package cdns

import (
	"reflect"
	"testing"
)

func TestResolversFromEnv(t *testing.T) {
	t.Setenv("RSMON_DNS_RESOLVERS", " 188.93.17.19, 2001:db8::53, invalid ")

	got := resolversFromEnv()
	want := []string{"188.93.17.19", "2001:db8::53"}
	if !reflect.DeepEqual(got, want) {
		t.Fatalf("resolversFromEnv() = %v, want %v", got, want)
	}
}

func TestResolversFromEnvFallsBackToDefaults(t *testing.T) {
	t.Setenv("RSMON_DNS_RESOLVERS", "not-an-address")

	got := resolversFromEnv()
	want := []string{"188.93.17.19", "188.93.16.19", "82.117.245.122"}
	if !reflect.DeepEqual(got, want) {
		t.Fatalf("resolversFromEnv() = %v, want %v", got, want)
	}
}