mirror of https://github.com/grpc/grpc-go.git
133 lines
4.2 KiB
Go
133 lines
4.2 KiB
Go
/*
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*
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* Copyright 2024 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 pickfirst
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import (
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"context"
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"errors"
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"fmt"
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"testing"
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"time"
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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/internal/grpctest"
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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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const (
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// Default timeout for tests in this package.
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defaultTestTimeout = 10 * time.Second
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// Default short timeout, to be used when waiting for events which are not
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// expected to happen.
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defaultTestShortTimeout = 100 * time.Millisecond
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)
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type s struct {
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grpctest.Tester
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}
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func Test(t *testing.T) {
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grpctest.RunSubTests(t, s{})
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}
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// TestPickFirst_InitialResolverError sends a resolver error to the balancer
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// before a valid resolver update. It verifies that the clientconn state is
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// updated to TRANSIENT_FAILURE.
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func (s) TestPickFirst_InitialResolverError(t *testing.T) {
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ctx, cancel := context.WithTimeout(context.Background(), defaultTestTimeout)
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defer cancel()
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cc := testutils.NewBalancerClientConn(t)
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bal := balancer.Get(Name).Build(cc, balancer.BuildOptions{})
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defer bal.Close()
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bal.ResolverError(errors.New("resolution failed: test error"))
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if err := cc.WaitForConnectivityState(ctx, connectivity.TransientFailure); err != nil {
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t.Fatalf("cc.WaitForConnectivityState(%v) returned error: %v", connectivity.TransientFailure, err)
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}
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// After sending a valid update, the LB policy should report CONNECTING.
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ccState := balancer.ClientConnState{
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ResolverState: resolver.State{
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Endpoints: []resolver.Endpoint{
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{Addresses: []resolver.Address{{Addr: "1.1.1.1:1"}}},
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{Addresses: []resolver.Address{{Addr: "2.2.2.2:2"}}},
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},
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},
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}
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if err := bal.UpdateClientConnState(ccState); err != nil {
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t.Fatalf("UpdateClientConnState(%v) returned error: %v", ccState, err)
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}
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if err := cc.WaitForConnectivityState(ctx, connectivity.Connecting); err != nil {
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t.Fatalf("cc.WaitForConnectivityState(%v) returned error: %v", connectivity.Connecting, err)
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}
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}
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// TestPickFirst_ResolverErrorinTF sends a resolver error to the balancer
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// before when it's attempting to connect to a SubConn TRANSIENT_FAILURE. It
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// verifies that the picker is updated and the SubConn is not closed.
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func (s) TestPickFirst_ResolverErrorinTF(t *testing.T) {
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ctx, cancel := context.WithTimeout(context.Background(), defaultTestTimeout)
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defer cancel()
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cc := testutils.NewBalancerClientConn(t)
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bal := balancer.Get(Name).Build(cc, balancer.BuildOptions{})
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defer bal.Close()
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// After sending a valid update, the LB policy should report CONNECTING.
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ccState := balancer.ClientConnState{
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ResolverState: resolver.State{
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Endpoints: []resolver.Endpoint{
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{Addresses: []resolver.Address{{Addr: "1.1.1.1:1"}}},
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},
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},
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}
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if err := bal.UpdateClientConnState(ccState); err != nil {
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t.Fatalf("UpdateClientConnState(%v) returned error: %v", ccState, err)
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}
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sc1 := <-cc.NewSubConnCh
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if err := cc.WaitForConnectivityState(ctx, connectivity.Connecting); err != nil {
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t.Fatalf("cc.WaitForConnectivityState(%v) returned error: %v", connectivity.Connecting, err)
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}
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scErr := fmt.Errorf("test error: connection refused")
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sc1.UpdateState(balancer.SubConnState{
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ConnectivityState: connectivity.TransientFailure,
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ConnectionError: scErr,
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})
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if err := cc.WaitForPickerWithErr(ctx, scErr); err != nil {
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t.Fatalf("cc.WaitForPickerWithErr(%v) returned error: %v", scErr, err)
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}
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bal.ResolverError(errors.New("resolution failed: test error"))
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if err := cc.WaitForErrPicker(ctx); err != nil {
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t.Fatalf("cc.WaitForPickerWithErr() returned error: %v", err)
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}
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select {
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case <-time.After(defaultTestShortTimeout):
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case sc := <-cc.ShutdownSubConnCh:
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t.Fatalf("Unexpected SubConn shutdown: %v", sc)
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}
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}
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