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package dns
import (
"io/ioutil"
"os"
"path/filepath"
"testing"
)
const normal string = `
# Comment
domain somedomain.com
nameserver 10.28.10.2
nameserver 11.28.10.1
`
const missingNewline string = `
domain somedomain.com
nameserver 10.28.10.2
nameserver 11.28.10.1` // <- NOTE: NO newline.
func testConfig(t *testing.T, data string) {
tempDir, err := ioutil.TempDir("", "")
if err != nil {
t.Fatalf("tempDir: %v", err)
}
defer os.RemoveAll(tempDir)
path := filepath.Join(tempDir, "resolv.conf")
if err := ioutil.WriteFile(path, []byte(data), 0644); err != nil {
t.Fatalf("writeFile: %v", err)
}
cc, err := ClientConfigFromFile(path)
if err != nil {
t.Errorf("error parsing resolv.conf: %v", err)
}
if l := len(cc.Servers); l != 2 {
t.Errorf("incorrect number of nameservers detected: %d", l)
}
if l := len(cc.Search); l != 1 {
t.Errorf("domain directive not parsed correctly: %v", cc.Search)
} else {
if cc.Search[0] != "somedomain.com" {
t.Errorf("domain is unexpected: %v", cc.Search[0])
}
}
}
func TestNameserver(t *testing.T) { testConfig(t, normal) }
func TestMissingFinalNewLine(t *testing.T) { testConfig(t, missingNewline) }
func TestNameList(t *testing.T) {
cfg := ClientConfig{
Ndots: 1,
}
// fqdn should be only result returned
names := cfg.NameList("miek.nl.")
if len(names) != 1 {
t.Errorf("NameList returned != 1 names: %v", names)
} else if names[0] != "miek.nl." {
t.Errorf("NameList didn't return sent fqdn domain: %v", names[0])
}
cfg.Search = []string{
"test",
}
// Sent domain has NDots and search
names = cfg.NameList("miek.nl")
if len(names) != 2 {
t.Errorf("NameList returned != 2 names: %v", names)
} else if names[0] != "miek.nl." {
t.Errorf("NameList didn't return sent domain first: %v", names[0])
} else if names[1] != "miek.nl.test." {
t.Errorf("NameList didn't return search last: %v", names[1])
}
cfg.Ndots = 2
// Sent domain has less than NDots and search
names = cfg.NameList("miek.nl")
if len(names) != 2 {
t.Errorf("NameList returned != 2 names: %v", names)
} else if names[0] != "miek.nl.test." {
t.Errorf("NameList didn't return search first: %v", names[0])
} else if names[1] != "miek.nl." {
t.Errorf("NameList didn't return sent domain last: %v", names[1])
}
}
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