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flag_test.go
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package cli
import (
"flag"
"fmt"
"io"
"os"
"reflect"
"regexp"
"strings"
"testing"
"time"
)
var boolFlagTests = []struct {
name string
expected string
}{
{"help", "--help\t(default: false)"},
{"h", "-h\t(default: false)"},
}
func resetEnv(env []string) {
for _, e := range env {
fields := strings.SplitN(e, "=", 2)
os.Setenv(fields[0], fields[1])
}
}
func TestBoolFlagHelpOutput(t *testing.T) {
for _, test := range boolFlagTests {
fl := &BoolFlag{Name: test.name}
output := fl.String()
if output != test.expected {
t.Errorf("%q does not match %q", output, test.expected)
}
}
}
func TestBoolFlagApply_SetsAllNames(t *testing.T) {
v := false
fl := BoolFlag{Name: "wat", Aliases: []string{"W", "huh"}, Destination: &v}
set := flag.NewFlagSet("test", 0)
_ = fl.Apply(set)
err := set.Parse([]string{"--wat", "-W", "--huh"})
expect(t, err, nil)
expect(t, v, true)
}
func TestBoolFlagValueFromContext(t *testing.T) {
set := flag.NewFlagSet("test", 0)
set.Bool("trueflag", true, "doc")
set.Bool("falseflag", false, "doc")
ctx := NewContext(nil, set, nil)
tf := &BoolFlag{Name: "trueflag"}
ff := &BoolFlag{Name: "falseflag"}
expect(t, tf.Get(ctx), true)
expect(t, ff.Get(ctx), false)
}
func TestBoolFlagApply_SetsCount(t *testing.T) {
v := false
count := 0
app := &App{
Name: "foo",
Flags: []Flag{
&BoolFlag{Name: "wat", Aliases: []string{"W", "huh"}, Destination: &v, Count: &count},
},
}
err := app.Run([]string{"foo", "--wat", "-W", "--huh"})
if err == nil {
t.Error("Expected error")
} else if es := err.Error(); !strings.Contains(es, "Cannot use two forms of the same flag") {
t.Errorf("Unexpected error %s", es)
}
v = false
count = 0
err = app.Run([]string{"foo", "--wat", "--wat", "--wat"})
expect(t, err, nil)
expect(t, v, true)
expect(t, count, 3)
}
func TestBoolFlagCountFromContext(t *testing.T) {
boolCountTests := []struct {
input []string
expectedVal bool
expectedCount int
}{
{
input: []string{"foo", "-tf"},
expectedVal: true,
expectedCount: 1,
},
{
input: []string{"foo", "-tf", "-tf", "-tf"},
expectedVal: true,
expectedCount: 3,
},
{
input: []string{},
expectedVal: false,
expectedCount: 0,
},
}
for _, bct := range boolCountTests {
tf := &BoolFlag{Name: "tf", Aliases: []string{"w", "huh"}}
app := &App{
Name: "foo",
Flags: []Flag{tf},
Action: func(ctx *Context) error {
expect(t, tf.Get(ctx), bct.expectedVal)
expect(t, ctx.Count("tf"), bct.expectedCount)
expect(t, ctx.Count("w"), bct.expectedCount)
expect(t, ctx.Count("huh"), bct.expectedCount)
return nil
},
}
app.Run(bct.input)
}
}
func TestFlagsFromEnv(t *testing.T) {
newSetFloat64Slice := func(defaults ...float64) Float64Slice {
s := NewFloat64Slice(defaults...)
s.hasBeenSet = false
return *s
}
newSetIntSlice := func(defaults ...int) IntSlice {
s := NewIntSlice(defaults...)
s.hasBeenSet = false
return *s
}
newSetUintSlice := func(defaults ...uint) UintSlice {
s := NewUintSlice(defaults...)
s.hasBeenSet = false
return *s
}
newSetInt64Slice := func(defaults ...int64) Int64Slice {
s := NewInt64Slice(defaults...)
s.hasBeenSet = false
return *s
}
newSetUint64Slice := func(defaults ...uint64) Uint64Slice {
s := NewUint64Slice(defaults...)
s.hasBeenSet = false
return *s
}
newSetStringSlice := func(defaults ...string) StringSlice {
s := NewStringSlice(defaults...)
s.hasBeenSet = false
return *s
}
newSetStringSliceKeepSpace := func(defaults ...string) StringSlice {
s := newSetStringSlice(defaults...)
s.keepSpace = true
return s
}
var flagTests = []struct {
input string
output interface{}
flag Flag
errRegexp string
}{
{"", false, &BoolFlag{Name: "debug", EnvVars: []string{"DEBUG"}}, ""},
{"1", true, &BoolFlag{Name: "debug", EnvVars: []string{"DEBUG"}}, ""},
{"false", false, &BoolFlag{Name: "debug", EnvVars: []string{"DEBUG"}}, ""},
{"foobar", true, &BoolFlag{Name: "debug", EnvVars: []string{"DEBUG"}}, `could not parse "foobar" as bool value from environment variable "DEBUG" for flag debug: .*`},
{"1s", 1 * time.Second, &DurationFlag{Name: "time", EnvVars: []string{"TIME"}}, ""},
{"foobar", false, &DurationFlag{Name: "time", EnvVars: []string{"TIME"}}, `could not parse "foobar" as duration value from environment variable "TIME" for flag time: .*`},
{"1.2", 1.2, &Float64Flag{Name: "seconds", EnvVars: []string{"SECONDS"}}, ""},
{"1", 1.0, &Float64Flag{Name: "seconds", EnvVars: []string{"SECONDS"}}, ""},
{"foobar", 0, &Float64Flag{Name: "seconds", EnvVars: []string{"SECONDS"}}, `could not parse "foobar" as float64 value from environment variable "SECONDS" for flag seconds: .*`},
{"1", int64(1), &Int64Flag{Name: "seconds", EnvVars: []string{"SECONDS"}}, ""},
{"1.2", 0, &Int64Flag{Name: "seconds", EnvVars: []string{"SECONDS"}}, `could not parse "1.2" as int value from environment variable "SECONDS" for flag seconds: .*`},
{"foobar", 0, &Int64Flag{Name: "seconds", EnvVars: []string{"SECONDS"}}, `could not parse "foobar" as int value from environment variable "SECONDS" for flag seconds: .*`},
{"1", 1, &IntFlag{Name: "seconds", EnvVars: []string{"SECONDS"}}, ""},
{"08", 8, &IntFlag{Name: "seconds", EnvVars: []string{"SECONDS"}, Base: 10}, ""},
{"755", 493, &IntFlag{Name: "seconds", EnvVars: []string{"SECONDS"}, Base: 8}, ""},
{"deadBEEF", 3735928559, &IntFlag{Name: "seconds", EnvVars: []string{"SECONDS"}, Base: 16}, ""},
{"08", 0, &IntFlag{Name: "seconds", EnvVars: []string{"SECONDS"}, Base: 0}, `could not parse "08" as int value from environment variable "SECONDS" for flag seconds: .*`},
{"1.2", 0, &IntFlag{Name: "seconds", EnvVars: []string{"SECONDS"}}, `could not parse "1.2" as int value from environment variable "SECONDS" for flag seconds: .*`},
{"foobar", 0, &IntFlag{Name: "seconds", EnvVars: []string{"SECONDS"}}, `could not parse "foobar" as int value from environment variable "SECONDS" for flag seconds: .*`},
{"1.0,2", newSetFloat64Slice(1, 2), &Float64SliceFlag{Name: "seconds", EnvVars: []string{"SECONDS"}}, ""},
{"foobar", newSetFloat64Slice(), &Float64SliceFlag{Name: "seconds", EnvVars: []string{"SECONDS"}}, `could not parse "foobar" as float64 slice value from environment variable "SECONDS" for flag seconds: .*`},
{"1,2", newSetIntSlice(1, 2), &IntSliceFlag{Name: "seconds", EnvVars: []string{"SECONDS"}}, ""},
{"1.2,2", newSetIntSlice(), &IntSliceFlag{Name: "seconds", EnvVars: []string{"SECONDS"}}, `could not parse "1.2,2" as int slice value from environment variable "SECONDS" for flag seconds: .*`},
{"foobar", newSetIntSlice(), &IntSliceFlag{Name: "seconds", EnvVars: []string{"SECONDS"}}, `could not parse "foobar" as int slice value from environment variable "SECONDS" for flag seconds: .*`},
{"1,2", newSetUintSlice(1, 2), &UintSliceFlag{Name: "seconds", EnvVars: []string{"SECONDS"}}, ""},
{"1.2,2", newSetUintSlice(), &UintSliceFlag{Name: "seconds", EnvVars: []string{"SECONDS"}}, `could not parse "1.2,2" as uint slice value from environment variable "SECONDS" for flag seconds: .*`},
{"foobar", newSetUintSlice(), &UintSliceFlag{Name: "seconds", EnvVars: []string{"SECONDS"}}, `could not parse "foobar" as uint slice value from environment variable "SECONDS" for flag seconds: .*`},
{"1,2", newSetInt64Slice(1, 2), &Int64SliceFlag{Name: "seconds", EnvVars: []string{"SECONDS"}}, ""},
{"1.2,2", newSetInt64Slice(), &Int64SliceFlag{Name: "seconds", EnvVars: []string{"SECONDS"}}, `could not parse "1.2,2" as int64 slice value from environment variable "SECONDS" for flag seconds: .*`},
{"foobar", newSetInt64Slice(), &Int64SliceFlag{Name: "seconds", EnvVars: []string{"SECONDS"}}, `could not parse "foobar" as int64 slice value from environment variable "SECONDS" for flag seconds: .*`},
{"1,2", newSetUint64Slice(1, 2), &Uint64SliceFlag{Name: "seconds", EnvVars: []string{"SECONDS"}}, ""},
{"1.2,2", newSetUint64Slice(), &Uint64SliceFlag{Name: "seconds", EnvVars: []string{"SECONDS"}}, `could not parse "1.2,2" as uint64 slice value from environment variable "SECONDS" for flag seconds: .*`},
{"foobar", newSetUint64Slice(), &Uint64SliceFlag{Name: "seconds", EnvVars: []string{"SECONDS"}}, `could not parse "foobar" as uint64 slice value from environment variable "SECONDS" for flag seconds: .*`},
{"foo", "foo", &StringFlag{Name: "name", EnvVars: []string{"NAME"}}, ""},
{"path", "path", &PathFlag{Name: "path", EnvVars: []string{"PATH"}}, ""},
{"foo,bar", newSetStringSlice("foo", "bar"), &StringSliceFlag{Name: "names", EnvVars: []string{"NAMES"}}, ""},
{" space ", newSetStringSliceKeepSpace(" space "), &StringSliceFlag{Name: "names", KeepSpace: true, EnvVars: []string{"NAMES"}}, ""},
{" no space ", newSetStringSlice("no space"), &StringSliceFlag{Name: "names", EnvVars: []string{"NAMES"}}, ""},
{"1", uint(1), &UintFlag{Name: "seconds", EnvVars: []string{"SECONDS"}}, ""},
{"08", uint(8), &UintFlag{Name: "seconds", EnvVars: []string{"SECONDS"}, Base: 10}, ""},
{"755", uint(493), &UintFlag{Name: "seconds", EnvVars: []string{"SECONDS"}, Base: 8}, ""},
{"deadBEEF", uint(3735928559), &UintFlag{Name: "seconds", EnvVars: []string{"SECONDS"}, Base: 16}, ""},
{"08", 0, &UintFlag{Name: "seconds", EnvVars: []string{"SECONDS"}, Base: 0}, `could not parse "08" as uint value from environment variable "SECONDS" for flag seconds: .*`},
{"1.2", 0, &UintFlag{Name: "seconds", EnvVars: []string{"SECONDS"}}, `could not parse "1.2" as uint value from environment variable "SECONDS" for flag seconds: .*`},
{"foobar", 0, &UintFlag{Name: "seconds", EnvVars: []string{"SECONDS"}}, `could not parse "foobar" as uint value from environment variable "SECONDS" for flag seconds: .*`},
{"1", uint64(1), &Uint64Flag{Name: "seconds", EnvVars: []string{"SECONDS"}}, ""},
{"08", uint64(8), &Uint64Flag{Name: "seconds", EnvVars: []string{"SECONDS"}, Base: 10}, ""},
{"755", uint64(493), &Uint64Flag{Name: "seconds", EnvVars: []string{"SECONDS"}, Base: 8}, ""},
{"deadBEEF", uint64(3735928559), &Uint64Flag{Name: "seconds", EnvVars: []string{"SECONDS"}, Base: 16}, ""},
{"08", 0, &Uint64Flag{Name: "seconds", EnvVars: []string{"SECONDS"}, Base: 0}, `could not parse "08" as uint64 value from environment variable "SECONDS" for flag seconds: .*`},
{"1.2", 0, &Uint64Flag{Name: "seconds", EnvVars: []string{"SECONDS"}}, `could not parse "1.2" as uint64 value from environment variable "SECONDS" for flag seconds: .*`},
{"foobar", 0, &Uint64Flag{Name: "seconds", EnvVars: []string{"SECONDS"}}, `could not parse "foobar" as uint64 value from environment variable "SECONDS" for flag seconds: .*`},
{"foo,bar", &Parser{"foo", "bar"}, &GenericFlag{Name: "names", Value: &Parser{}, EnvVars: []string{"NAMES"}}, ""},
}
for i, test := range flagTests {
defer resetEnv(os.Environ())
os.Clearenv()
f, ok := test.flag.(DocGenerationFlag)
if !ok {
t.Errorf("flag %v needs to implement DocGenerationFlag to retrieve env vars", test.flag)
}
envVarSlice := f.GetEnvVars()
_ = os.Setenv(envVarSlice[0], test.input)
a := App{
Flags: []Flag{test.flag},
Action: func(ctx *Context) error {
if !reflect.DeepEqual(ctx.Value(test.flag.Names()[0]), test.output) {
t.Errorf("ex:%01d expected %q to be parsed as %#v, instead was %#v", i, test.input, test.output, ctx.Value(test.flag.Names()[0]))
}
if !f.IsSet() {
t.Errorf("Flag %s not set", f.Names()[0])
}
// check that flag names are returned when set via env as well
if !reflect.DeepEqual(ctx.FlagNames(), test.flag.Names()) {
t.Errorf("Not enough flag names %+v", ctx.FlagNames())
}
return nil
},
}
err := a.Run([]string{"run"})
if test.errRegexp != "" {
if err == nil {
t.Errorf("expected error to match %q, got none", test.errRegexp)
} else {
if matched, _ := regexp.MatchString(test.errRegexp, err.Error()); !matched {
t.Errorf("expected error to match %q, got error %s", test.errRegexp, err)
}
}
} else {
if err != nil && test.errRegexp == "" {
t.Errorf("expected no error got %q", err)
}
}
}
}
type nodocFlag struct {
Flag
Name string
}
func TestFlagStringifying(t *testing.T) {
for _, tc := range []struct {
name string
fl Flag
expected string
}{
{
name: "bool-flag",
fl: &BoolFlag{Name: "vividly"},
expected: "--vividly\t(default: false)",
},
{
name: "bool-flag-with-default-text",
fl: &BoolFlag{Name: "wildly", DefaultText: "scrambled"},
expected: "--wildly\t(default: scrambled)",
},
{
name: "duration-flag",
fl: &DurationFlag{Name: "scream-for"},
expected: "--scream-for value\t(default: 0s)",
},
{
name: "duration-flag-with-default-text",
fl: &DurationFlag{Name: "feels-about", DefaultText: "whimsically"},
expected: "--feels-about value\t(default: whimsically)",
},
{
name: "float64-flag",
fl: &Float64Flag{Name: "arduous"},
expected: "--arduous value\t(default: 0)",
},
{
name: "float64-flag-with-default-text",
fl: &Float64Flag{Name: "filibuster", DefaultText: "42"},
expected: "--filibuster value\t(default: 42)",
},
{
name: "float64-slice-flag",
fl: &Float64SliceFlag{Name: "pizzas"},
expected: "--pizzas value [ --pizzas value ]\t",
},
{
name: "float64-slice-flag-with-default-text",
fl: &Float64SliceFlag{Name: "pepperonis", DefaultText: "shaved"},
expected: "--pepperonis value [ --pepperonis value ]\t(default: shaved)",
},
{
name: "generic-flag",
fl: &GenericFlag{Name: "yogurt"},
expected: "--yogurt value\t",
},
{
name: "generic-flag-with-default-text",
fl: &GenericFlag{Name: "ricotta", DefaultText: "plops"},
expected: "--ricotta value\t(default: plops)",
},
{
name: "int-flag",
fl: &IntFlag{Name: "grubs"},
expected: "--grubs value\t(default: 0)",
},
{
name: "int-flag-with-default-text",
fl: &IntFlag{Name: "poisons", DefaultText: "11ty"},
expected: "--poisons value\t(default: 11ty)",
},
{
name: "int-slice-flag",
fl: &IntSliceFlag{Name: "pencils"},
expected: "--pencils value [ --pencils value ]\t",
},
{
name: "int-slice-flag-with-default-text",
fl: &IntFlag{Name: "pens", DefaultText: "-19"},
expected: "--pens value\t(default: -19)",
},
{
name: "uint-slice-flag",
fl: &UintSliceFlag{Name: "pencils"},
expected: "--pencils value [ --pencils value ]\t",
},
{
name: "uint-slice-flag-with-default-text",
fl: &UintFlag{Name: "pens", DefaultText: "29"},
expected: "--pens value\t(default: 29)",
},
{
name: "int64-flag",
fl: &Int64Flag{Name: "flume"},
expected: "--flume value\t(default: 0)",
},
{
name: "int64-flag-with-default-text",
fl: &Int64Flag{Name: "shattering", DefaultText: "22"},
expected: "--shattering value\t(default: 22)",
},
{
name: "int64-slice-flag",
fl: &Int64SliceFlag{Name: "drawers"},
expected: "--drawers value [ --drawers value ]\t",
},
{
name: "int64-slice-flag-with-default-text",
fl: &Int64SliceFlag{Name: "handles", DefaultText: "-2"},
expected: "--handles value [ --handles value ]\t(default: -2)",
},
{
name: "uint64-slice-flag",
fl: &Uint64SliceFlag{Name: "drawers"},
expected: "--drawers value [ --drawers value ]\t",
},
{
name: "uint64-slice-flag-with-default-text",
fl: &Uint64SliceFlag{Name: "handles", DefaultText: "-2"},
expected: "--handles value [ --handles value ]\t(default: -2)",
},
{
name: "path-flag",
fl: &PathFlag{Name: "soup"},
expected: "--soup value\t",
},
{
name: "path-flag-with-default-text",
fl: &PathFlag{Name: "stew", DefaultText: "charred/beans"},
expected: "--stew value\t(default: charred/beans)",
},
{
name: "string-flag",
fl: &StringFlag{Name: "arf-sound"},
expected: "--arf-sound value\t",
},
{
name: "string-flag-with-default-text",
fl: &StringFlag{Name: "woof-sound", DefaultText: "urp"},
expected: "--woof-sound value\t(default: urp)",
},
{
name: "string-slice-flag",
fl: &StringSliceFlag{Name: "meow-sounds"},
expected: "--meow-sounds value [ --meow-sounds value ]\t",
},
{
name: "string-slice-flag-with-default-text",
fl: &StringSliceFlag{Name: "moo-sounds", DefaultText: "awoo"},
expected: "--moo-sounds value [ --moo-sounds value ]\t(default: awoo)",
},
{
name: "timestamp-flag",
fl: &TimestampFlag{Name: "eating"},
expected: "--eating value\t",
},
{
name: "timestamp-flag-with-default-text",
fl: &TimestampFlag{Name: "sleeping", DefaultText: "earlier"},
expected: "--sleeping value\t(default: earlier)",
},
{
name: "uint-flag",
fl: &UintFlag{Name: "jars"},
expected: "--jars value\t(default: 0)",
},
{
name: "uint-flag-with-default-text",
fl: &UintFlag{Name: "bottles", DefaultText: "99"},
expected: "--bottles value\t(default: 99)",
},
{
name: "uint64-flag",
fl: &Uint64Flag{Name: "cans"},
expected: "--cans value\t(default: 0)",
},
{
name: "uint64-flag-with-default-text",
fl: &UintFlag{Name: "tubes", DefaultText: "13"},
expected: "--tubes value\t(default: 13)",
},
{
name: "nodoc-flag",
fl: &nodocFlag{Name: "scarecrow"},
expected: "",
},
} {
t.Run(tc.name, func(ct *testing.T) {
s := stringifyFlag(tc.fl)
if s != tc.expected {
ct.Errorf("stringified flag %q does not match expected %q", s, tc.expected)
}
})
}
}
var stringFlagTests = []struct {
name string
aliases []string
usage string
value string
expected string
}{
{"foo", nil, "", "", "--foo value\t"},
{"f", nil, "", "", "-f value\t"},
{"f", nil, "The total `foo` desired", "all", "-f foo\tThe total foo desired (default: \"all\")"},
{"test", nil, "", "Something", "--test value\t(default: \"Something\")"},
{"config", []string{"c"}, "Load configuration from `FILE`", "", "--config FILE, -c FILE\tLoad configuration from FILE"},
{"config", []string{"c"}, "Load configuration from `CONFIG`", "config.json", "--config CONFIG, -c CONFIG\tLoad configuration from CONFIG (default: \"config.json\")"},
}
func TestStringFlagHelpOutput(t *testing.T) {
for _, test := range stringFlagTests {
fl := &StringFlag{Name: test.name, Aliases: test.aliases, Usage: test.usage, Value: test.value}
// create a tmp flagset
tfs := flag.NewFlagSet("test", 0)
fl.Apply(tfs)
output := fl.String()
if output != test.expected {
t.Errorf("%q does not match %q", output, test.expected)
}
}
}
func TestStringFlagDefaultText(t *testing.T) {
fl := &StringFlag{Name: "foo", Aliases: nil, Usage: "amount of `foo` requested", Value: "none", DefaultText: "all of it"}
expected := "--foo foo\tamount of foo requested (default: all of it)"
output := fl.String()
if output != expected {
t.Errorf("%q does not match %q", output, expected)
}
}
func TestStringFlagWithEnvVarHelpOutput(t *testing.T) {
defer resetEnv(os.Environ())
os.Clearenv()
_ = os.Setenv("APP_FOO", "derp")
for _, test := range stringFlagTests {
fl := &StringFlag{Name: test.name, Aliases: test.aliases, Value: test.value, EnvVars: []string{"APP_FOO"}}
output := fl.String()
expectedSuffix := withEnvHint([]string{"APP_FOO"}, "")
if !strings.HasSuffix(output, expectedSuffix) {
t.Errorf("%s does not end with"+expectedSuffix, output)
}
}
}
var _ = []struct {
name string
aliases []string
usage string
value string
prefixer FlagNamePrefixFunc
expected string
}{
{name: "foo", usage: "", value: "", prefixer: func(a []string, b string) string {
return fmt.Sprintf("name: %s, ph: %s", a, b)
}, expected: "name: foo, ph: value\t"},
{name: "f", usage: "", value: "", prefixer: func(a []string, b string) string {
return fmt.Sprintf("name: %s, ph: %s", a, b)
}, expected: "name: f, ph: value\t"},
{name: "f", usage: "The total `foo` desired", value: "all", prefixer: func(a []string, b string) string {
return fmt.Sprintf("name: %s, ph: %s", a, b)
}, expected: "name: f, ph: foo\tThe total foo desired (default: \"all\")"},
{name: "test", usage: "", value: "Something", prefixer: func(a []string, b string) string {
return fmt.Sprintf("name: %s, ph: %s", a, b)
}, expected: "name: test, ph: value\t(default: \"Something\")"},
{name: "config", aliases: []string{"c"}, usage: "Load configuration from `FILE`", value: "", prefixer: func(a []string, b string) string {
return fmt.Sprintf("name: %s, ph: %s", a, b)
}, expected: "name: config,c, ph: FILE\tLoad configuration from FILE"},
{name: "config", aliases: []string{"c"}, usage: "Load configuration from `CONFIG`", value: "config.json", prefixer: func(a []string, b string) string {
return fmt.Sprintf("name: %s, ph: %s", a, b)
}, expected: "name: config,c, ph: CONFIG\tLoad configuration from CONFIG (default: \"config.json\")"},
}
func TestStringFlagApply_SetsAllNames(t *testing.T) {
v := "mmm"
fl := StringFlag{Name: "hay", Aliases: []string{"H", "hayyy"}, Destination: &v}
set := flag.NewFlagSet("test", 0)
_ = fl.Apply(set)
err := set.Parse([]string{"--hay", "u", "-H", "yuu", "--hayyy", "YUUUU"})
expect(t, err, nil)
expect(t, v, "YUUUU")
}
func TestStringFlagValueFromContext(t *testing.T) {
set := flag.NewFlagSet("test", 0)
set.String("myflag", "foobar", "doc")
ctx := NewContext(nil, set, nil)
f := &StringFlag{Name: "myflag"}
expect(t, f.Get(ctx), "foobar")
}
var pathFlagTests = []struct {
name string
aliases []string
usage string
value string
expected string
}{
{"f", nil, "", "", "-f value\t"},
{"f", nil, "Path is the `path` of file", "/path/to/file", "-f path\tPath is the path of file (default: \"/path/to/file\")"},
}
func TestPathFlagHelpOutput(t *testing.T) {
for _, test := range pathFlagTests {
fl := &PathFlag{Name: test.name, Aliases: test.aliases, Usage: test.usage, Value: test.value}
// create a temporary flag set to apply
tfs := flag.NewFlagSet("test", 0)
fl.Apply(tfs)
output := fl.String()
if output != test.expected {
t.Errorf("%q does not match %q", output, test.expected)
}
}
}
func TestPathFlagWithEnvVarHelpOutput(t *testing.T) {
defer resetEnv(os.Environ())
os.Clearenv()
_ = os.Setenv("APP_PATH", "/path/to/file")
for _, test := range pathFlagTests {
fl := &PathFlag{Name: test.name, Aliases: test.aliases, Value: test.value, EnvVars: []string{"APP_PATH"}}
output := fl.String()
expectedSuffix := withEnvHint([]string{"APP_PATH"}, "")
if !strings.HasSuffix(output, expectedSuffix) {
t.Errorf("%s does not end with"+expectedSuffix, output)
}
}
}
func TestPathFlagApply_SetsAllNames(t *testing.T) {
v := "mmm"
fl := PathFlag{Name: "path", Aliases: []string{"p", "PATH"}, Destination: &v}
set := flag.NewFlagSet("test", 0)
_ = fl.Apply(set)
err := set.Parse([]string{"--path", "/path/to/file/path", "-p", "/path/to/file/p", "--PATH", "/path/to/file/PATH"})
expect(t, err, nil)
expect(t, v, "/path/to/file/PATH")
}
func TestPathFlagValueFromContext(t *testing.T) {
set := flag.NewFlagSet("test", 0)
set.String("myflag", "/my/path", "doc")
ctx := NewContext(nil, set, nil)
f := &PathFlag{Name: "myflag"}
expect(t, f.Get(ctx), "/my/path")
}
var _ = []struct {
name string
env string
hinter FlagEnvHintFunc
expected string
}{
{"foo", "", func(a []string, b string) string {
return fmt.Sprintf("env: %s, str: %s", a, b)
}, "env: , str: --foo value\t"},
{"f", "", func(a []string, b string) string {
return fmt.Sprintf("env: %s, str: %s", a, b)
}, "env: , str: -f value\t"},
{"foo", "ENV_VAR", func(a []string, b string) string {
return fmt.Sprintf("env: %s, str: %s", a, b)
}, "env: ENV_VAR, str: --foo value\t"},
{"f", "ENV_VAR", func(a []string, b string) string {
return fmt.Sprintf("env: %s, str: %s", a, b)
}, "env: ENV_VAR, str: -f value\t"},
}
//func TestFlagEnvHinter(t *testing.T) {
// defer func() {
// FlagEnvHinter = withEnvHint
// }()
//
// for _, test := range envHintFlagTests {
// FlagEnvHinter = test.hinter
// fl := StringFlag{Name: test.name, EnvVars: []string{test.env}}
// output := fl.String()
// if output != test.expected {
// t.Errorf("%q does not match %q", output, test.expected)
// }
// }
//}
var stringSliceFlagTests = []struct {
name string
aliases []string
value *StringSlice
expected string
}{
{"foo", nil, NewStringSlice(""), "--foo value [ --foo value ]\t"},
{"f", nil, NewStringSlice(""), "-f value [ -f value ]\t"},
{"f", nil, NewStringSlice("Lipstick"), "-f value [ -f value ]\t(default: \"Lipstick\")"},
{"test", nil, NewStringSlice("Something"), "--test value [ --test value ]\t(default: \"Something\")"},
{"dee", []string{"d"}, NewStringSlice("Inka", "Dinka", "dooo"), "--dee value, -d value [ --dee value, -d value ]\t(default: \"Inka\", \"Dinka\", \"dooo\")"},
}
func TestStringSliceFlagHelpOutput(t *testing.T) {
for _, test := range stringSliceFlagTests {
f := &StringSliceFlag{Name: test.name, Aliases: test.aliases, Value: test.value}
output := f.String()
if output != test.expected {
t.Errorf("%q does not match %q", output, test.expected)
}
}
}
func TestStringSliceFlagWithEnvVarHelpOutput(t *testing.T) {
defer resetEnv(os.Environ())
os.Clearenv()
_ = os.Setenv("APP_QWWX", "11,4")
for _, test := range stringSliceFlagTests {
fl := &StringSliceFlag{Name: test.name, Aliases: test.aliases, Value: test.value, EnvVars: []string{"APP_QWWX"}}
output := fl.String()
expectedSuffix := withEnvHint([]string{"APP_QWWX"}, "")
if !strings.HasSuffix(output, expectedSuffix) {
t.Errorf("%q does not end with"+expectedSuffix, output)
}
}
}
func TestStringSliceFlagApply_SetsAllNames(t *testing.T) {
fl := StringSliceFlag{Name: "goat", Aliases: []string{"G", "gooots"}}
set := flag.NewFlagSet("test", 0)
_ = fl.Apply(set)
err := set.Parse([]string{"--goat", "aaa", "-G", "bbb", "--gooots", "eeeee"})
expect(t, err, nil)
}
func TestStringSliceFlagApply_UsesEnvValues_noDefault(t *testing.T) {
defer resetEnv(os.Environ())
os.Clearenv()
_ = os.Setenv("MY_GOAT", "vincent van goat,scape goat")
var val StringSlice
fl := StringSliceFlag{Name: "goat", EnvVars: []string{"MY_GOAT"}, Value: &val}
set := flag.NewFlagSet("test", 0)
_ = fl.Apply(set)
err := set.Parse(nil)
expect(t, err, nil)
expect(t, val.Value(), []string(nil))
expect(t, set.Lookup("goat").Value.(*StringSlice).Value(), []string{"vincent van goat", "scape goat"})
}
func TestStringSliceFlagApply_UsesEnvValues_withDefault(t *testing.T) {
defer resetEnv(os.Environ())
os.Clearenv()
_ = os.Setenv("MY_GOAT", "vincent van goat,scape goat")
val := NewStringSlice(`some default`, `values here`)
fl := StringSliceFlag{Name: "goat", EnvVars: []string{"MY_GOAT"}, Value: val}
set := flag.NewFlagSet("test", 0)
_ = fl.Apply(set)
err := set.Parse(nil)
expect(t, err, nil)
expect(t, val.Value(), []string{`some default`, `values here`})
expect(t, set.Lookup("goat").Value.(*StringSlice).Value(), []string{"vincent van goat", "scape goat"})
}
func TestStringSliceFlagApply_DefaultValueWithDestination(t *testing.T) {
defValue := []string{"UA", "US"}
fl := StringSliceFlag{Name: "country", Value: NewStringSlice(defValue...), Destination: NewStringSlice("CA")}
set := flag.NewFlagSet("test", 0)
_ = fl.Apply(set)
err := set.Parse([]string{})
expect(t, err, nil)
expect(t, defValue, fl.Destination.Value())
}
func TestStringSliceFlagValueFromContext(t *testing.T) {
set := flag.NewFlagSet("test", 0)
set.Var(NewStringSlice("a", "b", "c"), "myflag", "doc")
ctx := NewContext(nil, set, nil)
f := &StringSliceFlag{Name: "myflag"}
expect(t, f.Get(ctx), []string{"a", "b", "c"})
}
func TestStringSliceFlag_MatchStringFlagBehavior(t *testing.T) {
t.Parallel()
values := []string{
"asd",
"123",
" asd ", // leading and tailing space
}
for testNum, value := range values {
value := value
t.Run(fmt.Sprintf("%d", testNum), func(t *testing.T) {
t.Parallel()
app := App{
Flags: []Flag{
&StringFlag{Name: "string"},
&StringSliceFlag{Name: "slice", KeepSpace: true},
},
Action: func(ctx *Context) error {
f1, f2 := ctx.String("string"), ctx.StringSlice("slice")
if l := len(f2); l != 1 {
t.Fatalf("StringSliceFlag should result in exactly one value, got %d", l)
}
v1, v2 := f1, f2[0]
if v1 != v2 {
t.Errorf("Expected StringSliceFlag to parse the same value as StringFlag (%q), got %q", v1, v2)
}
return nil
},
}
if err := app.Run([]string{"", "--string", value, "--slice", value}); err != nil {
t.Errorf("app run error: %s", err)
}
})
}
}
func TestStringSliceFlag_TrimSpace(t *testing.T) {
t.Parallel()
tests := []struct {
in, out string
}{
{" asd", "asd"},
{"123 ", "123"},
{" asd ", "asd"},
}
for testNum, tt := range tests {
tt := tt
t.Run(fmt.Sprintf("%d", testNum), func(t *testing.T) {
t.Parallel()
app := App{
Flags: []Flag{
&StringSliceFlag{Name: "trim"},
&StringSliceFlag{Name: "no-trim", KeepSpace: true},
},
Action: func(ctx *Context) error {
flagTrim, flagNoTrim := ctx.StringSlice("trim"), ctx.StringSlice("no-trim")
if l := len(flagTrim); l != 1 {
t.Fatalf("slice flag 'trim' should result in exactly one value, got %d", l)
}
if l := len(flagNoTrim); l != 1 {
t.Fatalf("slice flag 'no-trim' should result in exactly one value, got %d", l)
}
if v := flagTrim[0]; v != tt.out {
t.Errorf("Expected trimmed value %q, got %q", tt.out, v)
}
if v := flagNoTrim[0]; v != tt.in {
t.Errorf("Expected no trimmed value%q, got %q", tt.out, v)
}
return nil
},
}
if err := app.Run([]string{"", "--trim", tt.in, "--no-trim", tt.in}); err != nil {
t.Errorf("app run error: %s", err)
}
})
}
}
var intFlagTests = []struct {
name string
expected string
}{
{"hats", "--hats value\t(default: 9)"},
{"H", "-H value\t(default: 9)"},
}
func TestIntFlagHelpOutput(t *testing.T) {
for _, test := range intFlagTests {
fl := &IntFlag{Name: test.name, Value: 9}
// create a temporary flag set to apply
tfs := flag.NewFlagSet("test", 0)
fl.Apply(tfs)
output := fl.String()
if output != test.expected {
t.Errorf("%s does not match %s", output, test.expected)
}
}
}
func TestIntFlagWithEnvVarHelpOutput(t *testing.T) {
defer resetEnv(os.Environ())
os.Clearenv()
_ = os.Setenv("APP_BAR", "2")
for _, test := range intFlagTests {
fl := &IntFlag{Name: test.name, EnvVars: []string{"APP_BAR"}}
output := fl.String()
expectedSuffix := withEnvHint([]string{"APP_BAR"}, "")
if !strings.HasSuffix(output, expectedSuffix) {
t.Errorf("%s does not end with"+expectedSuffix, output)
}
}
}
func TestIntFlagApply_SetsAllNames(t *testing.T) {
v := 3
fl := IntFlag{Name: "banana", Aliases: []string{"B", "banannanana"}, Destination: &v}
set := flag.NewFlagSet("test", 0)
_ = fl.Apply(set)
err := set.Parse([]string{"--banana", "1", "-B", "2", "--banannanana", "5"})
expect(t, err, nil)
expect(t, v, 5)
}
func TestIntFlagValueFromContext(t *testing.T) {
set := flag.NewFlagSet("test", 0)
set.Int("myflag", 42, "doc")
ctx := NewContext(nil, set, nil)
f := &IntFlag{Name: "myflag"}
expect(t, f.Get(ctx), 42)
}
var int64FlagTests = []struct {
name string
expected string
}{
{"hats", "--hats value\t(default: 8589934592)"},
{"H", "-H value\t(default: 8589934592)"},
}
func TestInt64FlagHelpOutput(t *testing.T) {
for _, test := range int64FlagTests {
fl := Int64Flag{Name: test.name, Value: 8589934592}
// create a temporary flag set to apply
tfs := flag.NewFlagSet("test", 0)
fl.Apply(tfs)
output := fl.String()
if output != test.expected {
t.Errorf("%s does not match %s", output, test.expected)
}
}
}
func TestInt64FlagWithEnvVarHelpOutput(t *testing.T) {
defer resetEnv(os.Environ())
os.Clearenv()
_ = os.Setenv("APP_BAR", "2")
for _, test := range int64FlagTests {
fl := IntFlag{Name: test.name, EnvVars: []string{"APP_BAR"}}
output := fl.String()
expectedSuffix := withEnvHint([]string{"APP_BAR"}, "")
if !strings.HasSuffix(output, expectedSuffix) {
t.Errorf("%s does not end with"+expectedSuffix, output)
}
}
}
func TestInt64FlagValueFromContext(t *testing.T) {
set := flag.NewFlagSet("test", 0)
set.Int64("myflag", 42, "doc")
ctx := NewContext(nil, set, nil)
f := &Int64Flag{Name: "myflag"}
expect(t, f.Get(ctx), int64(42))
}
var uintFlagTests = []struct {
name string
expected string
}{
{"nerfs", "--nerfs value\t(default: 41)"},
{"N", "-N value\t(default: 41)"},
}
func TestUintFlagHelpOutput(t *testing.T) {
for _, test := range uintFlagTests {
fl := UintFlag{Name: test.name, Value: 41}
// create a temporary flag set to apply
tfs := flag.NewFlagSet("test", 0)
fl.Apply(tfs)
output := fl.String()
if output != test.expected {
t.Errorf("%s does not match %s", output, test.expected)