// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause

package hostinfo

import (
	"encoding/json"
	"strings"
	"testing"
)

func TestNew(t *testing.T) {
	hi := New()
	if hi == nil {
		t.Fatal("no Hostinfo")
	}
	j, err := json.MarshalIndent(hi, "  ", "")
	if err != nil {
		t.Fatal(err)
	}
	t.Logf("Got: %s", j)
}

// TestGetHostname asserts that GetHostname always returns a non-empty string.
func TestGetHostname(t *testing.T) {
	h := GetHostname()
	if h == "" {
		t.Fatalf("empty hostname")
	}
	t.Logf("Got: %s", h)
}

func TestOSVersion(t *testing.T) {
	if osVersion == nil {
		t.Skip("not available for OS")
	}
	t.Logf("Got: %#q", osVersion())
}

func TestEtcAptSourceFileIsDisabled(t *testing.T) {
	tests := []struct {
		name string
		in   string
		want bool
	}{
		{"empty", "", false},
		{"normal", "deb foo\n", false},
		{"normal-commented", "# deb foo\n", false},
		{"normal-disabled-by-ubuntu", "# deb foo # disabled on upgrade to dingus\n", true},
		{"normal-disabled-then-uncommented", "deb foo # disabled on upgrade to dingus\n", false},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			got := etcAptSourceFileIsDisabled(strings.NewReader(tt.in))
			if got != tt.want {
				t.Errorf("got %v; want %v", got, tt.want)
			}
		})
	}
}