--- a
+++ b/qiita_pet/test/test_util.py
@@ -0,0 +1,73 @@
+# -----------------------------------------------------------------------------
+# Copyright (c) 2014--, The Qiita Development Team.
+#
+# Distributed under the terms of the BSD 3-clause License.
+#
+# The full license is in the file LICENSE, distributed with this software.
+# -----------------------------------------------------------------------------
+
+from unittest import TestCase, main
+
+from qiita_pet.util import (clean_str, generate_param_str, is_localhost,
+                            convert_text_html, get_network_nodes_edges)
+from qiita_db.software import DefaultParameters
+from qiita_db.artifact import Artifact
+
+
+class TestUtil(TestCase):
+    def test_clean_str(self):
+        obs = clean_str("Remove Spaces From:String")
+        self.assertEqual(obs, "Remove_Spaces_FromString")
+
+    def test_generate_param_str(self):
+        params = DefaultParameters(10)
+        obs = generate_param_str(params)
+        exp = ('<b>Reference:</b> Greengenes 13_8<br/>'
+               '<b>sortmerna_e_value:</b> 1<br/>'
+               '<b>sortmerna_max_pos:</b> 10000<br/>'
+               '<b>similarity:</b> 0.97<br/>'
+               '<b>sortmerna_coverage:</b> 0.97<br/>'
+               '<b>threads:</b> 1')
+        self.assertEqual(obs, exp)
+
+    def test_is_localhost(self):
+        self.assertTrue(is_localhost('127.0.0.1'))
+        self.assertTrue(is_localhost('localhost'))
+        self.assertTrue(is_localhost('127.0.0.1:21174'))
+
+        self.assertFalse(is_localhost('10.0.0.1'))
+        self.assertFalse(is_localhost('10.0.0.1:21174'))
+
+    def test_convert_text_html(self):
+        test = ('<b>This is line</b>\nThis is another\n'
+                'This is a link: http://test.com')
+        exp = ('<b>This is line</b><br/>This is another<br/>'
+               'This is a link: <a href="http://test.com">http://test.com</a>')
+        obs = convert_text_html(test)
+        self.assertEqual(obs, exp)
+
+    def test_get_network_nodes_edges(self):
+        graph = Artifact(1).descendants_with_jobs
+        obs_nodes, obs_edges, obs_wf = get_network_nodes_edges(graph, True)
+        self.assertEqual(len(obs_nodes), 11)
+        self.assertEqual(len([x for x in obs_nodes if x[0] == 'job']), 5)
+        self.assertEqual(len([x for x in obs_nodes if x[0] == 'artifact']), 6)
+        self.assertEqual(len([x for x in obs_nodes if x[0] == 'type']), 0)
+        self.assertEqual(len(obs_edges), 10)
+        self.assertIsNone(obs_wf)
+
+        # This graph only contains one node - check added to make sure that
+        # the graph gets extended accordingly
+        graph = Artifact(6).descendants_with_jobs
+        obs_nodes, obs_edges, obs_wf = get_network_nodes_edges(
+            graph, True, nodes=obs_nodes, edges=obs_edges)
+        self.assertEqual(len(obs_nodes), 12)
+        self.assertEqual(len([x for x in obs_nodes if x[0] == 'job']), 5)
+        self.assertEqual(len([x for x in obs_nodes if x[0] == 'artifact']), 7)
+        self.assertEqual(len([x for x in obs_nodes if x[0] == 'type']), 0)
+        self.assertEqual(len(obs_edges), 10)
+        self.assertIsNone(obs_wf)
+
+
+if __name__ == "__main__":
+    main()