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cli_test.go
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cli_test.go
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package cli_test
import (
"context"
"errors"
"fmt"
"io"
"strings"
"testing"
"github.com/gbrlsnchs/cli"
"github.com/google/go-cmp/cmp"
)
func TestCommandLine(t *testing.T) {
testCommandLineParseAndRun(t)
}
func testCommandLineParseAndRun(t *testing.T) {
type testCommand struct {
*testing.T
parg1 string
parg2 string
parg3 string
rargs []string
fstr string
fbool bool
fint int
flong int64
}
var root testCommand
testCases := []struct {
desc string
entry *cli.Command
opts []func(*cli.CLI)
args []string
wantCode int
wantOut string
wantErr string
wantCombined string
cancelCtx bool
}{
{
desc: "main command without args or options",
entry: &cli.Command{
Exec: func(_ cli.Program) error {
t := root.T
if want, got := "", root.parg1; got != want {
t.Fatalf("want %q, got %q", want, got)
}
return nil
},
Subcommands: nil,
},
args: []string{"test"},
wantCode: 0,
wantOut: "",
wantErr: "",
wantCombined: "",
},
{
desc: "print help of main command without args or options",
entry: &cli.Command{
Exec: func(_ cli.Program) error {
t := root.T
if want, got := "", root.parg1; got != want {
t.Fatalf("want %q, got %q", want, got)
}
return nil
},
Subcommands: nil,
},
args: []string{"test", "-h"},
wantCode: 0,
wantOut: `USAGE:
test [OPTIONS]
OPTIONS:
-h, -help print help information
`,
wantErr: "",
wantCombined: `USAGE:
test [OPTIONS]
OPTIONS:
-h, -help print help information
`,
},
{
desc: "print help of main command without args or options and with fixed name",
entry: &cli.Command{
Exec: func(_ cli.Program) error {
t := root.T
if want, got := "", root.parg1; got != want {
t.Fatalf("want %q, got %q", want, got)
}
return nil
},
Subcommands: nil,
},
opts: []func(*cli.CLI){
cli.Name("my-cmd"),
},
args: []string{"test", "-h"},
wantCode: 0,
wantOut: `USAGE:
my-cmd [OPTIONS]
OPTIONS:
-h, -help print help information
`,
wantErr: "",
wantCombined: `USAGE:
my-cmd [OPTIONS]
OPTIONS:
-h, -help print help information
`,
},
{
desc: "print help of main command without args or options and with description",
entry: &cli.Command{
Description: "this is main command",
Exec: func(_ cli.Program) error {
t := root.T
if want, got := "", root.parg1; got != want {
t.Fatalf("want %q, got %q", want, got)
}
return nil
},
Subcommands: nil,
},
args: []string{"test", "-h"},
wantCode: 0,
wantOut: `this is main command
USAGE:
test [OPTIONS]
OPTIONS:
-h, -help print help information
`,
wantErr: "",
wantCombined: `this is main command
USAGE:
test [OPTIONS]
OPTIONS:
-h, -help print help information
`,
},
{
desc: "print help of main command without args or options and with wrapping description",
entry: &cli.Command{
Description: `this is main command and this description is so long that it will eventually get wrapped if it exceeds 72 characters
also new lines manually inserted must be preserved`,
Exec: func(_ cli.Program) error {
t := root.T
if want, got := "", root.parg1; got != want {
t.Fatalf("want %q, got %q", want, got)
}
return nil
},
Subcommands: nil,
},
args: []string{"test", "-h"},
wantCode: 0,
wantOut: `this is main command and this description is so long that it will
eventually get wrapped if it exceeds 72 characters
also new lines manually inserted must be preserved
USAGE:
test [OPTIONS]
OPTIONS:
-h, -help print help information
`,
wantErr: "",
wantCombined: `this is main command and this description is so long that it will
eventually get wrapped if it exceeds 72 characters
also new lines manually inserted must be preserved
USAGE:
test [OPTIONS]
OPTIONS:
-h, -help print help information
`,
},
{
desc: "main command with one optional arg",
entry: &cli.Command{
Exec: func(_ cli.Program) error {
t := root.T
if want, got := "foo", root.parg1; got != want {
t.Fatalf("want %q, got %q", want, got)
}
return nil
},
Subcommands: nil,
Arg: cli.StringArg{
Label: "FOO",
Recipient: &root.parg1,
},
},
args: []string{"test", "foo"},
wantCode: 0,
wantOut: "",
wantErr: "",
wantCombined: "",
},
{
desc: "print help of main command with one optional arg",
entry: &cli.Command{
Exec: func(_ cli.Program) error {
t := root.T
if want, got := "", root.parg1; got != want {
t.Fatalf("want %q, got %q", want, got)
}
return nil
},
Subcommands: nil,
Arg: cli.StringArg{
Label: "FOO",
Recipient: &root.parg1,
},
},
args: []string{"test", "-h"},
wantCode: 0,
wantOut: `USAGE:
test [OPTIONS] [FOO]
OPTIONS:
-h, -help print help information
`,
wantErr: "",
wantCombined: `USAGE:
test [OPTIONS] [FOO]
OPTIONS:
-h, -help print help information
`,
},
{
desc: "main command missing one optional arg",
entry: &cli.Command{
Exec: func(_ cli.Program) error {
t := root.T
if want, got := "", root.parg1; got != want {
t.Fatalf("want %q, got %q", want, got)
}
return nil
},
Subcommands: nil,
Arg: cli.StringArg{
Label: "FOO",
Recipient: &root.parg1,
},
},
args: []string{"test"},
wantCode: 0,
wantOut: "",
wantErr: "",
wantCombined: "",
},
{
desc: "main command with one required arg",
entry: &cli.Command{
Exec: func(_ cli.Program) error {
t := root.T
if want, got := "foo", root.parg1; got != want {
t.Fatalf("want %q, got %q", want, got)
}
return nil
},
Subcommands: nil,
Arg: cli.StringArg{
Label: "FOO",
Required: true,
Recipient: &root.parg1,
},
},
args: []string{"test", "foo"},
wantCode: 0,
wantOut: "",
wantErr: "",
wantCombined: "",
},
{
desc: "print help of main command with one required arg",
entry: &cli.Command{
Exec: func(_ cli.Program) error {
t := root.T
if want, got := "", root.parg1; got != want {
t.Fatalf("want %q, got %q", want, got)
}
return nil
},
Subcommands: nil,
Arg: cli.StringArg{
Label: "FOO",
Required: true,
Recipient: &root.parg1,
},
},
args: []string{"test", "-h"},
wantCode: 0,
wantOut: `USAGE:
test [OPTIONS] <FOO>
OPTIONS:
-h, -help print help information
`,
wantErr: "",
wantCombined: `USAGE:
test [OPTIONS] <FOO>
OPTIONS:
-h, -help print help information
`,
},
{
desc: "main command missing one required arg",
entry: &cli.Command{
Exec: func(_ cli.Program) error {
t := root.T
if want, got := "", root.parg1; got != want {
t.Fatalf("want %q, got %q", want, got)
}
return nil
},
Subcommands: nil,
Arg: cli.StringArg{
Label: "FOO",
Required: true,
Recipient: &root.parg1,
},
},
args: []string{"test"},
wantCode: 2,
wantOut: "",
wantErr: `test: missing required argument: FOO
USAGE:
test [OPTIONS] <FOO>
OPTIONS:
-h, -help print help information
`,
wantCombined: `test: missing required argument: FOO
USAGE:
test [OPTIONS] <FOO>
OPTIONS:
-h, -help print help information
`,
},
{
desc: "main command with two optional args",
entry: &cli.Command{
Exec: func(_ cli.Program) error {
t := root.T
if want, got := "foo", root.parg1; got != want {
t.Fatalf("want %q, got %q", want, got)
}
if want, got := "bar", root.parg2; got != want {
t.Fatalf("want %q, got %q", want, got)
}
return nil
},
Subcommands: nil,
Arg: cli.StringArg{
Label: "FOO",
Recipient: &root.parg1,
Next: cli.StringArg{
Label: "BAR",
Recipient: &root.parg2,
},
},
},
args: []string{"test", "foo", "bar"},
wantCode: 0,
wantOut: "",
wantErr: "",
wantCombined: "",
},
{
desc: "print help of main command with two optional args",
entry: &cli.Command{
Exec: func(_ cli.Program) error {
t := root.T
if want, got := "", root.parg1; got != want {
t.Fatalf("want %q, got %q", want, got)
}
if want, got := "", root.parg2; got != want {
t.Fatalf("want %q, got %q", want, got)
}
return nil
},
Subcommands: nil,
Arg: cli.StringArg{
Label: "FOO",
Recipient: &root.parg1,
Next: cli.StringArg{
Label: "BAR",
Recipient: &root.parg2,
},
},
},
args: []string{"test", "-h"},
wantCode: 0,
wantOut: `USAGE:
test [OPTIONS] [FOO [BAR]]
OPTIONS:
-h, -help print help information
`,
wantErr: "",
wantCombined: `USAGE:
test [OPTIONS] [FOO [BAR]]
OPTIONS:
-h, -help print help information
`,
},
{
desc: "main command missing two optional args",
entry: &cli.Command{
Exec: func(_ cli.Program) error {
t := root.T
if want, got := "", root.parg1; got != want {
t.Fatalf("want %q, got %q", want, got)
}
if want, got := "", root.parg2; got != want {
t.Fatalf("want %q, got %q", want, got)
}
return nil
},
Subcommands: nil,
Arg: cli.StringArg{
Label: "FOO",
Recipient: &root.parg1,
Next: cli.StringArg{
Label: "BAR",
Recipient: &root.parg2,
},
},
},
args: []string{"test"},
wantCode: 0,
wantOut: "",
wantErr: "",
wantCombined: "",
},
{
desc: "main command with first arg required and second one optional",
entry: &cli.Command{
Exec: func(_ cli.Program) error {
t := root.T
if want, got := "foo", root.parg1; got != want {
t.Fatalf("want %q, got %q", want, got)
}
if want, got := "bar", root.parg2; got != want {
t.Fatalf("want %q, got %q", want, got)
}
return nil
},
Subcommands: nil,
Arg: cli.StringArg{
Label: "FOO",
Required: true,
Recipient: &root.parg1,
Next: cli.StringArg{
Label: "BAR",
Recipient: &root.parg2,
},
},
},
args: []string{"test", "foo", "bar"},
wantCode: 0,
wantOut: "",
wantErr: "",
wantCombined: "",
},
{
desc: "print help of main command with first arg required and second one optional",
entry: &cli.Command{
Exec: func(_ cli.Program) error {
t := root.T
if want, got := "", root.parg1; got != want {
t.Fatalf("want %q, got %q", want, got)
}
if want, got := "", root.parg2; got != want {
t.Fatalf("want %q, got %q", want, got)
}
return nil
},
Subcommands: nil,
Arg: cli.StringArg{
Label: "FOO",
Required: true,
Recipient: &root.parg1,
Next: cli.StringArg{
Label: "BAR",
Recipient: &root.parg2,
},
},
},
args: []string{"test", "-h"},
wantCode: 0,
wantOut: `USAGE:
test [OPTIONS] <FOO> [BAR]
OPTIONS:
-h, -help print help information
`,
wantErr: "",
wantCombined: `USAGE:
test [OPTIONS] <FOO> [BAR]
OPTIONS:
-h, -help print help information
`,
},
{
desc: "main command missing second optional argument with first one required",
entry: &cli.Command{
Exec: func(_ cli.Program) error {
t := root.T
if want, got := "foo", root.parg1; got != want {
t.Fatalf("want %q, got %q", want, got)
}
if want, got := "", root.parg2; got != want {
t.Fatalf("want %q, got %q", want, got)
}
return nil
},
Subcommands: nil,
Arg: cli.StringArg{
Label: "FOO",
Recipient: &root.parg1,
Next: cli.StringArg{
Label: "BAR",
Recipient: &root.parg2,
},
},
},
args: []string{"test", "foo"},
wantCode: 0,
wantOut: "",
wantErr: "",
wantCombined: "",
},
{
desc: "main command with one optional repeating arg",
entry: &cli.Command{
Exec: func(_ cli.Program) error {
t := root.T
if want, got := []string{"foo"}, root.rargs; !cmp.Equal(got, want) {
t.Fatalf("(-want +got):\n%s", cmp.Diff(want, got))
}
return nil
},
Subcommands: nil,
Arg: cli.RepeatingArg{
Label: "FOO",
Recipient: &root.rargs,
},
},
args: []string{"test", "foo"},
wantCode: 0,
wantOut: "",
wantErr: "",
wantCombined: "",
},
{
desc: "main command with two optional repeating arg",
entry: &cli.Command{
Exec: func(_ cli.Program) error {
t := root.T
if want, got := []string{"foo", "bar"}, root.rargs; !cmp.Equal(got, want) {
t.Fatalf("(-want +got):\n%s", cmp.Diff(want, got))
}
return nil
},
Subcommands: nil,
Arg: cli.RepeatingArg{
Label: "FOO",
Recipient: &root.rargs,
},
},
args: []string{"test", "foo", "bar"},
wantCode: 0,
wantOut: "",
wantErr: "",
wantCombined: "",
},
{
desc: "print help of main command with one optional repeating arg",
entry: &cli.Command{
Exec: func(_ cli.Program) error {
t := root.T
if want, got := ([]string)(nil), root.rargs; !cmp.Equal(got, want) {
t.Fatalf("(-want +got):\n%s", cmp.Diff(want, got))
}
return nil
},
Subcommands: nil,
Arg: cli.RepeatingArg{
Label: "FOO",
Recipient: &root.rargs,
},
},
args: []string{"test", "-h"},
wantCode: 0,
wantOut: `USAGE:
test [OPTIONS] [FOO ...]
OPTIONS:
-h, -help print help information
`,
wantErr: "",
wantCombined: `USAGE:
test [OPTIONS] [FOO ...]
OPTIONS:
-h, -help print help information
`,
},
{
desc: "main command with one required repeating arg",
entry: &cli.Command{
Exec: func(_ cli.Program) error {
t := root.T
if want, got := []string{"foo"}, root.rargs; !cmp.Equal(got, want) {
t.Fatalf("(-want +got):\n%s", cmp.Diff(want, got))
}
return nil
},
Subcommands: nil,
Arg: cli.RepeatingArg{
Label: "FOO",
Required: true,
Recipient: &root.rargs,
},
},
args: []string{"test", "foo"},
wantCode: 0,
wantOut: "",
wantErr: "",
wantCombined: "",
},
{
desc: "main command with required repeating arg missing",
entry: &cli.Command{
Exec: func(_ cli.Program) error {
t := root.T
if want, got := []string{"foo"}, root.rargs; !cmp.Equal(got, want) {
t.Fatalf("(-want +got):\n%s", cmp.Diff(want, got))
}
return nil
},
Subcommands: nil,
Arg: cli.RepeatingArg{
Label: "FOO",
Required: true,
Recipient: &root.rargs,
},
},
args: []string{"test"},
wantCode: 2,
wantOut: "",
wantErr: `test: missing required argument: FOO
USAGE:
test [OPTIONS] <FOO> [...]
OPTIONS:
-h, -help print help information
`,
wantCombined: `test: missing required argument: FOO
USAGE:
test [OPTIONS] <FOO> [...]
OPTIONS:
-h, -help print help information
`,
},
{
desc: "print help of main command with one required repeating arg",
entry: &cli.Command{
Exec: func(_ cli.Program) error {
t := root.T
if want, got := ([]string)(nil), root.rargs; !cmp.Equal(got, want) {
t.Fatalf("(-want +got):\n%s", cmp.Diff(want, got))
}
return nil
},
Subcommands: nil,
Arg: cli.RepeatingArg{
Label: "FOO",
Required: true,
Recipient: &root.rargs,
},
},
args: []string{"test", "-h"},
wantCode: 0,
wantOut: `USAGE:
test [OPTIONS] <FOO> [...]
OPTIONS:
-h, -help print help information
`,
wantErr: "",
wantCombined: `USAGE:
test [OPTIONS] <FOO> [...]
OPTIONS:
-h, -help print help information
`,
},
{
desc: "main command missing one optional repeating arg",
entry: &cli.Command{
Exec: func(_ cli.Program) error {
t := root.T
if want, got := ([]string)(nil), root.rargs; !cmp.Equal(got, want) {
t.Fatalf("(-want +got):\n%s", cmp.Diff(want, got))
}
return nil
},
Subcommands: nil,
Arg: cli.StringArg{
Label: "FOO",
Recipient: &root.parg1,
},
},
args: []string{"test"},
wantCode: 0,
wantOut: "",
wantErr: "",
wantCombined: "",
},
{
desc: "main command with options",
entry: &cli.Command{
Exec: func(_ cli.Program) error {
t := root.T
if want, got := "foo", root.fstr; got != want {
t.Errorf("want %q, got %q", want, got)
}
if want, got := true, root.fbool; got != want {
t.Errorf("want %t, got %t", want, got)
}
if want, got := 0xDEADC0DE, root.fint; got != want {
t.Errorf("want %d, got %d", want, got)
}
if want, got := int64(0xABADBABE), root.flong; got != want {
t.Errorf("want %d, got %d", want, got)
}
return nil
},
Subcommands: nil,
Options: map[string]cli.Option{
"string": cli.StringOption{
OptionDetails: cli.OptionDetails{
Description: "pass a string here",
Short: 's',
ArgLabel: "TEXT",
},
DefValue: "bar",
Recipient: &root.fstr,
},
"bool": cli.BoolOption{
OptionDetails: cli.OptionDetails{
Description: "pass a boolean here",
Short: 'b',
ArgLabel: "TRUE|FALSE",
},
Recipient: &root.fbool,
},
"int": cli.IntOption{
OptionDetails: cli.OptionDetails{
Description: "pass an integer here",
Short: 'i',
ArgLabel: "NUMBER",
},
Recipient: &root.fint,
},
"int64": cli.Int64Option{
OptionDetails: cli.OptionDetails{
Description: "pass a 64-bit integer here",
Short: 'I',
ArgLabel: "64-BIT NUMBER",
},
Recipient: &root.flong,
},
"dull": cli.StringOption{
OptionDetails: cli.OptionDetails{
Description: "just a dull flag",
},
Recipient: newDullStr(),
},
},
},
args: []string{"test", "-s", "foo", "-b", "-i", "0xDEADC0DE", "-I", "0xABADBABE"},
wantCode: 0,
wantOut: "",
wantErr: "",
wantCombined: "",
},
{
desc: "print help of main command with one optional arg",
entry: &cli.Command{
Exec: func(_ cli.Program) error {
t := root.T
if want, got := "foo", root.fstr; got != want {
t.Errorf("want %q, got %q", want, got)
}
if want, got := true, root.fbool; got != want {
t.Errorf("want %t, got %t", want, got)
}
if want, got := 0xDEADC0DE, root.fint; got != want {
t.Errorf("want %d, got %d", want, got)
}
if want, got := int64(0xABADBABE), root.flong; got != want {
t.Errorf("want %d, got %d", want, got)
}
return nil
},
Subcommands: nil,
Options: map[string]cli.Option{
"string": cli.StringOption{
OptionDetails: cli.OptionDetails{
Description: "pass a string here",
Short: 's',
ArgLabel: "TEXT",
},
DefValue: "bar",
Recipient: &root.fstr,
},
"bool": cli.BoolOption{
OptionDetails: cli.OptionDetails{
Description: "pass a boolean here",
Short: 'b',
ArgLabel: "TRUE|FALSE",
},
Recipient: &root.fbool,
},
"int": cli.IntOption{
OptionDetails: cli.OptionDetails{
Description: "pass an integer here",
Short: 'i',
ArgLabel: "NUMBER",
},
Recipient: &root.fint,
},
"int64": cli.Int64Option{
OptionDetails: cli.OptionDetails{
Description: "pass a 64-bit integer here",
Short: 'I',
ArgLabel: "64-BIT NUMBER",
},
Recipient: &root.flong,
},
"dull": cli.StringOption{
OptionDetails: cli.OptionDetails{
Description: "just a dull option",
},
Recipient: newDullStr(),
},
},
},
args: []string{"test", "-h"},
wantCode: 0,
wantOut: `USAGE:
test [OPTIONS]
OPTIONS:
-b, -bool <TRUE|FALSE> pass a boolean here
-dull just a dull option
-h, -help print help information
-i, -int <NUMBER> pass an integer here
-I, -int64 <64-BIT NUMBER> pass a 64-bit integer here
-s, -string <TEXT> pass a string here (default: "bar")
`,
wantErr: "",
wantCombined: `USAGE:
test [OPTIONS]
OPTIONS:
-b, -bool <TRUE|FALSE> pass a boolean here
-dull just a dull option
-h, -help print help information
-i, -int <NUMBER> pass an integer here
-I, -int64 <64-BIT NUMBER> pass a 64-bit integer here
-s, -string <TEXT> pass a string here (default: "bar")
`,
},
{
desc: "subcommand misuse",
entry: &cli.Command{
Description: "this is a description",
Exec: func(_ cli.Program) error {
t := root.T
if want, got := "", root.parg1; got != want {
t.Fatalf("want %q, got %q", want, got)
}
return nil
},
Subcommands: map[string]*cli.Command{
"foo": {
Description: "this is foo's description",
Exec: func(prg cli.Program) error {
fmt.Fprintln(prg.Stdout(), "testing foo stdout")
fmt.Fprintln(prg.Stdout(), "testing foo stderr")
return nil
},
},
},
},
args: []string{"test", "bar"},
wantCode: 2,
wantOut: "",
wantErr: `test: command provided but not defined: bar
USAGE:
test [OPTIONS] [COMMAND]
OPTIONS:
-h, -help print help information
COMMANDS:
foo this is foo's description
`,
wantCombined: `test: command provided but not defined: bar
USAGE:
test [OPTIONS] [COMMAND]
OPTIONS:
-h, -help print help information
COMMANDS:
foo this is foo's description
`,
},
{
desc: "subcommand error",
entry: &cli.Command{
Exec: func(_ cli.Program) error {
t := root.T
if want, got := "", root.parg1; got != want {
t.Fatalf("want %q, got %q", want, got)
}
return nil
},
Subcommands: map[string]*cli.Command{
"foo": {
Description: "this is foo's description",
Exec: func(prg cli.Program) error {
fmt.Fprintln(prg.Stdout(), "testing foo stdout")
fmt.Fprintln(prg.Stderr(), "testing foo stderr")
return errors.New("foo has thrown an error")
},
},
},
},
args: []string{"test", "foo"},
wantCode: 1,
wantOut: "testing foo stdout\n",
wantErr: `test: foo has thrown an error
testing foo stderr
`,
wantCombined: `test: foo has thrown an error
testing foo stdout
testing foo stderr
`,
},
{
desc: "custom error code",
entry: &cli.Command{
Exec: func(_ cli.Program) error { return errors.New("foo") },
},
opts: []func(*cli.CLI){
cli.ErrorCode(0xDEADC0DE),
},
args: []string{"test"},
wantCode: 0xDEADC0DE,
wantOut: "",
wantErr: "test: foo\n",
wantCombined: "test: foo\n",
},
{