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// Copyright 2015 Matthew Holt and The Caddy 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 reverseproxy
// TODO: finish migrating these
// import (
// "net/http"
// "net/http/httptest"
// "os"
// "testing"
// )
// var workableServer *httptest.Server
// func TestMain(m *testing.M) {
// workableServer = httptest.NewServer(http.HandlerFunc(
// func(w http.ResponseWriter, r *http.Request) {
// // do nothing
// }))
// r := m.Run()
// workableServer.Close()
// os.Exit(r)
// }
// type customPolicy struct{}
// func (customPolicy) Select(pool HostPool, _ *http.Request) Host {
// return pool[0]
// }
// func testPool() HostPool {
// pool := []*UpstreamHost{
// {
// Name: workableServer.URL, // this should resolve (healthcheck test)
// },
// {
// Name: "http://localhost:99998", // this shouldn't
// },
// {
// Name: "http://C",
// },
// }
// return HostPool(pool)
// }
// func TestRoundRobinPolicy(t *testing.T) {
// pool := testPool()
// rrPolicy := &RoundRobin{}
// request, _ := http.NewRequest("GET", "/", nil)
// h := rrPolicy.Select(pool, request)
// // First selected host is 1, because counter starts at 0
// // and increments before host is selected
// if h != pool[1] {
// t.Error("Expected first round robin host to be second host in the pool.")
// }
// h = rrPolicy.Select(pool, request)
// if h != pool[2] {
// t.Error("Expected second round robin host to be third host in the pool.")
// }
// h = rrPolicy.Select(pool, request)
// if h != pool[0] {
// t.Error("Expected third round robin host to be first host in the pool.")
// }
// // mark host as down
// pool[1].Unhealthy = 1
// h = rrPolicy.Select(pool, request)
// if h != pool[2] {
// t.Error("Expected to skip down host.")
// }
// // mark host as up
// pool[1].Unhealthy = 0
// h = rrPolicy.Select(pool, request)
// if h == pool[2] {
// t.Error("Expected to balance evenly among healthy hosts")
// }
// // mark host as full
// pool[1].Conns = 1
// pool[1].MaxConns = 1
// h = rrPolicy.Select(pool, request)
// if h != pool[2] {
// t.Error("Expected to skip full host.")
// }
// }
// func TestLeastConnPolicy(t *testing.T) {
// pool := testPool()
// lcPolicy := &LeastConn{}
// request, _ := http.NewRequest("GET", "/", nil)
// pool[0].Conns = 10
// pool[1].Conns = 10
// h := lcPolicy.Select(pool, request)
// if h != pool[2] {
// t.Error("Expected least connection host to be third host.")
// }
// pool[2].Conns = 100
// h = lcPolicy.Select(pool, request)
// if h != pool[0] && h != pool[1] {
// t.Error("Expected least connection host to be first or second host.")
// }
// }
// func TestCustomPolicy(t *testing.T) {
// pool := testPool()
// customPolicy := &customPolicy{}
// request, _ := http.NewRequest("GET", "/", nil)
// h := customPolicy.Select(pool, request)
// if h != pool[0] {
// t.Error("Expected custom policy host to be the first host.")
// }
// }
// func TestIPHashPolicy(t *testing.T) {
// pool := testPool()
// ipHash := &IPHash{}
// request, _ := http.NewRequest("GET", "/", nil)
// // We should be able to predict where every request is routed.
// request.RemoteAddr = "172.0.0.1:80"
// h := ipHash.Select(pool, request)
// if h != pool[1] {
// t.Error("Expected ip hash policy host to be the second host.")
// }
// request.RemoteAddr = "172.0.0.2:80"
// h = ipHash.Select(pool, request)
// if h != pool[1] {
// t.Error("Expected ip hash policy host to be the second host.")
// }
// request.RemoteAddr = "172.0.0.3:80"
// h = ipHash.Select(pool, request)
// if h != pool[2] {
// t.Error("Expected ip hash policy host to be the third host.")
// }
// request.RemoteAddr = "172.0.0.4:80"
// h = ipHash.Select(pool, request)
// if h != pool[1] {
// t.Error("Expected ip hash policy host to be the second host.")
// }
// // we should get the same results without a port
// request.RemoteAddr = "172.0.0.1"
// h = ipHash.Select(pool, request)
// if h != pool[1] {
// t.Error("Expected ip hash policy host to be the second host.")
// }
// request.RemoteAddr = "172.0.0.2"
// h = ipHash.Select(pool, request)
// if h != pool[1] {
// t.Error("Expected ip hash policy host to be the second host.")
// }
// request.RemoteAddr = "172.0.0.3"
// h = ipHash.Select(pool, request)
// if h != pool[2] {
// t.Error("Expected ip hash policy host to be the third host.")
// }
// request.RemoteAddr = "172.0.0.4"
// h = ipHash.Select(pool, request)
// if h != pool[1] {
// t.Error("Expected ip hash policy host to be the second host.")
// }
// // we should get a healthy host if the original host is unhealthy and a
// // healthy host is available
// request.RemoteAddr = "172.0.0.1"
// pool[1].Unhealthy = 1
// h = ipHash.Select(pool, request)
// if h != pool[2] {
// t.Error("Expected ip hash policy host to be the third host.")
// }
// request.RemoteAddr = "172.0.0.2"
// h = ipHash.Select(pool, request)
// if h != pool[2] {
// t.Error("Expected ip hash policy host to be the third host.")
// }
// pool[1].Unhealthy = 0
// request.RemoteAddr = "172.0.0.3"
// pool[2].Unhealthy = 1
// h = ipHash.Select(pool, request)
// if h != pool[0] {
// t.Error("Expected ip hash policy host to be the first host.")
// }
// request.RemoteAddr = "172.0.0.4"
// h = ipHash.Select(pool, request)
// if h != pool[1] {
// t.Error("Expected ip hash policy host to be the second host.")
// }
// // We should be able to resize the host pool and still be able to predict
// // where a request will be routed with the same IP's used above
// pool = []*UpstreamHost{
// {
// Name: workableServer.URL, // this should resolve (healthcheck test)
// },
// {
// Name: "http://localhost:99998", // this shouldn't
// },
// }
// pool = HostPool(pool)
// request.RemoteAddr = "172.0.0.1:80"
// h = ipHash.Select(pool, request)
// if h != pool[0] {
// t.Error("Expected ip hash policy host to be the first host.")
// }
// request.RemoteAddr = "172.0.0.2:80"
// h = ipHash.Select(pool, request)
// if h != pool[1] {
// t.Error("Expected ip hash policy host to be the second host.")
// }
// request.RemoteAddr = "172.0.0.3:80"
// h = ipHash.Select(pool, request)
// if h != pool[0] {
// t.Error("Expected ip hash policy host to be the first host.")
// }
// request.RemoteAddr = "172.0.0.4:80"
// h = ipHash.Select(pool, request)
// if h != pool[1] {
// t.Error("Expected ip hash policy host to be the second host.")
// }
// // We should get nil when there are no healthy hosts
// pool[0].Unhealthy = 1
// pool[1].Unhealthy = 1
// h = ipHash.Select(pool, request)
// if h != nil {
// t.Error("Expected ip hash policy host to be nil.")
// }
// }
// func TestFirstPolicy(t *testing.T) {
// pool := testPool()
// firstPolicy := &First{}
// req := httptest.NewRequest(http.MethodGet, "/", nil)
// h := firstPolicy.Select(pool, req)
// if h != pool[0] {
// t.Error("Expected first policy host to be the first host.")
// }
// pool[0].Unhealthy = 1
// h = firstPolicy.Select(pool, req)
// if h != pool[1] {
// t.Error("Expected first policy host to be the second host.")
// }
// }
// func TestUriPolicy(t *testing.T) {
// pool := testPool()
// uriPolicy := &URIHash{}
// request := httptest.NewRequest(http.MethodGet, "/test", nil)
// h := uriPolicy.Select(pool, request)
// if h != pool[0] {
// t.Error("Expected uri policy host to be the first host.")
// }
// pool[0].Unhealthy = 1
// h = uriPolicy.Select(pool, request)
// if h != pool[1] {
// t.Error("Expected uri policy host to be the first host.")
// }
// request = httptest.NewRequest(http.MethodGet, "/test_2", nil)
// h = uriPolicy.Select(pool, request)
// if h != pool[1] {
// t.Error("Expected uri policy host to be the second host.")
// }
// // We should be able to resize the host pool and still be able to predict
// // where a request will be routed with the same URI's used above
// pool = []*UpstreamHost{
// {
// Name: workableServer.URL, // this should resolve (healthcheck test)
// },
// {
// Name: "http://localhost:99998", // this shouldn't
// },
// }
// request = httptest.NewRequest(http.MethodGet, "/test", nil)
// h = uriPolicy.Select(pool, request)
// if h != pool[0] {
// t.Error("Expected uri policy host to be the first host.")
// }
// pool[0].Unhealthy = 1
// h = uriPolicy.Select(pool, request)
// if h != pool[1] {
// t.Error("Expected uri policy host to be the first host.")
// }
// request = httptest.NewRequest(http.MethodGet, "/test_2", nil)
// h = uriPolicy.Select(pool, request)
// if h != pool[1] {
// t.Error("Expected uri policy host to be the second host.")
// }
// pool[0].Unhealthy = 1
// pool[1].Unhealthy = 1
// h = uriPolicy.Select(pool, request)
// if h != nil {
// t.Error("Expected uri policy policy host to be nil.")
// }
// }
// func TestHeaderPolicy(t *testing.T) {
// pool := testPool()
// tests := []struct {
// Name string
// Policy *Header
// RequestHeaderName string
// RequestHeaderValue string
// NilHost bool
// HostIndex int
// }{
// {"empty config", &Header{""}, "", "", true, 0},
// {"empty config+header+value", &Header{""}, "Affinity", "somevalue", true, 0},
// {"empty config+header", &Header{""}, "Affinity", "", true, 0},
// {"no header(fallback to roundrobin)", &Header{"Affinity"}, "", "", false, 1},
// {"no header(fallback to roundrobin)", &Header{"Affinity"}, "", "", false, 2},
// {"no header(fallback to roundrobin)", &Header{"Affinity"}, "", "", false, 0},
// {"hash route to host", &Header{"Affinity"}, "Affinity", "somevalue", false, 1},
// {"hash route to host", &Header{"Affinity"}, "Affinity", "somevalue2", false, 0},
// {"hash route to host", &Header{"Affinity"}, "Affinity", "somevalue3", false, 2},
// {"hash route with empty value", &Header{"Affinity"}, "Affinity", "", false, 1},
// }
// for idx, test := range tests {
// request, _ := http.NewRequest("GET", "/", nil)
// if test.RequestHeaderName != "" {
// request.Header.Add(test.RequestHeaderName, test.RequestHeaderValue)
// }
// host := test.Policy.Select(pool, request)
// if test.NilHost && host != nil {
// t.Errorf("%d: Expected host to be nil", idx)
// }
// if !test.NilHost && host == nil {
// t.Errorf("%d: Did not expect host to be nil", idx)
// }
// if !test.NilHost && host != pool[test.HostIndex] {
// t.Errorf("%d: Expected Header policy to be host %d", idx, test.HostIndex)
// }
// }
// }
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