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package kong_test
import (
"encoding/json"
"os"
"testing"
"github.com/alecthomas/assert/v2"
"github.com/alecthomas/kong"
)
func TestMultipleConfigLoading(t *testing.T) {
var cli struct {
Flag string `json:"flag,omitempty"`
}
cli.Flag = "first"
first, cleanFirst := makeConfig(t, &cli)
defer cleanFirst()
cli.Flag = ""
second, cleanSecond := makeConfig(t, &cli)
defer cleanSecond()
p := mustNew(t, &cli, kong.Configuration(kong.JSON, first, second))
_, err := p.Parse(nil)
assert.NoError(t, err)
assert.Equal(t, "first", cli.Flag)
}
func TestConfigValidation(t *testing.T) {
var cli struct {
Flag string `json:"flag,omitempty" enum:"valid" required:""`
}
cli.Flag = "invalid"
conf, cleanConf := makeConfig(t, &cli)
defer cleanConf()
p := mustNew(t, &cli, kong.Configuration(kong.JSON, conf))
_, err := p.Parse(nil)
assert.Error(t, err)
}
func makeConfig(t *testing.T, config interface{}) (path string, cleanup func()) {
t.Helper()
w, err := os.CreateTemp("", "")
assert.NoError(t, err)
defer w.Close()
err = json.NewEncoder(w).Encode(config)
assert.NoError(t, err)
return w.Name(), func() { os.Remove(w.Name()) }
}
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