| /* |
| * |
| * Copyright 2021 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" |
| "testing" |
| "time" |
| |
| "github.com/google/go-cmp/cmp" |
| "google.golang.org/grpc/credentials/insecure" |
| "google.golang.org/grpc/internal" |
| "google.golang.org/grpc/internal/testutils" |
| "google.golang.org/grpc/resolver" |
| ) |
| |
| func generateTarget(target string) resolver.Target { |
| return resolver.Target{URL: *testutils.MustParseURL(target)} |
| } |
| |
| // Resets the default scheme as though it was never set by the user. |
| func resetInitialResolverState() { |
| resolver.SetDefaultScheme("passthrough") |
| internal.UserSetDefaultScheme = false |
| } |
| |
| type testResolverForParser struct { |
| resolver.Resolver |
| } |
| |
| func (testResolverForParser) Build(resolver.Target, resolver.ClientConn, resolver.BuildOptions) (resolver.Resolver, error) { |
| return testResolverForParser{}, nil |
| } |
| |
| func (testResolverForParser) Close() {} |
| |
| func (testResolverForParser) Scheme() string { |
| return "testresolverforparser" |
| } |
| |
| func init() { resolver.Register(testResolverForParser{}) } |
| |
| func (s) TestParsedTarget_Success_WithoutCustomDialer(t *testing.T) { |
| tests := []struct { |
| target string |
| wantDialParse resolver.Target |
| wantNewClientParse resolver.Target |
| wantCustomParse resolver.Target |
| }{ |
| // No scheme is specified. |
| { |
| target: "://a/b", |
| wantDialParse: generateTarget("passthrough:///://a/b"), |
| wantNewClientParse: generateTarget("dns:///://a/b"), |
| wantCustomParse: generateTarget("testresolverforparser:///://a/b"), |
| }, |
| { |
| target: "a//b", |
| wantDialParse: generateTarget("passthrough:///a//b"), |
| wantNewClientParse: generateTarget("dns:///a//b"), |
| wantCustomParse: generateTarget("testresolverforparser:///a//b"), |
| }, |
| |
| // An unregistered scheme is specified. |
| { |
| target: "a:///", |
| wantDialParse: generateTarget("passthrough:///a:///"), |
| wantNewClientParse: generateTarget("dns:///a:///"), |
| wantCustomParse: generateTarget("testresolverforparser:///a:///"), |
| }, |
| { |
| target: "a:b", |
| wantDialParse: generateTarget("passthrough:///a:b"), |
| wantNewClientParse: generateTarget("dns:///a:b"), |
| wantCustomParse: generateTarget("testresolverforparser:///a:b"), |
| }, |
| |
| // A registered scheme is specified. |
| { |
| target: "dns://a.server.com/google.com", |
| wantDialParse: generateTarget("dns://a.server.com/google.com"), |
| wantNewClientParse: generateTarget("dns://a.server.com/google.com"), |
| wantCustomParse: generateTarget("dns://a.server.com/google.com"), |
| }, |
| { |
| target: "unix-abstract:/ a///://::!@#$%25^&*()b", |
| wantDialParse: generateTarget("unix-abstract:/ a///://::!@#$%25^&*()b"), |
| wantNewClientParse: generateTarget("unix-abstract:/ a///://::!@#$%25^&*()b"), |
| wantCustomParse: generateTarget("unix-abstract:/ a///://::!@#$%25^&*()b"), |
| }, |
| { |
| target: "unix-abstract:passthrough:abc", |
| wantDialParse: generateTarget("unix-abstract:passthrough:abc"), |
| wantNewClientParse: generateTarget("unix-abstract:passthrough:abc"), |
| wantCustomParse: generateTarget("unix-abstract:passthrough:abc"), |
| }, |
| { |
| target: "passthrough:///unix:///a/b/c", |
| wantDialParse: generateTarget("passthrough:///unix:///a/b/c"), |
| wantNewClientParse: generateTarget("passthrough:///unix:///a/b/c"), |
| wantCustomParse: generateTarget("passthrough:///unix:///a/b/c"), |
| }, |
| |
| // Cases for `scheme:absolute-path`. |
| { |
| target: "dns:/a/b/c", |
| wantDialParse: generateTarget("dns:/a/b/c"), |
| wantNewClientParse: generateTarget("dns:/a/b/c"), |
| wantCustomParse: generateTarget("dns:/a/b/c"), |
| }, |
| { |
| target: "unregistered:/a/b/c", |
| wantDialParse: generateTarget("passthrough:///unregistered:/a/b/c"), |
| wantNewClientParse: generateTarget("dns:///unregistered:/a/b/c"), |
| wantCustomParse: generateTarget("testresolverforparser:///unregistered:/a/b/c"), |
| }, |
| } |
| |
| for _, test := range tests { |
| t.Run(test.target, func(t *testing.T) { |
| resetInitialResolverState() |
| cc, err := Dial(test.target, WithTransportCredentials(insecure.NewCredentials())) |
| if err != nil { |
| t.Fatalf("Dial(%q) failed: %v", test.target, err) |
| } |
| cc.Close() |
| |
| if !cmp.Equal(cc.parsedTarget, test.wantDialParse) { |
| t.Errorf("cc.parsedTarget for dial target %q = %+v, want %+v", test.target, cc.parsedTarget, test.wantDialParse) |
| } |
| |
| cc, err = NewClient(test.target, WithTransportCredentials(insecure.NewCredentials())) |
| if err != nil { |
| t.Fatalf("NewClient(%q) failed: %v", test.target, err) |
| } |
| cc.Close() |
| |
| if !cmp.Equal(cc.parsedTarget, test.wantNewClientParse) { |
| t.Errorf("cc.parsedTarget for newClient target %q = %+v, want %+v", test.target, cc.parsedTarget, test.wantNewClientParse) |
| } |
| |
| resolver.SetDefaultScheme("testresolverforparser") |
| cc, err = Dial(test.target, WithTransportCredentials(insecure.NewCredentials())) |
| if err != nil { |
| t.Fatalf("Dial(%q) failed: %v", test.target, err) |
| } |
| cc.Close() |
| |
| if !cmp.Equal(cc.parsedTarget, test.wantCustomParse) { |
| t.Errorf("cc.parsedTarget for dial target %q = %+v, want %+v", test.target, cc.parsedTarget, test.wantDialParse) |
| } |
| |
| cc, err = NewClient(test.target, WithTransportCredentials(insecure.NewCredentials())) |
| if err != nil { |
| t.Fatalf("NewClient(%q) failed: %v", test.target, err) |
| } |
| cc.Close() |
| |
| if !cmp.Equal(cc.parsedTarget, test.wantCustomParse) { |
| t.Errorf("cc.parsedTarget for newClient target %q = %+v, want %+v", test.target, cc.parsedTarget, test.wantNewClientParse) |
| } |
| |
| }) |
| } |
| resetInitialResolverState() |
| } |
| |
| func (s) TestParsedTarget_Failure_WithoutCustomDialer(t *testing.T) { |
| targets := []string{ |
| "", |
| "unix://a/b/c", |
| "unix://authority", |
| "unix-abstract://authority/a/b/c", |
| "unix-abstract://authority", |
| } |
| |
| for _, target := range targets { |
| t.Run(target, func(t *testing.T) { |
| if cc, err := Dial(target, WithTransportCredentials(insecure.NewCredentials())); err == nil { |
| defer cc.Close() |
| t.Fatalf("Dial(%q) succeeded cc.parsedTarget = %+v, expected to fail", target, cc.parsedTarget) |
| } |
| }) |
| } |
| } |
| |
| func (s) TestParsedTarget_WithCustomDialer(t *testing.T) { |
| resetInitialResolverState() |
| defScheme := resolver.GetDefaultScheme() |
| tests := []struct { |
| target string |
| wantParsed resolver.Target |
| wantDialerAddress string |
| }{ |
| // unix:[local_path], unix:[/absolute], and unix://[/absolute] have |
| // different behaviors with a custom dialer. |
| { |
| target: "unix:a/b/c", |
| wantParsed: resolver.Target{URL: *testutils.MustParseURL("unix:a/b/c")}, |
| wantDialerAddress: "unix:a/b/c", |
| }, |
| { |
| target: "unix:/a/b/c", |
| wantParsed: resolver.Target{URL: *testutils.MustParseURL("unix:/a/b/c")}, |
| wantDialerAddress: "unix:///a/b/c", |
| }, |
| { |
| target: "unix:///a/b/c", |
| wantParsed: resolver.Target{URL: *testutils.MustParseURL("unix:///a/b/c")}, |
| wantDialerAddress: "unix:///a/b/c", |
| }, |
| { |
| target: "dns:///127.0.0.1:50051", |
| wantParsed: resolver.Target{URL: *testutils.MustParseURL("dns:///127.0.0.1:50051")}, |
| wantDialerAddress: "127.0.0.1:50051", |
| }, |
| { |
| target: ":///127.0.0.1:50051", |
| wantParsed: resolver.Target{URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, ":///127.0.0.1:50051"))}, |
| wantDialerAddress: ":///127.0.0.1:50051", |
| }, |
| { |
| target: "dns://authority/127.0.0.1:50051", |
| wantParsed: resolver.Target{URL: *testutils.MustParseURL("dns://authority/127.0.0.1:50051")}, |
| wantDialerAddress: "127.0.0.1:50051", |
| }, |
| { |
| target: "://authority/127.0.0.1:50051", |
| wantParsed: resolver.Target{URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, "://authority/127.0.0.1:50051"))}, |
| wantDialerAddress: "://authority/127.0.0.1:50051", |
| }, |
| { |
| target: "/unix/socket/address", |
| wantParsed: resolver.Target{URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, "/unix/socket/address"))}, |
| wantDialerAddress: "/unix/socket/address", |
| }, |
| { |
| target: "", |
| wantParsed: resolver.Target{URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, ""))}, |
| wantDialerAddress: "", |
| }, |
| { |
| target: "passthrough://a.server.com/google.com", |
| wantParsed: resolver.Target{URL: *testutils.MustParseURL("passthrough://a.server.com/google.com")}, |
| wantDialerAddress: "google.com", |
| }, |
| } |
| |
| for _, test := range tests { |
| t.Run(test.target, func(t *testing.T) { |
| addrCh := make(chan string, 1) |
| dialer := func(ctx context.Context, address string) (net.Conn, error) { |
| addrCh <- address |
| return nil, errors.New("dialer error") |
| } |
| |
| cc, err := Dial(test.target, WithTransportCredentials(insecure.NewCredentials()), WithContextDialer(dialer)) |
| if err != nil { |
| t.Fatalf("Dial(%q) failed: %v", test.target, err) |
| } |
| defer cc.Close() |
| |
| select { |
| case addr := <-addrCh: |
| if addr != test.wantDialerAddress { |
| t.Fatalf("address in custom dialer is %q, want %q", addr, test.wantDialerAddress) |
| } |
| case <-time.After(time.Second): |
| t.Fatal("timeout when waiting for custom dialer to be invoked") |
| } |
| if !cmp.Equal(cc.parsedTarget, test.wantParsed) { |
| t.Errorf("cc.parsedTarget for dial target %q = %+v, want %+v", test.target, cc.parsedTarget, test.wantParsed) |
| } |
| }) |
| } |
| } |
