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package dns
import "testing"
func TestOPTTtl(t *testing.T) {
e := &OPT{}
e.Hdr.Name = "."
e.Hdr.Rrtype = TypeOPT
// verify the default setting of DO=0
if e.Do() {
t.Errorf("DO bit should be zero")
}
// There are 6 possible invocations of SetDo():
//
// 1. Starting with DO=0, using SetDo()
// 2. Starting with DO=0, using SetDo(true)
// 3. Starting with DO=0, using SetDo(false)
// 4. Starting with DO=1, using SetDo()
// 5. Starting with DO=1, using SetDo(true)
// 6. Starting with DO=1, using SetDo(false)
// verify that invoking SetDo() sets DO=1 (TEST #1)
e.SetDo()
if !e.Do() {
t.Errorf("DO bit should be non-zero")
}
// verify that using SetDo(true) works when DO=1 (TEST #5)
e.SetDo(true)
if !e.Do() {
t.Errorf("DO bit should still be non-zero")
}
// verify that we can use SetDo(false) to set DO=0 (TEST #6)
e.SetDo(false)
if e.Do() {
t.Errorf("DO bit should be zero")
}
// verify that if we call SetDo(false) when DO=0 that it is unchanged (TEST #3)
e.SetDo(false)
if e.Do() {
t.Errorf("DO bit should still be zero")
}
// verify that using SetDo(true) works for DO=0 (TEST #2)
e.SetDo(true)
if !e.Do() {
t.Errorf("DO bit should be non-zero")
}
// verify that using SetDo() works for DO=1 (TEST #4)
e.SetDo()
if !e.Do() {
t.Errorf("DO bit should be non-zero")
}
if e.Version() != 0 {
t.Errorf("version should be non-zero")
}
e.SetVersion(42)
if e.Version() != 42 {
t.Errorf("set 42, expected %d, got %d", 42, e.Version())
}
e.SetExtendedRcode(42)
if e.ExtendedRcode() != 42 {
t.Errorf("set 42, expected %d, got %d", 42, e.ExtendedRcode())
}
}
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