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|
//go:build !windows
package resolvconf
import (
"bytes"
"os"
"strings"
"testing"
"github.com/opencontainers/go-digest"
"gotest.tools/v3/assert"
is "gotest.tools/v3/assert/cmp"
)
func TestGet(t *testing.T) {
actual, err := Get()
if err != nil {
t.Fatal(err)
}
expected, err := os.ReadFile(Path())
if err != nil {
t.Fatal(err)
}
if !bytes.Equal(actual.Content, expected) {
t.Errorf("%s and GetResolvConf have different content.", Path())
}
hash := digest.FromBytes(expected)
if !bytes.Equal(actual.Hash, []byte(hash)) {
t.Errorf("%s and GetResolvConf have different hashes.", Path())
}
}
func TestGetNameservers(t *testing.T) {
for _, tc := range []struct {
input string
result []string
}{
{
input: ``,
},
{
input: `search example.com`,
},
{
input: ` nameserver 1.2.3.4 `,
result: []string{"1.2.3.4"},
},
{
input: `
nameserver 1.2.3.4
nameserver 40.3.200.10
search example.com`,
result: []string{"1.2.3.4", "40.3.200.10"},
},
{
input: `nameserver 1.2.3.4
search example.com
nameserver 4.30.20.100`,
result: []string{"1.2.3.4", "4.30.20.100"},
},
{
input: `search example.com
nameserver 1.2.3.4
#nameserver 4.3.2.1`,
result: []string{"1.2.3.4"},
},
{
input: `search example.com
nameserver 1.2.3.4 # not 4.3.2.1`,
result: []string{"1.2.3.4"},
},
} {
test := GetNameservers([]byte(tc.input), IP)
if !strSlicesEqual(test, tc.result) {
t.Errorf("Wrong nameserver string {%s} should be %v. Input: %s", test, tc.result, tc.input)
}
}
}
func TestGetNameserversAsCIDR(t *testing.T) {
for _, tc := range []struct {
input string
result []string
}{
{
input: ``,
},
{
input: `search example.com`,
},
{
input: ` nameserver 1.2.3.4 `,
result: []string{"1.2.3.4/32"},
},
{
input: `
nameserver 1.2.3.4
nameserver 40.3.200.10
search example.com`,
result: []string{"1.2.3.4/32", "40.3.200.10/32"},
},
{
input: `nameserver 1.2.3.4
search example.com
nameserver 4.30.20.100`,
result: []string{"1.2.3.4/32", "4.30.20.100/32"},
},
{
input: `search example.com
nameserver 1.2.3.4
#nameserver 4.3.2.1`,
result: []string{"1.2.3.4/32"},
},
{
input: `search example.com
nameserver 1.2.3.4 # not 4.3.2.1`,
result: []string{"1.2.3.4/32"},
},
{
input: `nameserver fd6f:c490:ec68::1`,
result: []string{"fd6f:c490:ec68::1/128"},
},
{
input: `nameserver fe80::1234%eth0`,
result: []string{"fe80::1234/128"},
},
} {
test := GetNameserversAsCIDR([]byte(tc.input))
if !strSlicesEqual(test, tc.result) {
t.Errorf("Wrong nameserver string {%s} should be %v. Input: %s", test, tc.result, tc.input)
}
}
}
func TestGetSearchDomains(t *testing.T) {
for _, tc := range []struct {
input string
result []string
}{
{
input: ``,
},
{
input: `# ignored`,
},
{
input: `search example.com`,
result: []string{"example.com"},
},
{
input: `search example.com # notignored`,
result: []string{"example.com", "#", "notignored"},
},
{
input: ` search example.com `,
result: []string{"example.com"},
},
{
input: ` search example.com # notignored`,
result: []string{"example.com", "#", "notignored"},
},
{
input: `search foo.example.com example.com`,
result: []string{"foo.example.com", "example.com"},
},
{
input: ` search foo.example.com example.com `,
result: []string{"foo.example.com", "example.com"},
},
{
input: ` search foo.example.com example.com # notignored`,
result: []string{"foo.example.com", "example.com", "#", "notignored"},
},
{
input: `nameserver 1.2.3.4
search foo.example.com example.com`,
result: []string{"foo.example.com", "example.com"},
},
{
input: `nameserver 1.2.3.4
search dup1.example.com dup2.example.com
search foo.example.com example.com`,
result: []string{"foo.example.com", "example.com"},
},
{
input: `nameserver 1.2.3.4
search foo.example.com example.com
nameserver 4.30.20.100`,
result: []string{"foo.example.com", "example.com"},
},
{
input: `domain an.example`,
result: []string{"an.example"},
},
} {
test := GetSearchDomains([]byte(tc.input))
if !strSlicesEqual(test, tc.result) {
t.Errorf("Wrong search domain string {%s} should be %v. Input: %s", test, tc.result, tc.input)
}
}
}
func TestGetOptions(t *testing.T) {
for _, tc := range []struct {
input string
result []string
}{
{
input: ``,
},
{
input: `# ignored`,
},
{
input: `; ignored`,
},
{
input: `nameserver 1.2.3.4`,
},
{
input: `options opt1`,
result: []string{"opt1"},
},
{
input: `options opt1 # notignored`,
result: []string{"opt1", "#", "notignored"},
},
{
input: `options opt1 ; notignored`,
result: []string{"opt1", ";", "notignored"},
},
{
input: ` options opt1 `,
result: []string{"opt1"},
},
{
input: ` options opt1 # notignored`,
result: []string{"opt1", "#", "notignored"},
},
{
input: `options opt1 opt2 opt3`,
result: []string{"opt1", "opt2", "opt3"},
},
{
input: `options opt1 opt2 opt3 # notignored`,
result: []string{"opt1", "opt2", "opt3", "#", "notignored"},
},
{
input: ` options opt1 opt2 opt3 `,
result: []string{"opt1", "opt2", "opt3"},
},
{
input: ` options opt1 opt2 opt3 # notignored`,
result: []string{"opt1", "opt2", "opt3", "#", "notignored"},
},
{
input: `nameserver 1.2.3.4
options opt1 opt2 opt3`,
result: []string{"opt1", "opt2", "opt3"},
},
{
input: `nameserver 1.2.3.4
options opt1 opt2
options opt3 opt4`,
result: []string{"opt1", "opt2", "opt3", "opt4"},
},
} {
test := GetOptions([]byte(tc.input))
if !strSlicesEqual(test, tc.result) {
t.Errorf("Wrong options string {%s} should be %v. Input: %s", test, tc.result, tc.input)
}
}
}
func strSlicesEqual(a, b []string) bool {
if len(a) != len(b) {
return false
}
for i, v := range a {
if v != b[i] {
return false
}
}
return true
}
func TestBuild(t *testing.T) {
tmpDir := t.TempDir()
file, err := os.CreateTemp(tmpDir, "")
if err != nil {
t.Fatal(err)
}
f, err := Build(file.Name(), []string{"ns1", "ns2", "ns3"}, []string{"search1"}, []string{"opt1"})
if err != nil {
t.Fatal(err)
}
const expected = "search search1\nnameserver ns1\nnameserver ns2\nnameserver ns3\noptions opt1\n"
if !bytes.Equal(f.Content, []byte(expected)) {
t.Errorf("Expected to find '%s' got '%s'", expected, f.Content)
}
content, err := os.ReadFile(file.Name())
if err != nil {
t.Fatal(err)
}
if !bytes.Equal(content, []byte(expected)) {
t.Errorf("Expected to find '%s' got '%s'", expected, content)
}
}
func TestBuildWithZeroLengthDomainSearch(t *testing.T) {
tmpDir := t.TempDir()
file, err := os.CreateTemp(tmpDir, "")
if err != nil {
t.Fatal(err)
}
f, err := Build(file.Name(), []string{"ns1", "ns2", "ns3"}, []string{"."}, []string{"opt1"})
if err != nil {
t.Fatal(err)
}
const expected = "nameserver ns1\nnameserver ns2\nnameserver ns3\noptions opt1\n"
if !bytes.Equal(f.Content, []byte(expected)) {
t.Errorf("Expected to find '%s' got '%s'", expected, f.Content)
}
content, err := os.ReadFile(file.Name())
if err != nil {
t.Fatal(err)
}
if !bytes.Equal(content, []byte(expected)) {
t.Errorf("Expected to find '%s' got '%s'", expected, content)
}
}
func TestBuildWithNoOptions(t *testing.T) {
tmpDir := t.TempDir()
file, err := os.CreateTemp(tmpDir, "")
if err != nil {
t.Fatal(err)
}
f, err := Build(file.Name(), []string{"ns1", "ns2", "ns3"}, []string{"search1"}, []string{})
if err != nil {
t.Fatal(err)
}
const expected = "search search1\nnameserver ns1\nnameserver ns2\nnameserver ns3\n"
if !bytes.Equal(f.Content, []byte(expected)) {
t.Errorf("Expected to find '%s' got '%s'", expected, f.Content)
}
content, err := os.ReadFile(file.Name())
if err != nil {
t.Fatal(err)
}
if !bytes.Equal(content, []byte(expected)) {
t.Errorf("Expected to find '%s' got '%s'", expected, content)
}
}
func TestFilterResolvDNS(t *testing.T) {
testcases := []struct {
name string
input string
ipv6Enabled bool
expOut string
}{
{
name: "No localhost",
input: "nameserver 10.16.60.14\nnameserver 10.16.60.21\n",
expOut: "nameserver 10.16.60.14\nnameserver 10.16.60.21",
},
{
name: "Localhost last",
input: "nameserver 10.16.60.14\nnameserver 10.16.60.21\nnameserver 127.0.0.1\n",
expOut: "nameserver 10.16.60.14\nnameserver 10.16.60.21",
},
{
name: "Localhost middle",
input: "nameserver 10.16.60.14\nnameserver 127.0.0.1\nnameserver 10.16.60.21\n",
expOut: "nameserver 10.16.60.14\nnameserver 10.16.60.21",
},
{
name: "Localhost first",
input: "nameserver 127.0.1.1\nnameserver 10.16.60.14\nnameserver 10.16.60.21\n",
expOut: "nameserver 10.16.60.14\nnameserver 10.16.60.21",
},
{
name: "IPv6 Localhost",
input: "nameserver ::1\nnameserver 10.16.60.14\nnameserver 127.0.2.1\nnameserver 10.16.60.21\n",
expOut: "nameserver 10.16.60.14\nnameserver 10.16.60.21",
},
{
name: "Two IPv6 Localhosts",
input: "nameserver 10.16.60.14\nnameserver ::1\nnameserver 10.16.60.21\nnameserver ::1",
expOut: "nameserver 10.16.60.14\nnameserver 10.16.60.21",
},
{
name: "IPv6 disabled",
input: "nameserver 10.16.60.14\nnameserver 2002:dead:beef::1\nnameserver 10.16.60.21\nnameserver ::1",
expOut: "nameserver 10.16.60.14\nnameserver 10.16.60.21",
},
{
name: "IPv6 link-local disabled",
input: "nameserver 10.16.60.14\nnameserver FE80::BB1%1\nnameserver FE80::BB1%eth0\nnameserver 10.16.60.21",
expOut: "nameserver 10.16.60.14\nnameserver 10.16.60.21",
},
{
name: "IPv6 enabled",
input: "nameserver 10.16.60.14\nnameserver 2002:dead:beef::1\nnameserver 10.16.60.21\nnameserver ::1\n",
ipv6Enabled: true,
expOut: "nameserver 10.16.60.14\nnameserver 2002:dead:beef::1\nnameserver 10.16.60.21",
},
{
// with IPv6 enabled, and no non-localhost servers, Google defaults (both IPv4+IPv6) should be added
name: "localhost only IPv6",
input: "nameserver 127.0.0.1\nnameserver ::1\nnameserver 127.0.2.1",
ipv6Enabled: true,
expOut: "nameserver 8.8.8.8\nnameserver 8.8.4.4\nnameserver 2001:4860:4860::8888\nnameserver 2001:4860:4860::8844",
},
{
// with IPv6 disabled, and no non-localhost servers, Google defaults (only IPv4) should be added
name: "localhost only no IPv6",
input: "nameserver 127.0.0.1\nnameserver ::1\nnameserver 127.0.2.1",
expOut: "nameserver 8.8.8.8\nnameserver 8.8.4.4",
},
}
for _, tc := range testcases {
t.Run(tc.name, func(t *testing.T) {
f, err := FilterResolvDNS([]byte(tc.input), tc.ipv6Enabled)
assert.Check(t, is.Nil(err))
out := strings.TrimSpace(string(f.Content))
assert.Check(t, is.Equal(out, tc.expOut))
})
}
}
|
