146 lines
2.6 KiB
Go
146 lines
2.6 KiB
Go
package tcp
|
|
|
|
import (
|
|
"net"
|
|
"testing"
|
|
"time"
|
|
|
|
"github.com/stretchr/testify/assert"
|
|
"github.com/stretchr/testify/require"
|
|
)
|
|
|
|
type fakeConn struct {
|
|
writeCall map[string]int
|
|
closeCall int
|
|
}
|
|
|
|
func (f *fakeConn) Read(b []byte) (n int, err error) {
|
|
panic("implement me")
|
|
}
|
|
|
|
func (f *fakeConn) Write(b []byte) (n int, err error) {
|
|
f.writeCall[string(b)]++
|
|
return len(b), nil
|
|
}
|
|
|
|
func (f *fakeConn) Close() error {
|
|
f.closeCall++
|
|
return nil
|
|
}
|
|
|
|
func (f *fakeConn) LocalAddr() net.Addr {
|
|
panic("implement me")
|
|
}
|
|
|
|
func (f *fakeConn) RemoteAddr() net.Addr {
|
|
panic("implement me")
|
|
}
|
|
|
|
func (f *fakeConn) SetDeadline(t time.Time) error {
|
|
panic("implement me")
|
|
}
|
|
|
|
func (f *fakeConn) SetReadDeadline(t time.Time) error {
|
|
panic("implement me")
|
|
}
|
|
|
|
func (f *fakeConn) SetWriteDeadline(t time.Time) error {
|
|
panic("implement me")
|
|
}
|
|
|
|
func (f *fakeConn) CloseWrite() error {
|
|
panic("implement me")
|
|
}
|
|
|
|
func TestLoadBalancing(t *testing.T) {
|
|
testCases := []struct {
|
|
desc string
|
|
serversWeight map[string]int
|
|
totalCall int
|
|
expectedWrite map[string]int
|
|
expectedClose int
|
|
}{
|
|
{
|
|
desc: "RoundRobin",
|
|
serversWeight: map[string]int{
|
|
"h1": 1,
|
|
"h2": 1,
|
|
},
|
|
totalCall: 4,
|
|
expectedWrite: map[string]int{
|
|
"h1": 2,
|
|
"h2": 2,
|
|
},
|
|
},
|
|
{
|
|
desc: "WeighedRoundRobin",
|
|
serversWeight: map[string]int{
|
|
"h1": 3,
|
|
"h2": 1,
|
|
},
|
|
totalCall: 4,
|
|
expectedWrite: map[string]int{
|
|
"h1": 3,
|
|
"h2": 1,
|
|
},
|
|
},
|
|
{
|
|
desc: "WeighedRoundRobin with more call",
|
|
serversWeight: map[string]int{
|
|
"h1": 3,
|
|
"h2": 1,
|
|
},
|
|
totalCall: 16,
|
|
expectedWrite: map[string]int{
|
|
"h1": 12,
|
|
"h2": 4,
|
|
},
|
|
},
|
|
{
|
|
desc: "WeighedRoundRobin with one 0 weight server",
|
|
serversWeight: map[string]int{
|
|
"h1": 3,
|
|
"h2": 0,
|
|
},
|
|
totalCall: 16,
|
|
expectedWrite: map[string]int{
|
|
"h1": 16,
|
|
},
|
|
},
|
|
{
|
|
desc: "WeighedRoundRobin with all servers with 0 weight",
|
|
serversWeight: map[string]int{
|
|
"h1": 0,
|
|
"h2": 0,
|
|
"h3": 0,
|
|
},
|
|
totalCall: 10,
|
|
expectedWrite: map[string]int{},
|
|
expectedClose: 10,
|
|
},
|
|
}
|
|
|
|
for _, test := range testCases {
|
|
test := test
|
|
t.Run(test.desc, func(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
balancer := NewWRRLoadBalancer()
|
|
for server, weight := range test.serversWeight {
|
|
server := server
|
|
balancer.AddWeightServer(HandlerFunc(func(conn WriteCloser) {
|
|
_, err := conn.Write([]byte(server))
|
|
require.NoError(t, err)
|
|
}), &weight)
|
|
}
|
|
|
|
conn := &fakeConn{writeCall: make(map[string]int)}
|
|
for range test.totalCall {
|
|
balancer.ServeTCP(conn)
|
|
}
|
|
|
|
assert.Equal(t, test.expectedWrite, conn.writeCall)
|
|
assert.Equal(t, test.expectedClose, conn.closeCall)
|
|
})
|
|
}
|
|
}
|