def test_single_chapter_ref(self):
        # multi-chapter book
        self.assertEqual(f('John 1:1-51'), 'John 1')
        self.assertEqual(f('John 1'), 'John 1')
        self.assertEqual(f('John 2:1-25'), 'John 2')
        self.assertEqual(f('John 2'), 'John 2')
for multi-chapter books, output should be
dataset/ETHPy150Open davisd/python-scriptures/scriptures/tests/test_reference_to_string.py/TestReferenceToSting.test_single_chapter_ref