy, &dummy); status.Code(err) != wantCode || !strings.Contains(status.Convert(err).Message(), wantMsg) { |
| t.Fatalf("cc.Invoke(_, _, _, _) = %v; want status.Code()==%v, status.Message() contains %q", err, wantCode, wantMsg) |
| } |
| } |