wip: migrate to mono-repo. SPN has already been moved to spn/

service/network/netutils/dns_test.go

@@ -0,0 +1,47 @@
+package netutils
+
+import "testing"
+
+func testDomainValidity(t *testing.T, domain string, isValid bool) {
+	t.Helper()
+
+	if IsValidFqdn(domain) != isValid {
+		t.Errorf("domain %s failed check: was valid=%v, expected valid=%v", domain, IsValidFqdn(domain), isValid)
+	}
+}
+
+func TestDNSValidation(t *testing.T) {
+	t.Parallel()
+
+	// valid
+	testDomainValidity(t, ".", true)
+	testDomainValidity(t, "at.", true)
+	testDomainValidity(t, "orf.at.", true)
+	testDomainValidity(t, "www.orf.at.", true)
+	testDomainValidity(t, "a.b.c.d.e.f.g.h.i.j.k.l.m.n.o.p.q.r.s.t.u.v.x.y.z.example.org.", true)
+	testDomainValidity(t, "a_a.com.", true)
+	testDomainValidity(t, "a-a.com.", true)
+	testDomainValidity(t, "a_a.com.", true)
+	testDomainValidity(t, "a-a.com.", true)
+	testDomainValidity(t, "xn--a.com.", true)
+	testDomainValidity(t, "xn--asdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasd.com.", true)
+
+	// maybe valid
+	testDomainValidity(t, "-.com.", true)
+	testDomainValidity(t, "_.com.", true)
+	testDomainValidity(t, "a_.com.", true)
+	testDomainValidity(t, "a-.com.", true)
+	testDomainValidity(t, "_a.com.", true)
+	testDomainValidity(t, "-a.com.", true)
+
+	// invalid
+	testDomainValidity(t, ".com.", false)
+	testDomainValidity(t, ".com.", false)
+	testDomainValidity(t, "xn--asdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdf.com.", false)
+	testDomainValidity(t, "asdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdf.com.", false)
+	testDomainValidity(t, "asdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdf.com.", false)
+	testDomainValidity(t, "asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.asdf.as.com.", false)
+
+	// real world examples
+	testDomainValidity(t, "iuqerfsodp9ifjaposdfjhgosurijfaewrwergwea.com.", true)
+}