def test_equals_2(self):
     self.assertEqual(format_duration(62), '1 minute and 2 seconds')
 def test_equals(self):
     self.assertEqual(format_duration(1), '1 second')
 def test_equals_6(self):
     self.assertEqual(format_duration(0), 'now')
 def test_equals_5(self):
     self.assertEqual(format_duration(3662),
                      '1 hour, 1 minute and 2 seconds')
 def test_equals_4(self):
     self.assertEqual(format_duration(3600), '1 hour')
 def test_equals_3(self):
     self.assertEqual(format_duration(120), '2 minutes')