Function TestDeltaDERPMap

control/controlclient/map_test.go:1046–1149

(t *testing.T)

}

func TestDeltaDERPMap(t *testing.T) {
	regions1 := map[int]*tailcfg.DERPRegion{
		1: {
			RegionID: 1,
			Nodes: []*tailcfg.DERPNode{{
				Name:     "derp1a",
				RegionID: 1,
				HostName: "derp1a" + tailcfg.DotInvalid,
				IPv4:     "169.254.169.254",
				IPv6:     "none",
			}},
		},
	}

	// As above, but with a changed IPv4 addr
	regions2 := map[int]*tailcfg.DERPRegion{1: regions1[1].Clone()}
	regions2[1].Nodes[0].IPv4 = "127.0.0.1"

	type step struct {
		got  *tailcfg.DERPMap
		want *tailcfg.DERPMap
	}
	tests := []struct {
		name  string
		steps []step
	}{
		{
			name: "nothing-to-nothing",
			steps: []step{
				{nil, nil},
				{nil, nil},
			},
		},
		{
			name: "regions-sticky",
			steps: []step{
				{&tailcfg.DERPMap{Regions: regions1}, &tailcfg.DERPMap{Regions: regions1}},
				{&tailcfg.DERPMap{}, &tailcfg.DERPMap{Regions: regions1}},
			},
		},
		{
			name: "regions-change",
			steps: []step{
				{&tailcfg.DERPMap{Regions: regions1}, &tailcfg.DERPMap{Regions: regions1}},
				{&tailcfg.DERPMap{Regions: regions2}, &tailcfg.DERPMap{Regions: regions2}},
			},
		},
		{
			name: "home-params",
			steps: []step{
				// Send a DERP map
				{&tailcfg.DERPMap{Regions: regions1}, &tailcfg.DERPMap{Regions: regions1}},
				// Send home params, want to still have the same regions
				{
					&tailcfg.DERPMap{HomeParams: &tailcfg.DERPHomeParams{
						RegionScore: map[int]float64{1: 0.5},
					}},
					&tailcfg.DERPMap{Regions: regions1, HomeParams: &tailcfg.DERPHomeParams{