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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
// A helper for testing commands
// Author: bratseth
package cmd
import (
"bytes"
"crypto/tls"
"io"
"io/ioutil"
"net/http"
"os"
"path/filepath"
"strconv"
"testing"
"time"
"github.com/spf13/pflag"
"github.com/spf13/viper"
"github.com/stretchr/testify/require"
"github.com/vespa-engine/vespa/client/go/util"
)
type command struct {
homeDir string
cacheDir string
stdin io.ReadWriter
args []string
moreArgs []string
env map[string]string
failTestOnError bool
}
func resetFlag(f *pflag.Flag) {
switch v := f.Value.(type) {
case pflag.SliceValue:
_ = v.Replace([]string{})
default:
switch v.Type() {
case "bool", "string", "int":
_ = v.Set(f.DefValue)
}
}
}
func setEnv(env map[string]string) map[string]string {
originalEnv := map[string]string{}
for k, v := range env {
value, ok := os.LookupEnv(k)
if ok {
originalEnv[k] = value
}
os.Setenv(k, v)
}
return originalEnv
}
func resetEnv(env map[string]string, original map[string]string) {
for k, _ := range env {
if v, ok := original[k]; ok {
os.Setenv(k, v)
} else {
os.Unsetenv(k)
}
}
}
func execute(cmd command, t *testing.T, client *mockHttpClient) (string, string) {
if client != nil {
util.ActiveHttpClient = client
}
// Set Vespa CLI directories. Use a separate one per test if none is specified
if cmd.homeDir == "" {
cmd.homeDir = filepath.Join(t.TempDir(), ".vespa")
viper.Reset()
}
if cmd.cacheDir == "" {
cmd.cacheDir = filepath.Join(t.TempDir(), ".cache", "vespa")
}
env := map[string]string{}
for k, v := range cmd.env {
env[k] = v
}
env["VESPA_CLI_HOME"] = cmd.homeDir
env["VESPA_CLI_CACHE_DIR"] = cmd.cacheDir
originalEnv := setEnv(env)
defer resetEnv(env, originalEnv)
// Reset viper at end of test to ensure vespa config set does not leak between tests
t.Cleanup(viper.Reset)
// Reset flags to their default value - persistent flags in Cobra persists over tests
// TODO: Due to the bad design of viper, the only proper fix is to get rid of global state by moving each command to
// their own sub-package
rootCmd.Flags().VisitAll(resetFlag)
queryCmd.Flags().VisitAll(resetFlag)
documentCmd.Flags().VisitAll(resetFlag)
logCmd.Flags().VisitAll(resetFlag)
// Capture stdout and execute command
var capturedOut bytes.Buffer
var capturedErr bytes.Buffer
stdout = &capturedOut
stderr = &capturedErr
if cmd.stdin != nil {
stdin = cmd.stdin
} else {
stdin = os.Stdin
}
// Execute command and return output
rootCmd.SetArgs(append(cmd.args, cmd.moreArgs...))
err := Execute()
if cmd.failTestOnError {
require.Nil(t, err)
}
return capturedOut.String(), capturedErr.String()
}
func executeCommand(t *testing.T, client *mockHttpClient, args []string, moreArgs []string) string {
out, _ := execute(command{args: args, moreArgs: moreArgs}, t, client)
return out
}
type mockHttpClient struct {
// The responses to return for future requests. Once a response is consumed, it's removed from this array
nextResponses []mockResponse
// A recording of the last HTTP request made through this
lastRequest *http.Request
// All requests made through this
requests []*http.Request
}
type mockResponse struct {
status int
body []byte
}
func (c *mockHttpClient) NextStatus(status int) { c.NextResponseBytes(status, nil) }
func (c *mockHttpClient) NextResponse(status int, body string) {
c.NextResponseBytes(status, []byte(body))
}
func (c *mockHttpClient) NextResponseBytes(status int, body []byte) {
c.nextResponses = append(c.nextResponses, mockResponse{status: status, body: body})
}
func (c *mockHttpClient) Do(request *http.Request, timeout time.Duration) (*http.Response, error) {
response := mockResponse{status: 200}
if len(c.nextResponses) > 0 {
response = c.nextResponses[0]
c.nextResponses = c.nextResponses[1:]
}
c.lastRequest = request
c.requests = append(c.requests, request)
return &http.Response{
Status: "Status " + strconv.Itoa(response.status),
StatusCode: response.status,
Body: ioutil.NopCloser(bytes.NewBuffer(response.body)),
Header: make(http.Header),
},
nil
}
func (c *mockHttpClient) UseCertificate(certificates []tls.Certificate) {}
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