prometheus/discovery/dockerswarm/mock_test.go

120 lines
3.2 KiB
Go
Raw Normal View History

// Copyright 2020 The Prometheus 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 dockerswarm
import (
"crypto/sha1"
"encoding/base64"
"io/ioutil"
"net/http"
"net/http/httptest"
"path/filepath"
"strings"
"testing"
"github.com/stretchr/testify/require"
"gopkg.in/yaml.v2"
"github.com/prometheus/prometheus/util/strutil"
)
// SDMock is the interface for the DigitalOcean mock
type SDMock struct {
t *testing.T
Server *httptest.Server
Mux *http.ServeMux
directory string
calls map[string]int
}
// NewSDMock returns a new SDMock.
func NewSDMock(t *testing.T, directory string) *SDMock {
return &SDMock{
t: t,
directory: directory,
calls: make(map[string]int),
}
}
// Endpoint returns the URI to the mock server
func (m *SDMock) Endpoint() string {
return m.Server.URL + "/"
}
// Setup creates the mock server
func (m *SDMock) Setup() {
m.Mux = http.NewServeMux()
m.Server = httptest.NewServer(m.Mux)
m.t.Cleanup(m.Server.Close)
m.SetupHandlers()
}
// HandleNodesList mocks nodes list.
func (m *SDMock) SetupHandlers() {
headers := make(map[string]string)
rawHeaders, err := ioutil.ReadFile(filepath.Join("testdata", m.directory, "headers.yml"))
require.NoError(m.t, err)
yaml.Unmarshal(rawHeaders, &headers)
prefix := "/"
if v, ok := headers["Api-Version"]; ok {
prefix += "v" + v + "/"
}
for _, path := range []string{"_ping", "networks/", "services/", "nodes/", "nodes", "services", "tasks"} {
p := path
handler := prefix + p
if p == "_ping" {
handler = "/" + p
}
m.Mux.HandleFunc(handler, func(w http.ResponseWriter, r *http.Request) {
// The discovery should only call each API endpoint once.
m.calls[r.RequestURI]++
if m.calls[r.RequestURI] != 1 {
w.WriteHeader(http.StatusTooManyRequests)
return
}
for k, v := range headers {
w.Header().Add(k, v)
}
parts := strings.Split(r.RequestURI, "/")
var f string
if strings.HasSuffix(p, "/") {
f = filepath.Join(p[:len(p)-1], strutil.SanitizeLabelName(parts[len(parts)-1]))
} else {
query := strings.Split(parts[len(parts)-1], "?")
f = query[0] + ".json"
if len(query) == 2 {
h := sha1.New()
h.Write([]byte(query[1]))
// Avoing long filenames for Windows.
f += "__" + base64.URLEncoding.EncodeToString(h.Sum(nil))[:10]
}
}
if response, err := ioutil.ReadFile(filepath.Join("testdata", m.directory, f+".json")); err == nil {
w.Header().Add("content-type", "application/json")
w.WriteHeader(http.StatusOK)
w.Write(response)
return
}
if response, err := ioutil.ReadFile(filepath.Join("testdata", m.directory, f)); err == nil {
w.WriteHeader(http.StatusOK)
w.Write(response)
return
}
w.WriteHeader(http.StatusInternalServerError)
})
}
}