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moby--moby/libnetwork/portallocator/portallocator_test.go
David Calavera cc02894a50 Move test specific functions to a testutils package.
This way we won't vendor test related functions in docker anymore.
It also moves netns related functions to a new ns package to be able to
call the ns init function in tests. I think this also helps with the
overall package isolation.

Signed-off-by: David Calavera <david.calavera@gmail.com>
2015-09-07 13:33:28 -04:00

320 lines
7.5 KiB
Go

package portallocator
import (
"net"
"testing"
_ "github.com/docker/libnetwork/testutils"
)
func resetPortAllocator() {
instance = newInstance()
}
func TestRequestNewPort(t *testing.T) {
p := Get()
defer resetPortAllocator()
port, err := p.RequestPort(defaultIP, "tcp", 0)
if err != nil {
t.Fatal(err)
}
if expected := p.Begin; port != expected {
t.Fatalf("Expected port %d got %d", expected, port)
}
}
func TestRequestSpecificPort(t *testing.T) {
p := Get()
defer resetPortAllocator()
port, err := p.RequestPort(defaultIP, "tcp", 5000)
if err != nil {
t.Fatal(err)
}
if port != 5000 {
t.Fatalf("Expected port 5000 got %d", port)
}
}
func TestReleasePort(t *testing.T) {
p := Get()
port, err := p.RequestPort(defaultIP, "tcp", 5000)
if err != nil {
t.Fatal(err)
}
if port != 5000 {
t.Fatalf("Expected port 5000 got %d", port)
}
if err := p.ReleasePort(defaultIP, "tcp", 5000); err != nil {
t.Fatal(err)
}
}
func TestReuseReleasedPort(t *testing.T) {
p := Get()
defer resetPortAllocator()
port, err := p.RequestPort(defaultIP, "tcp", 5000)
if err != nil {
t.Fatal(err)
}
if port != 5000 {
t.Fatalf("Expected port 5000 got %d", port)
}
if err := p.ReleasePort(defaultIP, "tcp", 5000); err != nil {
t.Fatal(err)
}
port, err = p.RequestPort(defaultIP, "tcp", 5000)
if err != nil {
t.Fatal(err)
}
}
func TestReleaseUnreadledPort(t *testing.T) {
p := Get()
defer resetPortAllocator()
port, err := p.RequestPort(defaultIP, "tcp", 5000)
if err != nil {
t.Fatal(err)
}
if port != 5000 {
t.Fatalf("Expected port 5000 got %d", port)
}
port, err = p.RequestPort(defaultIP, "tcp", 5000)
switch err.(type) {
case ErrPortAlreadyAllocated:
default:
t.Fatalf("Expected port allocation error got %s", err)
}
}
func TestUnknowProtocol(t *testing.T) {
if _, err := Get().RequestPort(defaultIP, "tcpp", 0); err != ErrUnknownProtocol {
t.Fatalf("Expected error %s got %s", ErrUnknownProtocol, err)
}
}
func TestAllocateAllPorts(t *testing.T) {
p := Get()
defer resetPortAllocator()
for i := 0; i <= p.End-p.Begin; i++ {
port, err := p.RequestPort(defaultIP, "tcp", 0)
if err != nil {
t.Fatal(err)
}
if expected := p.Begin + i; port != expected {
t.Fatalf("Expected port %d got %d", expected, port)
}
}
if _, err := p.RequestPort(defaultIP, "tcp", 0); err != ErrAllPortsAllocated {
t.Fatalf("Expected error %s got %s", ErrAllPortsAllocated, err)
}
_, err := p.RequestPort(defaultIP, "udp", 0)
if err != nil {
t.Fatal(err)
}
// release a port in the middle and ensure we get another tcp port
port := p.Begin + 5
if err := p.ReleasePort(defaultIP, "tcp", port); err != nil {
t.Fatal(err)
}
newPort, err := p.RequestPort(defaultIP, "tcp", 0)
if err != nil {
t.Fatal(err)
}
if newPort != port {
t.Fatalf("Expected port %d got %d", port, newPort)
}
// now pm.last == newPort, release it so that it's the only free port of
// the range, and ensure we get it back
if err := p.ReleasePort(defaultIP, "tcp", newPort); err != nil {
t.Fatal(err)
}
port, err = p.RequestPort(defaultIP, "tcp", 0)
if err != nil {
t.Fatal(err)
}
if newPort != port {
t.Fatalf("Expected port %d got %d", newPort, port)
}
}
func BenchmarkAllocatePorts(b *testing.B) {
p := Get()
defer resetPortAllocator()
for i := 0; i < b.N; i++ {
for i := 0; i <= p.End-p.Begin; i++ {
port, err := p.RequestPort(defaultIP, "tcp", 0)
if err != nil {
b.Fatal(err)
}
if expected := p.Begin + i; port != expected {
b.Fatalf("Expected port %d got %d", expected, port)
}
}
p.ReleaseAll()
}
}
func TestPortAllocation(t *testing.T) {
p := Get()
defer resetPortAllocator()
ip := net.ParseIP("192.168.0.1")
ip2 := net.ParseIP("192.168.0.2")
if port, err := p.RequestPort(ip, "tcp", 80); err != nil {
t.Fatal(err)
} else if port != 80 {
t.Fatalf("Acquire(80) should return 80, not %d", port)
}
port, err := p.RequestPort(ip, "tcp", 0)
if err != nil {
t.Fatal(err)
}
if port <= 0 {
t.Fatalf("Acquire(0) should return a non-zero port")
}
if _, err := p.RequestPort(ip, "tcp", port); err == nil {
t.Fatalf("Acquiring a port already in use should return an error")
}
if newPort, err := p.RequestPort(ip, "tcp", 0); err != nil {
t.Fatal(err)
} else if newPort == port {
t.Fatalf("Acquire(0) allocated the same port twice: %d", port)
}
if _, err := p.RequestPort(ip, "tcp", 80); err == nil {
t.Fatalf("Acquiring a port already in use should return an error")
}
if _, err := p.RequestPort(ip2, "tcp", 80); err != nil {
t.Fatalf("It should be possible to allocate the same port on a different interface")
}
if _, err := p.RequestPort(ip2, "tcp", 80); err == nil {
t.Fatalf("Acquiring a port already in use should return an error")
}
if err := p.ReleasePort(ip, "tcp", 80); err != nil {
t.Fatal(err)
}
if _, err := p.RequestPort(ip, "tcp", 80); err != nil {
t.Fatal(err)
}
port, err = p.RequestPort(ip, "tcp", 0)
if err != nil {
t.Fatal(err)
}
port2, err := p.RequestPort(ip, "tcp", port+1)
if err != nil {
t.Fatal(err)
}
port3, err := p.RequestPort(ip, "tcp", 0)
if err != nil {
t.Fatal(err)
}
if port3 == port2 {
t.Fatal("Requesting a dynamic port should never allocate a used port")
}
}
func TestPortAllocationWithCustomRange(t *testing.T) {
p := Get()
defer resetPortAllocator()
start, end := 8081, 8082
specificPort := 8000
//get an ephemeral port.
port1, err := p.RequestPortInRange(defaultIP, "tcp", 0, 0)
if err != nil {
t.Fatal(err)
}
//request invalid ranges
if _, err := p.RequestPortInRange(defaultIP, "tcp", 0, end); err == nil {
t.Fatalf("Expected error for invalid range %d-%d", 0, end)
}
if _, err := p.RequestPortInRange(defaultIP, "tcp", start, 0); err == nil {
t.Fatalf("Expected error for invalid range %d-%d", 0, end)
}
if _, err := p.RequestPortInRange(defaultIP, "tcp", 8081, 8080); err == nil {
t.Fatalf("Expected error for invalid range %d-%d", 0, end)
}
//request a single port
port, err := p.RequestPortInRange(defaultIP, "tcp", specificPort, specificPort)
if err != nil {
t.Fatal(err)
}
if port != specificPort {
t.Fatalf("Expected port %d, got %d", specificPort, port)
}
//get a port from the range
port2, err := p.RequestPortInRange(defaultIP, "tcp", start, end)
if err != nil {
t.Fatal(err)
}
if port2 < start || port2 > end {
t.Fatalf("Expected a port between %d and %d, got %d", start, end, port2)
}
//get another ephemeral port (should be > port1)
port3, err := p.RequestPortInRange(defaultIP, "tcp", 0, 0)
if err != nil {
t.Fatal(err)
}
if port3 < port1 {
t.Fatalf("Expected new port > %d in the ephemeral range, got %d", port1, port3)
}
//get another (and in this case the only other) port from the range
port4, err := p.RequestPortInRange(defaultIP, "tcp", start, end)
if err != nil {
t.Fatal(err)
}
if port4 < start || port4 > end {
t.Fatalf("Expected a port between %d and %d, got %d", start, end, port4)
}
if port4 == port2 {
t.Fatal("Allocated the same port from a custom range")
}
//request 3rd port from the range of 2
if _, err := p.RequestPortInRange(defaultIP, "tcp", start, end); err != ErrAllPortsAllocated {
t.Fatalf("Expected error %s got %s", ErrAllPortsAllocated, err)
}
}
func TestNoDuplicateBPR(t *testing.T) {
p := Get()
defer resetPortAllocator()
if port, err := p.RequestPort(defaultIP, "tcp", p.Begin); err != nil {
t.Fatal(err)
} else if port != p.Begin {
t.Fatalf("Expected port %d got %d", p.Begin, port)
}
if port, err := p.RequestPort(defaultIP, "tcp", 0); err != nil {
t.Fatal(err)
} else if port == p.Begin {
t.Fatalf("Acquire(0) allocated the same port twice: %d", port)
}
}