mirror of https://github.com/grpc/grpc-go.git
123 lines
3.7 KiB
Go
123 lines
3.7 KiB
Go
/*
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*
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* Copyright 2020 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 base
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import (
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"context"
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"testing"
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"time"
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"google.golang.org/grpc/attributes"
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"google.golang.org/grpc/balancer"
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"google.golang.org/grpc/connectivity"
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"google.golang.org/grpc/resolver"
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)
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type testClientConn struct {
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balancer.ClientConn
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newSubConn func([]resolver.Address, balancer.NewSubConnOptions) (balancer.SubConn, error)
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}
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func (c *testClientConn) NewSubConn(addrs []resolver.Address, opts balancer.NewSubConnOptions) (balancer.SubConn, error) {
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return c.newSubConn(addrs, opts)
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}
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func (c *testClientConn) UpdateState(balancer.State) {}
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type testSubConn struct {
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balancer.SubConn
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updateState func(balancer.SubConnState)
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}
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func (sc *testSubConn) UpdateAddresses([]resolver.Address) {}
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func (sc *testSubConn) Connect() {}
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func (sc *testSubConn) Shutdown() {}
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func (sc *testSubConn) GetOrBuildProducer(balancer.ProducerBuilder) (balancer.Producer, func()) {
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return nil, nil
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}
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// RegisterHealthListener is a no-op.
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func (*testSubConn) RegisterHealthListener(func(balancer.SubConnState)) {}
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// testPickBuilder creates balancer.Picker for test.
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type testPickBuilder struct {
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validate func(info PickerBuildInfo)
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}
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func (p *testPickBuilder) Build(info PickerBuildInfo) balancer.Picker {
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p.validate(info)
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return nil
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}
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func TestBaseBalancerReserveAttributes(t *testing.T) {
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ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
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defer cancel()
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validated := make(chan struct{}, 1)
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v := func(info PickerBuildInfo) {
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defer func() { validated <- struct{}{} }()
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for _, sc := range info.ReadySCs {
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if sc.Address.Addr == "1.1.1.1" {
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if sc.Address.Attributes == nil {
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t.Errorf("in picker.validate, got address %+v with nil attributes, want not nil", sc.Address)
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}
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foo, ok := sc.Address.Attributes.Value("foo").(string)
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if !ok || foo != "2233niang" {
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t.Errorf("in picker.validate, got address[1.1.1.1] with invalid attributes value %v, want 2233niang", sc.Address.Attributes.Value("foo"))
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}
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} else if sc.Address.Addr == "2.2.2.2" {
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if sc.Address.Attributes != nil {
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t.Error("in b.subConns, got address[2.2.2.2] with not nil attributes, want nil")
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}
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}
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}
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}
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pickBuilder := &testPickBuilder{validate: v}
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b := (&baseBuilder{pickerBuilder: pickBuilder}).Build(&testClientConn{
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newSubConn: func(_ []resolver.Address, opts balancer.NewSubConnOptions) (balancer.SubConn, error) {
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return &testSubConn{updateState: opts.StateListener}, nil
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},
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}, balancer.BuildOptions{}).(*baseBalancer)
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b.UpdateClientConnState(balancer.ClientConnState{
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ResolverState: resolver.State{
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Addresses: []resolver.Address{
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{Addr: "1.1.1.1", Attributes: attributes.New("foo", "2233niang")},
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{Addr: "2.2.2.2", Attributes: nil},
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},
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},
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})
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select {
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case <-validated:
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case <-ctx.Done():
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t.Fatalf("timed out waiting for UpdateClientConnState to call picker.Build")
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}
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for sc := range b.scStates {
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sc.(*testSubConn).updateState(balancer.SubConnState{ConnectivityState: connectivity.Ready, ConnectionError: nil})
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select {
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case <-validated:
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case <-ctx.Done():
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t.Fatalf("timed out waiting for UpdateClientConnState to call picker.Build")
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}
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}
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}
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