93 lines
2.3 KiB
Go
93 lines
2.3 KiB
Go
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package grpc
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import (
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"context"
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"fmt"
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"strings"
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"testing"
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"time"
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"github.com/hashicorp/consul/agent/grpc/internal/testservice"
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"github.com/hashicorp/consul/agent/grpc/resolver"
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"github.com/hashicorp/consul/agent/metadata"
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"github.com/stretchr/testify/require"
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)
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func TestNewDialer(t *testing.T) {
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// TODO: conn is closed on errors
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// TODO: with TLS enabled
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}
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func TestClientConnPool_IntegrationWithGRPCResolver_Failover(t *testing.T) {
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count := 4
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cfg := resolver.Config{Datacenter: "dc1", Scheme: newScheme(t.Name())}
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res := resolver.NewServerResolverBuilder(cfg, fakeNodes{num: count})
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resolver.RegisterWithGRPC(res)
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pool := NewClientConnPool(res, nil)
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for i := 0; i < count; i++ {
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name := fmt.Sprintf("server-%d", i)
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srv := newTestServer(t, name, "dc1")
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res.AddServer(srv.Metadata())
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t.Cleanup(srv.shutdown)
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}
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conn, err := pool.ClientConn("dc1")
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require.NoError(t, err)
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client := testservice.NewSimpleClient(conn)
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ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
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t.Cleanup(cancel)
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first, err := client.Something(ctx, &testservice.Req{})
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require.NoError(t, err)
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res.RemoveServer(&metadata.Server{ID: first.ServerName, Datacenter: "dc1"})
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resp, err := client.Something(ctx, &testservice.Req{})
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require.NoError(t, err)
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require.NotEqual(t, resp.ServerName, first.ServerName)
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}
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func newScheme(n string) string {
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s := strings.Replace(n, "/", "", -1)
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s = strings.Replace(s, "_", "", -1)
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return strings.ToLower(s)
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}
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type fakeNodes struct {
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num int
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}
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func (n fakeNodes) NumNodes() int {
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return n.num
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}
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func TestClientConnPool_IntegrationWithGRPCResolver_MultiDC(t *testing.T) {
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dcs := []string{"dc1", "dc2", "dc3"}
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cfg := resolver.Config{Datacenter: "dc1", Scheme: newScheme(t.Name())}
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res := resolver.NewServerResolverBuilder(cfg, fakeNodes{num: 1})
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resolver.RegisterWithGRPC(res)
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pool := NewClientConnPool(res, nil)
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for _, dc := range dcs {
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name := "server-0-" + dc
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srv := newTestServer(t, name, dc)
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res.AddServer(srv.Metadata())
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t.Cleanup(srv.shutdown)
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}
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ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
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t.Cleanup(cancel)
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for _, dc := range dcs {
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conn, err := pool.ClientConn(dc)
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require.NoError(t, err)
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client := testservice.NewSimpleClient(conn)
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resp, err := client.Something(ctx, &testservice.Req{})
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require.NoError(t, err)
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require.Equal(t, resp.Datacenter, dc)
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}
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}
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