107 lines
3.5 KiB
Go
107 lines
3.5 KiB
Go
// Copyright 2016 The etcd 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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package clientv3
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import (
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"errors"
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"testing"
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"time"
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"golang.org/x/net/context"
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"google.golang.org/grpc"
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)
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var (
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endpoints = []string{"localhost:2379", "localhost:22379", "localhost:32379"}
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)
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func TestBalancerGetUnblocking(t *testing.T) {
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sb := newSimpleBalancer(endpoints)
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unblockingOpts := grpc.BalancerGetOptions{BlockingWait: false}
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_, _, err := sb.Get(context.Background(), unblockingOpts)
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if err != ErrNoAddrAvilable {
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t.Errorf("Get() with no up endpoints should return ErrNoAddrAvailable, got: %v", err)
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}
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down1 := sb.Up(grpc.Address{Addr: endpoints[1]})
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down2 := sb.Up(grpc.Address{Addr: endpoints[2]})
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addrFirst, putFun, err := sb.Get(context.Background(), unblockingOpts)
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if err != nil {
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t.Errorf("Get() with up endpoints should success, got %v", err)
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}
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if addrFirst.Addr != endpoints[1] && addrFirst.Addr != endpoints[2] {
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t.Errorf("Get() didn't return expected address, got %v", addrFirst)
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}
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if putFun == nil {
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t.Errorf("Get() returned unexpected nil put function")
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}
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addrSecond, _, _ := sb.Get(context.Background(), unblockingOpts)
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if addrSecond.Addr != addrSecond.Addr {
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t.Errorf("Get() didn't return the same address as previous call, got %v and %v", addrFirst, addrSecond)
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}
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down1(errors.New("error"))
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down2(errors.New("error"))
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_, _, err = sb.Get(context.Background(), unblockingOpts)
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if err != ErrNoAddrAvilable {
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t.Errorf("Get() with no up endpoints should return ErrNoAddrAvailable, got: %v", err)
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}
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}
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func TestBalancerGetBlocking(t *testing.T) {
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sb := newSimpleBalancer(endpoints)
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blockingOpts := grpc.BalancerGetOptions{BlockingWait: true}
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ctx, _ := context.WithTimeout(context.Background(), time.Millisecond*100)
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_, _, err := sb.Get(ctx, blockingOpts)
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if err != context.DeadlineExceeded {
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t.Errorf("Get() with no up endpoints should timeout, got %v", err)
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}
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downC := make(chan func(error), 1)
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go func() {
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// ensure sb.Up() will be called after sb.Get() to see if Up() releases blocking Get()
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time.Sleep(time.Millisecond * 100)
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downC <- sb.Up(grpc.Address{Addr: endpoints[1]})
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}()
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addrFirst, putFun, err := sb.Get(context.Background(), blockingOpts)
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if err != nil {
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t.Errorf("Get() with up endpoints should success, got %v", err)
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}
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if addrFirst.Addr != endpoints[1] {
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t.Errorf("Get() didn't return expected address, got %v", addrFirst)
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}
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if putFun == nil {
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t.Errorf("Get() returned unexpected nil put function")
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}
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down1 := <-downC
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down2 := sb.Up(grpc.Address{Addr: endpoints[2]})
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addrSecond, _, _ := sb.Get(context.Background(), blockingOpts)
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if addrSecond.Addr != addrSecond.Addr {
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t.Errorf("Get() didn't return the same address as previous call, got %v and %v", addrFirst, addrSecond)
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}
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down1(errors.New("error"))
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down2(errors.New("error"))
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ctx, _ = context.WithTimeout(context.Background(), time.Millisecond*100)
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_, _, err = sb.Get(ctx, blockingOpts)
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if err != context.DeadlineExceeded {
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t.Errorf("Get() with no up endpoints should timeout, got %v", err)
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}
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}
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