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env_test.go
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package env_test
import (
"errors"
"io"
"net"
"strconv"
"testing"
"time"
"go-simpler.org/env"
"go-simpler.org/env/internal/assert"
. "go-simpler.org/env/internal/assert/EF"
)
//go:generate go run -tags=copier go-simpler.org/assert/cmd/[email protected] -dir=internal
func TestLoad(t *testing.T) {
t.Run("invalid argument", func(t *testing.T) {
tests := map[string]any{
"nil": nil,
"not a pointer": struct{}{},
"not a struct pointer": new(int),
"nil struct pointer": (*struct{})(nil),
}
for name, cfg := range tests {
t.Run(name, func(t *testing.T) {
const panicMsg = "env: cfg must be a non-nil struct pointer"
load := func() { _ = env.Load(cfg, &env.Options{Source: env.Map{}}) }
assert.Panics[E](t, load, panicMsg)
usage := func() { env.Usage(cfg, io.Discard) }
assert.Panics[E](t, usage, panicMsg)
})
}
})
t.Run("empty tag name", func(t *testing.T) {
var cfg struct {
Foo int `env:""`
}
load := func() { _ = env.Load(&cfg, &env.Options{Source: env.Map{}}) }
assert.Panics[E](t, load, "env: empty tag name is not allowed")
})
t.Run("invalid tag option", func(t *testing.T) {
var cfg struct {
Foo int `env:"FOO,?"`
}
load := func() { _ = env.Load(&cfg, &env.Options{Source: env.Map{}}) }
assert.Panics[E](t, load, "env: invalid tag option `?`")
})
t.Run("required with default", func(t *testing.T) {
var cfg struct {
Foo int `env:"FOO,required" default:"1"`
}
load := func() { _ = env.Load(&cfg, &env.Options{Source: env.Map{}}) }
assert.Panics[E](t, load, "env: `required` and `default` can't be used simultaneously")
})
t.Run("unsupported type", func(t *testing.T) {
m := env.Map{"FOO": "1+2i"}
var cfg struct {
Foo complex64 `env:"FOO"`
}
load := func() { _ = env.Load(&cfg, &env.Options{Source: m}) }
assert.Panics[E](t, load, "env: unsupported type `complex64`")
})
t.Run("ignored fields", func(t *testing.T) {
m := env.Map{"FOO": "1", "BAR": "2"}
var cfg struct {
foo int `env:"FOO"`
Bar int
}
err := env.Load(&cfg, &env.Options{Source: m})
assert.NoErr[F](t, err)
assert.Equal[E](t, cfg.foo, 0)
assert.Equal[E](t, cfg.Bar, 0)
})
t.Run("all supported types", func(t *testing.T) {
m := env.Map{
"INT": "-1", "INTS": "-1 0",
"INT8": "-8", "INT8S": "-8 0",
"INT16": "-16", "INT16S": "-16 0",
"INT32": "-32", "INT32S": "-32 0",
"INT64": "-64", "INT64S": "-64 0",
"UINT": "1", "UINTS": "0 1",
"UINT8": "8", "UINT8S": "0 8",
"UINT16": "16", "UINT16S": "0 16",
"UINT32": "32", "UINT32S": "0 32",
"UINT64": "64", "UINT64S": "0 64",
"FLOAT32": "0.32", "FLOAT32S": "0.32 0.64",
"FLOAT64": "0.64", "FLOAT64S": "0.64 0.32",
"BOOL": "true", "BOOLS": "true false",
"STRING": "foo", "STRINGS": "foo bar",
"DURATION": "1s", "DURATIONS": "1s 1m",
"IP": "0.0.0.0", "IPS": "0.0.0.0 255.255.255.255",
}
var cfg struct {
Int int `env:"INT"`
Ints []int `env:"INTS"`
Int8 int8 `env:"INT8"`
Int8s []int8 `env:"INT8S"`
Int16 int16 `env:"INT16"`
Int16s []int16 `env:"INT16S"`
Int32 int32 `env:"INT32"`
Int32s []int32 `env:"INT32S"`
Int64 int64 `env:"INT64"`
Int64s []int64 `env:"INT64S"`
Uint uint `env:"UINT"`
Uints []uint `env:"UINTS"`
Uint8 uint8 `env:"UINT8"`
Uint8s []uint8 `env:"UINT8S"`
Uint16 uint16 `env:"UINT16"`
Uint16s []uint16 `env:"UINT16S"`
Uint32 uint32 `env:"UINT32"`
Uint32s []uint32 `env:"UINT32S"`
Uint64 uint64 `env:"UINT64"`
Uint64s []uint64 `env:"UINT64S"`
Float32 float32 `env:"FLOAT32"`
Float32s []float32 `env:"FLOAT32S"`
Float64 float64 `env:"FLOAT64"`
Float64s []float64 `env:"FLOAT64S"`
Bool bool `env:"BOOL"`
Bools []bool `env:"BOOLS"`
String string `env:"STRING"`
Strings []string `env:"STRINGS"`
Duration time.Duration `env:"DURATION"`
Durations []time.Duration `env:"DURATIONS"`
IP net.IP `env:"IP"`
IPs []net.IP `env:"IPS"`
}
err := env.Load(&cfg, &env.Options{Source: m})
assert.NoErr[F](t, err)
assert.Equal[E](t, cfg.Int, -1)
assert.Equal[E](t, cfg.Ints, []int{-1, 0})
assert.Equal[E](t, cfg.Int8, -8)
assert.Equal[E](t, cfg.Int8s, []int8{-8, 0})
assert.Equal[E](t, cfg.Int16, -16)
assert.Equal[E](t, cfg.Int16s, []int16{-16, 0})
assert.Equal[E](t, cfg.Int32, -32)
assert.Equal[E](t, cfg.Int32s, []int32{-32, 0})
assert.Equal[E](t, cfg.Int64, -64)
assert.Equal[E](t, cfg.Int64s, []int64{-64, 0})
assert.Equal[E](t, cfg.Uint, 1)
assert.Equal[E](t, cfg.Uints, []uint{0, 1})
assert.Equal[E](t, cfg.Uint8, 8)
assert.Equal[E](t, cfg.Uint8s, []uint8{0, 8})
assert.Equal[E](t, cfg.Uint16, 16)
assert.Equal[E](t, cfg.Uint16s, []uint16{0, 16})
assert.Equal[E](t, cfg.Uint32, 32)
assert.Equal[E](t, cfg.Uint32s, []uint32{0, 32})
assert.Equal[E](t, cfg.Uint64, 64)
assert.Equal[E](t, cfg.Uint64s, []uint64{0, 64})
assert.Equal[E](t, cfg.Float32, 0.32)
assert.Equal[E](t, cfg.Float32s, []float32{0.32, 0.64})
assert.Equal[E](t, cfg.Float64, 0.64)
assert.Equal[E](t, cfg.Float64s, []float64{0.64, 0.32})
assert.Equal[E](t, cfg.Bool, true)
assert.Equal[E](t, cfg.Bools, []bool{true, false})
assert.Equal[E](t, cfg.String, "foo")
assert.Equal[E](t, cfg.Strings, []string{"foo", "bar"})
assert.Equal[E](t, cfg.Duration, time.Second)
assert.Equal[E](t, cfg.Durations, []time.Duration{time.Second, time.Minute})
assert.Equal[E](t, cfg.IP, net.IPv4zero)
assert.Equal[E](t, cfg.IPs, []net.IP{net.IPv4zero, net.IPv4bcast})
})
t.Run("parsing errors", func(t *testing.T) {
tests := map[string]struct {
src env.Source
checkErr func(error)
}{
"invalid int": {
src: env.Map{"INT": "-"},
checkErr: func(err error) { assert.IsErr[E](t, err, strconv.ErrSyntax) },
},
"invalid uint": {
src: env.Map{"UINT": "-"},
checkErr: func(err error) { assert.IsErr[E](t, err, strconv.ErrSyntax) },
},
"invalid float64": {
src: env.Map{"FLOAT64": "-"},
checkErr: func(err error) { assert.IsErr[E](t, err, strconv.ErrSyntax) },
},
"invalid bool": {
src: env.Map{"BOOL": "-"},
checkErr: func(err error) { assert.IsErr[E](t, err, strconv.ErrSyntax) },
},
"invalid time.Duration": {
src: env.Map{"DURATION": "-"},
checkErr: func(err error) { assert.Equal[E](t, errors.Unwrap(err).Error(), `time: invalid duration "-"`) },
},
"invalid encoding.TextUnmarshaler": {
src: env.Map{"IP": "-"},
checkErr: func(err error) { assert.AsErr[E](t, err, new(*net.ParseError)) },
},
"invalid slice": {
src: env.Map{"IPS": "-"},
checkErr: func(err error) { assert.AsErr[E](t, err, new(*net.ParseError)) },
},
}
for name, test := range tests {
t.Run(name, func(t *testing.T) {
var cfg struct {
Int int `env:"INT"`
Uint uint `env:"UINT"`
Float64 float64 `env:"FLOAT64"`
Bool bool `env:"BOOL"`
Duration time.Duration `env:"DURATION"`
IP net.IP `env:"IP"`
IPs []net.IP `env:"IPS"`
}
err := env.Load(&cfg, &env.Options{Source: test.src})
test.checkErr(err)
})
}
})
}