Add test for upcoming txt changes

parse_test.go

@@ -890,3 +890,18 @@ func TestTxtEqual(t *testing.T) {
 		t.Logf("\n%s\n%s\n", rr1.String(), rr2.String())
 	}
 }
+func TestTxtLong(t *testing.T) {
+	rr1 := new(TXT)
+	rr1.Hdr = RR_Header{Name: ".", Rrtype: TypeTXT, Class: ClassINET, Ttl: 0}
+	// Make a long txt record, this breaks when sending the packet,
+	// but not earlier.
+	rr1.Txt = []string{"start-"}
+	for i := 0; i < 200; i++ {
+		rr1.Txt[0] += "start-"
+	}
+	str := rr1.String()
+	if len(str) < len(rr1.Txt[0]) {
+		t.Logf("String conversion should just work")
+		t.Fail()
+	}
+}