cloudflared-mirror/edgediscovery/allregions/regions_test.go

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package allregions
import (
"net"
"testing"
"github.com/stretchr/testify/assert"
)
var (
addr0 = net.TCPAddr{
IP: net.ParseIP("123.4.5.0"),
Port: 8000,
Zone: "",
}
addr1 = net.TCPAddr{
IP: net.ParseIP("123.4.5.1"),
Port: 8000,
Zone: "",
}
addr2 = net.TCPAddr{
IP: net.ParseIP("123.4.5.2"),
Port: 8000,
Zone: "",
}
addr3 = net.TCPAddr{
IP: net.ParseIP("123.4.5.3"),
Port: 8000,
Zone: "",
}
)
func makeRegions() Regions {
r1 := NewRegion([]*net.TCPAddr{&addr0, &addr1})
r2 := NewRegion([]*net.TCPAddr{&addr2, &addr3})
return Regions{region1: r1, region2: r2}
}
func TestRegions_AddrUsedBy(t *testing.T) {
rs := makeRegions()
addr1 := rs.GetUnusedAddr(nil, 1)
assert.Equal(t, addr1, rs.AddrUsedBy(1))
addr2 := rs.GetUnusedAddr(nil, 2)
assert.Equal(t, addr2, rs.AddrUsedBy(2))
addr3 := rs.GetUnusedAddr(nil, 3)
assert.Equal(t, addr3, rs.AddrUsedBy(3))
}
func TestRegions_Giveback_Region1(t *testing.T) {
rs := makeRegions()
rs.region1.Use(&addr0, 0)
rs.region1.Use(&addr1, 1)
rs.region2.Use(&addr2, 2)
rs.region2.Use(&addr3, 3)
assert.Equal(t, 0, rs.AvailableAddrs())
rs.GiveBack(&addr0)
assert.Equal(t, &addr0, rs.GetUnusedAddr(nil, 3))
}
func TestRegions_Giveback_Region2(t *testing.T) {
rs := makeRegions()
rs.region1.Use(&addr0, 0)
rs.region1.Use(&addr1, 1)
rs.region2.Use(&addr2, 2)
rs.region2.Use(&addr3, 3)
assert.Equal(t, 0, rs.AvailableAddrs())
rs.GiveBack(&addr2)
assert.Equal(t, &addr2, rs.GetUnusedAddr(nil, 2))
}
func TestRegions_GetUnusedAddr_OneAddrLeft(t *testing.T) {
rs := makeRegions()
rs.region1.Use(&addr0, 0)
rs.region1.Use(&addr1, 1)
rs.region2.Use(&addr2, 2)
assert.Equal(t, 1, rs.AvailableAddrs())
assert.Equal(t, &addr3, rs.GetUnusedAddr(nil, 3))
}
func TestRegions_GetUnusedAddr_Excluding_Region1(t *testing.T) {
rs := makeRegions()
rs.region1.Use(&addr0, 0)
rs.region1.Use(&addr1, 1)
assert.Equal(t, 2, rs.AvailableAddrs())
assert.Equal(t, &addr3, rs.GetUnusedAddr(&addr2, 3))
}
func TestRegions_GetUnusedAddr_Excluding_Region2(t *testing.T) {
rs := makeRegions()
rs.region2.Use(&addr2, 0)
rs.region2.Use(&addr3, 1)
assert.Equal(t, 2, rs.AvailableAddrs())
assert.Equal(t, &addr1, rs.GetUnusedAddr(&addr0, 1))
}
func TestNewNoResolveBalancesRegions(t *testing.T) {
type args struct {
addrs []*net.TCPAddr
}
tests := []struct {
name string
args args
}{
{
name: "one address",
args: args{addrs: []*net.TCPAddr{&addr0}},
},
{
name: "two addresses",
args: args{addrs: []*net.TCPAddr{&addr0, &addr1}},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
regions := NewNoResolve(tt.args.addrs)
RegionsIsBalanced(t, regions)
})
}
}
func RegionsIsBalanced(t *testing.T, rs *Regions) {
delta := rs.region1.AvailableAddrs() - rs.region2.AvailableAddrs()
assert.True(t, abs(delta) <= 1)
}
func abs(x int) int {
if x >= 0 {
return x
}
return -x
}