--- /dev/null
+#!/usr/bin/env python
+
+# All rights reserved. This program and the accompanying materials
+# are made available under the terms of the Apache License, Version 2.0
+# which accompanies this distribution, and is available at
+# http://www.apache.org/licenses/LICENSE-2.0
+
+import logging
+import unittest
+
+import mock
+
+from functest.ci import tier_builder
+
+
+class TierBuilderTesting(unittest.TestCase):
+
+    logging.disable(logging.CRITICAL)
+
+    def setUp(self):
+        self.dependency = {'installer': 'test_installer',
+                           'scenario': 'test_scenario'}
+
+        self.testcase = {'dependencies': self.dependency,
+                         'name': 'test_name',
+                         'criteria': 'test_criteria',
+                         'blocking': 'test_blocking',
+                         'clean_flag': 'test_clean_flag',
+                         'description': 'test_desc'}
+
+        self.dic_tier = {'name': 'test_tier',
+                         'order': 'test_order',
+                         'ci_loop': 'test_ci_loop',
+                         'description': 'test_desc',
+                         'testcases': [self.testcase]}
+
+        self.mock_yaml = mock.Mock()
+        attrs = {'get.return_value': [self.dic_tier]}
+        self.mock_yaml.configure_mock(**attrs)
+
+        with mock.patch('functest.ci.tier_builder.yaml.safe_load',
+                        return_value=self.mock_yaml), \
+                mock.patch('__builtin__.open', mock.mock_open()):
+            self.tierbuilder = tier_builder.TierBuilder('test_installer',
+                                                        'test_scenario',
+                                                        'testcases_file')
+        self.tier_obj = self.tierbuilder.tier_objects[0]
+
+    def test_get_tiers(self):
+        self.assertEqual(self.tierbuilder.get_tiers(),
+                         [self.tier_obj])
+
+    def test_get_tier_names(self):
+        self.assertEqual(self.tierbuilder.get_tier_names(),
+                         ['test_tier'])
+
+    def test_get_tier_present_tier(self):
+        self.assertEqual(self.tierbuilder.get_tier('test_tier'),
+                         self.tier_obj)
+
+    def test_get_tier_missing_tier(self):
+        self.assertEqual(self.tierbuilder.get_tier('test_tier2'),
+                         None)
+
+    def test_get_test_present_test(self):
+        self.assertEqual(self.tierbuilder.get_test('test_name'),
+                         self.tier_obj.get_test('test_name'))
+
+    def test_get_test_missing_test(self):
+        self.assertEqual(self.tierbuilder.get_test('test_name2'),
+                         None)
+
+    def test_get_tests_present_tier(self):
+        self.assertEqual(self.tierbuilder.get_tests('test_tier'),
+                         self.tier_obj.tests_array)
+
+    def test_get_tests_missing_tier(self):
+        self.assertEqual(self.tierbuilder.get_tests('test_tier2'),
+                         None)
+
+
+if __name__ == "__main__":
+    unittest.main(verbosity=2)