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spf13--viper/viper_test.go
Jason Lee 44bde863fa handle int slice as well
2024-01-03 14:10:52 +08:00

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// Copyright © 2014 Steve Francia <spf@spf13.com>.
//
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
package viper
import (
"bytes"
"encoding/json"
"io"
"os"
"os/exec"
"path"
"path/filepath"
"reflect"
"runtime"
"strings"
"sync"
"testing"
"time"
"github.com/fsnotify/fsnotify"
"github.com/mitchellh/mapstructure"
"github.com/spf13/afero"
"github.com/spf13/cast"
"github.com/spf13/pflag"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/spf13/viper/internal/features"
"github.com/spf13/viper/internal/testutil"
)
// var yamlExample = []byte(`Hacker: true
// name: steve
// hobbies:
// - skateboarding
// - snowboarding
// - go
// clothing:
// jacket: leather
// trousers: denim
// pants:
// size: large
// age: 35
// eyes : brown
// beard: true
// `)
var yamlExampleWithExtras = []byte(`Existing: true
Bogus: true
`)
type testUnmarshalExtra struct {
Existing bool
}
var tomlExample = []byte(`
title = "TOML Example"
[owner]
organization = "MongoDB"
Bio = "MongoDB Chief Developer Advocate & Hacker at Large"
dob = 1979-05-27T07:32:00Z # First class dates? Why not?`)
var dotenvExample = []byte(`
TITLE_DOTENV="DotEnv Example"
TYPE_DOTENV=donut
NAME_DOTENV=Cake`)
var jsonExample = []byte(`{
"id": "0001",
"type": "donut",
"name": "Cake",
"ppu": 0.55,
"batters": {
"batter": [
{ "type": "Regular" },
{ "type": "Chocolate" },
{ "type": "Blueberry" },
{ "type": "Devil's Food" }
]
}
}`)
var hclExample = []byte(`
id = "0001"
type = "donut"
name = "Cake"
ppu = 0.55
foos {
foo {
key = 1
}
foo {
key = 2
}
foo {
key = 3
}
foo {
key = 4
}
}`)
var propertiesExample = []byte(`
p_id: 0001
p_type: donut
p_name: Cake
p_ppu: 0.55
p_batters.batter.type: Regular
`)
var remoteExample = []byte(`{
"id":"0002",
"type":"cronut",
"newkey":"remote"
}`)
var iniExample = []byte(`; Package name
NAME = ini
; Package version
VERSION = v1
; Package import path
IMPORT_PATH = gopkg.in/%(NAME)s.%(VERSION)s
# Information about package author
# Bio can be written in multiple lines.
[author]
NAME = Unknown ; Succeeding comment
E-MAIL = fake@localhost
GITHUB = https://github.com/%(NAME)s
BIO = """Gopher.
Coding addict.
Good man.
""" # Succeeding comment`)
func initConfigs() {
Reset()
var r io.Reader
SetConfigType("yaml")
r = bytes.NewReader(yamlExample)
unmarshalReader(r, v.config)
SetConfigType("json")
r = bytes.NewReader(jsonExample)
unmarshalReader(r, v.config)
SetConfigType("hcl")
r = bytes.NewReader(hclExample)
unmarshalReader(r, v.config)
SetConfigType("properties")
r = bytes.NewReader(propertiesExample)
unmarshalReader(r, v.config)
SetConfigType("toml")
r = bytes.NewReader(tomlExample)
unmarshalReader(r, v.config)
SetConfigType("env")
r = bytes.NewReader(dotenvExample)
unmarshalReader(r, v.config)
SetConfigType("json")
remote := bytes.NewReader(remoteExample)
unmarshalReader(remote, v.kvstore)
SetConfigType("ini")
r = bytes.NewReader(iniExample)
unmarshalReader(r, v.config)
}
func initConfig(typ, config string) {
Reset()
SetConfigType(typ)
r := strings.NewReader(config)
if err := unmarshalReader(r, v.config); err != nil {
panic(err)
}
}
func initYAML() {
initConfig("yaml", string(yamlExample))
}
func initJSON() {
Reset()
SetConfigType("json")
r := bytes.NewReader(jsonExample)
unmarshalReader(r, v.config)
}
func initProperties() {
Reset()
SetConfigType("properties")
r := bytes.NewReader(propertiesExample)
unmarshalReader(r, v.config)
}
func initTOML() {
Reset()
SetConfigType("toml")
r := bytes.NewReader(tomlExample)
unmarshalReader(r, v.config)
}
func initDotEnv() {
Reset()
SetConfigType("env")
r := bytes.NewReader(dotenvExample)
unmarshalReader(r, v.config)
}
func initHcl() {
Reset()
SetConfigType("hcl")
r := bytes.NewReader(hclExample)
unmarshalReader(r, v.config)
}
func initIni() {
Reset()
SetConfigType("ini")
r := bytes.NewReader(iniExample)
unmarshalReader(r, v.config)
}
// initDirs makes directories for testing.
func initDirs(t *testing.T) (string, string) {
var (
testDirs = []string{`a a`, `b`, `C_`}
config = `improbable`
)
if runtime.GOOS != "windows" {
testDirs = append(testDirs, `d\d`)
}
root := t.TempDir()
for _, dir := range testDirs {
innerDir := filepath.Join(root, dir)
err := os.Mkdir(innerDir, 0o750)
require.NoError(t, err)
err = os.WriteFile(
filepath.Join(innerDir, config+".toml"),
[]byte(`key = "value is `+dir+`"`+"\n"),
0o640)
require.NoError(t, err)
}
return root, config
}
// stubs for PFlag Values.
type stringValue string
func newStringValue(val string, p *string) *stringValue {
*p = val
return (*stringValue)(p)
}
func (s *stringValue) Set(val string) error {
*s = stringValue(val)
return nil
}
func (s *stringValue) Type() string {
return "string"
}
func (s *stringValue) String() string {
return string(*s)
}
func TestGetConfigFile(t *testing.T) {
t.Run("config file set", func(t *testing.T) {
fs := afero.NewMemMapFs()
err := fs.Mkdir(testutil.AbsFilePath(t, "/etc/viper"), 0o777)
require.NoError(t, err)
_, err = fs.Create(testutil.AbsFilePath(t, "/etc/viper/config.yaml"))
require.NoError(t, err)
v := New()
v.SetFs(fs)
v.AddConfigPath("/etc/viper")
v.SetConfigFile(testutil.AbsFilePath(t, "/etc/viper/config.yaml"))
filename, err := v.getConfigFile()
assert.Equal(t, testutil.AbsFilePath(t, "/etc/viper/config.yaml"), filename)
assert.NoError(t, err)
})
t.Run("find file", func(t *testing.T) {
fs := afero.NewMemMapFs()
err := fs.Mkdir(testutil.AbsFilePath(t, "/etc/viper"), 0o777)
require.NoError(t, err)
_, err = fs.Create(testutil.AbsFilePath(t, "/etc/viper/config.yaml"))
require.NoError(t, err)
v := New()
v.SetFs(fs)
v.AddConfigPath("/etc/viper")
filename, err := v.getConfigFile()
assert.Equal(t, testutil.AbsFilePath(t, "/etc/viper/config.yaml"), filename)
assert.NoError(t, err)
})
t.Run("find files only", func(t *testing.T) {
fs := afero.NewMemMapFs()
err := fs.Mkdir(testutil.AbsFilePath(t, "/etc/config"), 0o777)
require.NoError(t, err)
_, err = fs.Create(testutil.AbsFilePath(t, "/etc/config/config.yaml"))
require.NoError(t, err)
v := New()
v.SetFs(fs)
v.AddConfigPath("/etc")
v.AddConfigPath("/etc/config")
filename, err := v.getConfigFile()
assert.Equal(t, testutil.AbsFilePath(t, "/etc/config/config.yaml"), filename)
assert.NoError(t, err)
})
t.Run("precedence", func(t *testing.T) {
fs := afero.NewMemMapFs()
err := fs.Mkdir(testutil.AbsFilePath(t, "/home/viper"), 0o777)
require.NoError(t, err)
_, err = fs.Create(testutil.AbsFilePath(t, "/home/viper/config.zml"))
require.NoError(t, err)
err = fs.Mkdir(testutil.AbsFilePath(t, "/etc/viper"), 0o777)
require.NoError(t, err)
_, err = fs.Create(testutil.AbsFilePath(t, "/etc/viper/config.bml"))
require.NoError(t, err)
err = fs.Mkdir(testutil.AbsFilePath(t, "/var/viper"), 0o777)
require.NoError(t, err)
_, err = fs.Create(testutil.AbsFilePath(t, "/var/viper/config.yaml"))
require.NoError(t, err)
v := New()
v.SetFs(fs)
v.AddConfigPath("/home/viper")
v.AddConfigPath("/etc/viper")
v.AddConfigPath("/var/viper")
filename, err := v.getConfigFile()
assert.Equal(t, testutil.AbsFilePath(t, "/var/viper/config.yaml"), filename)
assert.NoError(t, err)
})
t.Run("without extension", func(t *testing.T) {
fs := afero.NewMemMapFs()
err := fs.Mkdir(testutil.AbsFilePath(t, "/etc/viper"), 0o777)
require.NoError(t, err)
_, err = fs.Create(testutil.AbsFilePath(t, "/etc/viper/.dotfilenoext"))
require.NoError(t, err)
v := New()
v.SetFs(fs)
v.AddConfigPath("/etc/viper")
v.SetConfigName(".dotfilenoext")
v.SetConfigType("yaml")
filename, err := v.getConfigFile()
assert.Equal(t, testutil.AbsFilePath(t, "/etc/viper/.dotfilenoext"), filename)
assert.NoError(t, err)
})
t.Run("without extension and config type", func(t *testing.T) {
fs := afero.NewMemMapFs()
err := fs.Mkdir(testutil.AbsFilePath(t, "/etc/viper"), 0o777)
require.NoError(t, err)
_, err = fs.Create(testutil.AbsFilePath(t, "/etc/viper/.dotfilenoext"))
require.NoError(t, err)
v := New()
v.SetFs(fs)
v.AddConfigPath("/etc/viper")
v.SetConfigName(".dotfilenoext")
_, err = v.getConfigFile()
// unless config type is set, files without extension
// are not considered
assert.Error(t, err)
})
}
func TestReadInConfig(t *testing.T) {
t.Run("config file set", func(t *testing.T) {
fs := afero.NewMemMapFs()
err := fs.Mkdir("/etc/viper", 0o777)
require.NoError(t, err)
file, err := fs.Create(testutil.AbsFilePath(t, "/etc/viper/config.yaml"))
require.NoError(t, err)
_, err = file.WriteString(`key: value`)
require.NoError(t, err)
file.Close()
v := New()
v.SetFs(fs)
v.SetConfigFile(testutil.AbsFilePath(t, "/etc/viper/config.yaml"))
err = v.ReadInConfig()
require.NoError(t, err)
assert.Equal(t, "value", v.Get("key"))
})
t.Run("find file", func(t *testing.T) {
fs := afero.NewMemMapFs()
err := fs.Mkdir(testutil.AbsFilePath(t, "/etc/viper"), 0o777)
require.NoError(t, err)
file, err := fs.Create(testutil.AbsFilePath(t, "/etc/viper/config.yaml"))
require.NoError(t, err)
_, err = file.WriteString(`key: value`)
require.NoError(t, err)
file.Close()
v := New()
v.SetFs(fs)
v.AddConfigPath("/etc/viper")
err = v.ReadInConfig()
require.NoError(t, err)
assert.Equal(t, "value", v.Get("key"))
})
}
func TestDefault(t *testing.T) {
Reset()
SetDefault("age", 45)
assert.Equal(t, 45, Get("age"))
SetDefault("clothing.jacket", "slacks")
assert.Equal(t, "slacks", Get("clothing.jacket"))
SetConfigType("yaml")
err := ReadConfig(bytes.NewBuffer(yamlExample))
assert.NoError(t, err)
assert.Equal(t, "leather", Get("clothing.jacket"))
}
func TestUnmarshaling(t *testing.T) {
Reset()
SetConfigType("yaml")
r := bytes.NewReader(yamlExample)
unmarshalReader(r, v.config)
assert.True(t, InConfig("name"))
assert.True(t, InConfig("clothing.jacket"))
assert.False(t, InConfig("state"))
assert.False(t, InConfig("clothing.hat"))
assert.Equal(t, "steve", Get("name"))
assert.Equal(t, []any{"skateboarding", "snowboarding", "go"}, Get("hobbies"))
assert.Equal(t, map[string]any{"jacket": "leather", "trousers": "denim", "pants": map[string]any{"size": "large"}}, Get("clothing"))
assert.Equal(t, 35, Get("age"))
}
func TestUnmarshalExact(t *testing.T) {
vip := New()
target := &testUnmarshalExtra{}
vip.SetConfigType("yaml")
r := bytes.NewReader(yamlExampleWithExtras)
vip.ReadConfig(r)
err := vip.UnmarshalExact(target)
assert.Error(t, err, "UnmarshalExact should error when populating a struct from a conf that contains unused fields")
}
func TestOverrides(t *testing.T) {
Set("age", 40)
assert.Equal(t, 40, Get("age"))
}
func TestDefaultPost(t *testing.T) {
assert.NotEqual(t, "NYC", Get("state"))
SetDefault("state", "NYC")
assert.Equal(t, "NYC", Get("state"))
}
func TestAliases(t *testing.T) {
initConfigs()
Set("age", 40)
RegisterAlias("years", "age")
assert.Equal(t, 40, Get("years"))
Set("years", 45)
assert.Equal(t, 45, Get("age"))
}
func TestAliasInConfigFile(t *testing.T) {
initConfigs()
// the config file specifies "beard". If we make this an alias for
// "hasbeard", we still want the old config file to work with beard.
RegisterAlias("beard", "hasbeard")
assert.Equal(t, true, Get("hasbeard"))
Set("hasbeard", false)
assert.Equal(t, false, Get("beard"))
}
func TestYML(t *testing.T) {
initYAML()
assert.Equal(t, "steve", Get("name"))
}
func TestJSON(t *testing.T) {
initJSON()
assert.Equal(t, "0001", Get("id"))
}
func TestProperties(t *testing.T) {
initProperties()
assert.Equal(t, "0001", Get("p_id"))
}
func TestTOML(t *testing.T) {
initTOML()
assert.Equal(t, "TOML Example", Get("title"))
}
func TestDotEnv(t *testing.T) {
initDotEnv()
assert.Equal(t, "DotEnv Example", Get("title_dotenv"))
}
func TestHCL(t *testing.T) {
initHcl()
assert.Equal(t, "0001", Get("id"))
assert.Equal(t, 0.55, Get("ppu"))
assert.Equal(t, "donut", Get("type"))
assert.Equal(t, "Cake", Get("name"))
Set("id", "0002")
assert.Equal(t, "0002", Get("id"))
assert.NotEqual(t, "cronut", Get("type"))
}
func TestIni(t *testing.T) {
initIni()
assert.Equal(t, "ini", Get("default.name"))
}
func TestRemotePrecedence(t *testing.T) {
initJSON()
remote := bytes.NewReader(remoteExample)
assert.Equal(t, "0001", Get("id"))
unmarshalReader(remote, v.kvstore)
assert.Equal(t, "0001", Get("id"))
assert.NotEqual(t, "cronut", Get("type"))
assert.Equal(t, "remote", Get("newkey"))
Set("newkey", "newvalue")
assert.NotEqual(t, "remote", Get("newkey"))
assert.Equal(t, "newvalue", Get("newkey"))
Set("newkey", "remote")
}
func TestEnv(t *testing.T) {
initJSON()
BindEnv("id")
BindEnv("f", "FOOD", "OLD_FOOD")
t.Setenv("ID", "13")
t.Setenv("FOOD", "apple")
t.Setenv("OLD_FOOD", "banana")
t.Setenv("NAME", "crunk")
assert.Equal(t, "13", Get("id"))
assert.Equal(t, "apple", Get("f"))
assert.Equal(t, "Cake", Get("name"))
AutomaticEnv()
assert.Equal(t, "crunk", Get("name"))
}
func TestMultipleEnv(t *testing.T) {
initJSON()
BindEnv("f", "FOOD", "OLD_FOOD")
t.Setenv("OLD_FOOD", "banana")
assert.Equal(t, "banana", Get("f"))
}
func TestEmptyEnv(t *testing.T) {
initJSON()
BindEnv("type") // Empty environment variable
BindEnv("name") // Bound, but not set environment variable
t.Setenv("TYPE", "")
assert.Equal(t, "donut", Get("type"))
assert.Equal(t, "Cake", Get("name"))
}
func TestEmptyEnv_Allowed(t *testing.T) {
initJSON()
AllowEmptyEnv(true)
BindEnv("type") // Empty environment variable
BindEnv("name") // Bound, but not set environment variable
t.Setenv("TYPE", "")
assert.Equal(t, "", Get("type"))
assert.Equal(t, "Cake", Get("name"))
}
func TestEnvPrefix(t *testing.T) {
initJSON()
SetEnvPrefix("foo") // will be uppercased automatically
BindEnv("id")
BindEnv("f", "FOOD") // not using prefix
t.Setenv("FOO_ID", "13")
t.Setenv("FOOD", "apple")
t.Setenv("FOO_NAME", "crunk")
assert.Equal(t, "13", Get("id"))
assert.Equal(t, "apple", Get("f"))
assert.Equal(t, "Cake", Get("name"))
AutomaticEnv()
assert.Equal(t, "crunk", Get("name"))
}
func TestAutoEnv(t *testing.T) {
Reset()
AutomaticEnv()
t.Setenv("FOO_BAR", "13")
assert.Equal(t, "13", Get("foo_bar"))
}
func TestAutoEnvWithPrefix(t *testing.T) {
Reset()
AutomaticEnv()
SetEnvPrefix("Baz")
t.Setenv("BAZ_BAR", "13")
assert.Equal(t, "13", Get("bar"))
}
func TestSetEnvKeyReplacer(t *testing.T) {
Reset()
AutomaticEnv()
t.Setenv("REFRESH_INTERVAL", "30s")
replacer := strings.NewReplacer("-", "_")
SetEnvKeyReplacer(replacer)
assert.Equal(t, "30s", Get("refresh-interval"))
}
func TestEnvKeyReplacer(t *testing.T) {
v := NewWithOptions(EnvKeyReplacer(strings.NewReplacer("-", "_")))
v.AutomaticEnv()
t.Setenv("REFRESH_INTERVAL", "30s")
assert.Equal(t, "30s", v.Get("refresh-interval"))
}
func TestEnvSubConfig(t *testing.T) {
initYAML()
v.AutomaticEnv()
v.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
t.Setenv("CLOTHING_PANTS_SIZE", "small")
subv := v.Sub("clothing").Sub("pants")
assert.Equal(t, "small", subv.Get("size"))
// again with EnvPrefix
v.SetEnvPrefix("foo") // will be uppercased automatically
subWithPrefix := v.Sub("clothing").Sub("pants")
t.Setenv("FOO_CLOTHING_PANTS_SIZE", "large")
assert.Equal(t, "large", subWithPrefix.Get("size"))
}
func TestAllKeys(t *testing.T) {
initConfigs()
ks := []string{
"title",
"author.bio",
"author.e-mail",
"author.github",
"author.name",
"newkey",
"owner.organization",
"owner.dob",
"owner.bio",
"name",
"beard",
"ppu",
"batters.batter",
"hobbies",
"clothing.jacket",
"clothing.trousers",
"default.import_path",
"default.name",
"default.version",
"clothing.pants.size",
"age",
"hacker",
"id",
"type",
"eyes",
"p_id",
"p_ppu",
"p_batters.batter.type",
"p_type",
"p_name",
"foos",
"title_dotenv",
"type_dotenv",
"name_dotenv",
}
dob, _ := time.Parse(time.RFC3339, "1979-05-27T07:32:00Z")
all := map[string]any{
"owner": map[string]any{
"organization": "MongoDB",
"bio": "MongoDB Chief Developer Advocate & Hacker at Large",
"dob": dob,
},
"title": "TOML Example",
"author": map[string]any{
"e-mail": "fake@localhost",
"github": "https://github.com/Unknown",
"name": "Unknown",
"bio": "Gopher.\nCoding addict.\nGood man.\n",
},
"ppu": 0.55,
"eyes": "brown",
"clothing": map[string]any{
"trousers": "denim",
"jacket": "leather",
"pants": map[string]any{"size": "large"},
},
"default": map[string]any{
"import_path": "gopkg.in/ini.v1",
"name": "ini",
"version": "v1",
},
"id": "0001",
"batters": map[string]any{
"batter": []any{
map[string]any{"type": "Regular"},
map[string]any{"type": "Chocolate"},
map[string]any{"type": "Blueberry"},
map[string]any{"type": "Devil's Food"},
},
},
"hacker": true,
"beard": true,
"hobbies": []any{
"skateboarding",
"snowboarding",
"go",
},
"age": 35,
"type": "donut",
"newkey": "remote",
"name": "Cake",
"p_id": "0001",
"p_ppu": "0.55",
"p_name": "Cake",
"p_batters": map[string]any{
"batter": map[string]any{"type": "Regular"},
},
"p_type": "donut",
"foos": []map[string]any{
{
"foo": []map[string]any{
{"key": 1},
{"key": 2},
{"key": 3},
{"key": 4},
},
},
},
"title_dotenv": "DotEnv Example",
"type_dotenv": "donut",
"name_dotenv": "Cake",
}
assert.ElementsMatch(t, ks, AllKeys())
assert.Equal(t, all, AllSettings())
}
func TestAllKeysWithEnv(t *testing.T) {
v := New()
// bind and define environment variables (including a nested one)
v.BindEnv("id")
v.BindEnv("foo.bar")
v.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
t.Setenv("ID", "13")
t.Setenv("FOO_BAR", "baz")
assert.ElementsMatch(t, []string{"id", "foo.bar"}, v.AllKeys())
}
func TestAliasesOfAliases(t *testing.T) {
Set("Title", "Checking Case")
RegisterAlias("Foo", "Bar")
RegisterAlias("Bar", "Title")
assert.Equal(t, "Checking Case", Get("FOO"))
}
func TestRecursiveAliases(t *testing.T) {
Set("baz", "bat")
RegisterAlias("Baz", "Roo")
RegisterAlias("Roo", "baz")
assert.Equal(t, "bat", Get("Baz"))
}
func TestUnmarshal(t *testing.T) {
Reset()
SetDefault("port", 1313)
Set("name", "Steve")
Set("duration", "1s1ms")
Set("modes", []int{1, 2, 3})
type config struct {
Port int
Name string
Duration time.Duration
Modes []int
}
var C config
err := Unmarshal(&C)
require.NoError(t, err, "unable to decode into struct")
assert.Equal(
t,
&config{
Name: "Steve",
Port: 1313,
Duration: time.Second + time.Millisecond,
Modes: []int{1, 2, 3},
},
&C,
)
Set("port", 1234)
err = Unmarshal(&C)
require.NoError(t, err, "unable to decode into struct")
assert.Equal(
t,
&config{
Name: "Steve",
Port: 1234,
Duration: time.Second + time.Millisecond,
Modes: []int{1, 2, 3},
},
&C,
)
}
func TestUnmarshalWithDecoderOptions(t *testing.T) {
Set("credentials", "{\"foo\":\"bar\"}")
opt := DecodeHook(mapstructure.ComposeDecodeHookFunc(
mapstructure.StringToTimeDurationHookFunc(),
mapstructure.StringToSliceHookFunc(","),
// Custom Decode Hook Function
func(rf reflect.Kind, rt reflect.Kind, data any) (any, error) {
if rf != reflect.String || rt != reflect.Map {
return data, nil
}
m := map[string]string{}
raw := data.(string)
if raw == "" {
return m, nil
}
err := json.Unmarshal([]byte(raw), &m)
return m, err
},
))
type config struct {
Credentials map[string]string
}
var C config
err := Unmarshal(&C, opt)
require.NoError(t, err, "unable to decode into struct")
assert.Equal(t, &config{
Credentials: map[string]string{"foo": "bar"},
}, &C)
}
func TestUnmarshalWithAutomaticEnv(t *testing.T) {
if !features.BindStruct {
t.Skip("binding struct is not enabled")
}
t.Setenv("PORT", "1313")
t.Setenv("NAME", "Steve")
t.Setenv("DURATION", "1s1ms")
t.Setenv("MODES", "1,2,3")
t.Setenv("SECRET", "42")
t.Setenv("FILESYSTEM_SIZE", "4096")
type AuthConfig struct {
Secret string `mapstructure:"secret"`
}
type StorageConfig struct {
Size int `mapstructure:"size"`
}
type Configuration struct {
Port int `mapstructure:"port"`
Name string `mapstructure:"name"`
Duration time.Duration `mapstructure:"duration"`
// Infer name from struct
Modes []int
// Squash nested struct (omit prefix)
Authentication AuthConfig `mapstructure:",squash"`
// Different key
Storage StorageConfig `mapstructure:"filesystem"`
// Omitted field
Flag bool `mapstructure:"flag"`
}
v := New()
v.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
v.AutomaticEnv()
t.Run("OK", func(t *testing.T) {
var config Configuration
if err := v.Unmarshal(&config); err != nil {
t.Fatalf("unable to decode into struct, %v", err)
}
assert.Equal(
t,
Configuration{
Name: "Steve",
Port: 1313,
Duration: time.Second + time.Millisecond,
Modes: []int{1, 2, 3},
Authentication: AuthConfig{
Secret: "42",
},
Storage: StorageConfig{
Size: 4096,
},
},
config,
)
})
t.Run("Precedence", func(t *testing.T) {
var config Configuration
v.Set("port", 1234)
if err := v.Unmarshal(&config); err != nil {
t.Fatalf("unable to decode into struct, %v", err)
}
assert.Equal(
t,
Configuration{
Name: "Steve",
Port: 1234,
Duration: time.Second + time.Millisecond,
Modes: []int{1, 2, 3},
Authentication: AuthConfig{
Secret: "42",
},
Storage: StorageConfig{
Size: 4096,
},
},
config,
)
})
t.Run("Unset", func(t *testing.T) {
var config Configuration
err := v.Unmarshal(&config, func(config *mapstructure.DecoderConfig) {
config.ErrorUnset = true
})
assert.Error(t, err, "expected viper.Unmarshal to return error due to unset field 'FLAG'")
})
t.Run("Exact", func(t *testing.T) {
var config Configuration
v.Set("port", 1234)
if err := v.UnmarshalExact(&config); err != nil {
t.Fatalf("unable to decode into struct, %v", err)
}
assert.Equal(
t,
Configuration{
Name: "Steve",
Port: 1234,
Duration: time.Second + time.Millisecond,
Modes: []int{1, 2, 3},
Authentication: AuthConfig{
Secret: "42",
},
Storage: StorageConfig{
Size: 4096,
},
},
config,
)
})
}
func TestBindPFlags(t *testing.T) {
v := New() // create independent Viper object
flagSet := pflag.NewFlagSet("test", pflag.ContinueOnError)
testValues := map[string]*string{
"host": nil,
"port": nil,
"endpoint": nil,
}
mutatedTestValues := map[string]string{
"host": "localhost",
"port": "6060",
"endpoint": "/public",
}
for name := range testValues {
testValues[name] = flagSet.String(name, "", "test")
}
err := v.BindPFlags(flagSet)
require.NoError(t, err, "error binding flag set")
flagSet.VisitAll(func(flag *pflag.Flag) {
flag.Value.Set(mutatedTestValues[flag.Name])
flag.Changed = true
})
for name, expected := range mutatedTestValues {
assert.Equal(t, expected, v.Get(name))
}
}
func TestBindPFlagsStringSlice(t *testing.T) {
tests := []struct {
Expected []string
Value string
}{
{[]string{}, ""},
{[]string{"jeden"}, "jeden"},
{[]string{"dwa", "trzy"}, "dwa,trzy"},
{[]string{"cztery", "piec , szesc"}, "cztery,\"piec , szesc\""},
}
v := New() // create independent Viper object
defaultVal := []string{"default"}
v.SetDefault("stringslice", defaultVal)
for _, testValue := range tests {
flagSet := pflag.NewFlagSet("test", pflag.ContinueOnError)
flagSet.StringSlice("stringslice", testValue.Expected, "test")
for _, changed := range []bool{true, false} {
flagSet.VisitAll(func(f *pflag.Flag) {
f.Value.Set(testValue.Value)
f.Changed = changed
})
err := v.BindPFlags(flagSet)
require.NoError(t, err, "error binding flag set")
type TestStr struct {
StringSlice []string
}
val := &TestStr{}
err = v.Unmarshal(val)
require.NoError(t, err, "cannot unmarshal")
if changed {
assert.Equal(t, testValue.Expected, val.StringSlice)
assert.Equal(t, testValue.Expected, v.Get("stringslice"))
} else {
assert.Equal(t, defaultVal, val.StringSlice)
}
}
}
}
func TestBindPFlagsStringArray(t *testing.T) {
tests := []struct {
Expected []string
Value string
}{
{[]string{}, ""},
{[]string{"jeden"}, "jeden"},
{[]string{"dwa,trzy"}, "dwa,trzy"},
{[]string{"cztery,\"piec , szesc\""}, "cztery,\"piec , szesc\""},
}
v := New() // create independent Viper object
defaultVal := []string{"default"}
v.SetDefault("stringarray", defaultVal)
for _, testValue := range tests {
flagSet := pflag.NewFlagSet("test", pflag.ContinueOnError)
flagSet.StringArray("stringarray", testValue.Expected, "test")
for _, changed := range []bool{true, false} {
flagSet.VisitAll(func(f *pflag.Flag) {
f.Value.Set(testValue.Value)
f.Changed = changed
})
err := v.BindPFlags(flagSet)
require.NoError(t, err, "error binding flag set")
type TestStr struct {
StringArray []string
}
val := &TestStr{}
err = v.Unmarshal(val)
require.NoError(t, err, "cannot unmarshal")
if changed {
assert.Equal(t, testValue.Expected, val.StringArray)
assert.Equal(t, testValue.Expected, v.Get("stringarray"))
} else {
assert.Equal(t, defaultVal, val.StringArray)
}
}
}
}
func TestSliceFlagsReturnCorrectType(t *testing.T) {
flagSet := pflag.NewFlagSet("test", pflag.ContinueOnError)
flagSet.IntSlice("int", []int{1, 2}, "")
flagSet.StringSlice("str", []string{"3", "4"}, "")
flagSet.DurationSlice("duration", []time.Duration{5 * time.Second}, "")
v := New()
v.BindPFlags(flagSet)
all := v.AllSettings()
assert.IsType(t, []int{}, all["int"])
assert.IsType(t, []string{}, all["str"])
assert.IsType(t, []time.Duration{}, all["duration"])
}
func TestBindPFlagsIntSlice(t *testing.T) {
tests := []struct {
Expected []int
Value string
}{
{[]int{}, ""},
{[]int{1}, "1"},
{[]int{2, 3}, "2,3"},
}
v := New() // create independent Viper object
defaultVal := []int{0}
v.SetDefault("intslice", defaultVal)
for _, testValue := range tests {
flagSet := pflag.NewFlagSet("test", pflag.ContinueOnError)
flagSet.IntSlice("intslice", testValue.Expected, "test")
for _, changed := range []bool{true, false} {
flagSet.VisitAll(func(f *pflag.Flag) {
f.Value.Set(testValue.Value)
f.Changed = changed
})
err := v.BindPFlags(flagSet)
require.NoError(t, err, "error binding flag set")
type TestInt struct {
IntSlice []int
}
val := &TestInt{}
err = v.Unmarshal(val)
require.NoError(t, err, "cannot unmarshal")
if changed {
assert.Equal(t, testValue.Expected, val.IntSlice)
assert.Equal(t, testValue.Expected, v.Get("intslice"))
} else {
assert.Equal(t, defaultVal, val.IntSlice)
}
}
}
}
func TestBindPFlag(t *testing.T) {
testString := "testing"
testValue := newStringValue(testString, &testString)
flag := &pflag.Flag{
Name: "testflag",
Value: testValue,
Changed: false,
}
BindPFlag("testvalue", flag)
assert.Equal(t, testString, Get("testvalue"))
flag.Value.Set("testing_mutate")
flag.Changed = true // hack for pflag usage
assert.Equal(t, "testing_mutate", Get("testvalue"))
}
func TestBindPFlagDetectNilFlag(t *testing.T) {
result := BindPFlag("testvalue", nil)
assert.Error(t, result)
}
func TestBindPFlagStringToString(t *testing.T) {
tests := []struct {
Expected map[string]string
Value string
}{
{map[string]string{}, ""},
{map[string]string{"yo": "hi"}, "yo=hi"},
{map[string]string{"yo": "hi", "oh": "hi=there"}, "yo=hi,oh=hi=there"},
{map[string]string{"yo": ""}, "yo="},
{map[string]string{"yo": "", "oh": "hi=there"}, "yo=,oh=hi=there"},
}
v := New() // create independent Viper object
defaultVal := map[string]string{}
v.SetDefault("stringtostring", defaultVal)
for _, testValue := range tests {
flagSet := pflag.NewFlagSet("test", pflag.ContinueOnError)
flagSet.StringToString("stringtostring", testValue.Expected, "test")
for _, changed := range []bool{true, false} {
flagSet.VisitAll(func(f *pflag.Flag) {
f.Value.Set(testValue.Value)
f.Changed = changed
})
err := v.BindPFlags(flagSet)
require.NoError(t, err, "error binding flag set")
type TestMap struct {
StringToString map[string]string
}
val := &TestMap{}
err = v.Unmarshal(val)
require.NoError(t, err, "cannot unmarshal")
if changed {
assert.Equal(t, testValue.Expected, val.StringToString)
} else {
assert.Equal(t, defaultVal, val.StringToString)
}
}
}
}
func TestBindPFlagStringToInt(t *testing.T) {
tests := []struct {
Expected map[string]int
Value string
}{
{map[string]int{"yo": 1, "oh": 21}, "yo=1,oh=21"},
{map[string]int{"yo": 100000000, "oh": 0}, "yo=100000000,oh=0"},
{map[string]int{}, "yo=2,oh=21.0"},
{map[string]int{}, "yo=,oh=20.99"},
{map[string]int{}, "yo=,oh="},
}
v := New() // create independent Viper object
defaultVal := map[string]int{}
v.SetDefault("stringtoint", defaultVal)
for _, testValue := range tests {
flagSet := pflag.NewFlagSet("test", pflag.ContinueOnError)
flagSet.StringToInt("stringtoint", testValue.Expected, "test")
for _, changed := range []bool{true, false} {
flagSet.VisitAll(func(f *pflag.Flag) {
f.Value.Set(testValue.Value)
f.Changed = changed
})
err := v.BindPFlags(flagSet)
require.NoError(t, err, "error binding flag set")
type TestMap struct {
StringToInt map[string]int
}
val := &TestMap{}
err = v.Unmarshal(val)
require.NoError(t, err, "cannot unmarshal")
if changed {
assert.Equal(t, testValue.Expected, val.StringToInt)
} else {
assert.Equal(t, defaultVal, val.StringToInt)
}
}
}
}
func TestBoundCaseSensitivity(t *testing.T) {
initConfigs()
assert.Equal(t, "brown", Get("eyes"))
BindEnv("eYEs", "TURTLE_EYES")
t.Setenv("TURTLE_EYES", "blue")
assert.Equal(t, "blue", Get("eyes"))
testString := "green"
testValue := newStringValue(testString, &testString)
flag := &pflag.Flag{
Name: "eyeballs",
Value: testValue,
Changed: true,
}
BindPFlag("eYEs", flag)
assert.Equal(t, "green", Get("eyes"))
}
func TestSizeInBytes(t *testing.T) {
input := map[string]uint{
"": 0,
"b": 0,
"12 bytes": 0,
"200000000000gb": 0,
"12 b": 12,
"43 MB": 43 * (1 << 20),
"10mb": 10 * (1 << 20),
"1gb": 1 << 30,
}
for str, expected := range input {
assert.Equal(t, expected, parseSizeInBytes(str), str)
}
}
func TestFindsNestedKeys(t *testing.T) {
initConfigs()
dob, _ := time.Parse(time.RFC3339, "1979-05-27T07:32:00Z")
Set("super", map[string]any{
"deep": map[string]any{
"nested": "value",
},
})
expected := map[string]any{
"super": map[string]any{
"deep": map[string]any{
"nested": "value",
},
},
"super.deep": map[string]any{
"nested": "value",
},
"super.deep.nested": "value",
"owner.organization": "MongoDB",
"batters.batter": []any{
map[string]any{
"type": "Regular",
},
map[string]any{
"type": "Chocolate",
},
map[string]any{
"type": "Blueberry",
},
map[string]any{
"type": "Devil's Food",
},
},
"hobbies": []any{
"skateboarding", "snowboarding", "go",
},
"TITLE_DOTENV": "DotEnv Example",
"TYPE_DOTENV": "donut",
"NAME_DOTENV": "Cake",
"title": "TOML Example",
"newkey": "remote",
"batters": map[string]any{
"batter": []any{
map[string]any{
"type": "Regular",
},
map[string]any{
"type": "Chocolate",
},
map[string]any{
"type": "Blueberry",
},
map[string]any{
"type": "Devil's Food",
},
},
},
"eyes": "brown",
"age": 35,
"owner": map[string]any{
"organization": "MongoDB",
"bio": "MongoDB Chief Developer Advocate & Hacker at Large",
"dob": dob,
},
"owner.bio": "MongoDB Chief Developer Advocate & Hacker at Large",
"type": "donut",
"id": "0001",
"name": "Cake",
"hacker": true,
"ppu": 0.55,
"clothing": map[string]any{
"jacket": "leather",
"trousers": "denim",
"pants": map[string]any{
"size": "large",
},
},
"clothing.jacket": "leather",
"clothing.pants.size": "large",
"clothing.trousers": "denim",
"owner.dob": dob,
"beard": true,
"foos": []map[string]any{
{
"foo": []map[string]any{
{
"key": 1,
},
{
"key": 2,
},
{
"key": 3,
},
{
"key": 4,
},
},
},
},
}
for key, expectedValue := range expected {
assert.Equal(t, expectedValue, v.Get(key))
}
}
func TestReadBufConfig(t *testing.T) {
v := New()
v.SetConfigType("yaml")
v.ReadConfig(bytes.NewBuffer(yamlExample))
t.Log(v.AllKeys())
assert.True(t, v.InConfig("name"))
assert.True(t, v.InConfig("clothing.jacket"))
assert.False(t, v.InConfig("state"))
assert.False(t, v.InConfig("clothing.hat"))
assert.Equal(t, "steve", v.Get("name"))
assert.Equal(t, []any{"skateboarding", "snowboarding", "go"}, v.Get("hobbies"))
assert.Equal(t, map[string]any{"jacket": "leather", "trousers": "denim", "pants": map[string]any{"size": "large"}}, v.Get("clothing"))
assert.Equal(t, 35, v.Get("age"))
}
func TestIsSet(t *testing.T) {
v := New()
v.SetConfigType("yaml")
/* config and defaults */
v.ReadConfig(bytes.NewBuffer(yamlExample))
v.SetDefault("clothing.shoes", "sneakers")
assert.True(t, v.IsSet("clothing"))
assert.True(t, v.IsSet("clothing.jacket"))
assert.False(t, v.IsSet("clothing.jackets"))
assert.True(t, v.IsSet("clothing.shoes"))
/* state change */
assert.False(t, v.IsSet("helloworld"))
v.Set("helloworld", "fubar")
assert.True(t, v.IsSet("helloworld"))
/* env */
v.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
v.BindEnv("eyes")
v.BindEnv("foo")
v.BindEnv("clothing.hat")
v.BindEnv("clothing.hats")
t.Setenv("FOO", "bar")
t.Setenv("CLOTHING_HAT", "bowler")
assert.True(t, v.IsSet("eyes")) // in the config file
assert.True(t, v.IsSet("foo")) // in the environment
assert.True(t, v.IsSet("clothing.hat")) // in the environment
assert.False(t, v.IsSet("clothing.hats")) // not defined
/* flags */
flagset := pflag.NewFlagSet("testisset", pflag.ContinueOnError)
flagset.Bool("foobaz", false, "foobaz")
flagset.Bool("barbaz", false, "barbaz")
foobaz, barbaz := flagset.Lookup("foobaz"), flagset.Lookup("barbaz")
v.BindPFlag("foobaz", foobaz)
v.BindPFlag("barbaz", barbaz)
barbaz.Value.Set("true")
barbaz.Changed = true // hack for pflag usage
assert.False(t, v.IsSet("foobaz"))
assert.True(t, v.IsSet("barbaz"))
}
func TestDirsSearch(t *testing.T) {
root, config := initDirs(t)
v := New()
v.SetConfigName(config)
v.SetDefault(`key`, `default`)
entries, err := os.ReadDir(root)
require.NoError(t, err)
for _, e := range entries {
if e.IsDir() {
v.AddConfigPath(filepath.Join(root, e.Name()))
}
}
err = v.ReadInConfig()
require.NoError(t, err)
assert.Equal(t, `value is `+filepath.Base(v.configPaths[0]), v.GetString(`key`))
}
func TestWrongDirsSearchNotFound(t *testing.T) {
_, config := initDirs(t)
v := New()
v.SetConfigName(config)
v.SetDefault(`key`, `default`)
v.AddConfigPath(`whattayoutalkingbout`)
v.AddConfigPath(`thispathaintthere`)
err := v.ReadInConfig()
assert.IsType(t, err, ConfigFileNotFoundError{"", ""})
// Even though config did not load and the error might have
// been ignored by the client, the default still loads
assert.Equal(t, `default`, v.GetString(`key`))
}
func TestWrongDirsSearchNotFoundForMerge(t *testing.T) {
_, config := initDirs(t)
v := New()
v.SetConfigName(config)
v.SetDefault(`key`, `default`)
v.AddConfigPath(`whattayoutalkingbout`)
v.AddConfigPath(`thispathaintthere`)
err := v.MergeInConfig()
assert.Equal(t, reflect.TypeOf(ConfigFileNotFoundError{"", ""}), reflect.TypeOf(err))
// Even though config did not load and the error might have
// been ignored by the client, the default still loads
assert.Equal(t, `default`, v.GetString(`key`))
}
var yamlInvalid = []byte(`hash: map
- foo
- bar
`)
func TestUnwrapParseErrors(t *testing.T) {
SetConfigType("yaml")
assert.ErrorAs(t, ReadConfig(bytes.NewBuffer(yamlInvalid)), &ConfigParseError{})
}
func TestSub(t *testing.T) {
v := New()
v.SetConfigType("yaml")
v.ReadConfig(bytes.NewBuffer(yamlExample))
subv := v.Sub("clothing")
assert.Equal(t, v.Get("clothing.pants.size"), subv.Get("pants.size"))
subv = v.Sub("clothing.pants")
assert.Equal(t, v.Get("clothing.pants.size"), subv.Get("size"))
subv = v.Sub("clothing.pants.size")
assert.Equal(t, (*Viper)(nil), subv)
subv = v.Sub("missing.key")
assert.Equal(t, (*Viper)(nil), subv)
subv = v.Sub("clothing")
assert.Equal(t, []string{"clothing"}, subv.parents)
subv = v.Sub("clothing").Sub("pants")
assert.Equal(t, []string{"clothing", "pants"}, subv.parents)
}
var hclWriteExpected = []byte(`"foos" = {
"foo" = {
"key" = 1
}
"foo" = {
"key" = 2
}
"foo" = {
"key" = 3
}
"foo" = {
"key" = 4
}
}
"id" = "0001"
"name" = "Cake"
"ppu" = 0.55
"type" = "donut"`)
var jsonWriteExpected = []byte(`{
"batters": {
"batter": [
{
"type": "Regular"
},
{
"type": "Chocolate"
},
{
"type": "Blueberry"
},
{
"type": "Devil's Food"
}
]
},
"id": "0001",
"name": "Cake",
"ppu": 0.55,
"type": "donut"
}`)
var propertiesWriteExpected = []byte(`p_id = 0001
p_type = donut
p_name = Cake
p_ppu = 0.55
p_batters.batter.type = Regular
`)
// var yamlWriteExpected = []byte(`age: 35
// beard: true
// clothing:
// jacket: leather
// pants:
// size: large
// trousers: denim
// eyes: brown
// hacker: true
// hobbies:
// - skateboarding
// - snowboarding
// - go
// name: steve
// `)
func TestWriteConfig(t *testing.T) {
fs := afero.NewMemMapFs()
testCases := map[string]struct {
configName string
inConfigType string
outConfigType string
fileName string
input []byte
expectedContent []byte
}{
"hcl with file extension": {
configName: "c",
inConfigType: "hcl",
outConfigType: "hcl",
fileName: "c.hcl",
input: hclExample,
expectedContent: hclWriteExpected,
},
"hcl without file extension": {
configName: "c",
inConfigType: "hcl",
outConfigType: "hcl",
fileName: "c",
input: hclExample,
expectedContent: hclWriteExpected,
},
"hcl with file extension and mismatch type": {
configName: "c",
inConfigType: "hcl",
outConfigType: "json",
fileName: "c.hcl",
input: hclExample,
expectedContent: hclWriteExpected,
},
"json with file extension": {
configName: "c",
inConfigType: "json",
outConfigType: "json",
fileName: "c.json",
input: jsonExample,
expectedContent: jsonWriteExpected,
},
"json without file extension": {
configName: "c",
inConfigType: "json",
outConfigType: "json",
fileName: "c",
input: jsonExample,
expectedContent: jsonWriteExpected,
},
"json with file extension and mismatch type": {
configName: "c",
inConfigType: "json",
outConfigType: "hcl",
fileName: "c.json",
input: jsonExample,
expectedContent: jsonWriteExpected,
},
"properties with file extension": {
configName: "c",
inConfigType: "properties",
outConfigType: "properties",
fileName: "c.properties",
input: propertiesExample,
expectedContent: propertiesWriteExpected,
},
"properties without file extension": {
configName: "c",
inConfigType: "properties",
outConfigType: "properties",
fileName: "c",
input: propertiesExample,
expectedContent: propertiesWriteExpected,
},
"yaml with file extension": {
configName: "c",
inConfigType: "yaml",
outConfigType: "yaml",
fileName: "c.yaml",
input: yamlExample,
expectedContent: yamlWriteExpected,
},
"yaml without file extension": {
configName: "c",
inConfigType: "yaml",
outConfigType: "yaml",
fileName: "c",
input: yamlExample,
expectedContent: yamlWriteExpected,
},
"yaml with file extension and mismatch type": {
configName: "c",
inConfigType: "yaml",
outConfigType: "json",
fileName: "c.yaml",
input: yamlExample,
expectedContent: yamlWriteExpected,
},
}
for name, tc := range testCases {
t.Run(name, func(t *testing.T) {
v := New()
v.SetFs(fs)
v.SetConfigName(tc.fileName)
v.SetConfigType(tc.inConfigType)
err := v.ReadConfig(bytes.NewBuffer(tc.input))
require.NoError(t, err)
v.SetConfigType(tc.outConfigType)
err = v.WriteConfigAs(tc.fileName)
require.NoError(t, err)
read, err := afero.ReadFile(fs, tc.fileName)
require.NoError(t, err)
assert.Equal(t, tc.expectedContent, read)
})
}
}
func TestWriteConfigTOML(t *testing.T) {
fs := afero.NewMemMapFs()
testCases := map[string]struct {
configName string
configType string
fileName string
input []byte
}{
"with file extension": {
configName: "c",
configType: "toml",
fileName: "c.toml",
input: tomlExample,
},
"without file extension": {
configName: "c",
configType: "toml",
fileName: "c",
input: tomlExample,
},
}
for name, tc := range testCases {
t.Run(name, func(t *testing.T) {
v := New()
v.SetFs(fs)
v.SetConfigName(tc.configName)
v.SetConfigType(tc.configType)
err := v.ReadConfig(bytes.NewBuffer(tc.input))
require.NoError(t, err)
err = v.WriteConfigAs(tc.fileName)
require.NoError(t, err)
// The TOML String method does not order the contents.
// Therefore, we must read the generated file and compare the data.
v2 := New()
v2.SetFs(fs)
v2.SetConfigName(tc.configName)
v2.SetConfigType(tc.configType)
v2.SetConfigFile(tc.fileName)
err = v2.ReadInConfig()
require.NoError(t, err)
assert.Equal(t, v.GetString("title"), v2.GetString("title"))
assert.Equal(t, v.GetString("owner.bio"), v2.GetString("owner.bio"))
assert.Equal(t, v.GetString("owner.dob"), v2.GetString("owner.dob"))
assert.Equal(t, v.GetString("owner.organization"), v2.GetString("owner.organization"))
})
}
}
func TestWriteConfigDotEnv(t *testing.T) {
fs := afero.NewMemMapFs()
testCases := map[string]struct {
configName string
configType string
fileName string
input []byte
}{
"with file extension": {
configName: "c",
configType: "env",
fileName: "c.env",
input: dotenvExample,
},
"without file extension": {
configName: "c",
configType: "env",
fileName: "c",
input: dotenvExample,
},
}
for name, tc := range testCases {
t.Run(name, func(t *testing.T) {
v := New()
v.SetFs(fs)
v.SetConfigName(tc.configName)
v.SetConfigType(tc.configType)
err := v.ReadConfig(bytes.NewBuffer(tc.input))
require.NoError(t, err)
err = v.WriteConfigAs(tc.fileName)
require.NoError(t, err)
// The TOML String method does not order the contents.
// Therefore, we must read the generated file and compare the data.
v2 := New()
v2.SetFs(fs)
v2.SetConfigName(tc.configName)
v2.SetConfigType(tc.configType)
v2.SetConfigFile(tc.fileName)
err = v2.ReadInConfig()
require.NoError(t, err)
assert.Equal(t, v.GetString("title_dotenv"), v2.GetString("title_dotenv"))
assert.Equal(t, v.GetString("type_dotenv"), v2.GetString("type_dotenv"))
assert.Equal(t, v.GetString("kind_dotenv"), v2.GetString("kind_dotenv"))
})
}
}
func TestSafeWriteConfig(t *testing.T) {
v := New()
fs := afero.NewMemMapFs()
v.SetFs(fs)
v.AddConfigPath("/test")
v.SetConfigName("c")
v.SetConfigType("yaml")
require.NoError(t, v.ReadConfig(bytes.NewBuffer(yamlExample)))
require.NoError(t, v.SafeWriteConfig())
read, err := afero.ReadFile(fs, testutil.AbsFilePath(t, "/test/c.yaml"))
require.NoError(t, err)
assert.Equal(t, yamlWriteExpected, read)
}
func TestSafeWriteConfigWithMissingConfigPath(t *testing.T) {
v := New()
fs := afero.NewMemMapFs()
v.SetFs(fs)
v.SetConfigName("c")
v.SetConfigType("yaml")
require.EqualError(t, v.SafeWriteConfig(), "missing configuration for 'configPath'")
}
func TestSafeWriteConfigWithExistingFile(t *testing.T) {
v := New()
fs := afero.NewMemMapFs()
fs.Create(testutil.AbsFilePath(t, "/test/c.yaml"))
v.SetFs(fs)
v.AddConfigPath("/test")
v.SetConfigName("c")
v.SetConfigType("yaml")
err := v.SafeWriteConfig()
require.Error(t, err)
_, ok := err.(ConfigFileAlreadyExistsError)
assert.True(t, ok, "Expected ConfigFileAlreadyExistsError")
}
func TestSafeWriteAsConfig(t *testing.T) {
v := New()
fs := afero.NewMemMapFs()
v.SetFs(fs)
err := v.ReadConfig(bytes.NewBuffer(yamlExample))
require.NoError(t, err)
require.NoError(t, v.SafeWriteConfigAs("/test/c.yaml"))
_, err = afero.ReadFile(fs, "/test/c.yaml")
require.NoError(t, err)
}
func TestSafeWriteConfigAsWithExistingFile(t *testing.T) {
v := New()
fs := afero.NewMemMapFs()
fs.Create("/test/c.yaml")
v.SetFs(fs)
err := v.SafeWriteConfigAs("/test/c.yaml")
require.Error(t, err)
_, ok := err.(ConfigFileAlreadyExistsError)
assert.True(t, ok, "Expected ConfigFileAlreadyExistsError")
}
func TestWriteHiddenFile(t *testing.T) {
v := New()
fs := afero.NewMemMapFs()
fs.Create(testutil.AbsFilePath(t, "/test/.config"))
v.SetFs(fs)
v.SetConfigName(".config")
v.SetConfigType("yaml")
v.AddConfigPath("/test")
err := v.ReadInConfig()
require.NoError(t, err)
err = v.WriteConfig()
require.NoError(t, err)
}
var yamlMergeExampleTgt = []byte(`
hello:
pop: 37890
largenum: 765432101234567
num2pow63: 9223372036854775808
universe: null
world:
- us
- uk
- fr
- de
`)
var yamlMergeExampleSrc = []byte(`
hello:
pop: 45000
largenum: 7654321001234567
universe:
- mw
- ad
ints:
- 1
- 2
fu: bar
`)
var jsonMergeExampleTgt = []byte(`
{
"hello": {
"foo": null,
"pop": 123456
}
}
`)
var jsonMergeExampleSrc = []byte(`
{
"hello": {
"foo": "foo str",
"pop": "pop str"
}
}
`)
func TestMergeConfig(t *testing.T) {
v := New()
v.SetConfigType("yml")
err := v.ReadConfig(bytes.NewBuffer(yamlMergeExampleTgt))
require.NoError(t, err)
assert.Equal(t, 37890, v.GetInt("hello.pop"))
assert.Equal(t, int32(37890), v.GetInt32("hello.pop"))
assert.Equal(t, int64(765432101234567), v.GetInt64("hello.largenum"))
assert.Equal(t, uint(37890), v.GetUint("hello.pop"))
assert.Equal(t, uint16(37890), v.GetUint16("hello.pop"))
assert.Equal(t, uint32(37890), v.GetUint32("hello.pop"))
assert.Equal(t, uint64(9223372036854775808), v.GetUint64("hello.num2pow63"))
assert.Len(t, v.GetStringSlice("hello.world"), 4)
assert.Empty(t, v.GetString("fu"))
err = v.MergeConfig(bytes.NewBuffer(yamlMergeExampleSrc))
require.NoError(t, err)
assert.Equal(t, 45000, v.GetInt("hello.pop"))
assert.Equal(t, int32(45000), v.GetInt32("hello.pop"))
assert.Equal(t, int64(7654321001234567), v.GetInt64("hello.largenum"))
assert.Len(t, v.GetStringSlice("hello.world"), 4)
assert.Len(t, v.GetStringSlice("hello.universe"), 2)
assert.Len(t, v.GetIntSlice("hello.ints"), 2)
assert.Equal(t, "bar", v.GetString("fu"))
}
func TestMergeConfigOverrideType(t *testing.T) {
v := New()
v.SetConfigType("json")
err := v.ReadConfig(bytes.NewBuffer(jsonMergeExampleTgt))
require.NoError(t, err)
err = v.MergeConfig(bytes.NewBuffer(jsonMergeExampleSrc))
require.NoError(t, err)
assert.Equal(t, "pop str", v.GetString("hello.pop"))
assert.Equal(t, "foo str", v.GetString("hello.foo"))
}
func TestMergeConfigNoMerge(t *testing.T) {
v := New()
v.SetConfigType("yml")
err := v.ReadConfig(bytes.NewBuffer(yamlMergeExampleTgt))
require.NoError(t, err)
assert.Equal(t, 37890, v.GetInt("hello.pop"))
assert.Len(t, v.GetStringSlice("hello.world"), 4)
assert.Empty(t, v.GetString("fu"))
err = v.ReadConfig(bytes.NewBuffer(yamlMergeExampleSrc))
require.NoError(t, err)
assert.Equal(t, 45000, v.GetInt("hello.pop"))
assert.Empty(t, v.GetStringSlice("hello.world"))
assert.Len(t, v.GetStringSlice("hello.universe"), 2)
assert.Len(t, v.GetIntSlice("hello.ints"), 2)
assert.Equal(t, "bar", v.GetString("fu"))
}
func TestMergeConfigMap(t *testing.T) {
v := New()
v.SetConfigType("yml")
err := v.ReadConfig(bytes.NewBuffer(yamlMergeExampleTgt))
require.NoError(t, err)
assertFn := func(i int) {
large := v.GetInt64("hello.largenum")
pop := v.GetInt("hello.pop")
assert.Equal(t, int64(765432101234567), large)
assert.Equal(t, i, pop)
}
assertFn(37890)
update := map[string]any{
"Hello": map[string]any{
"Pop": 1234,
},
"World": map[any]any{
"Rock": 345,
},
}
err = v.MergeConfigMap(update)
require.NoError(t, err)
assert.Equal(t, 345, v.GetInt("world.rock"))
assertFn(1234)
}
func TestUnmarshalingWithAliases(t *testing.T) {
v := New()
v.SetDefault("ID", 1)
v.Set("name", "Steve")
v.Set("lastname", "Owen")
v.RegisterAlias("UserID", "ID")
v.RegisterAlias("Firstname", "name")
v.RegisterAlias("Surname", "lastname")
type config struct {
ID int
FirstName string
Surname string
}
var C config
err := v.Unmarshal(&C)
require.NoError(t, err, "unable to decode into struct")
assert.Equal(t, &config{ID: 1, FirstName: "Steve", Surname: "Owen"}, &C)
}
func TestSetConfigNameClearsFileCache(t *testing.T) {
SetConfigFile("/tmp/config.yaml")
SetConfigName("default")
f, err := v.getConfigFile()
require.Error(t, err, "config file cache should have been cleared")
assert.Empty(t, f)
}
func TestShadowedNestedValue(t *testing.T) {
config := `name: steve
clothing:
jacket: leather
trousers: denim
pants:
size: large
`
initConfig("yaml", config)
assert.Equal(t, "steve", GetString("name"))
polyester := "polyester"
SetDefault("clothing.shirt", polyester)
SetDefault("clothing.jacket.price", 100)
assert.Equal(t, "leather", GetString("clothing.jacket"))
assert.Nil(t, Get("clothing.jacket.price"))
assert.Equal(t, polyester, GetString("clothing.shirt"))
clothingSettings := AllSettings()["clothing"].(map[string]any)
assert.Equal(t, "leather", clothingSettings["jacket"])
assert.Equal(t, polyester, clothingSettings["shirt"])
}
func TestDotParameter(t *testing.T) {
initJSON()
// should take precedence over batters defined in jsonExample
r := bytes.NewReader([]byte(`{ "batters.batter": [ { "type": "Small" } ] }`))
unmarshalReader(r, v.config)
actual := Get("batters.batter")
expected := []any{map[string]any{"type": "Small"}}
assert.Equal(t, expected, actual)
}
func TestCaseInsensitive(t *testing.T) {
for _, config := range []struct {
typ string
content string
}{
{"yaml", `
aBcD: 1
eF:
gH: 2
iJk: 3
Lm:
nO: 4
P:
Q: 5
R: 6
`},
{"json", `{
"aBcD": 1,
"eF": {
"iJk": 3,
"Lm": {
"P": {
"Q": 5,
"R": 6
},
"nO": 4
},
"gH": 2
}
}`},
{"toml", `aBcD = 1
[eF]
gH = 2
iJk = 3
[eF.Lm]
nO = 4
[eF.Lm.P]
Q = 5
R = 6
`},
} {
doTestCaseInsensitive(t, config.typ, config.content)
}
}
func TestCaseInsensitiveSet(t *testing.T) {
Reset()
m1 := map[string]any{
"Foo": 32,
"Bar": map[any]any{
"ABc": "A",
"cDE": "B",
},
}
m2 := map[string]any{
"Foo": 52,
"Bar": map[any]any{
"bCd": "A",
"eFG": "B",
},
}
Set("Given1", m1)
Set("Number1", 42)
SetDefault("Given2", m2)
SetDefault("Number2", 52)
// Verify SetDefault
assert.Equal(t, 52, Get("number2"))
assert.Equal(t, 52, Get("given2.foo"))
assert.Equal(t, "A", Get("given2.bar.bcd"))
_, ok := m2["Foo"]
assert.True(t, ok)
// Verify Set
assert.Equal(t, 42, Get("number1"))
assert.Equal(t, 32, Get("given1.foo"))
assert.Equal(t, "A", Get("given1.bar.abc"))
_, ok = m1["Foo"]
assert.True(t, ok)
}
func TestParseNested(t *testing.T) {
type duration struct {
Delay time.Duration
}
type item struct {
Name string
Delay time.Duration
Nested duration
}
config := `[[parent]]
delay="100ms"
[parent.nested]
delay="200ms"
`
initConfig("toml", config)
var items []item
err := v.UnmarshalKey("parent", &items)
require.NoError(t, err, "unable to decode into struct")
assert.Len(t, items, 1)
assert.Equal(t, 100*time.Millisecond, items[0].Delay)
assert.Equal(t, 200*time.Millisecond, items[0].Nested.Delay)
}
func doTestCaseInsensitive(t *testing.T, typ, config string) {
initConfig(typ, config)
Set("RfD", true)
assert.Equal(t, true, Get("rfd"))
assert.Equal(t, true, Get("rFD"))
assert.Equal(t, 1, cast.ToInt(Get("abcd")))
assert.Equal(t, 1, cast.ToInt(Get("Abcd")))
assert.Equal(t, 2, cast.ToInt(Get("ef.gh")))
assert.Equal(t, 3, cast.ToInt(Get("ef.ijk")))
assert.Equal(t, 4, cast.ToInt(Get("ef.lm.no")))
assert.Equal(t, 5, cast.ToInt(Get("ef.lm.p.q")))
}
func newViperWithConfigFile(t *testing.T) (*Viper, string) {
watchDir := t.TempDir()
configFile := path.Join(watchDir, "config.yaml")
err := os.WriteFile(configFile, []byte("foo: bar\n"), 0o640)
require.NoError(t, err)
v := New()
v.SetConfigFile(configFile)
err = v.ReadInConfig()
require.NoError(t, err)
require.Equal(t, "bar", v.Get("foo"))
return v, configFile
}
func newViperWithSymlinkedConfigFile(t *testing.T) (*Viper, string, string) {
watchDir := t.TempDir()
dataDir1 := path.Join(watchDir, "data1")
err := os.Mkdir(dataDir1, 0o777)
require.NoError(t, err)
realConfigFile := path.Join(dataDir1, "config.yaml")
t.Logf("Real config file location: %s\n", realConfigFile)
err = os.WriteFile(realConfigFile, []byte("foo: bar\n"), 0o640)
require.NoError(t, err)
// now, symlink the tm `data1` dir to `data` in the baseDir
os.Symlink(dataDir1, path.Join(watchDir, "data"))
// and link the `<watchdir>/datadir1/config.yaml` to `<watchdir>/config.yaml`
configFile := path.Join(watchDir, "config.yaml")
os.Symlink(path.Join(watchDir, "data", "config.yaml"), configFile)
t.Logf("Config file location: %s\n", path.Join(watchDir, "config.yaml"))
// init Viper
v := New()
v.SetConfigFile(configFile)
err = v.ReadInConfig()
require.NoError(t, err)
require.Equal(t, "bar", v.Get("foo"))
return v, watchDir, configFile
}
func TestWatchFile(t *testing.T) {
if runtime.GOOS == "linux" {
// TODO(bep) FIX ME
t.Skip("Skip test on Linux ...")
}
t.Run("file content changed", func(t *testing.T) {
// given a `config.yaml` file being watched
v, configFile := newViperWithConfigFile(t)
_, err := os.Stat(configFile)
require.NoError(t, err)
t.Logf("test config file: %s\n", configFile)
wg := sync.WaitGroup{}
wg.Add(1)
var wgDoneOnce sync.Once // OnConfigChange is called twice on Windows
v.OnConfigChange(func(in fsnotify.Event) {
t.Logf("config file changed")
wgDoneOnce.Do(func() {
wg.Done()
})
})
v.WatchConfig()
// when overwriting the file and waiting for the custom change notification handler to be triggered
err = os.WriteFile(configFile, []byte("foo: baz\n"), 0o640)
wg.Wait()
// then the config value should have changed
require.NoError(t, err)
assert.Equal(t, "baz", v.Get("foo"))
})
t.Run("link to real file changed (à la Kubernetes)", func(t *testing.T) {
// skip if not executed on Linux
if runtime.GOOS != "linux" {
t.Skipf("Skipping test as symlink replacements don't work on non-linux environment...")
}
v, watchDir, _ := newViperWithSymlinkedConfigFile(t)
wg := sync.WaitGroup{}
v.WatchConfig()
v.OnConfigChange(func(in fsnotify.Event) {
t.Logf("config file changed")
wg.Done()
})
wg.Add(1)
// when link to another `config.yaml` file
dataDir2 := path.Join(watchDir, "data2")
err := os.Mkdir(dataDir2, 0o777)
require.NoError(t, err)
configFile2 := path.Join(dataDir2, "config.yaml")
err = os.WriteFile(configFile2, []byte("foo: baz\n"), 0o640)
require.NoError(t, err)
// change the symlink using the `ln -sfn` command
err = exec.Command("ln", "-sfn", dataDir2, path.Join(watchDir, "data")).Run()
require.NoError(t, err)
wg.Wait()
// then
require.NoError(t, err)
assert.Equal(t, "baz", v.Get("foo"))
})
}
func TestUnmarshal_DotSeparatorBackwardCompatibility(t *testing.T) {
flags := pflag.NewFlagSet("test", pflag.ContinueOnError)
flags.String("foo.bar", "cobra_flag", "")
v := New()
assert.NoError(t, v.BindPFlags(flags))
config := &struct {
Foo struct {
Bar string
}
}{}
assert.NoError(t, v.Unmarshal(config))
assert.Equal(t, "cobra_flag", config.Foo.Bar)
}
// var yamlExampleWithDot = []byte(`Hacker: true
// name: steve
// hobbies:
// - skateboarding
// - snowboarding
// - go
// clothing:
// jacket: leather
// trousers: denim
// pants:
// size: large
// age: 35
// eyes : brown
// beard: true
// emails:
// steve@hacker.com:
// created: 01/02/03
// active: true
// `)
func TestKeyDelimiter(t *testing.T) {
v := NewWithOptions(KeyDelimiter("::"))
v.SetConfigType("yaml")
r := strings.NewReader(string(yamlExampleWithDot))
err := v.unmarshalReader(r, v.config)
require.NoError(t, err)
values := map[string]any{
"image": map[string]any{
"repository": "someImage",
"tag": "1.0.0",
},
"ingress": map[string]any{
"annotations": map[string]any{
"traefik.frontend.rule.type": "PathPrefix",
"traefik.ingress.kubernetes.io/ssl-redirect": "true",
},
},
}
v.SetDefault("charts::values", values)
assert.Equal(t, "leather", v.GetString("clothing::jacket"))
assert.Equal(t, "01/02/03", v.GetString("emails::steve@hacker.com::created"))
type config struct {
Charts struct {
Values map[string]any
}
}
expected := config{
Charts: struct {
Values map[string]any
}{
Values: values,
},
}
var actual config
assert.NoError(t, v.Unmarshal(&actual))
assert.Equal(t, expected, actual)
}
var yamlDeepNestedSlices = []byte(`TV:
- title: "The Expanse"
title_i18n:
USA: "The Expanse"
Japan: "エクスパンス -巨獣めざめる-"
seasons:
- first_released: "December 14, 2015"
episodes:
- title: "Dulcinea"
air_date: "December 14, 2015"
- title: "The Big Empty"
air_date: "December 15, 2015"
- title: "Remember the Cant"
air_date: "December 22, 2015"
- first_released: "February 1, 2017"
episodes:
- title: "Safe"
air_date: "February 1, 2017"
- title: "Doors & Corners"
air_date: "February 1, 2017"
- title: "Static"
air_date: "February 8, 2017"
episodes:
- ["Dulcinea", "The Big Empty", "Remember the Cant"]
- ["Safe", "Doors & Corners", "Static"]
`)
func TestSliceIndexAccess(t *testing.T) {
v.SetConfigType("yaml")
r := strings.NewReader(string(yamlDeepNestedSlices))
err := v.unmarshalReader(r, v.config)
require.NoError(t, err)
assert.Equal(t, "The Expanse", v.GetString("tv.0.title"))
assert.Equal(t, "February 1, 2017", v.GetString("tv.0.seasons.1.first_released"))
assert.Equal(t, "Static", v.GetString("tv.0.seasons.1.episodes.2.title"))
assert.Equal(t, "December 15, 2015", v.GetString("tv.0.seasons.0.episodes.1.air_date"))
// Test nested keys with capital letters
assert.Equal(t, "The Expanse", v.GetString("tv.0.title_i18n.USA"))
assert.Equal(t, "エクスパンス -巨獣めざめる-", v.GetString("tv.0.title_i18n.Japan"))
// Test for index out of bounds
assert.Equal(t, "", v.GetString("tv.0.seasons.2.first_released"))
// Accessing multidimensional arrays
assert.Equal(t, "Static", v.GetString("tv.0.episodes.1.2"))
}
var yamlSimpleSlice = []byte(`
name: Steve
port: 8080
auth:
secret: 88888-88888
modes:
- 1
- 2
- 3
clients:
- name: foo
- name: bar
proxy:
clients:
- name: proxy_foo
- name: proxy_bar
- name: proxy_baz
`)
func TestSliceIndexAutomaticEnv(t *testing.T) {
v.SetConfigType("yaml")
r := strings.NewReader(string(yamlSimpleSlice))
type ClientConfig struct {
Name string
}
type AuthConfig struct {
Secret string
}
type ProxyConfig struct {
Clients []ClientConfig
}
type Configuration struct {
Port int
Name string
Auth AuthConfig
Modes []int
Clients []ClientConfig
Proxy ProxyConfig
}
// Read yaml as default value
err := v.unmarshalReader(r, v.config)
require.NoError(t, err)
assert.Equal(t, "Steve", v.GetString("name"))
assert.Equal(t, 8080, v.GetInt("port"))
assert.Equal(t, "88888-88888", v.GetString("auth.secret"))
assert.Equal(t, "foo", v.GetString("clients.0.name"))
assert.Equal(t, "bar", v.GetString("clients.1.name"))
assert.Equal(t, "proxy_foo", v.GetString("proxy.clients.0.name"))
assert.Equal(t, []int{1, 2, 3}, v.GetIntSlice("modes"))
// Override with env variable
t.Setenv("NAME", "Steven")
t.Setenv("AUTH_SECRET", "99999-99999")
t.Setenv("MODES_2", "300")
t.Setenv("CLIENTS_1_NAME", "baz")
t.Setenv("PROXY_CLIENTS_0_NAME", "ProxyFoo")
SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
AutomaticEnv()
// Unmarshal into struct
var config Configuration
v.Unmarshal(&config)
assert.Equal(t, "Steven", config.Name)
assert.Equal(t, 8080, config.Port)
assert.Equal(t, "99999-99999", config.Auth.Secret)
assert.Equal(t, []int{1, 2, 300}, config.Modes)
assert.Equal(t, "foo", config.Clients[0].Name)
assert.Equal(t, "baz", config.Clients[1].Name)
assert.Equal(t, "ProxyFoo", config.Proxy.Clients[0].Name)
}
func TestIsPathShadowedInFlatMap(t *testing.T) {
v := New()
stringMap := map[string]string{
"foo": "value",
}
flagMap := map[string]FlagValue{
"foo": pflagValue{},
}
path1 := []string{"foo", "bar"}
expected1 := "foo"
// "foo.bar" should shadowed by "foo"
assert.Equal(t, expected1, v.isPathShadowedInFlatMap(path1, stringMap))
assert.Equal(t, expected1, v.isPathShadowedInFlatMap(path1, flagMap))
path2 := []string{"bar", "foo"}
expected2 := ""
// "bar.foo" should not shadowed by "foo"
assert.Equal(t, expected2, v.isPathShadowedInFlatMap(path2, stringMap))
assert.Equal(t, expected2, v.isPathShadowedInFlatMap(path2, flagMap))
}
func TestFlagShadow(t *testing.T) {
v := New()
v.SetDefault("foo.bar1.bar2", "default")
flags := pflag.NewFlagSet("test", pflag.ContinueOnError)
flags.String("foo.bar1", "shadowed", "")
flags.VisitAll(func(flag *pflag.Flag) {
flag.Changed = true
})
v.BindPFlags(flags)
assert.Equal(t, "shadowed", v.GetString("foo.bar1"))
// the default "foo.bar1.bar2" value should shadowed by flag "foo.bar1" value
// and should return an empty string
assert.Equal(t, "", v.GetString("foo.bar1.bar2"))
}
func BenchmarkGetBool(b *testing.B) {
key := "BenchmarkGetBool"
v = New()
v.Set(key, true)
for i := 0; i < b.N; i++ {
if !v.GetBool(key) {
b.Fatal("GetBool returned false")
}
}
}
func BenchmarkGet(b *testing.B) {
key := "BenchmarkGet"
v = New()
v.Set(key, true)
for i := 0; i < b.N; i++ {
if !v.Get(key).(bool) {
b.Fatal("Get returned false")
}
}
}
// BenchmarkGetBoolFromMap is the "perfect result" for the above.
func BenchmarkGetBoolFromMap(b *testing.B) {
m := make(map[string]bool)
key := "BenchmarkGetBool"
m[key] = true
for i := 0; i < b.N; i++ {
if !m[key] {
b.Fatal("Map value was false")
}
}
}
// Skip some tests on Windows that kept failing when Windows was added to the CI as a target.
//
//nolint:gocritic // sloppyTestFuncName
func skipWindows(t *testing.T) {
if runtime.GOOS == "windows" {
t.Skip("Skip test on Windows")
}
}
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