test(interfaces): Add tests for network conversion

These tests should be an exhaustive set of tests for the parsing
of Debian interface files and generation of equivilent networkd
config files.

network/interface_test.go

@@ -0,0 +1,321 @@
+package network
+
+import (
+	"net"
+	"reflect"
+	"testing"
+)
+
+func TestPhysicalInterfaceName(t *testing.T) {
+	p := physicalInterface{logicalInterface{name: "testname"}}
+	if p.Name() != "testname" {
+		t.FailNow()
+	}
+}
+
+func TestPhysicalInterfaceNetdev(t *testing.T) {
+	p := physicalInterface{}
+	if p.Netdev() != "" {
+		t.FailNow()
+	}
+}
+
+func TestPhysicalInterfaceLink(t *testing.T) {
+	p := physicalInterface{}
+	if p.Link() != "" {
+		t.FailNow()
+	}
+}
+
+func TestPhysicalInterfaceNetwork(t *testing.T) {
+	p := physicalInterface{logicalInterface{
+		name: "testname",
+		children: []InterfaceGenerator{
+			&bondInterface{
+				logicalInterface{
+					name: "testbond1",
+				},
+				nil,
+			},
+			&vlanInterface{
+				logicalInterface{
+					name: "testvlan1",
+				},
+				1,
+				"",
+			},
+			&vlanInterface{
+				logicalInterface{
+					name: "testvlan2",
+				},
+				1,
+				"",
+			},
+		},
+	}}
+	network := `[Match]
+Name=testname
+
+[Network]
+Bond=testbond1
+VLAN=testvlan1
+VLAN=testvlan2
+`
+	if p.Network() != network {
+		t.FailNow()
+	}
+}
+
+func TestBondInterfaceName(t *testing.T) {
+	b := bondInterface{logicalInterface{name: "testname"}, nil}
+	if b.Name() != "testname" {
+		t.FailNow()
+	}
+}
+
+func TestBondInterfaceNetdev(t *testing.T) {
+	b := bondInterface{logicalInterface{name: "testname"}, nil}
+	netdev := `[NetDev]
+Kind=bond
+Name=testname
+`
+	if b.Netdev() != netdev {
+		t.FailNow()
+	}
+}
+
+func TestBondInterfaceLink(t *testing.T) {
+	b := bondInterface{}
+	if b.Link() != "" {
+		t.FailNow()
+	}
+}
+
+func TestBondInterfaceNetwork(t *testing.T) {
+	b := bondInterface{
+		logicalInterface{
+			name:   "testname",
+			config: configMethodDHCP{},
+			children: []InterfaceGenerator{
+				&bondInterface{
+					logicalInterface{
+						name: "testbond1",
+					},
+					nil,
+				},
+				&vlanInterface{
+					logicalInterface{
+						name: "testvlan1",
+					},
+					1,
+					"",
+				},
+				&vlanInterface{
+					logicalInterface{
+						name: "testvlan2",
+					},
+					1,
+					"",
+				},
+			},
+		},
+		nil,
+	}
+	network := `[Match]
+Name=testname
+
+[Network]
+Bond=testbond1
+VLAN=testvlan1
+VLAN=testvlan2
+DHCP=true
+`
+	if b.Network() != network {
+		t.FailNow()
+	}
+}
+
+func TestVLANInterfaceName(t *testing.T) {
+	v := vlanInterface{logicalInterface{name: "testname"}, 1, ""}
+	if v.Name() != "testname" {
+		t.FailNow()
+	}
+}
+
+func TestVLANInterfaceNetdev(t *testing.T) {
+	v := vlanInterface{logicalInterface{name: "testname"}, 1, ""}
+	netdev := `[NetDev]
+Kind=vlan
+Name=testname
+
+[VLAN]
+Id=1
+`
+	if v.Netdev() != netdev {
+		t.FailNow()
+	}
+}
+
+func TestVLANInterfaceLink(t *testing.T) {
+	v := vlanInterface{}
+	if v.Link() != "" {
+		t.FailNow()
+	}
+}
+
+func TestVLANInterfaceNetwork(t *testing.T) {
+	v := vlanInterface{
+		logicalInterface{
+			name: "testname",
+			config: configMethodStatic{
+				address: net.IPNet{
+					IP:   []byte{192, 168, 1, 100},
+					Mask: []byte{255, 255, 255, 0},
+				},
+				nameservers: []net.IP{
+					[]byte{8, 8, 8, 8},
+				},
+				routes: []route{
+					route{
+						destination: net.IPNet{
+							IP:   []byte{0, 0, 0, 0},
+							Mask: []byte{0, 0, 0, 0},
+						},
+						gateway: []byte{1, 2, 3, 4},
+					},
+				},
+			},
+		},
+		0,
+		"",
+	}
+	network := `[Match]
+Name=testname
+
+[Network]
+DNS=8.8.8.8
+
+[Address]
+Address=192.168.1.100/24
+
+[Route]
+Destination=0.0.0.0/0
+Gateway=1.2.3.4
+`
+	if v.Network() != network {
+		t.Log(v.Network())
+		t.FailNow()
+	}
+}
+
+func TestBuildInterfacesLo(t *testing.T) {
+	stanzas := []*stanzaInterface{
+		&stanzaInterface{
+			name:         "lo",
+			kind:         interfacePhysical,
+			auto:         false,
+			configMethod: configMethodLoopback{},
+			options:      map[string][]string{},
+		},
+	}
+	interfaces := buildInterfaces(stanzas)
+	if len(interfaces) != 0 {
+		t.FailNow()
+	}
+}
+
+func TestBuildInterfaces(t *testing.T) {
+	stanzas := []*stanzaInterface{
+		&stanzaInterface{
+			name:         "eth0",
+			kind:         interfacePhysical,
+			auto:         false,
+			configMethod: configMethodManual{},
+			options:      map[string][]string{},
+		},
+		&stanzaInterface{
+			name:         "bond0",
+			kind:         interfaceBond,
+			auto:         false,
+			configMethod: configMethodManual{},
+			options: map[string][]string{
+				"slaves": []string{"eth0"},
+			},
+		},
+		&stanzaInterface{
+			name:         "bond1",
+			kind:         interfaceBond,
+			auto:         false,
+			configMethod: configMethodManual{},
+			options: map[string][]string{
+				"slaves": []string{"bond0"},
+			},
+		},
+		&stanzaInterface{
+			name:         "vlan0",
+			kind:         interfaceVLAN,
+			auto:         false,
+			configMethod: configMethodManual{},
+			options: map[string][]string{
+				"id":         []string{"0"},
+				"raw_device": []string{"eth0"},
+			},
+		},
+		&stanzaInterface{
+			name:         "vlan1",
+			kind:         interfaceVLAN,
+			auto:         false,
+			configMethod: configMethodManual{},
+			options: map[string][]string{
+				"id":         []string{"1"},
+				"raw_device": []string{"bond0"},
+			},
+		},
+	}
+	interfaces := buildInterfaces(stanzas)
+	vlan1 := &vlanInterface{
+		logicalInterface{
+			name:     "vlan1",
+			config:   configMethodManual{},
+			children: []InterfaceGenerator{},
+		},
+		1,
+		"bond0",
+	}
+	vlan0 := &vlanInterface{
+		logicalInterface{
+			name:     "vlan0",
+			config:   configMethodManual{},
+			children: []InterfaceGenerator{},
+		},
+		0,
+		"eth0",
+	}
+	bond1 := &bondInterface{
+		logicalInterface{
+			name:     "bond1",
+			config:   configMethodManual{},
+			children: []InterfaceGenerator{},
+		},
+		[]string{"bond0"},
+	}
+	bond0 := &bondInterface{
+		logicalInterface{
+			name:     "bond0",
+			config:   configMethodManual{},
+			children: []InterfaceGenerator{vlan1, bond1},
+		},
+		[]string{"eth0"},
+	}
+	eth0 := &physicalInterface{
+		logicalInterface{
+			name:     "eth0",
+			config:   configMethodManual{},
+			children: []InterfaceGenerator{vlan0, bond0},
+		},
+	}
+	expect := []InterfaceGenerator{eth0, bond0, bond1, vlan0, vlan1}
+	if !reflect.DeepEqual(interfaces, expect) {
+		t.FailNow()
+	}
+}