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resolver_test.go
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resolver_test.go
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package goutube
import (
"fmt"
"github.com/Brijeshlakkad/ring"
"github.com/stretchr/testify/require"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/resolver"
"google.golang.org/grpc/serviceconfig"
"net"
"testing"
)
func TestResolver(t *testing.T) {
l, err := net.Listen("tcp", "127.0.0.1:0")
require.NoError(t, err)
tlsConfig, err := SetupTLSConfig(TLSConfig{
CertFile: ServerCertFile,
KeyFile: ServerKeyFile,
CAFile: CAFile,
Server: true,
ServerAddress: "127.0.0.1",
})
require.NoError(t, err)
serverCreds := credentials.NewTLS(tlsConfig)
leader, wantState, teardown := setupTestDistributedLocus(t, 5)
defer teardown()
srv, err := NewServer(
&ServerConfig{
ResolverHelperConfig: &ResolverHelperConfig{
GetServerer: leader,
},
},
grpc.Creds(serverCreds))
require.NoError(t, err)
go srv.Serve(l)
conn := &clientConn{}
tlsConfig, err = SetupTLSConfig(TLSConfig{
CertFile: RootClientCertFile,
KeyFile: RootClientKeyFile,
CAFile: CAFile,
Server: false,
ServerAddress: "127.0.0.1",
})
require.NoError(t, err)
clientCreds := credentials.NewTLS(tlsConfig)
opts := resolver.BuildOptions{
DialCreds: clientCreds,
}
r := &Resolver{}
_, err = r.Build(
resolver.Target{
Endpoint: l.Addr().String(),
},
conn,
opts,
)
require.NoError(t, err)
require.Equal(t, len(wantState.Addresses), len(conn.state.Addresses))
conn.state.Addresses = nil
r.ResolveNow(resolver.ResolveNowOptions{})
require.Equal(t, len(wantState.Addresses), len(conn.state.Addresses))
}
var _ resolver.ClientConn = (*clientConn)(nil)
type clientConn struct {
resolver.ClientConn
state resolver.State
}
func (c *clientConn) UpdateState(state resolver.State) error {
c.state = state
return nil
}
func (c *clientConn) ReportError(err error) {}
func (c *clientConn) NewAddress(addrs []resolver.Address) {}
func (c *clientConn) NewServiceConfig(config string) {}
func (c *clientConn) ParseServiceConfig(
config string,
) *serviceconfig.ParseResult {
return nil
}
func setupTestDistributedLocus(t *testing.T, followerCount int) (*DistributedLoci, resolver.State, func()) {
var teardowns []func()
var expectedServers []resolver.Address
distributedLoci_Leader, teardown_Leader := setupTestDistributedLoci(t,
LeaderRule,
fmt.Sprintf("distributed-locus-leader"),
&ring.Config{MemberType: ring.ShardMember}) // Will be part of the distributedLoci_Leader_1's ring.
teardowns = append(teardowns, teardown_Leader)
for i := 0; i < followerCount; i++ {
distributedLoci_Follower, teardown_Follower := setupTestDistributedLoci(t,
FollowerRule,
fmt.Sprintf("distributed-locus-follower-2-%d", i),
nil)
teardowns = append(teardowns, teardown_Follower)
// Join replication cluster
err := distributedLoci_Leader.Join(distributedLoci_Follower.config.Distributed.StreamLayer.Addr().String(), distributedLoci_Follower.config.Distributed.Rule)
require.NoError(t, err)
}
loadbalancer_1, teardown_loadbalancer_1 := setupTestDistributedLoci(t,
FollowerRule,
fmt.Sprintf("loadbalancer-1"),
&ring.Config{
MemberType: ring.LoadBalancerMember,
SeedAddresses: []string{distributedLoci_Leader.ring.BindAddr},
})
teardowns = append(teardowns, teardown_loadbalancer_1)
expectedServers = append(expectedServers, resolver.Address{
Addr: loadbalancer_1.config.Distributed.StreamLayer.Addr().String(),
})
loadbalancer_2, teardown_loadbalancer_2 := setupTestDistributedLoci(t,
FollowerRule,
fmt.Sprintf("loadbalancer-2"),
&ring.Config{
MemberType: ring.LoadBalancerMember,
SeedAddresses: []string{distributedLoci_Leader.ring.BindAddr},
})
teardowns = append(teardowns, teardown_loadbalancer_2)
expectedServers = append(expectedServers, resolver.Address{
Addr: loadbalancer_2.config.Distributed.StreamLayer.Addr().String(),
})
return distributedLoci_Leader, resolver.State{
Addresses: expectedServers,
}, func() {
for _, teardown := range teardowns {
teardown()
}
}
}