/*
Copyright 2017 The Kubernetes Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package testing

import (
	"net"
	"testing"

	utilipvs "k8s.io/kubernetes/pkg/util/ipvs"
)

func TestVirtualServer(t *testing.T) {
	// Initialize
	fake := NewFake()
	// Add a virtual server
	vs1 := &utilipvs.VirtualServer{
		Address:  net.ParseIP("1.2.3.4"),
		Port:     uint16(80),
		Protocol: string("TCP"),
		Flags:    utilipvs.FlagHashed,
	}
	err := fake.AddVirtualServer(vs1)
	if err != nil {
		t.Errorf("Fail to add virutal server, error: %v", err)
	}
	// Get a specific virtual server
	got1, err := fake.GetVirtualServer(vs1)
	if err != nil {
		t.Errorf("Fail to get virutal server, error: %v", err)
	}
	if !vs1.Equal(got1) {
		t.Errorf("Expect virtual server: %v, got: %v", vs1, got1)
	}
	// Update virtual server
	vs12 := &utilipvs.VirtualServer{
		Address:  net.ParseIP("1.2.3.4"),
		Port:     uint16(80),
		Protocol: string("TCP"),
		Flags:    utilipvs.FlagPersistent,
	}
	err = fake.UpdateVirtualServer(vs12)
	if err != nil {
		t.Errorf("Fail to update virutal server, error: %v", err)
	}
	// Check the updated virtual server
	got12, err := fake.GetVirtualServer(vs1)
	if !got12.Equal(vs12) {
		t.Errorf("Expect virutal server: %v, got: %v", vs12, got12)
	}
	// Add another virtual server
	vs2 := &utilipvs.VirtualServer{
		Address:  net.ParseIP("10::40"),
		Port:     uint16(8080),
		Protocol: string("UDP"),
	}
	err = fake.AddVirtualServer(vs2)
	if err != nil {
		t.Errorf("Unexpected error when add virutal server, error: %v", err)
	}
	// List all virtual servers
	list, err := fake.GetVirtualServers()
	if err != nil {
		t.Errorf("Fail to list virutal servers, error: %v", err)
	}
	if len(list) != 2 {
		t.Errorf("Expect 2 virutal servers, got: %d", len(list))
	}
	// Delete a virtual server
	err = fake.DeleteVirtualServer(vs1)
	if err != nil {
		t.Errorf("Fail to delete virutal server: %v, error: %v", vs1, err)
	}
	// Check the deleted virtual server no longer exists
	got, _ := fake.GetVirtualServer(vs1)
	if got != nil {
		t.Errorf("Expect nil, got: %v", got)
	}
	// Flush all virtual servers
	err = fake.Flush()
	if err != nil {
		t.Errorf("Fail to flush virutal servers, error: %v", err)
	}
	// List all virtual servers
	list, err = fake.GetVirtualServers()
	if err != nil {
		t.Errorf("Fail to list virutal servers, error: %v", err)
	}
	if len(list) != 0 {
		t.Errorf("Expect 0 virutal servers, got: %d", len(list))
	}
}

func TestRealServer(t *testing.T) {
	// Initialize
	fake := NewFake()
	// Add a virtual server
	vs := &utilipvs.VirtualServer{
		Address:  net.ParseIP("10.20.30.40"),
		Port:     uint16(80),
		Protocol: string("TCP"),
	}
	err := fake.AddVirtualServer(vs)
	if err != nil {
		t.Errorf("Fail to add virutal server, error: %v", err)
	}
	// Add a real server to the virtual server
	rs1 := &utilipvs.RealServer{
		Address: net.ParseIP("172.16.2.1"),
		Port:    uint16(8080),
		Weight:  1,
	}
	err = fake.AddRealServer(vs, rs1)
	if err != nil {
		t.Errorf("Fail to add real server, error: %v", err)
	}
	// Add another real server to the virtual server
	rs2 := &utilipvs.RealServer{
		Address: net.ParseIP("172.16.3.2"),
		Port:    uint16(8080),
		Weight:  2,
	}
	err = fake.AddRealServer(vs, rs2)
	if err != nil {
		t.Errorf("Fail to add real server, error: %v", err)
	}
	// List all real servers of the virtual server
	list, err := fake.GetRealServers(vs)
	if err != nil {
		t.Errorf("Fail to get real servers of the virtual server, error: %v", err)
	}
	if len(list) != 2 {
		t.Errorf("Expect 2 virutal servers, got: %d", len(list))
	}
	// Delete a real server of the virtual server
	err = fake.DeleteRealServer(vs, rs2)
	list, err = fake.GetRealServers(vs)
	if err != nil {
		t.Errorf("Fail to get real servers of the virtual server, error: %v", err)
	}
	if len(list) != 1 {
		t.Errorf("Expect 1 real server, got: %d", len(list))
	}
	// Delete the virtual server
	err = fake.DeleteVirtualServer(vs)
	if err != nil {
		t.Errorf("Fail to delete virtual server, error: %v", err)
	}
	_, err = fake.GetRealServers(vs)
	if err == nil {
		t.Errorf("Expect error, got nil")
	}
}