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env_test.go
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env_test.go
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package env
import (
"errors"
"fmt"
"net/http"
"net/url"
"os"
"path/filepath"
"reflect"
"runtime"
"strconv"
"strings"
"testing"
"time"
)
type unmarshaler struct {
time.Duration
}
// TextUnmarshaler implements encoding.TextUnmarshaler.
func (d *unmarshaler) UnmarshalText(data []byte) (err error) {
if len(data) != 0 {
d.Duration, err = time.ParseDuration(string(data))
} else {
d.Duration = 0
}
return err
}
// nolint: maligned
type Config struct {
String string `env:"STRING"`
StringPtr *string `env:"STRING"`
Strings []string `env:"STRINGS"`
StringPtrs []*string `env:"STRINGS"`
Bool bool `env:"BOOL"`
BoolPtr *bool `env:"BOOL"`
Bools []bool `env:"BOOLS"`
BoolPtrs []*bool `env:"BOOLS"`
Int int `env:"INT"`
IntPtr *int `env:"INT"`
Ints []int `env:"INTS"`
IntPtrs []*int `env:"INTS"`
Int8 int8 `env:"INT8"`
Int8Ptr *int8 `env:"INT8"`
Int8s []int8 `env:"INT8S"`
Int8Ptrs []*int8 `env:"INT8S"`
Int16 int16 `env:"INT16"`
Int16Ptr *int16 `env:"INT16"`
Int16s []int16 `env:"INT16S"`
Int16Ptrs []*int16 `env:"INT16S"`
Int32 int32 `env:"INT32"`
Int32Ptr *int32 `env:"INT32"`
Int32s []int32 `env:"INT32S"`
Int32Ptrs []*int32 `env:"INT32S"`
Int64 int64 `env:"INT64"`
Int64Ptr *int64 `env:"INT64"`
Int64s []int64 `env:"INT64S"`
Int64Ptrs []*int64 `env:"INT64S"`
Uint uint `env:"UINT"`
UintPtr *uint `env:"UINT"`
Uints []uint `env:"UINTS"`
UintPtrs []*uint `env:"UINTS"`
Uint8 uint8 `env:"UINT8"`
Uint8Ptr *uint8 `env:"UINT8"`
Uint8s []uint8 `env:"UINT8S"`
Uint8Ptrs []*uint8 `env:"UINT8S"`
Uint16 uint16 `env:"UINT16"`
Uint16Ptr *uint16 `env:"UINT16"`
Uint16s []uint16 `env:"UINT16S"`
Uint16Ptrs []*uint16 `env:"UINT16S"`
Uint32 uint32 `env:"UINT32"`
Uint32Ptr *uint32 `env:"UINT32"`
Uint32s []uint32 `env:"UINT32S"`
Uint32Ptrs []*uint32 `env:"UINT32S"`
Uint64 uint64 `env:"UINT64"`
Uint64Ptr *uint64 `env:"UINT64"`
Uint64s []uint64 `env:"UINT64S"`
Uint64Ptrs []*uint64 `env:"UINT64S"`
Float32 float32 `env:"FLOAT32"`
Float32Ptr *float32 `env:"FLOAT32"`
Float32s []float32 `env:"FLOAT32S"`
Float32Ptrs []*float32 `env:"FLOAT32S"`
Float64 float64 `env:"FLOAT64"`
Float64Ptr *float64 `env:"FLOAT64"`
Float64s []float64 `env:"FLOAT64S"`
Float64Ptrs []*float64 `env:"FLOAT64S"`
Duration time.Duration `env:"DURATION"`
Durations []time.Duration `env:"DURATIONS"`
DurationPtr *time.Duration `env:"DURATION"`
DurationPtrs []*time.Duration `env:"DURATIONS"`
Unmarshaler unmarshaler `env:"UNMARSHALER"`
UnmarshalerPtr *unmarshaler `env:"UNMARSHALER"`
Unmarshalers []unmarshaler `env:"UNMARSHALERS"`
UnmarshalerPtrs []*unmarshaler `env:"UNMARSHALERS"`
URL url.URL `env:"URL"`
URLPtr *url.URL `env:"URL"`
URLs []url.URL `env:"URLS"`
URLPtrs []*url.URL `env:"URLS"`
StringWithdefault string `env:"DATABASE_URL" envDefault:"postgres://localhost:5432/db"`
CustomSeparator []string `env:"SEPSTRINGS" envSeparator:":"`
NonDefined struct {
String string `env:"NONDEFINED_STR"`
}
NestedNonDefined struct {
NonDefined struct {
String string `env:"STR"`
} `envPrefix:"NONDEFINED_"`
} `envPrefix:"PRF_"`
NotAnEnv string
unexported string `env:"FOO"`
}
type ParentStruct struct {
InnerStruct *InnerStruct
unexported *InnerStruct
Ignored *http.Client
}
type InnerStruct struct {
Inner string `env:"innervar"`
Number uint `env:"innernum"`
}
type ForNestedStruct struct {
NestedStruct
}
type NestedStruct struct {
NestedVar string `env:"nestedvar"`
}
func TestParsesEnv(t *testing.T) {
defer os.Clearenv()
tos := func(v interface{}) string {
return fmt.Sprintf("%v", v)
}
toss := func(v ...interface{}) string {
ss := []string{}
for _, s := range v {
ss = append(ss, tos(s))
}
return strings.Join(ss, ",")
}
str1 := "str1"
str2 := "str2"
os.Setenv("STRING", str1)
os.Setenv("STRINGS", toss(str1, str2))
bool1 := true
bool2 := false
os.Setenv("BOOL", tos(bool1))
os.Setenv("BOOLS", toss(bool1, bool2))
int1 := -1
int2 := 2
os.Setenv("INT", tos(int1))
os.Setenv("INTS", toss(int1, int2))
var int81 int8 = -2
var int82 int8 = 5
os.Setenv("INT8", tos(int81))
os.Setenv("INT8S", toss(int81, int82))
var int161 int16 = -24
var int162 int16 = 15
os.Setenv("INT16", tos(int161))
os.Setenv("INT16S", toss(int161, int162))
var int321 int32 = -14
var int322 int32 = 154
os.Setenv("INT32", tos(int321))
os.Setenv("INT32S", toss(int321, int322))
var int641 int64 = -12
var int642 int64 = 150
os.Setenv("INT64", tos(int641))
os.Setenv("INT64S", toss(int641, int642))
var uint1 uint = 1
var uint2 uint = 2
os.Setenv("UINT", tos(uint1))
os.Setenv("UINTS", toss(uint1, uint2))
var uint81 uint8 = 15
var uint82 uint8 = 51
os.Setenv("UINT8", tos(uint81))
os.Setenv("UINT8S", toss(uint81, uint82))
var uint161 uint16 = 532
var uint162 uint16 = 123
os.Setenv("UINT16", tos(uint161))
os.Setenv("UINT16S", toss(uint161, uint162))
var uint321 uint32 = 93
var uint322 uint32 = 14
os.Setenv("UINT32", tos(uint321))
os.Setenv("UINT32S", toss(uint321, uint322))
var uint641 uint64 = 5
var uint642 uint64 = 43
os.Setenv("UINT64", tos(uint641))
os.Setenv("UINT64S", toss(uint641, uint642))
var float321 float32 = 9.3
var float322 float32 = 1.1
os.Setenv("FLOAT32", tos(float321))
os.Setenv("FLOAT32S", toss(float321, float322))
float641 := 1.53
float642 := 0.5
os.Setenv("FLOAT64", tos(float641))
os.Setenv("FLOAT64S", toss(float641, float642))
duration1 := time.Second
duration2 := time.Second * 4
os.Setenv("DURATION", tos(duration1))
os.Setenv("DURATIONS", toss(duration1, duration2))
unmarshaler1 := unmarshaler{time.Minute}
unmarshaler2 := unmarshaler{time.Millisecond * 1232}
os.Setenv("UNMARSHALER", tos(unmarshaler1.Duration))
os.Setenv("UNMARSHALERS", toss(unmarshaler1.Duration, unmarshaler2.Duration))
url1 := "https://goreleaser.com"
url2 := "https://caarlos0.dev"
os.Setenv("URL", tos(url1))
os.Setenv("URLS", toss(url1, url2))
os.Setenv("SEPSTRINGS", strings.Join([]string{str1, str2}, ":"))
nonDefinedStr := "nonDefinedStr"
os.Setenv("NONDEFINED_STR", nonDefinedStr)
os.Setenv("PRF_NONDEFINED_STR", nonDefinedStr)
cfg := Config{}
isNoErr(t, Parse(&cfg))
isEqual(t, str1, cfg.String)
isEqual(t, &str1, cfg.StringPtr)
isEqual(t, str1, cfg.Strings[0])
isEqual(t, str2, cfg.Strings[1])
isEqual(t, &str1, cfg.StringPtrs[0])
isEqual(t, &str2, cfg.StringPtrs[1])
isEqual(t, bool1, cfg.Bool)
isEqual(t, &bool1, cfg.BoolPtr)
isEqual(t, bool1, cfg.Bools[0])
isEqual(t, bool2, cfg.Bools[1])
isEqual(t, &bool1, cfg.BoolPtrs[0])
isEqual(t, &bool2, cfg.BoolPtrs[1])
isEqual(t, int1, cfg.Int)
isEqual(t, &int1, cfg.IntPtr)
isEqual(t, int1, cfg.Ints[0])
isEqual(t, int2, cfg.Ints[1])
isEqual(t, &int1, cfg.IntPtrs[0])
isEqual(t, &int2, cfg.IntPtrs[1])
isEqual(t, int81, cfg.Int8)
isEqual(t, &int81, cfg.Int8Ptr)
isEqual(t, int81, cfg.Int8s[0])
isEqual(t, int82, cfg.Int8s[1])
isEqual(t, &int81, cfg.Int8Ptrs[0])
isEqual(t, &int82, cfg.Int8Ptrs[1])
isEqual(t, int161, cfg.Int16)
isEqual(t, &int161, cfg.Int16Ptr)
isEqual(t, int161, cfg.Int16s[0])
isEqual(t, int162, cfg.Int16s[1])
isEqual(t, &int161, cfg.Int16Ptrs[0])
isEqual(t, &int162, cfg.Int16Ptrs[1])
isEqual(t, int321, cfg.Int32)
isEqual(t, &int321, cfg.Int32Ptr)
isEqual(t, int321, cfg.Int32s[0])
isEqual(t, int322, cfg.Int32s[1])
isEqual(t, &int321, cfg.Int32Ptrs[0])
isEqual(t, &int322, cfg.Int32Ptrs[1])
isEqual(t, int641, cfg.Int64)
isEqual(t, &int641, cfg.Int64Ptr)
isEqual(t, int641, cfg.Int64s[0])
isEqual(t, int642, cfg.Int64s[1])
isEqual(t, &int641, cfg.Int64Ptrs[0])
isEqual(t, &int642, cfg.Int64Ptrs[1])
isEqual(t, uint1, cfg.Uint)
isEqual(t, &uint1, cfg.UintPtr)
isEqual(t, uint1, cfg.Uints[0])
isEqual(t, uint2, cfg.Uints[1])
isEqual(t, &uint1, cfg.UintPtrs[0])
isEqual(t, &uint2, cfg.UintPtrs[1])
isEqual(t, uint81, cfg.Uint8)
isEqual(t, &uint81, cfg.Uint8Ptr)
isEqual(t, uint81, cfg.Uint8s[0])
isEqual(t, uint82, cfg.Uint8s[1])
isEqual(t, &uint81, cfg.Uint8Ptrs[0])
isEqual(t, &uint82, cfg.Uint8Ptrs[1])
isEqual(t, uint161, cfg.Uint16)
isEqual(t, &uint161, cfg.Uint16Ptr)
isEqual(t, uint161, cfg.Uint16s[0])
isEqual(t, uint162, cfg.Uint16s[1])
isEqual(t, &uint161, cfg.Uint16Ptrs[0])
isEqual(t, &uint162, cfg.Uint16Ptrs[1])
isEqual(t, uint321, cfg.Uint32)
isEqual(t, &uint321, cfg.Uint32Ptr)
isEqual(t, uint321, cfg.Uint32s[0])
isEqual(t, uint322, cfg.Uint32s[1])
isEqual(t, &uint321, cfg.Uint32Ptrs[0])
isEqual(t, &uint322, cfg.Uint32Ptrs[1])
isEqual(t, uint641, cfg.Uint64)
isEqual(t, &uint641, cfg.Uint64Ptr)
isEqual(t, uint641, cfg.Uint64s[0])
isEqual(t, uint642, cfg.Uint64s[1])
isEqual(t, &uint641, cfg.Uint64Ptrs[0])
isEqual(t, &uint642, cfg.Uint64Ptrs[1])
isEqual(t, float321, cfg.Float32)
isEqual(t, &float321, cfg.Float32Ptr)
isEqual(t, float321, cfg.Float32s[0])
isEqual(t, float322, cfg.Float32s[1])
isEqual(t, &float321, cfg.Float32Ptrs[0])
isEqual(t, &float322, cfg.Float32Ptrs[1])
isEqual(t, float641, cfg.Float64)
isEqual(t, &float641, cfg.Float64Ptr)
isEqual(t, float641, cfg.Float64s[0])
isEqual(t, float642, cfg.Float64s[1])
isEqual(t, &float641, cfg.Float64Ptrs[0])
isEqual(t, &float642, cfg.Float64Ptrs[1])
isEqual(t, duration1, cfg.Duration)
isEqual(t, &duration1, cfg.DurationPtr)
isEqual(t, duration1, cfg.Durations[0])
isEqual(t, duration2, cfg.Durations[1])
isEqual(t, &duration1, cfg.DurationPtrs[0])
isEqual(t, &duration2, cfg.DurationPtrs[1])
isEqual(t, unmarshaler1, cfg.Unmarshaler)
isEqual(t, &unmarshaler1, cfg.UnmarshalerPtr)
isEqual(t, unmarshaler1, cfg.Unmarshalers[0])
isEqual(t, unmarshaler2, cfg.Unmarshalers[1])
isEqual(t, &unmarshaler1, cfg.UnmarshalerPtrs[0])
isEqual(t, &unmarshaler2, cfg.UnmarshalerPtrs[1])
isEqual(t, url1, cfg.URL.String())
isEqual(t, url1, cfg.URLPtr.String())
isEqual(t, url1, cfg.URLs[0].String())
isEqual(t, url2, cfg.URLs[1].String())
isEqual(t, url1, cfg.URLPtrs[0].String())
isEqual(t, url2, cfg.URLPtrs[1].String())
isEqual(t, "postgres://localhost:5432/db", cfg.StringWithdefault)
isEqual(t, nonDefinedStr, cfg.NonDefined.String)
isEqual(t, nonDefinedStr, cfg.NestedNonDefined.NonDefined.String)
isEqual(t, str1, cfg.CustomSeparator[0])
isEqual(t, str2, cfg.CustomSeparator[1])
isEqual(t, cfg.NotAnEnv, "")
isEqual(t, cfg.unexported, "")
}
func TestSetEnvAndTagOptsChain(t *testing.T) {
defer os.Clearenv()
type config struct {
Key1 string `mytag:"KEY1,required"`
Key2 int `mytag:"KEY2,required"`
}
envs := map[string]string{
"KEY1": "VALUE1",
"KEY2": "3",
}
cfg := config{}
isNoErr(t, Parse(&cfg, Options{TagName: "mytag"}, Options{Environment: envs}))
isEqual(t, "VALUE1", cfg.Key1)
isEqual(t, 3, cfg.Key2)
}
func TestJSONTag(t *testing.T) {
defer os.Clearenv()
type config struct {
Key1 string `json:"KEY1"`
Key2 int `json:"KEY2"`
}
os.Setenv("KEY1", "VALUE7")
os.Setenv("KEY2", "5")
cfg := config{}
isNoErr(t, Parse(&cfg, Options{TagName: "json"}))
isEqual(t, "VALUE7", cfg.Key1)
isEqual(t, 5, cfg.Key2)
}
func TestParsesEnvInner(t *testing.T) {
os.Setenv("innervar", "someinnervalue")
os.Setenv("innernum", "8")
defer os.Clearenv()
cfg := ParentStruct{
InnerStruct: &InnerStruct{},
unexported: &InnerStruct{},
}
isNoErr(t, Parse(&cfg))
isEqual(t, "someinnervalue", cfg.InnerStruct.Inner)
isEqual(t, uint(8), cfg.InnerStruct.Number)
}
func TestParsesEnvInnerFails(t *testing.T) {
defer os.Clearenv()
type config struct {
Foo struct {
Number int `env:"NUMBER"`
}
}
os.Setenv("NUMBER", "not-a-number")
isErrorWithMessage(t, Parse(&config{}), `env: parse error on field "Number" of type "int": strconv.ParseInt: parsing "not-a-number": invalid syntax`)
}
func TestParsesEnvInnerNil(t *testing.T) {
os.Setenv("innervar", "someinnervalue")
defer os.Clearenv()
cfg := ParentStruct{}
isNoErr(t, Parse(&cfg))
}
func TestParsesEnvInnerInvalid(t *testing.T) {
os.Setenv("innernum", "-547")
defer os.Clearenv()
cfg := ParentStruct{
InnerStruct: &InnerStruct{},
}
isErrorWithMessage(t, Parse(&cfg), `env: parse error on field "Number" of type "uint": strconv.ParseUint: parsing "-547": invalid syntax`)
}
func TestParsesEnvNested(t *testing.T) {
os.Setenv("nestedvar", "somenestedvalue")
defer os.Clearenv()
var cfg ForNestedStruct
isNoErr(t, Parse(&cfg))
isEqual(t, "somenestedvalue", cfg.NestedVar)
}
func TestEmptyVars(t *testing.T) {
os.Clearenv()
cfg := Config{}
isNoErr(t, Parse(&cfg))
isEqual(t, "", cfg.String)
isEqual(t, false, cfg.Bool)
isEqual(t, 0, cfg.Int)
isEqual(t, uint(0), cfg.Uint)
isEqual(t, uint64(0), cfg.Uint64)
isEqual(t, int64(0), cfg.Int64)
isEqual(t, 0, len(cfg.Strings))
isEqual(t, 0, len(cfg.CustomSeparator))
isEqual(t, 0, len(cfg.Ints))
isEqual(t, 0, len(cfg.Bools))
}
func TestPassAnInvalidPtr(t *testing.T) {
var thisShouldBreak int
isErrorWithMessage(t, Parse(&thisShouldBreak), "env: expected a pointer to a Struct")
}
func TestPassReference(t *testing.T) {
cfg := Config{}
isErrorWithMessage(t, Parse(cfg), "env: expected a pointer to a Struct")
}
func TestInvalidBool(t *testing.T) {
os.Setenv("BOOL", "should-be-a-bool")
defer os.Clearenv()
isErrorWithMessage(t, Parse(&Config{}), `env: parse error on field "Bool" of type "bool": strconv.ParseBool: parsing "should-be-a-bool": invalid syntax`)
}
func TestInvalidInt(t *testing.T) {
os.Setenv("INT", "should-be-an-int")
defer os.Clearenv()
isErrorWithMessage(t, Parse(&Config{}), `env: parse error on field "Int" of type "int": strconv.ParseInt: parsing "should-be-an-int": invalid syntax`)
}
func TestInvalidUint(t *testing.T) {
os.Setenv("UINT", "-44")
defer os.Clearenv()
isErrorWithMessage(t, Parse(&Config{}), `env: parse error on field "Uint" of type "uint": strconv.ParseUint: parsing "-44": invalid syntax`)
}
func TestInvalidFloat32(t *testing.T) {
os.Setenv("FLOAT32", "AAA")
defer os.Clearenv()
isErrorWithMessage(t, Parse(&Config{}), `env: parse error on field "Float32" of type "float32": strconv.ParseFloat: parsing "AAA": invalid syntax`)
}
func TestInvalidFloat64(t *testing.T) {
os.Setenv("FLOAT64", "AAA")
defer os.Clearenv()
isErrorWithMessage(t, Parse(&Config{}), `env: parse error on field "Float64" of type "float64": strconv.ParseFloat: parsing "AAA": invalid syntax`)
}
func TestInvalidUint64(t *testing.T) {
os.Setenv("UINT64", "AAA")
defer os.Clearenv()
isErrorWithMessage(t, Parse(&Config{}), `env: parse error on field "Uint64" of type "uint64": strconv.ParseUint: parsing "AAA": invalid syntax`)
}
func TestInvalidInt64(t *testing.T) {
os.Setenv("INT64", "AAA")
defer os.Clearenv()
isErrorWithMessage(t, Parse(&Config{}), `env: parse error on field "Int64" of type "int64": strconv.ParseInt: parsing "AAA": invalid syntax`)
}
func TestInvalidInt64Slice(t *testing.T) {
os.Setenv("BADINTS", "A,2,3")
defer os.Clearenv()
type config struct {
BadFloats []int64 `env:"BADINTS"`
}
isErrorWithMessage(t, Parse(&config{}), `env: parse error on field "BadFloats" of type "[]int64": strconv.ParseInt: parsing "A": invalid syntax`)
}
func TestInvalidUInt64Slice(t *testing.T) {
os.Setenv("BADINTS", "A,2,3")
defer os.Clearenv()
type config struct {
BadFloats []uint64 `env:"BADINTS"`
}
isErrorWithMessage(t, Parse(&config{}), `env: parse error on field "BadFloats" of type "[]uint64": strconv.ParseUint: parsing "A": invalid syntax`)
}
func TestInvalidFloat32Slice(t *testing.T) {
os.Setenv("BADFLOATS", "A,2.0,3.0")
defer os.Clearenv()
type config struct {
BadFloats []float32 `env:"BADFLOATS"`
}
isErrorWithMessage(t, Parse(&config{}), `env: parse error on field "BadFloats" of type "[]float32": strconv.ParseFloat: parsing "A": invalid syntax`)
}
func TestInvalidFloat64Slice(t *testing.T) {
os.Setenv("BADFLOATS", "A,2.0,3.0")
defer os.Clearenv()
type config struct {
BadFloats []float64 `env:"BADFLOATS"`
}
isErrorWithMessage(t, Parse(&config{}), `env: parse error on field "BadFloats" of type "[]float64": strconv.ParseFloat: parsing "A": invalid syntax`)
}
func TestInvalidBoolsSlice(t *testing.T) {
os.Setenv("BADBOOLS", "t,f,TRUE,faaaalse")
defer os.Clearenv()
type config struct {
BadBools []bool `env:"BADBOOLS"`
}
isErrorWithMessage(t, Parse(&config{}), `env: parse error on field "BadBools" of type "[]bool": strconv.ParseBool: parsing "faaaalse": invalid syntax`)
}
func TestInvalidDuration(t *testing.T) {
os.Setenv("DURATION", "should-be-a-valid-duration")
defer os.Clearenv()
isErrorWithMessage(t, Parse(&Config{}), `env: parse error on field "Duration" of type "time.Duration": unable to parse duration: time: invalid duration "should-be-a-valid-duration"`)
}
func TestInvalidDurations(t *testing.T) {
os.Setenv("DURATIONS", "1s,contains-an-invalid-duration,3s")
defer os.Clearenv()
isErrorWithMessage(t, Parse(&Config{}), `env: parse error on field "Durations" of type "[]time.Duration": unable to parse duration: time: invalid duration "contains-an-invalid-duration"`)
}
func TestParseStructWithoutEnvTag(t *testing.T) {
cfg := Config{}
isNoErr(t, Parse(&cfg))
isEqual(t, cfg.NotAnEnv, "")
}
func TestParseStructWithInvalidFieldKind(t *testing.T) {
type config struct {
WontWorkByte byte `env:"BLAH"`
}
os.Setenv("BLAH", "a")
isErrorWithMessage(t, Parse(&config{}), `env: parse error on field "WontWorkByte" of type "uint8": strconv.ParseUint: parsing "a": invalid syntax`)
}
func TestUnsupportedSliceType(t *testing.T) {
type config struct {
WontWork []map[int]int `env:"WONTWORK"`
}
os.Setenv("WONTWORK", "1,2,3")
defer os.Clearenv()
isErrorWithMessage(t, Parse(&config{}), `env: no parser found for field "WontWork" of type "[]map[int]int"`)
}
func TestBadSeparator(t *testing.T) {
type config struct {
WontWork []int `env:"WONTWORK" envSeparator:":"`
}
os.Setenv("WONTWORK", "1,2,3,4")
defer os.Clearenv()
isErrorWithMessage(t, Parse(&config{}), `env: parse error on field "WontWork" of type "[]int": strconv.ParseInt: parsing "1,2,3,4": invalid syntax`)
}
func TestNoErrorRequiredSet(t *testing.T) {
type config struct {
IsRequired string `env:"IS_REQUIRED,required"`
}
cfg := &config{}
os.Setenv("IS_REQUIRED", "")
defer os.Clearenv()
isNoErr(t, Parse(cfg))
isEqual(t, "", cfg.IsRequired)
}
func TestHook(t *testing.T) {
type config struct {
Something string `env:"SOMETHING" envDefault:"important"`
Another string `env:"ANOTHER"`
}
cfg := &config{}
os.Setenv("ANOTHER", "1")
defer os.Clearenv()
type onSetArgs struct {
tag string
key interface{}
isDefault bool
}
var onSetCalled []onSetArgs
isNoErr(t, Parse(cfg, Options{
OnSet: func(tag string, value interface{}, isDefault bool) {
onSetCalled = append(onSetCalled, onSetArgs{tag, value, isDefault})
},
}))
isEqual(t, "important", cfg.Something)
isEqual(t, "1", cfg.Another)
isEqual(t, 2, len(onSetCalled))
isEqual(t, onSetArgs{"SOMETHING", "important", true}, onSetCalled[0])
isEqual(t, onSetArgs{"ANOTHER", "1", false}, onSetCalled[1])
}
func TestErrorRequiredWithDefault(t *testing.T) {
type config struct {
IsRequired string `env:"IS_REQUIRED,required" envDefault:"important"`
}
cfg := &config{}
os.Setenv("IS_REQUIRED", "")
defer os.Clearenv()
isNoErr(t, Parse(cfg))
isEqual(t, "", cfg.IsRequired)
}
func TestErrorRequiredNotSet(t *testing.T) {
type config struct {
IsRequired string `env:"IS_REQUIRED,required"`
}
isErrorWithMessage(t, Parse(&config{}), `env: required environment variable "IS_REQUIRED" is not set`)
}
func TestNoErrorNotEmptySet(t *testing.T) {
os.Setenv("IS_REQUIRED", "1")
defer os.Clearenv()
type config struct {
IsRequired string `env:"IS_REQUIRED,notEmpty"`
}
isNoErr(t, Parse(&config{}))
}
func TestNoErrorRequiredAndNotEmptySet(t *testing.T) {
os.Setenv("IS_REQUIRED", "1")
defer os.Clearenv()
type config struct {
IsRequired string `env:"IS_REQUIRED,required,notEmpty"`
}
isNoErr(t, Parse(&config{}))
}
func TestErrorNotEmptySet(t *testing.T) {
os.Setenv("IS_REQUIRED", "")
defer os.Clearenv()
type config struct {
IsRequired string `env:"IS_REQUIRED,notEmpty"`
}
isErrorWithMessage(t, Parse(&config{}), `env: environment variable "IS_REQUIRED" should not be empty`)
}
func TestErrorRequiredAndNotEmptySet(t *testing.T) {
os.Setenv("IS_REQUIRED", "")
defer os.Clearenv()
type config struct {
IsRequired string `env:"IS_REQUIRED,notEmpty,required"`
}
isErrorWithMessage(t, Parse(&config{}), `env: environment variable "IS_REQUIRED" should not be empty`)
}
func TestErrorRequiredNotSetWithDefault(t *testing.T) {
type config struct {
IsRequired string `env:"IS_REQUIRED,required" envDefault:"important"`
}
cfg := &config{}
isNoErr(t, Parse(cfg))
isEqual(t, "important", cfg.IsRequired)
}
func TestParseExpandOption(t *testing.T) {
type config struct {
Host string `env:"HOST" envDefault:"localhost"`
Port int `env:"PORT" envDefault:"3000" envExpand:"True"`
SecretKey string `env:"SECRET_KEY" envExpand:"True"`
ExpandKey string `env:"EXPAND_KEY"`
CompoundKey string `env:"HOST_PORT" envDefault:"${HOST}:${PORT}" envExpand:"True"`
Default string `env:"DEFAULT" envDefault:"def1" envExpand:"True"`
}
defer os.Clearenv()
os.Setenv("HOST", "localhost")
os.Setenv("PORT", "3000")
os.Setenv("EXPAND_KEY", "qwerty12345")
os.Setenv("SECRET_KEY", "${EXPAND_KEY}")
cfg := config{}
err := Parse(&cfg)
isNoErr(t, err)
isEqual(t, "localhost", cfg.Host)
isEqual(t, 3000, cfg.Port)
isEqual(t, "qwerty12345", cfg.SecretKey)
isEqual(t, "qwerty12345", cfg.ExpandKey)
isEqual(t, "localhost:3000", cfg.CompoundKey)
isEqual(t, "def1", cfg.Default)
}
func TestParseUnsetRequireOptions(t *testing.T) {
type config struct {
Password string `env:"PASSWORD,unset,required"`
}
defer os.Clearenv()
cfg := config{}
isErrorWithMessage(t, Parse(&cfg), `env: required environment variable "PASSWORD" is not set`)
os.Setenv("PASSWORD", "superSecret")
isNoErr(t, Parse(&cfg))
isEqual(t, "superSecret", cfg.Password)
unset, exists := os.LookupEnv("PASSWORD")
isEqual(t, "", unset)
isEqual(t, false, exists)
}
func TestCustomParser(t *testing.T) {
type foo struct {
name string
}
type bar struct {
Name string `env:"OTHER"`
Foo *foo `env:"BLAH"`
}
type config struct {
Var foo `env:"VAR"`
Foo *foo `env:"BLAH"`
Other *bar
}
os.Setenv("VAR", "test")
defer os.Unsetenv("VAR")
os.Setenv("OTHER", "test2")
defer os.Unsetenv("OTHER")
os.Setenv("BLAH", "test3")
defer os.Unsetenv("BLAH")
cfg := &config{
Other: &bar{},
}
err := ParseWithFuncs(cfg, map[reflect.Type]ParserFunc{
reflect.TypeOf(foo{}): func(v string) (interface{}, error) {
return foo{name: v}, nil
},
})
isNoErr(t, err)
isEqual(t, cfg.Var.name, "test")
isEqual(t, cfg.Foo.name, "test3")
isEqual(t, cfg.Other.Name, "test2")
isEqual(t, cfg.Other.Foo.name, "test3")
}
func TestParseWithFuncsNoPtr(t *testing.T) {
type foo struct{}
isErrorWithMessage(t, ParseWithFuncs(foo{}, nil), "env: expected a pointer to a Struct")
}
func TestParseWithFuncsInvalidType(t *testing.T) {
var c int
isErrorWithMessage(t, ParseWithFuncs(&c, nil), "env: expected a pointer to a Struct")
}
func TestCustomParserError(t *testing.T) {
type foo struct {
name string
}
customParserFunc := func(v string) (interface{}, error) {
return nil, errors.New("something broke")
}
t.Run("single", func(t *testing.T) {
type config struct {
Var foo `env:"VAR"`
}
os.Setenv("VAR", "single")
cfg := &config{}
err := ParseWithFuncs(cfg, map[reflect.Type]ParserFunc{
reflect.TypeOf(foo{}): customParserFunc,
})
isEqual(t, cfg.Var.name, "")
isErrorWithMessage(t, err, `env: parse error on field "Var" of type "env.foo": something broke`)
})
t.Run("slice", func(t *testing.T) {
type config struct {
Var []foo `env:"VAR2"`
}
os.Setenv("VAR2", "slice,slace")
cfg := &config{}
err := ParseWithFuncs(cfg, map[reflect.Type]ParserFunc{
reflect.TypeOf(foo{}): customParserFunc,
})
isEqual(t, cfg.Var, nil)
isErrorWithMessage(t, err, `env: parse error on field "Var" of type "[]env.foo": something broke`)
})
}
func TestCustomParserBasicType(t *testing.T) {
type ConstT int32
type config struct {
Const ConstT `env:"CONST_"`
}
exp := ConstT(123)
os.Setenv("CONST_", fmt.Sprintf("%d", exp))
customParserFunc := func(v string) (interface{}, error) {
i, err := strconv.Atoi(v)
if err != nil {
return nil, err
}
r := ConstT(i)
return r, nil
}
cfg := &config{}
err := ParseWithFuncs(cfg, map[reflect.Type]ParserFunc{
reflect.TypeOf(ConstT(0)): customParserFunc,
})
isNoErr(t, err)
isEqual(t, exp, cfg.Const)
}
func TestCustomParserUint64Alias(t *testing.T) {
type T uint64
var one T = 1
type config struct {
Val T `env:"" envDefault:"1x"`
}
parserCalled := false
tParser := func(value string) (interface{}, error) {
parserCalled = true
trimmed := strings.TrimSuffix(value, "x")
i, err := strconv.Atoi(trimmed)
if err != nil {
return nil, err
}
return T(i), nil
}
cfg := config{}
err := ParseWithFuncs(&cfg, map[reflect.Type]ParserFunc{
reflect.TypeOf(one): tParser,
})
isTrue(t, parserCalled)
isNoErr(t, err)
isEqual(t, T(1), cfg.Val)
}
func TestTypeCustomParserBasicInvalid(t *testing.T) {
type ConstT int32
type config struct {
Const ConstT `env:"CONST_"`
}
os.Setenv("CONST_", "foobar")
customParserFunc := func(_ string) (interface{}, error) {
return nil, errors.New("random error")
}
cfg := &config{}
err := ParseWithFuncs(cfg, map[reflect.Type]ParserFunc{
reflect.TypeOf(ConstT(0)): customParserFunc,
})
isEqual(t, cfg.Const, ConstT(0))
isErrorWithMessage(t, err, `env: parse error on field "Const" of type "env.ConstT": random error`)
}
func TestCustomParserNotCalledForNonAlias(t *testing.T) {
type T uint64
type U uint64
type config struct {
Val uint64 `env:"" envDefault:"33"`
Other U `env:"OTHER" envDefault:"44"`
}
tParserCalled := false
tParser := func(value string) (interface{}, error) {
tParserCalled = true
return T(99), nil
}
cfg := config{}
err := ParseWithFuncs(&cfg, map[reflect.Type]ParserFunc{
reflect.TypeOf(T(0)): tParser,
})
isFalse(t, tParserCalled)
isNoErr(t, err)
isEqual(t, uint64(33), cfg.Val)
isEqual(t, U(44), cfg.Other)
}
func TestCustomParserBasicUnsupported(t *testing.T) {
type ConstT struct {
A int
}
type config struct {
Const ConstT `env:"CONST_"`
}