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Add gotestyourself dependency. 

Signed-off-by: Daniel Nephin <dnephin@docker.com>
This commit is contained in:
Daniel Nephin 2017-08-14 14:28:08 -04:00
parent 17adcbdada
commit 85f7ed8cfa
6 changed files with 615 additions and 0 deletions
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1
vendor.conf
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@ -22,6 +22,7 @@ github.com/docker/swarmkit 79381d0840be27f8b3f5c667b348a4467d866eeb
github.com/flynn-archive/go-shlex 3f9db97f856818214da2e1057f8ad84803971cff
github.com/gogo/protobuf 7efa791bd276fd4db00867cbd982b552627c24cb
github.com/golang/protobuf 7a211bcf3bce0e3f1d74f9894916e6f116ae83b4
github.com/gotestyourself/gotestyourself v1.0.0
github.com/gorilla/context v1.1
github.com/gorilla/mux v1.1
github.com/inconshreveable/mousetrap 76626ae9c91c4f2a10f34cad8ce83ea42c93bb75

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# Go Test Yourself
A collection of packages compatible with `go test` to support common testing
patterns.
[![GoDoc](https://godoc.org/github.com/gotestyourself/gotestyourself?status.svg)](https://godoc.org/github.com/gotestyourself/gotestyourself)
[![CircleCI](https://circleci.com/gh/gotestyourself/gotestyourself/tree/master.svg?style=shield)](https://circleci.com/gh/gotestyourself/gotestyourself/tree/master)
[![Go Reportcard](https://goreportcard.com/badge/github.com/gotestyourself/gotestyourself)](https://goreportcard.com/report/github.com/gotestyourself/gotestyourself)
## Packages
* [fs](http://godoc.org/github.com/gotestyourself/gotestyourself/fs) -
create test files and directories
* [golden](http://godoc.org/github.com/gotestyourself/gotestyourself/golden) -
compare large multi-line strings
* [testsum](http://godoc.org/github.com/gotestyourself/gotestyourself/testsum) -
a program to summarize `go test` output and test failures
* [icmd](http://godoc.org/github.com/gotestyourself/gotestyourself/icmd) -
execute binaries and test the output
* [skip](http://godoc.org/github.com/gotestyourself/gotestyourself/skip) -
skip tests based on conditions
## Related
* [testify/assert](https://godoc.org/github.com/stretchr/testify/assert) and
[testify/require](https://godoc.org/github.com/stretchr/testify/require) -
assertion libraries with common assertions
* [golang/mock](https://github.com/golang/mock) - generate mocks for interfaces
* [testify/suite](https://godoc.org/github.com/stretchr/testify/suite) -
group test into suites to share common setup/teardown logic

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/*Package golden provides tools for comparing large mutli-line strings.
Golden files are files in the ./testdata/ subdirectory of the package under test.
*/
package golden
import (
"flag"
"fmt"
"io/ioutil"
"path/filepath"
"github.com/pmezard/go-difflib/difflib"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
var flagUpdate = flag.Bool("test.update-golden", false, "update golden file")
// Get returns the golden file content
func Get(t require.TestingT, filename string) []byte {
expected, err := ioutil.ReadFile(Path(filename))
require.NoError(t, err)
return expected
}
// Path returns the full path to a golden file
func Path(filename string) string {
return filepath.Join("testdata", filename)
}
func update(t require.TestingT, filename string, actual []byte) {
if *flagUpdate {
err := ioutil.WriteFile(Path(filename), actual, 0644)
require.NoError(t, err)
}
}
// Assert compares the actual content to the expected content in the golden file.
// If `--update-golden` is set then the actual content is written to the golden
// file.
// Returns whether the assertion was successful (true) or not (false)
func Assert(t require.TestingT, actual string, filename string, msgAndArgs ...interface{}) bool {
expected := Get(t, filename)
update(t, filename, []byte(actual))
if assert.ObjectsAreEqual(expected, []byte(actual)) {
return true
}
diff, err := difflib.GetUnifiedDiffString(difflib.UnifiedDiff{
A: difflib.SplitLines(string(expected)),
B: difflib.SplitLines(actual),
FromFile: "Expected",
ToFile: "Actual",
Context: 3,
})
require.NoError(t, err, msgAndArgs...)
return assert.Fail(t, fmt.Sprintf("Not Equal: \n%s", diff), msgAndArgs...)
}
// AssertBytes compares the actual result to the expected result in the golden
// file. If `--update-golden` is set then the actual content is written to the
// golden file.
// Returns whether the assertion was successful (true) or not (false)
// nolint: lll
func AssertBytes(t require.TestingT, actual []byte, filename string, msgAndArgs ...interface{}) bool {
expected := Get(t, filename)
update(t, filename, actual)
return assert.Equal(t, expected, actual, msgAndArgs...)
}

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/*Package icmd executes binaries and provides convenient assertions for testing the results.
*/
package icmd
import (
"bytes"
"fmt"
"io"
"os/exec"
"path/filepath"
"runtime"
"strings"
"sync"
"time"
)
type testingT interface {
Fatalf(string, ...interface{})
}
const (
// None is a token to inform Result.Assert that the output should be empty
None string = "<NOTHING>"
)
type lockedBuffer struct {
m sync.RWMutex
buf bytes.Buffer
}
func (buf *lockedBuffer) Write(b []byte) (int, error) {
buf.m.Lock()
defer buf.m.Unlock()
return buf.buf.Write(b)
}
func (buf *lockedBuffer) String() string {
buf.m.RLock()
defer buf.m.RUnlock()
return buf.buf.String()
}
// Result stores the result of running a command
type Result struct {
Cmd *exec.Cmd
ExitCode int
Error error
// Timeout is true if the command was killed because it ran for too long
Timeout bool
outBuffer *lockedBuffer
errBuffer *lockedBuffer
}
// Assert compares the Result against the Expected struct, and fails the test if
// any of the expectations are not met.
func (r *Result) Assert(t testingT, exp Expected) *Result {
err := r.Compare(exp)
if err == nil {
return r
}
_, file, line, ok := runtime.Caller(1)
if ok {
t.Fatalf("at %s:%d - %s\n", filepath.Base(file), line, err.Error())
} else {
t.Fatalf("(no file/line info) - %s", err.Error())
}
return nil
}
// Compare returns a formatted error with the command, stdout, stderr, exit
// code, and any failed expectations
// nolint: gocyclo
func (r *Result) Compare(exp Expected) error {
errors := []string{}
add := func(format string, args ...interface{}) {
errors = append(errors, fmt.Sprintf(format, args...))
}
if exp.ExitCode != r.ExitCode {
add("ExitCode was %d expected %d", r.ExitCode, exp.ExitCode)
}
if exp.Timeout != r.Timeout {
if exp.Timeout {
add("Expected command to timeout")
} else {
add("Expected command to finish, but it hit the timeout")
}
}
if !matchOutput(exp.Out, r.Stdout()) {
add("Expected stdout to contain %q", exp.Out)
}
if !matchOutput(exp.Err, r.Stderr()) {
add("Expected stderr to contain %q", exp.Err)
}
switch {
// If a non-zero exit code is expected there is going to be an error.
// Don't require an error message as well as an exit code because the
// error message is going to be "exit status <code> which is not useful
case exp.Error == "" && exp.ExitCode != 0:
case exp.Error == "" && r.Error != nil:
add("Expected no error")
case exp.Error != "" && r.Error == nil:
add("Expected error to contain %q, but there was no error", exp.Error)
case exp.Error != "" && !strings.Contains(r.Error.Error(), exp.Error):
add("Expected error to contain %q", exp.Error)
}
if len(errors) == 0 {
return nil
}
return fmt.Errorf("%s\nFailures:\n%s", r, strings.Join(errors, "\n"))
}
func matchOutput(expected string, actual string) bool {
switch expected {
case None:
return actual == ""
default:
return strings.Contains(actual, expected)
}
}
func (r *Result) String() string {
var timeout string
if r.Timeout {
timeout = " (timeout)"
}
return fmt.Sprintf(`
Command: %s
ExitCode: %d%s
Error: %v
Stdout: %v
Stderr: %v
`,
strings.Join(r.Cmd.Args, " "),
r.ExitCode,
timeout,
r.Error,
r.Stdout(),
r.Stderr())
}
// Expected is the expected output from a Command. This struct is compared to a
// Result struct by Result.Assert().
type Expected struct {
ExitCode int
Timeout bool
Error string
Out string
Err string
}
// Success is the default expected result. A Success result is one with a 0
// ExitCode.
var Success = Expected{}
// Stdout returns the stdout of the process as a string
func (r *Result) Stdout() string {
return r.outBuffer.String()
}
// Stderr returns the stderr of the process as a string
func (r *Result) Stderr() string {
return r.errBuffer.String()
}
// Combined returns the stdout and stderr combined into a single string
func (r *Result) Combined() string {
return r.outBuffer.String() + r.errBuffer.String()
}
// SetExitError sets Error and ExitCode based on Error
func (r *Result) SetExitError(err error) {
if err == nil {
return
}
r.Error = err
r.ExitCode = processExitCode(err)
}
// Cmd contains the arguments and options for a process to run as part of a test
// suite.
type Cmd struct {
Command []string
Timeout time.Duration
Stdin io.Reader
Stdout io.Writer
Dir string
Env []string
}
// Command create a simple Cmd with the specified command and arguments
func Command(command string, args ...string) Cmd {
return Cmd{Command: append([]string{command}, args...)}
}
// RunCmd runs a command and returns a Result
func RunCmd(cmd Cmd, cmdOperators ...func(*Cmd)) *Result {
for _, op := range cmdOperators {
op(&cmd)
}
result := StartCmd(cmd)
if result.Error != nil {
return result
}
return WaitOnCmd(cmd.Timeout, result)
}
// RunCommand parses a command line and runs it, returning a result
func RunCommand(command string, args ...string) *Result {
return RunCmd(Command(command, args...))
}
// StartCmd starts a command, but doesn't wait for it to finish
func StartCmd(cmd Cmd) *Result {
result := buildCmd(cmd)
if result.Error != nil {
return result
}
result.SetExitError(result.Cmd.Start())
return result
}
func buildCmd(cmd Cmd) *Result {
var execCmd *exec.Cmd
switch len(cmd.Command) {
case 1:
execCmd = exec.Command(cmd.Command[0])
default:
execCmd = exec.Command(cmd.Command[0], cmd.Command[1:]...)
}
outBuffer := new(lockedBuffer)
errBuffer := new(lockedBuffer)
execCmd.Stdin = cmd.Stdin
execCmd.Dir = cmd.Dir
execCmd.Env = cmd.Env
if cmd.Stdout != nil {
execCmd.Stdout = io.MultiWriter(outBuffer, cmd.Stdout)
} else {
execCmd.Stdout = outBuffer
}
execCmd.Stderr = errBuffer
return &Result{
Cmd: execCmd,
outBuffer: outBuffer,
errBuffer: errBuffer,
}
}
// WaitOnCmd waits for a command to complete. If timeout is non-nil then
// only wait until the timeout.
func WaitOnCmd(timeout time.Duration, result *Result) *Result {
if timeout == time.Duration(0) {
result.SetExitError(result.Cmd.Wait())
return result
}
done := make(chan error, 1)
// Wait for command to exit in a goroutine
go func() {
done <- result.Cmd.Wait()
}()
select {
case <-time.After(timeout):
killErr := result.Cmd.Process.Kill()
if killErr != nil {
fmt.Printf("failed to kill (pid=%d): %v\n", result.Cmd.Process.Pid, killErr)
}
result.Timeout = true
case err := <-done:
result.SetExitError(err)
}
return result
}

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package icmd
import (
"os/exec"
"syscall"
"github.com/pkg/errors"
)
// GetExitCode returns the ExitStatus of a process from the error returned by
// exec.Run(). If the exit status could not be parsed an error is returned.
func GetExitCode(err error) (int, error) {
if exiterr, ok := err.(*exec.ExitError); ok {
if procExit, ok := exiterr.Sys().(syscall.WaitStatus); ok {
return procExit.ExitStatus(), nil
}
}
return 0, errors.Wrap(err, "failed to get exit code")
}
func processExitCode(err error) (exitCode int) {
if err == nil {
return 0
}
exitCode, exiterr := GetExitCode(err)
if exiterr != nil {
// TODO: Fix this so we check the error's text.
// we've failed to retrieve exit code, so we set it to 127
return 127
}
return exitCode
}