mirror of https://github.com/grpc/grpc-go.git
296 lines
9.8 KiB
Go
296 lines
9.8 KiB
Go
/*
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*
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* Copyright 2021 gRPC authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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package grpc
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import (
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"context"
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"errors"
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"fmt"
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"net"
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"testing"
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"time"
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"github.com/google/go-cmp/cmp"
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"google.golang.org/grpc/credentials/insecure"
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"google.golang.org/grpc/internal"
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"google.golang.org/grpc/internal/testutils"
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"google.golang.org/grpc/resolver"
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)
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func generateTarget(target string) resolver.Target {
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return resolver.Target{URL: *testutils.MustParseURL(target)}
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}
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// Resets the default scheme as though it was never set by the user.
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func resetInitialResolverState() {
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resolver.SetDefaultScheme("passthrough")
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internal.UserSetDefaultScheme = false
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}
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type testResolverForParser struct {
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resolver.Resolver
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}
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func (testResolverForParser) Build(resolver.Target, resolver.ClientConn, resolver.BuildOptions) (resolver.Resolver, error) {
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return testResolverForParser{}, nil
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}
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func (testResolverForParser) Close() {}
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func (testResolverForParser) Scheme() string {
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return "testresolverforparser"
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}
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func init() { resolver.Register(testResolverForParser{}) }
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func (s) TestParsedTarget_Success_WithoutCustomDialer(t *testing.T) {
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tests := []struct {
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target string
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wantDialParse resolver.Target
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wantNewClientParse resolver.Target
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wantCustomParse resolver.Target
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}{
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// No scheme is specified.
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{
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target: "://a/b",
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wantDialParse: generateTarget("passthrough:///://a/b"),
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wantNewClientParse: generateTarget("dns:///://a/b"),
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wantCustomParse: generateTarget("testresolverforparser:///://a/b"),
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},
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{
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target: "a//b",
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wantDialParse: generateTarget("passthrough:///a//b"),
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wantNewClientParse: generateTarget("dns:///a//b"),
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wantCustomParse: generateTarget("testresolverforparser:///a//b"),
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},
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// An unregistered scheme is specified.
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{
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target: "a:///",
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wantDialParse: generateTarget("passthrough:///a:///"),
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wantNewClientParse: generateTarget("dns:///a:///"),
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wantCustomParse: generateTarget("testresolverforparser:///a:///"),
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},
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{
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target: "a:b",
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wantDialParse: generateTarget("passthrough:///a:b"),
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wantNewClientParse: generateTarget("dns:///a:b"),
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wantCustomParse: generateTarget("testresolverforparser:///a:b"),
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},
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// A registered scheme is specified.
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{
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target: "dns://a.server.com/google.com",
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wantDialParse: generateTarget("dns://a.server.com/google.com"),
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wantNewClientParse: generateTarget("dns://a.server.com/google.com"),
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wantCustomParse: generateTarget("dns://a.server.com/google.com"),
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},
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{
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target: "unix-abstract:/ a///://::!@#$%25^&*()b",
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wantDialParse: generateTarget("unix-abstract:/ a///://::!@#$%25^&*()b"),
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wantNewClientParse: generateTarget("unix-abstract:/ a///://::!@#$%25^&*()b"),
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wantCustomParse: generateTarget("unix-abstract:/ a///://::!@#$%25^&*()b"),
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},
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{
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target: "unix-abstract:passthrough:abc",
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wantDialParse: generateTarget("unix-abstract:passthrough:abc"),
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wantNewClientParse: generateTarget("unix-abstract:passthrough:abc"),
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wantCustomParse: generateTarget("unix-abstract:passthrough:abc"),
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},
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{
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target: "passthrough:///unix:///a/b/c",
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wantDialParse: generateTarget("passthrough:///unix:///a/b/c"),
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wantNewClientParse: generateTarget("passthrough:///unix:///a/b/c"),
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wantCustomParse: generateTarget("passthrough:///unix:///a/b/c"),
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},
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// Cases for `scheme:absolute-path`.
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{
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target: "dns:/a/b/c",
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wantDialParse: generateTarget("dns:/a/b/c"),
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wantNewClientParse: generateTarget("dns:/a/b/c"),
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wantCustomParse: generateTarget("dns:/a/b/c"),
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},
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{
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target: "unregistered:/a/b/c",
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wantDialParse: generateTarget("passthrough:///unregistered:/a/b/c"),
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wantNewClientParse: generateTarget("dns:///unregistered:/a/b/c"),
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wantCustomParse: generateTarget("testresolverforparser:///unregistered:/a/b/c"),
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},
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}
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for _, test := range tests {
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t.Run(test.target, func(t *testing.T) {
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resetInitialResolverState()
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cc, err := Dial(test.target, WithTransportCredentials(insecure.NewCredentials()))
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if err != nil {
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t.Fatalf("Dial(%q) failed: %v", test.target, err)
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}
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cc.Close()
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if !cmp.Equal(cc.parsedTarget, test.wantDialParse) {
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t.Errorf("cc.parsedTarget for dial target %q = %+v, want %+v", test.target, cc.parsedTarget, test.wantDialParse)
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}
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cc, err = NewClient(test.target, WithTransportCredentials(insecure.NewCredentials()))
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if err != nil {
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t.Fatalf("NewClient(%q) failed: %v", test.target, err)
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}
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cc.Close()
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if !cmp.Equal(cc.parsedTarget, test.wantNewClientParse) {
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t.Errorf("cc.parsedTarget for newClient target %q = %+v, want %+v", test.target, cc.parsedTarget, test.wantNewClientParse)
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}
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resolver.SetDefaultScheme("testresolverforparser")
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cc, err = Dial(test.target, WithTransportCredentials(insecure.NewCredentials()))
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if err != nil {
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t.Fatalf("Dial(%q) failed: %v", test.target, err)
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}
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cc.Close()
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if !cmp.Equal(cc.parsedTarget, test.wantCustomParse) {
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t.Errorf("cc.parsedTarget for dial target %q = %+v, want %+v", test.target, cc.parsedTarget, test.wantDialParse)
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}
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cc, err = NewClient(test.target, WithTransportCredentials(insecure.NewCredentials()))
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if err != nil {
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t.Fatalf("NewClient(%q) failed: %v", test.target, err)
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}
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cc.Close()
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if !cmp.Equal(cc.parsedTarget, test.wantCustomParse) {
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t.Errorf("cc.parsedTarget for newClient target %q = %+v, want %+v", test.target, cc.parsedTarget, test.wantNewClientParse)
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}
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})
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}
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resetInitialResolverState()
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}
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func (s) TestParsedTarget_Failure_WithoutCustomDialer(t *testing.T) {
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targets := []string{
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"",
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"unix://a/b/c",
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"unix://authority",
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"unix-abstract://authority/a/b/c",
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"unix-abstract://authority",
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}
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for _, target := range targets {
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t.Run(target, func(t *testing.T) {
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if cc, err := Dial(target, WithTransportCredentials(insecure.NewCredentials())); err == nil {
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defer cc.Close()
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t.Fatalf("Dial(%q) succeeded cc.parsedTarget = %+v, expected to fail", target, cc.parsedTarget)
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}
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})
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}
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}
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func (s) TestParsedTarget_WithCustomDialer(t *testing.T) {
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resetInitialResolverState()
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defScheme := resolver.GetDefaultScheme()
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tests := []struct {
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target string
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wantParsed resolver.Target
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wantDialerAddress string
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}{
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// unix:[local_path], unix:[/absolute], and unix://[/absolute] have
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// different behaviors with a custom dialer.
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{
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target: "unix:a/b/c",
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wantParsed: resolver.Target{URL: *testutils.MustParseURL("unix:a/b/c")},
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wantDialerAddress: "unix:a/b/c",
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},
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{
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target: "unix:/a/b/c",
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wantParsed: resolver.Target{URL: *testutils.MustParseURL("unix:/a/b/c")},
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wantDialerAddress: "unix:///a/b/c",
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},
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{
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target: "unix:///a/b/c",
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wantParsed: resolver.Target{URL: *testutils.MustParseURL("unix:///a/b/c")},
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wantDialerAddress: "unix:///a/b/c",
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},
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{
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target: "dns:///127.0.0.1:50051",
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wantParsed: resolver.Target{URL: *testutils.MustParseURL("dns:///127.0.0.1:50051")},
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wantDialerAddress: "127.0.0.1:50051",
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},
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{
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target: ":///127.0.0.1:50051",
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wantParsed: resolver.Target{URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, ":///127.0.0.1:50051"))},
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wantDialerAddress: ":///127.0.0.1:50051",
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},
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{
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target: "dns://authority/127.0.0.1:50051",
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wantParsed: resolver.Target{URL: *testutils.MustParseURL("dns://authority/127.0.0.1:50051")},
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wantDialerAddress: "127.0.0.1:50051",
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},
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{
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target: "://authority/127.0.0.1:50051",
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wantParsed: resolver.Target{URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, "://authority/127.0.0.1:50051"))},
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wantDialerAddress: "://authority/127.0.0.1:50051",
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},
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{
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target: "/unix/socket/address",
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wantParsed: resolver.Target{URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, "/unix/socket/address"))},
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wantDialerAddress: "/unix/socket/address",
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},
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{
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target: "",
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wantParsed: resolver.Target{URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, ""))},
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wantDialerAddress: "",
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},
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{
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target: "passthrough://a.server.com/google.com",
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wantParsed: resolver.Target{URL: *testutils.MustParseURL("passthrough://a.server.com/google.com")},
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wantDialerAddress: "google.com",
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},
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}
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for _, test := range tests {
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t.Run(test.target, func(t *testing.T) {
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addrCh := make(chan string, 1)
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dialer := func(ctx context.Context, address string) (net.Conn, error) {
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addrCh <- address
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return nil, errors.New("dialer error")
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}
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cc, err := Dial(test.target, WithTransportCredentials(insecure.NewCredentials()), WithContextDialer(dialer))
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if err != nil {
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t.Fatalf("Dial(%q) failed: %v", test.target, err)
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}
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defer cc.Close()
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select {
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case addr := <-addrCh:
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if addr != test.wantDialerAddress {
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t.Fatalf("address in custom dialer is %q, want %q", addr, test.wantDialerAddress)
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}
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case <-time.After(time.Second):
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t.Fatal("timeout when waiting for custom dialer to be invoked")
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}
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if !cmp.Equal(cc.parsedTarget, test.wantParsed) {
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t.Errorf("cc.parsedTarget for dial target %q = %+v, want %+v", test.target, cc.parsedTarget, test.wantParsed)
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}
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})
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}
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}
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