Add integration test for network connect with alias

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

integration/service/network_test.go

@@ -0,0 +1,86 @@
+package service
+
+import (
+	"context"
+	"testing"
+
+	"github.com/docker/docker/api/types"
+	"github.com/docker/docker/api/types/container"
+	"github.com/docker/docker/api/types/network"
+	"github.com/docker/docker/integration-cli/request"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestDockerNetworkConnectAlias(t *testing.T) {
+	defer setupTest(t)()
+	d := newSwarm(t)
+	defer d.Stop(t)
+	client, err := request.NewClientForHost(d.Sock())
+	require.NoError(t, err)
+	ctx := context.Background()
+
+	name := "test-alias"
+	_, err = client.NetworkCreate(ctx, name, types.NetworkCreate{
+		Driver:     "overlay",
+		Attachable: true,
+	})
+	require.NoError(t, err)
+	_, err = client.ContainerCreate(ctx,
+		&container.Config{
+			Cmd:   []string{"top"},
+			Image: "busybox",
+		},
+		&container.HostConfig{},
+		&network.NetworkingConfig{
+			EndpointsConfig: map[string]*network.EndpointSettings{
+				name: {},
+			},
+		},
+		"ng1",
+	)
+	require.NoError(t, err)
+	err = client.NetworkConnect(ctx, name, "ng1", &network.EndpointSettings{
+		Aliases: []string{
+			"aaa",
+		},
+	})
+	require.NoError(t, err)
+
+	err = client.ContainerStart(ctx, "ng1", types.ContainerStartOptions{})
+	require.NoError(t, err)
+
+	ng1, err := client.ContainerInspect(ctx, "ng1")
+	require.NoError(t, err)
+	assert.Equal(t, len(ng1.NetworkSettings.Networks[name].Aliases), 2)
+	assert.Equal(t, ng1.NetworkSettings.Networks[name].Aliases[0], "aaa")
+
+	_, err = client.ContainerCreate(ctx,
+		&container.Config{
+			Cmd:   []string{"top"},
+			Image: "busybox",
+		},
+		&container.HostConfig{},
+		&network.NetworkingConfig{
+			EndpointsConfig: map[string]*network.EndpointSettings{
+				name: {},
+			},
+		},
+		"ng2",
+	)
+	require.NoError(t, err)
+	err = client.NetworkConnect(ctx, name, "ng2", &network.EndpointSettings{
+		Aliases: []string{
+			"bbb",
+		},
+	})
+	require.NoError(t, err)
+
+	err = client.ContainerStart(ctx, "ng2", types.ContainerStartOptions{})
+	require.NoError(t, err)
+
+	ng2, err := client.ContainerInspect(ctx, "ng2")
+	require.NoError(t, err)
+	assert.Equal(t, len(ng2.NetworkSettings.Networks[name].Aliases), 2)
+	assert.Equal(t, ng2.NetworkSettings.Networks[name].Aliases[0], "bbb")
+}