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1218 lines (1041 loc) · 27.2 KB
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/*
* Copyright (c) 2021-present Fabien Potencier <fabien@symfony.com>
*
* This file is part of Symfony CLI project
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package console
import (
"bytes"
"errors"
"flag"
"fmt"
"io"
"log"
"os"
"reflect"
"strings"
"testing"
"github.com/symfony-cli/terminal"
. "gopkg.in/check.v1"
)
type ApplicationSuite struct{}
var _ = Suite(&ApplicationSuite{})
func TestApplication(t *testing.T) { TestingT(t) }
var (
stdin = bytes.NewBuffer(nil)
stdout = bytes.NewBuffer(nil)
stderr = bytes.NewBuffer(nil)
)
func init() {
terminal.Stdin.SetReader(stdin)
terminal.Stdout = terminal.NewBufferedConsoleOutput(stdout, stderr)
terminal.Stderr = terminal.Stdout.Stderr
}
func resetOutputsInput() {
stdin.Reset()
stdout.Reset()
stderr.Reset()
}
var (
lastExitCode = 0
fakeOsExiter = func(rc int) {
lastExitCode = rc
}
)
func init() {
OsExiter = fakeOsExiter
terminal.Stdout = terminal.NewBufferedConsoleOutput(io.Discard, io.Discard)
terminal.Stderr = terminal.Stdout.Stderr
}
type opCounts struct {
Total, Before, Action, After int
}
func ExampleApplication_Run() {
// set args for examples sake
os.Args = []string{"greet", "--name", "Jeremy"}
app := &Application{
Writer: os.Stdout,
ErrWriter: os.Stderr,
Name: "greet",
Flags: []Flag{
&StringFlag{Name: "name", DefaultValue: "bob", Usage: "a name to say"},
},
Action: func(c *Context) error {
fmt.Printf("Hello %v\n", c.String("name"))
return nil
},
}
if err := app.Run(os.Args); err != nil {
log.Fatal(err)
}
// Output:
// Hello Jeremy
}
func ExampleApplication_Run_quiet() {
// set args for examples sake
os.Args = []string{"greet", "-q", "--name", "Jeremy"}
app := &Application{
Writer: os.Stdout,
ErrWriter: os.Stdout,
Name: "greet",
Flags: []Flag{
&StringFlag{Name: "name", DefaultValue: "bob", Usage: "a name to say"},
},
Action: func(c *Context) error {
fmt.Fprintf(c.App.Writer, "Hello %v\n", c.String("name"))
fmt.Fprintf(c.App.ErrWriter, "Byebye %v\n", c.String("name"))
return nil
},
}
if err := app.Run(os.Args); err != nil {
log.Fatal(err)
}
// Output:
}
func ExampleApplication_Run_quietDisabled() {
terminal.DefaultStdout = terminal.NewBufferedConsoleOutput(os.Stdout, os.Stdout)
// set args for examples sake
os.Args = []string{"greet", "--quiet=false", "--name", "Jeremy"}
app := &Application{
Writer: os.Stdout,
ErrWriter: os.Stdout,
Name: "greet",
Flags: []Flag{
&StringFlag{Name: "name", DefaultValue: "bob", Usage: "a name to say"},
},
Action: func(c *Context) error {
fmt.Fprintf(c.App.Writer, "Hello %v\n", c.String("name"))
fmt.Fprintf(c.App.ErrWriter, "Byebye %v\n", c.String("name"))
return nil
},
}
if err := app.Run(os.Args); err != nil {
log.Fatal(err)
}
// Output:
// Hello Jeremy
// Byebye Jeremy
}
func (ts *ApplicationSuite) ExampleApplication_Run_quietInvalid(c *C) {
resetOutputsInput()
// set args for examples sake
os.Args = []string{"greet", "--quiet=foo", "--name", "Jeremy"}
app := &Application{
Writer: os.Stdout,
ErrWriter: os.Stdout,
Name: "greet",
Flags: []Flag{
&StringFlag{Name: "name", DefaultValue: "bob", Usage: "a name to say"},
},
Action: func(c *Context) error {
fmt.Fprintf(c.App.Writer, "Hello %v\n", c.String("name"))
fmt.Fprintf(c.App.ErrWriter, "Byebye %v\n", c.String("name"))
return nil
},
}
if err := app.Run(os.Args); err != nil {
log.Fatal(err)
}
c.Assert(stdout.String(), Equals, `Output:
<info>greet</> version <comment>0.0.0</>
A new cli application
<comment>Usage</>:
app [first_arg] [second_arg]
<comment>Global options:</>
<info>--help, -h</> Show help <comment>[default: false]</>
<info>--quiet, -q</> Do not output any message
<info>-v|vv|vvv, --verbose, --log-level</> Increase the verbosity of messages: 1 for normal output, 2 and 3 for more verbose outputs and 4 for debug <comment>[default: 1]</>
<info>-V</> Print the version <comment>[default: false]</>
<info>--name=value</> a name to say <comment>[default: "bob"]</>
<comment>Available commands:</>
<comment>self</>
<info>self:help, help, list</> Display help for a command or a category of commands
<info>self:version, version</> Display the application version
`)
}
func (ts *ApplicationSuite) ExampleApplication_Run_appHelp(c *C) {
resetOutputsInput()
// set args for examples sake
os.Args = []string{"greet", "help"}
app := &Application{
Writer: os.Stdout,
ErrWriter: os.Stderr,
Name: "greet",
Version: "0.1.0",
Description: "This is how we describe greet the app",
Flags: []Flag{
&StringFlag{Name: "name", DefaultValue: "bob", Usage: "a name to say"},
},
Commands: []*Command{
{
Name: "describeit",
Aliases: []*Alias{{Name: "d"}},
Args: ArgDefinition{
&Arg{Name: "id"},
},
Usage: "use it to see a description",
Description: "This is how we describe describeit the function",
Action: func(c *Context) error {
fmt.Printf("i like to describe things")
return nil
},
},
},
}
if err := app.Run(os.Args); err != nil {
log.Fatal(err)
}
c.Assert(stdout.String(), Equals, `Output:
<info>greet</> version <comment>0.1.0</>
A new cli application
<comment>Usage</>:
greet [global options] <command> [command options] [arguments...]
This is how we describe greet the app
<comment>Global options:</>
<info>--help, -h</> Show help <comment>[default: false]</>
<info>--quiet, -q</> Do not output any message
<info>-v|vv|vvv, --verbose, --log-level</> Increase the verbosity of messages: 1 for normal output, 2 and 3 for more verbose outputs and 4 for debug <comment>[default: 1]</>
<info>-V</> Print the version <comment>[default: false]</>
<info>--name=value</> a name to say <comment>[default: "bob"]</>
<comment>Available commands:</>
<info>describeit, d</> use it to see a description
<comment>self</>
<info>self:help, help, list</> Display help for a command or a category of commands
`)
}
func ExampleApplication_Run_commandHelp() {
// set args for examples sake
os.Args = []string{"greet", "help", "describeit"}
app := &Application{
Writer: os.Stdout,
ErrWriter: os.Stderr,
Name: "greet",
HelpName: "greet",
Flags: []Flag{
&StringFlag{Name: "name", DefaultValue: "bob", Usage: "a name to say"},
},
Commands: []*Command{
{
Name: "describeit",
Aliases: []*Alias{{Name: "d"}},
Usage: "use it to see a description",
Description: "This is how we describe describeit the function",
Action: func(c *Context) error {
fmt.Printf("i like to describe things")
return nil
},
},
},
}
if err := app.Run(os.Args); err != nil {
log.Fatal(err)
}
// Output:
// <comment>Description:</>
// use it to see a description
//
// <comment>Usage:</>
// greet describeit
//
//
// <comment>Help:</>
//
// This is how we describe describeit the function
}
func (ts *ApplicationSuite) TestApp_Run(c *C) {
s := ""
app := &Application{
Action: func(c *Context) error {
s += c.Args().first()
return nil
},
}
err := app.Run([]string{"command", "foo"})
c.Assert(err, Equals, nil)
err = app.Run([]string{"command", "bar"})
c.Assert(err, Equals, nil)
c.Assert(s, Equals, "foobar")
}
var commandAppTests = []struct {
name string
expected bool
}{
{"foobar", true},
{"batbaz", true},
{"b", true},
{"f", true},
{"bata", false},
{"nothing", false},
}
func (ts *ApplicationSuite) TestApp_Command(c *C) {
app := &Application{}
fooCommand := &Command{Name: "foobar", Aliases: []*Alias{{Name: "f"}}}
batCommand := &Command{Name: "batbaz", Aliases: []*Alias{{Name: "b"}}}
app.Commands = []*Command{
fooCommand,
batCommand,
}
for _, test := range commandAppTests {
c.Assert(app.Command(test.name) != nil, Equals, test.expected)
}
}
func (ts *ApplicationSuite) TestApp_CommandWithFlagBeforeTerminator(c *C) {
var parsedOption string
var args Args
app := &Application{}
command := &Command{
Name: "cmd",
Flags: []Flag{
&StringFlag{Name: "option", DefaultValue: "", Usage: "some option"},
},
Args: ArgDefinition{
&Arg{Name: "first"},
&Arg{Name: "second"},
},
Action: func(c *Context) error {
parsedOption = c.String("option")
args = c.Args()
return nil
},
}
app.Commands = []*Command{command}
c.Assert(app.Run([]string{"", "cmd", "--option", "my-option", "my-arg", "--", "--notARealFlag"}), IsNil)
c.Assert(parsedOption, Equals, "my-option")
c.Assert(args, NotNil)
c.Assert(args.Get("first"), Equals, "my-arg")
c.Assert(args.Get("second"), Equals, "--notARealFlag")
}
func (ts *ApplicationSuite) TestApp_CommandWithDash(c *C) {
var args Args
app := &Application{}
command := &Command{
Name: "cmd",
Args: ArgDefinition{
&Arg{Name: "first"},
&Arg{Name: "second"},
},
Action: func(c *Context) error {
args = c.Args()
return nil
},
}
app.Commands = []*Command{command}
c.Assert(app.Run([]string{"", "cmd", "my-arg", "-"}), IsNil)
c.Assert(args, NotNil)
c.Assert(args.Len(), Equals, 2)
c.Assert(args.Get("first"), Equals, "my-arg")
c.Assert(args.Get("second"), Equals, "-")
}
func (ts *ApplicationSuite) TestApp_CommandWithNoFlagBeforeTerminator(c *C) {
var args Args
app := &Application{}
command := &Command{
Name: "cmd",
Args: ArgDefinition{
&Arg{Name: "first"},
&Arg{Name: "second"},
},
Action: func(c *Context) error {
args = c.Args()
return nil
},
}
app.Commands = []*Command{command}
c.Assert(app.Run([]string{"", "cmd", "my-arg", "--", "notAFlagAtAll"}), IsNil)
c.Assert(args.Get("first"), Equals, "my-arg")
c.Assert(args.Get("second"), Equals, "notAFlagAtAll")
}
func (ts *ApplicationSuite) TestApp_VisibleCommands(c *C) {
frob := &Command{
Name: "frob",
HelpName: "foo frob",
Action: func(_ *Context) error { return nil },
}
app := &Application{
Commands: []*Command{
frob,
{
Name: "frib",
HelpName: "foo frib",
Hidden: Hide,
Action: func(_ *Context) error { return nil },
},
},
}
helpCommand.Hidden = Hide
versionCommand.Hidden = Hide
defer func() {
helpCommand.Hidden = nil
versionCommand.Hidden = nil
}()
app.setup()
expected := []*Command{
frob,
}
actual := app.VisibleCommands()
c.Assert(len(actual), Equals, len(expected))
for i, actualCommand := range actual {
expectedCommand := expected[i]
if expectedCommand.Action != nil {
// comparing func addresses is OK!
c.Assert(fmt.Sprintf("%p", actualCommand.Action), Equals, fmt.Sprintf("%p", expectedCommand.Action))
}
func() {
// nil out funcs, as they cannot be compared
// (https://github.com/golang/go/issues/8554)
expectedAction := expectedCommand.Action
actualAction := actualCommand.Action
defer func() {
expectedCommand.Action = expectedAction
actualCommand.Action = actualAction
}()
expectedCommand.Action = nil
actualCommand.Action = nil
c.Assert(expectedCommand, DeepEquals, actualCommand)
}()
}
}
func (ts *ApplicationSuite) TestApp_Float64Flag(c *C) {
var meters float64
app := &Application{
Flags: []Flag{
&Float64Flag{Name: "height", DefaultValue: 1.5, Usage: "Set the height, in meters"},
},
Action: func(c *Context) error {
meters = c.Float64("height")
return nil
},
}
c.Assert(app.Run([]string{"", "--height", "1.93"}), IsNil)
c.Assert(meters, Equals, 1.93)
}
func TestApp_ParseSliceFlags(t *testing.T) {
var firstArg string
var parsedIntSlice []int
var parsedStringSlice []string
app := &Application{}
command := &Command{
Name: "cmd",
Flags: []Flag{
&IntSliceFlag{Name: "p", Destination: NewIntSlice(), Usage: "set one or more ip addr"},
&StringSliceFlag{Name: "ip", Destination: NewStringSlice(), Usage: "set one or more ports to open"},
},
Args: []*Arg{
{Name: "my-arg"},
},
Action: func(c *Context) error {
parsedIntSlice = c.IntSlice("p")
parsedStringSlice = c.StringSlice("ip")
firstArg = c.Args().first()
return nil
},
}
app.Commands = []*Command{command}
if err := app.Run([]string{"", "cmd", "-p", "22", "-p", "80", "-ip", "8.8.8.8", "-ip", "8.8.4.4", "my-first-arg"}); err != nil {
t.Error(err)
}
IntsEquals := func(a, b []int) bool {
if len(a) != len(b) {
return false
}
for i, v := range a {
if v != b[i] {
return false
}
}
return true
}
StrsEquals := func(a, b []string) bool {
if len(a) != len(b) {
return false
}
for i, v := range a {
if v != b[i] {
return false
}
}
return true
}
var expectedIntSlice = []int{22, 80}
var expectedStringSlice = []string{"8.8.8.8", "8.8.4.4"}
if !IntsEquals(parsedIntSlice, expectedIntSlice) {
t.Errorf("%v does not match %v", parsedIntSlice, expectedIntSlice)
}
if !StrsEquals(parsedStringSlice, expectedStringSlice) {
t.Errorf("%v does not match %v", parsedStringSlice, expectedStringSlice)
}
if firstArg != "my-first-arg" {
t.Errorf("%v does not match %v", firstArg, "my-first-arg")
}
}
func TestApp_ParseSliceFlagsWithMissingValue(t *testing.T) {
var parsedIntSlice []int
var parsedStringSlice []string
app := &Application{}
command := &Command{
Name: "cmd",
Flags: []Flag{
&IntSliceFlag{Name: "a", Usage: "set numbers"},
&StringSliceFlag{Name: "str", Usage: "set strings"},
},
Args: []*Arg{
{Name: "my-arg"},
},
Action: func(c *Context) error {
parsedIntSlice = c.IntSlice("a")
parsedStringSlice = c.StringSlice("str")
return nil
},
}
app.Commands = []*Command{command}
if err := app.Run([]string{"", "cmd", "-a", "2", "-str", "A", "my-arg"}); err != nil {
t.Error(err)
}
var expectedIntSlice = []int{2}
var expectedStringSlice = []string{"A"}
if len(parsedIntSlice) != len(expectedIntSlice) {
t.Fatalf("%v does not match %v", len(parsedIntSlice), len(expectedIntSlice))
}
if parsedIntSlice[0] != expectedIntSlice[0] {
t.Errorf("%v does not match %v", parsedIntSlice[0], expectedIntSlice[0])
}
if len(parsedStringSlice) != len(expectedStringSlice) {
t.Fatalf("%v does not match %v", len(parsedStringSlice), len(expectedStringSlice))
}
if parsedStringSlice[0] != expectedStringSlice[0] {
t.Errorf("%v does not match %v", parsedIntSlice[0], expectedIntSlice[0])
}
}
func TestApp_DefaultStdout(t *testing.T) {
app := &Application{}
app.setup()
if app.Writer == nil {
t.Error("Default output writer not set.")
}
}
type mockWriter struct {
written []byte
}
func (fw *mockWriter) Write(p []byte) (n int, err error) {
if fw.written == nil {
fw.written = p
} else {
fw.written = append(fw.written, p...)
}
return len(p), nil
}
func (fw *mockWriter) GetWritten() (b []byte) {
return fw.written
}
func TestApp_SetStdout(t *testing.T) {
w := &mockWriter{}
app := &Application{
Name: "test",
Writer: w,
}
err := app.Run([]string{"help"})
if err != nil {
t.Fatalf("Run error: %s", err)
}
if len(w.written) == 0 {
t.Error("App did not write output to desired writer.")
}
}
func TestApp_BeforeFunc(t *testing.T) {
counts := &opCounts{}
beforeError := errors.New("fail")
var err error
app := &Application{
Before: func(c *Context) error {
counts.Total++
counts.Before = counts.Total
s := c.String("opt")
if s == "fail" {
return beforeError
}
return nil
},
Commands: []*Command{
{
Name: "sub",
Action: func(c *Context) error {
counts.Total++
return nil
},
},
},
Flags: []Flag{
&StringFlag{Name: "opt"},
},
}
// run with the Before() func succeeding
err = app.Run([]string{"command", "--opt", "succeed", "sub"})
if err != nil {
t.Fatalf("Run error: %s", err)
}
if counts.Before != 1 {
t.Errorf("Before() not executed when expected")
}
// reset
counts = &opCounts{}
// run with the Before() func failing
err = app.Run([]string{"command", "--opt", "fail", "sub"})
// should be the same error produced by the Before func
if err != beforeError {
t.Errorf("Run error expected, but not received")
}
if counts.Before != 1 {
t.Errorf("Before() not executed when expected")
}
// reset
counts = &opCounts{}
afterError := errors.New("fail again")
app.After = func(_ *Context) error {
return afterError
}
// run with the Before() func failing, wrapped by After()
err = app.Run([]string{"command", "--opt", "fail", "sub"})
// should be the same error produced by the Before func
if _, ok := err.(MultiError); !ok {
t.Errorf("MultiError expected, but not received")
}
if counts.Before != 1 {
t.Errorf("Before() not executed when expected")
}
}
func TestApp_AfterFunc(t *testing.T) {
counts := &opCounts{}
afterError := errors.New("fail")
var err error
app := &Application{
After: func(c *Context) error {
counts.Total++
counts.After = counts.Total
s := c.String("opt")
if s == "fail" {
return afterError
}
return nil
},
Commands: []*Command{
{
Name: "sub",
Action: func(c *Context) error {
counts.Total++
return nil
},
},
},
Flags: []Flag{
&StringFlag{Name: "opt"},
},
}
// run with the After() func succeeding
err = app.Run([]string{"command", "--opt", "succeed", "sub"})
if err != nil {
t.Fatalf("Run error: %s", err)
}
if counts.After != 2 {
t.Errorf("After() not executed when expected")
}
// reset
counts = &opCounts{}
// run with the Before() func failing
err = app.Run([]string{"command", "--opt", "fail", "sub"})
// should be the same error produced by the Before func
if err != afterError {
t.Errorf("Run error expected, but not received")
}
if counts.After != 2 {
t.Errorf("After() not executed when expected")
}
}
func TestAppNoHelpFlag(t *testing.T) {
oldFlag := HelpFlag
defer func() {
HelpFlag = oldFlag
}()
HelpFlag = nil
app := &Application{Writer: io.Discard}
err := app.Run([]string{"test", "-h"})
if !strings.Contains(err.Error(), flag.ErrHelp.Error()) {
t.Errorf("expected error about missing help flag, but got: %q (%T)", err, err)
}
}
func TestAppHelpPrinter(t *testing.T) {
oldPrinter := HelpPrinter
defer func() {
HelpPrinter = oldPrinter
}()
var wasCalled = false
HelpPrinter = func(w io.Writer, template string, data interface{}) {
wasCalled = true
}
app := &Application{}
if err := app.Run([]string{"-h"}); err != nil {
t.Error(err)
}
if wasCalled == false {
t.Errorf("Help printer expected to be called, but was not")
}
}
func TestApp_VersionPrinter(t *testing.T) {
oldPrinter := VersionPrinter
defer func() {
VersionPrinter = oldPrinter
}()
var wasCalled = false
VersionPrinter = func(c *Context) {
wasCalled = true
}
app := &Application{}
ctx := NewContext(app, nil, nil)
ShowVersion(ctx)
if wasCalled == false {
t.Errorf("Version printer expected to be called, but was not")
}
}
func (ts *ApplicationSuite) TestApp_OrderOfOperations(c *C) {
counts := &opCounts{}
resetCounts := func() { counts = &opCounts{} }
app := &Application{}
beforeNoError := func(c *Context) error {
counts.Total++
counts.Before = counts.Total
return nil
}
beforeError := func(c *Context) error {
counts.Total++
counts.Before = counts.Total
return errors.New("hay Before")
}
app.Before = beforeNoError
afterNoError := func(c *Context) error {
counts.Total++
counts.After = counts.Total
return nil
}
afterError := func(c *Context) error {
counts.Total++
counts.After = counts.Total
return errors.New("hay After")
}
app.After = afterNoError
app.Commands = []*Command{
{
Name: "bar",
Action: func(c *Context) error {
counts.Total++
return nil
},
},
}
app.Action = func(c *Context) error {
counts.Total++
counts.Action = counts.Total
return nil
}
_ = app.Run([]string{"command", "--nope"})
c.Assert(counts.Total, Equals, 0)
resetCounts()
_ = app.Run([]string{"command", "--nope"})
c.Assert(counts.Total, Equals, 0)
resetCounts()
_ = app.Run([]string{"command", "foo"})
c.Assert(counts.Before, Equals, 1)
c.Assert(counts.Action, Equals, 2)
c.Assert(counts.After, Equals, 3)
c.Assert(counts.Total, Equals, 3)
resetCounts()
app.Before = beforeError
_ = app.Run([]string{"command", "bar"})
c.Assert(counts.Before, Equals, 1)
c.Assert(counts.After, Equals, 2)
c.Assert(counts.Total, Equals, 2)
app.Before = beforeNoError
resetCounts()
app.After = nil
_ = app.Run([]string{"command", "bar"})
c.Assert(counts.Before, Equals, 1)
c.Assert(counts.Total, Equals, 2)
app.After = afterNoError
resetCounts()
app.After = afterError
err := app.Run([]string{"command", "bar"})
c.Assert(err, NotNil)
c.Assert(counts.Before, Equals, 1)
c.Assert(counts.After, Equals, 3)
c.Assert(counts.Total, Equals, 3)
app.After = afterNoError
resetCounts()
oldCommands := app.Commands
app.Commands = nil
_ = app.Run([]string{"command"})
c.Assert(counts.Before, Equals, 1)
c.Assert(counts.Action, Equals, 2)
c.Assert(counts.After, Equals, 3)
c.Assert(counts.Total, Equals, 3)
app.Commands = oldCommands
}
func TestApp_Run_CommandHelpName(t *testing.T) {
t.SkipNow()
app := &Application{}
buf := new(bytes.Buffer)
app.Writer = buf
app.Name = "command"
cmd := &Command{
Name: "foo",
HelpName: "custom",
Description: "foo commands",
}
app.Commands = []*Command{cmd}
err := app.Run([]string{"command", "foo", "bar", "--help"})
if err != nil {
t.Error(err)
}
output := buf.String()
expected := "command foo bar - does bar things"
if !strings.Contains(output, expected) {
t.Errorf("expected %q in output: %s", expected, output)
}
expected = "command foo bar [command options] [arguments...]"
if !strings.Contains(output, expected) {
t.Errorf("expected %q in output: %s", expected, output)
}
}
func TestApp_Run_Help(t *testing.T) {
var helpArguments = [][]string{{"boom", "--help"}, {"boom", "-h"}, {"boom", "help"}}
for _, args := range helpArguments {
buf := new(bytes.Buffer)
app := &Application{
Name: "boom",
Usage: "make an explosive entrance",
Writer: buf,
Action: func(c *Context) error {
buf.WriteString("boom I say!")
return nil
},
}
err := app.Run(args)
if err != nil {
t.Error(err)
}
output := buf.String()
if !strings.Contains(output, "<info>boom</> version") || !strings.Contains(output, "\nmake an explosive entrance") {
t.Logf("==> checking with arguments %v", args)
t.Logf("output: %q\n", buf.Bytes())
t.Errorf("want help to contain %q, did not: \n%q", "boom version [...] make an explosive entrance", output)
}
}
}
func TestApp_Run_Version(t *testing.T) {
var versionArguments = [][]string{{"boom", "-V"}}
for _, args := range versionArguments {
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