77 lines
1.8 KiB
Go
77 lines
1.8 KiB
Go
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package resolver_test
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import (
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"context"
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"errors"
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"strings"
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"testing"
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"github.com/google/go-cmp/cmp"
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"github.com/ooni/probe-cli/v3/internal/engine/netx/resolver"
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)
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var ErrUnexpectedPunycode = errors.New("unexpected punycode value")
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type CheckIDNAResolver struct {
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Addresses []string
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Error error
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Expect string
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}
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func (resolv CheckIDNAResolver) LookupHost(ctx context.Context, hostname string) ([]string, error) {
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if resolv.Error != nil {
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return nil, resolv.Error
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}
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if hostname != resolv.Expect {
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return nil, ErrUnexpectedPunycode
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}
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return resolv.Addresses, nil
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}
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func (r CheckIDNAResolver) Network() string {
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return "checkidna"
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}
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func (r CheckIDNAResolver) Address() string {
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return ""
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}
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func TestIDNAResolverSuccess(t *testing.T) {
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expectedIPs := []string{"77.88.55.66"}
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resolv := resolver.IDNAResolver{Resolver: CheckIDNAResolver{
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Addresses: expectedIPs,
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Expect: "xn--d1acpjx3f.xn--p1ai",
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}}
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addrs, err := resolv.LookupHost(context.Background(), "яндекс.рф")
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if err != nil {
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t.Fatal(err)
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}
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if diff := cmp.Diff(expectedIPs, addrs); diff != "" {
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t.Fatal(diff)
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}
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}
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func TestIDNAResolverFailure(t *testing.T) {
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resolv := resolver.IDNAResolver{Resolver: CheckIDNAResolver{
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Error: errors.New("we should not arrive here"),
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}}
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// See https://www.farsightsecurity.com/blog/txt-record/punycode-20180711/
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addrs, err := resolv.LookupHost(context.Background(), "xn--0000h")
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if err == nil || !strings.HasPrefix(err.Error(), "idna: invalid label") {
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t.Fatal("not the error we expected")
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}
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if addrs != nil {
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t.Fatal("expected no response here")
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}
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}
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func TestIDNAResolverTransportOK(t *testing.T) {
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resolv := resolver.IDNAResolver{Resolver: CheckIDNAResolver{}}
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if resolv.Network() != "idna" {
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t.Fatal("invalid network")
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}
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if resolv.Address() != "" {
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t.Fatal("invalid address")
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}
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}
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