Unit tests

Merge after merging cleanup and python_2to3 branches to master.

tests/test_bline.py

@@ -6,19 +6,18 @@
 import unittest
 import sys
 
-try:
-    import bline
-except ImportError:
-     pass
+from unittest.mock import patch
+
 
 class TestBline(unittest.TestCase):
     """Tests for `bline` package."""
 
-    def setUp(self):
-        """Set up test fixtures, if any."""
-
-    def tearDown(self):
-        """Tear down test fixtures, if any."""
-
     def test_import(self):
-        self.assertTrue('bline' in sys.modules, "Bline import failed!")
+        """Test bline import"""
+        with patch.object(sys, 'argv', ['bline']):
+            with self.assertRaises(SystemExit):
+                try:
+                    import bline.bline as bp
+                    self.assertTrue(bp.PROG_NAME, 'BLINE')
+                except ImportError:
+                    self.fail('Failed to import bline!')