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moby/libnetwork/resolvconf/resolvconf_unix_test.go
Sebastiaan van Stijn 820975595c
libnetwork/resolvconf: improve tests for Build 
- Verify the content to be equal, not "contains"; this output should be
  predictable.
- Also verify the content returned by the function to match.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
2023-04-26 22:49:50 +02:00

427 lines
11 KiB
Go
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//go:build !windows
// +build !windows
package resolvconf
import (
"bytes"
"os"
"testing"
)
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())
}
if !bytes.Equal(actual.Hash, hashData(expected)) {
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"},
},
} {
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 # ignored`,
result: []string{"example.com"},
},
{
input: ` search example.com `,
result: []string{"example.com"},
},
{
input: ` search example.com # ignored`,
result: []string{"example.com"},
},
{
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 # ignored`,
result: []string{"foo.example.com", "example.com"},
},
{
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"},
},
} {
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: `nameserver 1.2.3.4`,
},
{
input: `options opt1`,
result: []string{"opt1"},
},
{
input: `options opt1 # ignored`,
result: []string{"opt1"},
},
{
input: ` options opt1 `,
result: []string{"opt1"},
},
{
input: ` options opt1 # ignored`,
result: []string{"opt1"},
},
{
input: `options opt1 opt2 opt3`,
result: []string{"opt1", "opt2", "opt3"},
},
{
input: `options opt1 opt2 opt3 # ignored`,
result: []string{"opt1", "opt2", "opt3"},
},
{
input: ` options opt1 opt2 opt3 `,
result: []string{"opt1", "opt2", "opt3"},
},
{
input: ` options opt1 opt2 opt3 # ignored`,
result: []string{"opt1", "opt2", "opt3"},
},
{
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{"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) {
ns0 := "nameserver 10.16.60.14\nnameserver 10.16.60.21\n"
if result, _ := FilterResolvDNS([]byte(ns0), false); result != nil {
if ns0 != string(result.Content) {
t.Errorf("Failed No Localhost: expected \n<%s> got \n<%s>", ns0, string(result.Content))
}
}
ns1 := "nameserver 10.16.60.14\nnameserver 10.16.60.21\nnameserver 127.0.0.1\n"
if result, _ := FilterResolvDNS([]byte(ns1), false); result != nil {
if ns0 != string(result.Content) {
t.Errorf("Failed Localhost: expected \n<%s> got \n<%s>", ns0, string(result.Content))
}
}
ns1 = "nameserver 10.16.60.14\nnameserver 127.0.0.1\nnameserver 10.16.60.21\n"
if result, _ := FilterResolvDNS([]byte(ns1), false); result != nil {
if ns0 != string(result.Content) {
t.Errorf("Failed Localhost: expected \n<%s> got \n<%s>", ns0, string(result.Content))
}
}
ns1 = "nameserver 127.0.1.1\nnameserver 10.16.60.14\nnameserver 10.16.60.21\n"
if result, _ := FilterResolvDNS([]byte(ns1), false); result != nil {
if ns0 != string(result.Content) {
t.Errorf("Failed Localhost: expected \n<%s> got \n<%s>", ns0, string(result.Content))
}
}
ns1 = "nameserver ::1\nnameserver 10.16.60.14\nnameserver 127.0.2.1\nnameserver 10.16.60.21\n"
if result, _ := FilterResolvDNS([]byte(ns1), false); result != nil {
if ns0 != string(result.Content) {
t.Errorf("Failed Localhost: expected \n<%s> got \n<%s>", ns0, string(result.Content))
}
}
ns1 = "nameserver 10.16.60.14\nnameserver ::1\nnameserver 10.16.60.21\nnameserver ::1"
if result, _ := FilterResolvDNS([]byte(ns1), false); result != nil {
if ns0 != string(result.Content) {
t.Errorf("Failed Localhost: expected \n<%s> got \n<%s>", ns0, string(result.Content))
}
}
// with IPv6 disabled (false param), the IPv6 nameserver should be removed
ns1 = "nameserver 10.16.60.14\nnameserver 2002:dead:beef::1\nnameserver 10.16.60.21\nnameserver ::1"
if result, _ := FilterResolvDNS([]byte(ns1), false); result != nil {
if ns0 != string(result.Content) {
t.Errorf("Failed Localhost+IPv6 off: expected \n<%s> got \n<%s>", ns0, string(result.Content))
}
}
// with IPv6 disabled (false param), the IPv6 link-local nameserver with zone ID should be removed
ns1 = "nameserver 10.16.60.14\nnameserver FE80::BB1%1\nnameserver FE80::BB1%eth0\nnameserver 10.16.60.21\n"
if result, _ := FilterResolvDNS([]byte(ns1), false); result != nil {
if ns0 != string(result.Content) {
t.Errorf("Failed Localhost+IPv6 off: expected \n<%s> got \n<%s>", ns0, string(result.Content))
}
}
// with IPv6 enabled, the IPv6 nameserver should be preserved
ns0 = "nameserver 10.16.60.14\nnameserver 2002:dead:beef::1\nnameserver 10.16.60.21\n"
ns1 = "nameserver 10.16.60.14\nnameserver 2002:dead:beef::1\nnameserver 10.16.60.21\nnameserver ::1"
if result, _ := FilterResolvDNS([]byte(ns1), true); result != nil {
if ns0 != string(result.Content) {
t.Errorf("Failed Localhost+IPv6 on: expected \n<%s> got \n<%s>", ns0, string(result.Content))
}
}
// with IPv6 enabled, and no non-localhost servers, Google defaults (both IPv4+IPv6) should be added
ns0 = "\nnameserver 8.8.8.8\nnameserver 8.8.4.4\nnameserver 2001:4860:4860::8888\nnameserver 2001:4860:4860::8844"
ns1 = "nameserver 127.0.0.1\nnameserver ::1\nnameserver 127.0.2.1"
if result, _ := FilterResolvDNS([]byte(ns1), true); result != nil {
if ns0 != string(result.Content) {
t.Errorf("Failed no Localhost+IPv6 enabled: expected \n<%s> got \n<%s>", ns0, string(result.Content))
}
}
// with IPv6 disabled, and no non-localhost servers, Google defaults (only IPv4) should be added
ns0 = "\nnameserver 8.8.8.8\nnameserver 8.8.4.4"
ns1 = "nameserver 127.0.0.1\nnameserver ::1\nnameserver 127.0.2.1"
if result, _ := FilterResolvDNS([]byte(ns1), false); result != nil {
if ns0 != string(result.Content) {
t.Errorf("Failed no Localhost+IPv6 enabled: expected \n<%s> got \n<%s>", ns0, string(result.Content))
}
}
}
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