network: add unit tests for internal flag

Signed-off-by: ChengyuZhu6 <[email protected]>

Author: ChengyuZhu6

cmd/nerdctl/network/network_create_linux_test.go

@@ -17,6 +17,7 @@
 package network
 
 import (
+	"encoding/json"
 	"fmt"
 	"net"
 	"strings"
@@ -107,6 +108,53 @@ func TestNetworkCreate(t *testing.T) {
 				}
 			},
 		},
+		{
+			Description: "internal enabled",
+			Setup: func(data test.Data, helpers test.Helpers) {
+				helpers.Ensure("network", "create", "--internal", data.Identifier())
+				netw := nerdtest.InspectNetwork(helpers, data.Identifier())
+				assert.Equal(t, len(netw.IPAM.Config), 1)
+				data.Labels().Set("subnet", netw.IPAM.Config[0].Subnet)
+			},
+			Cleanup: func(data test.Data, helpers test.Helpers) {
+				helpers.Anyhow("network", "rm", data.Identifier())
+			},
+			Command: func(data test.Data, helpers test.Helpers) test.TestableCommand {
+				return helpers.Command("run", "--rm", "--net", data.Identifier(), testutil.CommonImage, "ip", "route")
+			},
+			Expected: func(data test.Data, helpers test.Helpers) *test.Expected {
+				return &test.Expected{
+					ExitCode: 0,
+					Output: func(stdout string, t tig.T) {
+						assert.Assert(t, strings.Contains(stdout, data.Labels().Get("subnet")))
+						assert.Assert(t, !strings.Contains(stdout, "default "))
+						if nerdtest.IsDocker() {
+							return
+						}
+						nativeNet := nerdtest.InspectNetworkNative(helpers, data.Identifier())
+						var cni struct {
+							Plugins []struct {
+								Type   string `json:"type"`
+								IsGW   bool   `json:"isGateway"`
+								IPMasq bool   `json:"ipMasq"`
+							} `json:"plugins"`
+						}
+						_ = json.Unmarshal(nativeNet.CNI, &cni)
+						// bridge plugin assertions and no portmap
+						foundBridge := false
+						for _, p := range cni.Plugins {
+							assert.Assert(t, p.Type != "portmap")
+							if p.Type == "bridge" {
+								foundBridge = true
+								assert.Assert(t, !p.IsGW)
+								assert.Assert(t, !p.IPMasq)
+							}
+						}
+						assert.Assert(t, foundBridge)
+					},
+				}
+			},
+		},
 	}
 
 	testCase.Run(t)

pkg/testutil/nerdtest/utilities.go

@@ -88,6 +88,19 @@ func InspectNetwork(helpers test.Helpers, name string) dockercompat.Network {
 	return res
 }
 
+func InspectNetworkNative(helpers test.Helpers, name string) native.Network {
+	helpers.T().Helper()
+	var res native.Network
+	cmd := helpers.Command("network", "inspect", "--mode", "native", name)
+	cmd.Run(&test.Expected{
+		Output: expect.JSON([]native.Network{}, func(dc []native.Network, t tig.T) {
+			assert.Equal(t, 1, len(dc), "Unexpectedly got multiple results")
+			res = dc[0]
+		}),
+	})
+	return res
+}
+
 func InspectImage(helpers test.Helpers, name string) dockercompat.Image {
 	helpers.T().Helper()
 	var res dockercompat.Image