traefik/pkg/provider/http/http_test.go

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package http
import (
"context"
"fmt"
"net/http"
"net/http/httptest"
"testing"
"time"
"github.com/containous/traefik/v2/pkg/config/dynamic"
"github.com/containous/traefik/v2/pkg/safe"
"github.com/containous/traefik/v2/pkg/tls"
"github.com/containous/traefik/v2/pkg/types"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestProvider_Init(t *testing.T) {
tests := []struct {
desc string
endpoint string
pollInterval types.Duration
expErr bool
}{
{
desc: "should return an error if no endpoint is configured",
expErr: true,
},
{
desc: "should return an error if pollInterval is equal to 0",
endpoint: "http://localhost:8080",
expErr: true,
},
{
desc: "should not return an error",
endpoint: "http://localhost:8080",
pollInterval: types.Duration(time.Second),
expErr: false,
},
}
for _, test := range tests {
t.Run(test.desc, func(t *testing.T) {
provider := &Provider{
Endpoint: test.endpoint,
PollInterval: test.pollInterval,
}
err := provider.Init()
if test.expErr {
require.Error(t, err)
return
}
require.NoError(t, err)
})
}
}
func TestProvider_SetDefaults(t *testing.T) {
provider := &Provider{}
provider.SetDefaults()
assert.Equal(t, provider.PollInterval, types.Duration(5*time.Second))
assert.Equal(t, provider.PollTimeout, types.Duration(5*time.Second))
}
func TestProvider_fetchConfigurationData(t *testing.T) {
tests := []struct {
desc string
handler func(rw http.ResponseWriter, req *http.Request)
expData []byte
expErr bool
}{
{
desc: "should return the fetched configuration data",
expData: []byte("{}"),
handler: func(rw http.ResponseWriter, req *http.Request) {
rw.WriteHeader(http.StatusOK)
_, _ = fmt.Fprintf(rw, "{}")
},
},
{
desc: "should return an error if endpoint does not return an OK status code",
expErr: true,
handler: func(rw http.ResponseWriter, req *http.Request) {
rw.WriteHeader(http.StatusNoContent)
},
},
}
for _, test := range tests {
t.Run(test.desc, func(t *testing.T) {
server := httptest.NewServer(http.HandlerFunc(test.handler))
defer server.Close()
provider := Provider{
Endpoint: server.URL,
PollInterval: types.Duration(1 * time.Second),
PollTimeout: types.Duration(1 * time.Second),
}
err := provider.Init()
require.NoError(t, err)
configData, err := provider.fetchConfigurationData()
if test.expErr {
require.Error(t, err)
return
}
require.NoError(t, err)
assert.Equal(t, test.expData, configData)
})
}
}
func TestProvider_decodeConfiguration(t *testing.T) {
tests := []struct {
desc string
configData []byte
expConfig *dynamic.Configuration
expErr bool
}{
{
desc: "should return an error if the configuration data cannot be decoded",
expErr: true,
configData: []byte("{"),
},
{
desc: "should return the decoded dynamic configuration",
configData: []byte("{\"tcp\":{\"routers\":{\"foo\":{}}}}"),
expConfig: &dynamic.Configuration{
HTTP: &dynamic.HTTPConfiguration{
Routers: make(map[string]*dynamic.Router),
Middlewares: make(map[string]*dynamic.Middleware),
Services: make(map[string]*dynamic.Service),
},
TCP: &dynamic.TCPConfiguration{
Routers: map[string]*dynamic.TCPRouter{
"foo": {},
},
Services: make(map[string]*dynamic.TCPService),
},
TLS: &dynamic.TLSConfiguration{
Stores: make(map[string]tls.Store),
Options: make(map[string]tls.Options),
},
UDP: &dynamic.UDPConfiguration{
Routers: make(map[string]*dynamic.UDPRouter),
Services: make(map[string]*dynamic.UDPService),
},
},
},
}
for _, test := range tests {
t.Run(test.desc, func(t *testing.T) {
configuration, err := decodeConfiguration(test.configData)
if test.expErr {
require.Error(t, err)
return
}
require.NoError(t, err)
assert.Equal(t, test.expConfig, configuration)
})
}
}
func TestProvider_Provide(t *testing.T) {
handler := func(rw http.ResponseWriter, req *http.Request) {
rw.WriteHeader(http.StatusOK)
_, _ = fmt.Fprintf(rw, "{}")
}
server := httptest.NewServer(http.HandlerFunc(handler))
defer server.Close()
provider := Provider{
Endpoint: server.URL,
PollTimeout: types.Duration(1 * time.Second),
PollInterval: types.Duration(100 * time.Millisecond),
}
err := provider.Init()
require.NoError(t, err)
configurationChan := make(chan dynamic.Message)
expConfiguration := &dynamic.Configuration{
HTTP: &dynamic.HTTPConfiguration{
Routers: make(map[string]*dynamic.Router),
Middlewares: make(map[string]*dynamic.Middleware),
Services: make(map[string]*dynamic.Service),
},
TCP: &dynamic.TCPConfiguration{
Routers: make(map[string]*dynamic.TCPRouter),
Services: make(map[string]*dynamic.TCPService),
},
TLS: &dynamic.TLSConfiguration{
Stores: make(map[string]tls.Store),
Options: make(map[string]tls.Options),
},
UDP: &dynamic.UDPConfiguration{
Routers: make(map[string]*dynamic.UDPRouter),
Services: make(map[string]*dynamic.UDPService),
},
}
err = provider.Provide(configurationChan, safe.NewPool(context.Background()))
require.NoError(t, err)
timeout := time.After(time.Second)
select {
case configuration := <-configurationChan:
assert.NotNil(t, configuration.Configuration)
assert.Equal(t, expConfiguration, configuration.Configuration)
case <-timeout:
t.Errorf("timeout while waiting for config")
}
}
func TestProvider_ProvideConfigurationOnlyOnceIfUnchanged(t *testing.T) {
handler := func(rw http.ResponseWriter, req *http.Request) {
rw.WriteHeader(http.StatusOK)
_, _ = fmt.Fprintf(rw, "{}")
}
server := httptest.NewServer(http.HandlerFunc(handler))
defer server.Close()
provider := Provider{
Endpoint: server.URL + "/endpoint",
PollTimeout: types.Duration(1 * time.Second),
PollInterval: types.Duration(100 * time.Millisecond),
}
err := provider.Init()
require.NoError(t, err)
configurationChan := make(chan dynamic.Message, 10)
err = provider.Provide(configurationChan, safe.NewPool(context.Background()))
require.NoError(t, err)
time.Sleep(time.Second)
assert.Equal(t, 1, len(configurationChan))
}