route/vendor/google.golang.org/grpc/resolver_test.go

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2018-01-03 19:19:49 +00:00
/*
*
* Copyright 2017 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 (
"fmt"
"strings"
"testing"
"time"
"google.golang.org/grpc/resolver"
"google.golang.org/grpc/resolver/manual"
"google.golang.org/grpc/test/leakcheck"
)
func TestResolverServiceConfigBeforeAddressNotPanic(t *testing.T) {
defer leakcheck.Check(t)
r, rcleanup := manual.GenerateAndRegisterManualResolver()
defer rcleanup()
cc, err := Dial(r.Scheme()+":///test.server", WithInsecure())
if err != nil {
t.Fatalf("failed to dial: %v", err)
}
defer cc.Close()
// SwitchBalancer before NewAddress. There was no balancer created, this
// makes sure we don't call close on nil balancerWrapper.
r.NewServiceConfig(`{"loadBalancingPolicy": "round_robin"}`) // This should not panic.
time.Sleep(time.Second) // Sleep to make sure the service config is handled by ClientConn.
}
func TestResolverEmptyUpdateNotPanic(t *testing.T) {
defer leakcheck.Check(t)
r, rcleanup := manual.GenerateAndRegisterManualResolver()
defer rcleanup()
cc, err := Dial(r.Scheme()+":///test.server", WithInsecure())
if err != nil {
t.Fatalf("failed to dial: %v", err)
}
defer cc.Close()
// This make sure we don't create addrConn with empty address list.
r.NewAddress([]resolver.Address{}) // This should not panic.
time.Sleep(time.Second) // Sleep to make sure the service config is handled by ClientConn.
}
var (
errTestResolverFailBuild = fmt.Errorf("test resolver build error")
)
type testResolverFailBuilder struct {
buildOpt resolver.BuildOption
}
func (r *testResolverFailBuilder) Build(target resolver.Target, cc resolver.ClientConn, opts resolver.BuildOption) (resolver.Resolver, error) {
r.buildOpt = opts
return nil, errTestResolverFailBuild
}
func (r *testResolverFailBuilder) Scheme() string {
return "testResolverFailBuilderScheme"
}
// Tests that options in WithResolverUserOptions are passed to resolver.Build().
func TestResolverUserOptions(t *testing.T) {
r := &testResolverFailBuilder{}
userOpt := "testUserOpt"
_, err := Dial("scheme:///test.server", WithInsecure(),
withResolverBuilder(r),
WithResolverUserOptions(userOpt),
)
if err == nil || !strings.Contains(err.Error(), errTestResolverFailBuild.Error()) {
t.Fatalf("Dial with testResolverFailBuilder returns err: %v, want: %v", err, errTestResolverFailBuild)
}
if r.buildOpt.UserOptions != userOpt {
t.Fatalf("buildOpt.UserOptions = %T %+v, want %v", r.buildOpt.UserOptions, r.buildOpt.UserOptions, userOpt)
}
}