fix(docker): avoid specifying the MAC address of container for Docker API < v1.44 BE-10880 (#12178)

api/docker/container_test.go

@@ -0,0 +1,52 @@
+package docker
+
+import (
+	"testing"
+
+	"github.com/docker/docker/api/types/network"
+	"github.com/stretchr/testify/require"
+)
+
+func TestApplyVersionConstraint(t *testing.T) {
+	initialNet := network.NetworkingConfig{
+		EndpointsConfig: map[string]*network.EndpointSettings{
+			"key1": {
+				MacAddress: "mac1",
+				EndpointID: "endpointID1",
+			},
+			"key2": {
+				MacAddress: "mac2",
+				EndpointID: "endpointID2",
+			},
+		},
+	}
+
+	f := func(currentVer string, constraint string, success, emptyMac bool) {
+		t.Helper()
+
+		transformedNet, err := applyVersionConstraint(currentVer, constraint, initialNet, clearMacAddrs)
+		if success {
+			require.NoError(t, err)
+		} else {
+			require.Error(t, err)
+		}
+
+		require.Len(t, transformedNet.EndpointsConfig, len(initialNet.EndpointsConfig))
+
+		for k := range initialNet.EndpointsConfig {
+			if emptyMac {
+				require.NotEqual(t, initialNet.EndpointsConfig[k], transformedNet.EndpointsConfig[k])
+				require.Empty(t, transformedNet.EndpointsConfig[k].MacAddress)
+
+				continue
+			}
+
+			require.Equal(t, initialNet.EndpointsConfig[k], transformedNet.EndpointsConfig[k])
+		}
+	}
+
+	f("1.45", "< 1.44", true, false)  // No transformation
+	f("1.43", "< 1.44", true, true)   // Transformation
+	f("a.b.", "< 1.44", true, false)  // Invalid current version
+	f("1.45", "z 1.44", false, false) // Invalid version constraint
+}