Update code and tests

To write tests for the given code, you can use the `unittest` module in Python. Here's an example set of tests for the provided code:

```python
import sqlite3
import unittest
from unittest.mock import patch
from io import StringIO
from contextlib import redirect_stdout
from sqlite3 import IntegrityError

class TestSQLiteCRUD(unittest.TestCase):

def setUp(self):
self.db = sqlite3.connect(':memory:')
self.db.row_factory = sqlite3.Row
self.db.execute('create table test ( t1 text, i1 int )')

def tearDown(self):
self.db.close()

def test_insert_retrieve(self):
insert(self.db, dict(t1='test_insert', i1=42))
result = dict(retrieve(self.db, 'test_insert'))
self.assertEqual(result, {'t1': 'test_insert', 'i1': 42})

def test_update(self):
insert(self.db, dict(t1='test_update', i1=42))
update(self.db, dict(t1='test_update', i1=99))
result = dict(retrieve(self.db, 'test_update'))
self.assertEqual(result, {'t1': 'test_update', 'i1': 99})

def test_delete(self):
insert(self.db, dict(t1='test_delete', i1=42))
delete(self.db, 'test_delete')
result = retrieve(self.db, 'test_delete')
self.assertIsNone(result)

def test_disp_rows(self):
with patch('sys.stdout', new_callable=StringIO) as mock_stdout:
insert(self.db, dict(t1='disp_row_test', i1=42))
disp_rows(self.db)
output = mock_stdout.getvalue().strip()
self.assertIn('disp_row_test', output)
self.assertIn('42', output)

def test_main_integration(self):
with patch('sys.stdout', new_callable=StringIO) as mock_stdout:
main_output = StringIO()
with redirect_stdout(main_output):
main()
main_output = main_output.getvalue().strip()

self.assertIn('Create table test', main_output)
self.assertIn('Create rows', main_output)
self.assertIn('Retrieve rows', main_output)
self.assertIn('Update rows', main_output)
self.assertIn('Delete rows', main_output)

if __name__ == '__main__':
unittest.main()
```

This test suite covers the basic functionality of the CRUD operations and ensures that the output is as expected.