329 lines
7.3 KiB
Go
329 lines
7.3 KiB
Go
package service
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import (
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"context"
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"net/http"
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"net/http/httptest"
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"testing"
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"github.com/containous/traefik/config"
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"github.com/containous/traefik/server/internal"
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"github.com/containous/traefik/testhelpers"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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type MockForwarder struct{}
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func (MockForwarder) ServeHTTP(http.ResponseWriter, *http.Request) {
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panic("implement me")
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}
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func TestGetLoadBalancer(t *testing.T) {
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sm := Manager{}
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testCases := []struct {
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desc string
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serviceName string
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service *config.LoadBalancerService
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fwd http.Handler
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expectError bool
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}{
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{
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desc: "Fails when provided an invalid URL",
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serviceName: "test",
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service: &config.LoadBalancerService{
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Servers: []config.Server{
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{
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URL: ":",
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Weight: 0,
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},
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},
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},
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fwd: &MockForwarder{},
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expectError: true,
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},
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{
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desc: "Succeeds when there are no servers",
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serviceName: "test",
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service: &config.LoadBalancerService{},
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fwd: &MockForwarder{},
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expectError: false,
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},
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{
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desc: "Succeeds when stickiness is set",
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serviceName: "test",
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service: &config.LoadBalancerService{
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Stickiness: &config.Stickiness{},
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},
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fwd: &MockForwarder{},
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expectError: false,
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},
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}
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for _, test := range testCases {
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test := test
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t.Run(test.desc, func(t *testing.T) {
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t.Parallel()
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handler, err := sm.getLoadBalancer(context.Background(), test.serviceName, test.service, test.fwd)
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if test.expectError {
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require.Error(t, err)
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assert.Nil(t, handler)
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} else {
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require.NoError(t, err)
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assert.NotNil(t, handler)
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}
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})
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}
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}
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func TestGetLoadBalancerServiceHandler(t *testing.T) {
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sm := NewManager(nil, http.DefaultTransport)
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server1 := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("X-From", "first")
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}))
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defer server1.Close()
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server2 := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("X-From", "second")
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}))
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defer server2.Close()
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serverPassHost := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("X-From", "passhost")
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assert.Equal(t, "callme", r.Host)
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}))
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defer serverPassHost.Close()
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serverPassHostFalse := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("X-From", "passhostfalse")
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assert.NotEqual(t, "callme", r.Host)
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}))
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defer serverPassHostFalse.Close()
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type ExpectedResult struct {
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StatusCode int
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XFrom string
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}
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testCases := []struct {
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desc string
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serviceName string
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service *config.LoadBalancerService
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responseModifier func(*http.Response) error
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expected []ExpectedResult
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}{
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{
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desc: "Load balances between the two servers",
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serviceName: "test",
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service: &config.LoadBalancerService{
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Servers: []config.Server{
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{
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URL: server1.URL,
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Weight: 50,
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},
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{
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URL: server2.URL,
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Weight: 50,
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},
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},
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Method: "wrr",
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},
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expected: []ExpectedResult{
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{
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StatusCode: http.StatusOK,
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XFrom: "first",
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},
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{
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StatusCode: http.StatusOK,
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XFrom: "second",
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},
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},
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},
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{
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desc: "StatusBadGateway when the server is not reachable",
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serviceName: "test",
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service: &config.LoadBalancerService{
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Servers: []config.Server{
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{
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URL: "http://foo",
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Weight: 1,
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},
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},
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Method: "wrr",
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},
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expected: []ExpectedResult{
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{
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StatusCode: http.StatusBadGateway,
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},
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},
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},
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{
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desc: "ServiceUnavailable when no servers are available",
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serviceName: "test",
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service: &config.LoadBalancerService{
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Servers: []config.Server{},
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Method: "wrr",
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},
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expected: []ExpectedResult{
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{
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StatusCode: http.StatusServiceUnavailable,
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},
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},
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},
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{
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desc: "Always call the same server when stickiness is true",
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serviceName: "test",
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service: &config.LoadBalancerService{
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Stickiness: &config.Stickiness{},
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Servers: []config.Server{
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{
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URL: server1.URL,
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Weight: 1,
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},
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{
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URL: server2.URL,
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Weight: 1,
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},
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},
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Method: "wrr",
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},
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expected: []ExpectedResult{
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{
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StatusCode: http.StatusOK,
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XFrom: "first",
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},
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{
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StatusCode: http.StatusOK,
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XFrom: "first",
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},
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},
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},
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{
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desc: "PassHost passes the host instead of the IP",
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serviceName: "test",
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service: &config.LoadBalancerService{
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Stickiness: &config.Stickiness{},
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PassHostHeader: true,
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Servers: []config.Server{
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{
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URL: serverPassHost.URL,
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Weight: 1,
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},
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},
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Method: "wrr",
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},
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expected: []ExpectedResult{
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{
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StatusCode: http.StatusOK,
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XFrom: "passhost",
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},
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},
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},
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{
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desc: "PassHost doesn't passe the host instead of the IP",
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serviceName: "test",
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service: &config.LoadBalancerService{
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Stickiness: &config.Stickiness{},
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Servers: []config.Server{
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{
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URL: serverPassHostFalse.URL,
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Weight: 1,
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},
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},
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Method: "wrr",
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},
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expected: []ExpectedResult{
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{
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StatusCode: http.StatusOK,
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XFrom: "passhostfalse",
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},
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},
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},
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}
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for _, test := range testCases {
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test := test
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t.Run(test.desc, func(t *testing.T) {
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handler, err := sm.getLoadBalancerServiceHandler(context.Background(), test.serviceName, test.service, test.responseModifier)
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assert.NoError(t, err)
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assert.NotNil(t, handler)
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req := testhelpers.MustNewRequest(http.MethodGet, "http://callme", nil)
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for _, expected := range test.expected {
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recorder := httptest.NewRecorder()
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handler.ServeHTTP(recorder, req)
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assert.Equal(t, expected.StatusCode, recorder.Code)
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assert.Equal(t, expected.XFrom, recorder.Header().Get("X-From"))
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if len(recorder.Header().Get("Set-Cookie")) > 0 {
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req.Header.Set("Cookie", recorder.Header().Get("Set-Cookie"))
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}
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}
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})
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}
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}
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func TestManager_Build(t *testing.T) {
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testCases := []struct {
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desc string
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serviceName string
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configs map[string]*config.Service
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providerName string
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}{
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{
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desc: "Simple service name",
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serviceName: "serviceName",
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configs: map[string]*config.Service{
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"serviceName": {
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LoadBalancer: &config.LoadBalancerService{Method: "wrr"},
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},
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},
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},
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{
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desc: "Service name with provider",
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serviceName: "provider-1.serviceName",
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configs: map[string]*config.Service{
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"provider-1.serviceName": {
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LoadBalancer: &config.LoadBalancerService{Method: "wrr"},
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},
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},
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},
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{
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desc: "Service name with provider in context",
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serviceName: "serviceName",
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configs: map[string]*config.Service{
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"provider-1.serviceName": {
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LoadBalancer: &config.LoadBalancerService{Method: "wrr"},
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},
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},
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providerName: "provider-1",
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},
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}
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for _, test := range testCases {
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test := test
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t.Run(test.desc, func(t *testing.T) {
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t.Parallel()
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manager := NewManager(test.configs, http.DefaultTransport)
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ctx := context.Background()
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if len(test.providerName) > 0 {
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ctx = internal.AddProviderInContext(ctx, test.providerName+".foobar")
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}
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_, err := manager.Build(ctx, test.serviceName, nil)
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require.NoError(t, err)
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})
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}
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}
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// FIXME Add healthcheck tests
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