package config

import (
	"flag"
	"os"
	"testing"
)

func TestInit(t *testing.T) {
	was := os.Args[:]
	os.Args = []string{"program"}
	flag.CommandLine = flag.NewFlagSet(os.Args[0], flag.ExitOnError)
	defer func() {
		os.Args = was[:]
	}()

	if err := Init(); err != nil {
		t.Errorf("failed to init: %v", err)
	}
}

func TestFromFile(t *testing.T) {
	was := os.Args[:]
	os.Args = []string{"program"}
	flag.CommandLine = flag.NewFlagSet(os.Args[0], flag.ExitOnError)
	defer func() {
		os.Args = was[:]
	}()

	if err := fromFile(); err != nil {
		t.Errorf("failed from file: %v", err)
	}
}

func TestFromFlags(t *testing.T) {
	was := os.Args[:]
	os.Args = []string{"program"}
	flag.CommandLine = flag.NewFlagSet(os.Args[0], flag.ExitOnError)
	defer func() {
		os.Args = was[:]
	}()

	if err := fromFlags(); err != nil {
		t.Errorf("failed from flags: %v", err)
	}
}