Add otx tests

Signed-off-by: Jay Townsend <townsend891@hotmail.com>

tests/discovery/test_otx.py

@@ -0,0 +1,32 @@
+#!/usr/bin/env python3
+# coding=utf-8
+from theHarvester.lib.core import *
+from theHarvester.discovery import otxsearch
+import requests
+import pytest
+
+
+class TestOtx(object):
+    @staticmethod
+    def domain() -> str:
+        return 'metasploit.com'
+
+    def test_api(self):
+        base_url = f'https://otx.alienvault.com/api/v1/indicators/domain/{TestOtx.domain()}/passive_dns'
+        headers = {'User-Agent': Core.get_user_agent()}
+        request = requests.get(base_url, headers=headers)
+        assert request.status_code == 200
+
+    def test_search(self):
+        search = otxsearch.SearchOtx(TestOtx.domain())
+        search.process()
+        assert type(search.get_hostnames()) == list
+
+    def test_search_no_results(self):
+        search = otxsearch.SearchOtx('radiant.eu')
+        search.process()
+        assert len(search.get_hostnames()) == 0
+
+
+if __name__ == '__main__':
+    pytest.main()