refactor dnscrypt parse

add test

testing/test_gfwlist_to_dns.py

@@ -0,0 +1,19 @@
+import unittest
+
+from gfwlist_to_dns import get_dnsmasq_text, get_smartdns_domain_set
+
+
+class MyTestCase(unittest.TestCase):
+    def test_get_dnsmasq_text(self):
+        dnsmasq_text = get_dnsmasq_text()
+        # print(dnsmasq_text)
+        self.assertIsInstance(dnsmasq_text, str)
+
+    def test_get_smartdns_domain_set(self):
+        domain_set = get_smartdns_domain_set()
+        # print(domain_set)
+        self.assertIsInstance(domain_set, str)
+
+
+if __name__ == '__main__':
+    unittest.main()