def test_query_default(self):
query = Query()
self.assertEqual(query.get_select_expression(), [])
self.assertEqual(query.get_aggregate_function(), '')
self.assertEqual(query.get_table(), '')
self.assertEqual(query.get_where_clause(), [])
self.assertEqual(query.get_result(), [])
def test_query_setters(self):
query = Query()
query.set_select_expression(['country', 'first_name']),
query.set_aggregate_function('COUNT(*)'),
query.set_table('table_name'),
query.add_where_clause('', 'country', 'USA'),
query.set_result([3]),
self.assertEqual(query.get_select_expression(), ['country', 'first_name'])
self.assertEqual(query.get_aggregate_function(), 'COUNT(*)')
self.assertEqual(query.get_table(), 'table_name')
self.assertEqual(query.get_where_clause(), [('', 'country', 'USA')])
self.assertEqual(query.get_result(), [3])
def test_table_selects_simple_query_with_one_field(self):
table = Table('table_name', [
['id', 'first_name', 'last_name', 'country', 'year_of_birth', 'company'],
['1', 'John', 'Carmack', 'USA', '1970', 'id Software'],
['2', 'Jonn', 'Romero', 'USA', '1967', 'id Software'],
['3', 'Elon', 'Musk', 'USA', '1971', 'Tesla'],
['4', 'Damon', 'Hill', 'UK', '1960', 'Williams']
])
query = Query()
query.get_select_expression = MagicMock(return_value=['id'])
query.get_aggregate_function = MagicMock(return_value='')
query.get_where_clause = MagicMock(return_value=[])
self.assertEqual(table.select_rows(query), [['1'], ['2'], ['3'], ['4']])
def select_rows(self, query: Query) -> list:
selected = []
keys = self.__get_keys(query.get_select_expression())
for row in self.__rows:
formed_row = []
if self.__is_satisfied_by_where_clause(row,
query.get_where_clause()):
if query.get_aggregate_function() != '':
if query.get_aggregate_function() == 'COUNT(*)':
formed_row = row
else:
for key in keys:
formed_row.append(row[key])
selected.append(formed_row)
if query.get_aggregate_function() != '':
return [len(selected)]
return selected