def test_read_end_stream(self, m):
'''reads the entire table from the database and validates that the
stream returns None to indicate the end'''
mock_recs = [{
'id': 1,
'col1': 'foo1',
'col2': 'bar1'
}, {
'id': 2,
'col1': 'foo2',
'col2': 'bar2'
}, {
'id': 3,
'col1': 'foo3',
'col2': 'bar3'
}]
inst = Postgres(self.source, OPTIONS)
inst.tables = [{'value': 'my_schema.foo_bar'}]
result_order = [mock_recs, []]
m.return_value.cursor.return_value.fetchall.side_effect = result_order
rows = inst.read()
self.assertEqual(len(rows), len(mock_recs))
empty = inst.read()
self.assertEqual(empty, [])
end = inst.read()
self.assertEqual(end, None)
def test_recover_from_state(self, mock_connect, mock_execute, _, __):
"""continues to read a table from the saved state"""
tables = [
{
'value': 'public.test1'
},
{
'value': 'public.test2'
},
{
'value': 'public.test3'
},
]
last_index = 1
self.source['state'] = {'last_index': last_index, 'max_value': 100}
inst = Postgres(self.source, OPTIONS)
inst.tables = tables
cursor_return_value = mock_connect.return_value.cursor.return_value
cursor_return_value.fetchall.return_value = [{
'id': 101
}, {
'id': 102
}, {
'id': 103
}]
inst.read()
first_query = mock_execute.call_args_list[0][0][0]
self.assertTrue(
"\"inckey\" >= 'incval' AND \"inckey\" <= '100'" in first_query)
self.assertTrue('FROM "public"."test2"' in first_query)
def test_connect_other_error(self, mock_connect):
inst = Postgres(self.source, OPTIONS)
inst.tables = [{'value': 'schema.foo'}]
msg = 'something unexpected'
mock_connect.side_effect = psycopg2.OperationalError(msg)
with self.assertRaises(psycopg2.OperationalError):
inst.get_tables()
def test_read(self, m):
'''reads a table from the database and validates that each row
has a __tablename and __schemaname column'''
mock_recs = [{
'id': 1,
'col1': 'foo1',
'col2': 'bar1'
}, {
'id': 2,
'col1': 'foo2',
'col2': 'bar2'
}, {
'id': 3,
'col1': 'foo3',
'col2': 'bar3'
}]
inst = Postgres(self.source, OPTIONS)
inst.tables = [{'value': 'my_schema.foo_bar'}]
m.return_value.cursor.return_value.fetchall.return_value = mock_recs
rows = inst.read()
self.assertEqual(len(rows), len(mock_recs))
for x in range(0, len(rows)):
self.assertEqual(rows[x]['__tablename'], 'foo_bar')
self.assertEqual(rows[x]['__schemaname'], 'my_schema')
def test_connect_auth_error(self, mock_connect):
inst = Postgres(self.source, OPTIONS)
inst.tables = [{'value': 'schema.foo'}]
msg = 'authentication failed'
mock_connect.side_effect = psycopg2.OperationalError(msg)
with self.assertRaises(PanoplyException):
inst.get_tables()
def test_read_retries(self, mock_connect):
inst = Postgres(self.source, OPTIONS)
inst.tables = [{'value': 'my_schema.foo_bar'}]
mock_connect.side_effect = psycopg2.DatabaseError('TestRetiresError')
with self.assertRaises(psycopg2.DatabaseError):
inst.read()
self.assertEqual(mock_connect.call_count, postgres.source.MAX_RETRIES)
def test_incremental(self, mock_connect):
inst = Postgres(self.source, OPTIONS)
inst.tables = [{'value': 'schema.foo'}]
inst.read()
q = ('DECLARE cur CURSOR FOR '
'SELECT * FROM "schema"."foo" WHERE inckey > \'incval\'')
execute_mock = mock_connect.return_value.cursor.return_value.execute
execute_mock.assert_has_calls([mock.call(q)], True)
def test_batch_size(self, mock_connect, mock_execute):
customBatchSize = 42
self.source['__batchSize'] = customBatchSize
inst = Postgres(self.source, OPTIONS)
inst.tables = [{'value': 'my_schema.foo_bar'}]
cursor_return_value = mock_connect.return_value.cursor.return_value
cursor_return_value.fetchall.return_value = self.mock_recs
inst.read()
second_query = mock_execute.call_args_list[1][0][0]
txt = 'FETCH FORWARD %s' % customBatchSize
self.assertTrue(second_query.startswith(txt))
def test_read(self, mock_connect):
'''reads a table from the database and validates that each row
has a __tablename and __schemaname column'''
inst = Postgres(self.source, OPTIONS)
inst.tables = [{'value': 'my_schema.foo_bar'}]
cursor_return_value = mock_connect.return_value.cursor.return_value
cursor_return_value.fetchall.return_value = self.mock_recs
rows = inst.read()
self.assertEqual(len(rows), len(self.mock_recs))
for x in range(0, len(rows)):
self.assertEqual(rows[x]['__tablename'], 'foo_bar')
self.assertEqual(rows[x]['__schemaname'], 'my_schema')
def test_no_state_for_empty_results(self, mock_connect, mock_state):
'''before returning a batch of data, the sources state should be
reported as well as having the state ID appended to each data object'''
inst = Postgres(self.source, OPTIONS)
table_name = 'my_schema.foo_bar'
inst.tables = [{'value': table_name}]
result_order = [[], []]
cursor_return_value = mock_connect.return_value.cursor.return_value
cursor_return_value.fetchall.side_effect = result_order
rows = inst.read()
# State function was called with relevant table name and row count
mock_state.assert_not_called()
def test_recover_from_state(self, mock_connect, mock_execute):
''' continues to read a table from the saved state '''
table_offset = 100
self.source['state'] = {'my_schema.foo_bar': table_offset}
inst = Postgres(self.source, OPTIONS)
inst.tables = [{'value': 'my_schema.foo_bar'}]
cursor_return_value = mock_connect.return_value.cursor.return_value
cursor_return_value.fetchall.return_value = self.mock_recs
inst.read()
first_query = mock_execute.call_args_list[0][0][0]
# The query should use `OFFSET` to skip already collected data
self.assertTrue(first_query.endswith('OFFSET %s' % table_offset))
# Three records were returned so the loaded count should be OFFSET + 3
self.assertEqual(inst.loaded, table_offset + len(self.mock_recs))
def test_read_end_stream(self, mock_connect):
'''reads the entire table from the database and validates that the
stream returns None to indicate the end'''
inst = Postgres(self.source, OPTIONS)
inst.tables = [{'value': 'my_schema.foo_bar'}]
result_order = [self.mock_recs, []]
cursor_return_value = mock_connect.return_value.cursor.return_value
cursor_return_value.fetchall.side_effect = result_order
rows = inst.read()
self.assertEqual(len(rows), len(self.mock_recs))
empty = inst.read()
self.assertEqual(empty, [])
end = inst.read()
self.assertEqual(end, None)
def test_retry_with_last_values(self, mock_connect, mock_metadata, _):
mock_metadata.side_effect = lambda *args: [{
'attname': 'col1',
'indisunique': True,
'indisprimary': True
}, {
'attname': 'col2',
'indisunique': True,
'indisprimary': True
}]
inst = Postgres(self.source, OPTIONS)
inst.tables = [{'value': 'my_schema.foo_bar'}]
inst.batch_size = 1
cursor_execute = mock_connect.return_value.cursor.return_value.execute
cursor_execute.side_effect = [
lambda *args: None,
lambda *args: None,
psycopg2.DatabaseError('TestRetriesError'),
lambda *args: None,
lambda *args: None,
]
cursor_return_value = mock_connect.return_value.cursor.return_value
cursor_return_value.fetchall.return_value = self.mock_recs
# First read no error
inst.read()
# Raise retry error
inst.read()
# Extract mock call arguments
args = mock_connect.return_value.cursor.return_value\
.execute.call_args_list
args = [r[0] for r, _ in args]
args = filter(lambda x: 'DECLARE' in x, args)
# Second DECLARATION of cursor should start from last row fetched
self.assertTrue(
'WHERE ("col1","col2") >= (\'foo3\',\'bar3\')' in args[1])
def test_read_from_other_schema(self, mock_connect, mock_metadata, __):
inst = Postgres(self.source, OPTIONS)
inst.tables = [{
'value': 'my_schema.foo_bar'
}, {
'value': 'your_schema.bar_foo'
}]
cursor_return_value = mock_connect.return_value.cursor.return_value
mock_data = [self.mock_recs[:1], []] * 2
cursor_return_value.fetchall.side_effect = mock_data
expected = [('my_schema', 'foo_bar'), ('my_schema', 'foo_bar'),
('your_schema', 'bar_foo'), ('your_schema', 'bar_foo')]
for expected_schema, expected_table in expected:
inst.read()
_, schema, table = mock_metadata.call_args[0]
self.assertEqual(schema, expected_schema)
self.assertEqual(table, expected_table)
def test_reports_state(self, mock_connect, mock_state):
'''before returning a batch of data, the sources state should be
reported as well as having the state ID appended to each data object'''
inst = Postgres(self.source, OPTIONS)
table_name = 'my_schema.foo_bar'
inst.tables = [{'value': table_name}]
result_order = [self.mock_recs, []]
cursor_return_value = mock_connect.return_value.cursor.return_value
cursor_return_value.fetchall.side_effect = result_order
rows = inst.read()
state_id = rows[0]['__state']
state_obj = dict([(table_name, len(self.mock_recs))])
msg = 'State ID is not the same in all rows!'
for row in rows:
self.assertEqual(row['__state'], state_id, msg)
# State function was called with relevant table name and row count
mock_state.assert_called_with(state_id, state_obj)
def test_query_with_no_keys(self, mock_connect, _):
inst = Postgres(self.source, OPTIONS)
inst.tables = [{'value': 'my_schema.foo_bar'}]
cursor_return_value = mock_connect.return_value.cursor.return_value
cursor_return_value.fetchall.side_effect = [
[],
[
{
'attname': 'id',
'data_type': 'integer'
},
{
'attname': 'name',
'data_type': 'text'
},
],
[],
]
cursor_execute = mock_connect.return_value.cursor.return_value.execute
cursor_execute.return_value = lambda *args: None
inst.read()
# Extract mock call arguments
args = mock_connect.return_value.cursor.return_value \
.execute.call_args_list
args = [r[0] for r, _ in args]
args = filter(lambda x: 'DECLARE' in x, args)
expected = 'DECLARE cur ' \
'CURSOR FOR SELECT * FROM "my_schema"."foo_bar" ' \
"WHERE (\"inckey\" >= 'incval' AND \"inckey\" <= '100') " \
'ORDER BY "id","inckey"'
self.assertEqual(args[0], expected)
def test_connect_error(self, m):
inst = Postgres(self.source, OPTIONS)
inst.tables = [{'value': 'schema.foo'}]
m.side_effect = psycopg2.OperationalError('Mock Error')
with self.assertRaises(PanoplyException):
inst.read()
def test_read_end_stream(self, mock_connect, mock_execute, mock_metadata,
_):
"""reads the entire table from the database and validates that the
stream returns None to indicate the end"""
tables = [
{
'value': 'public.table1'
},
{
'value': 'public.table2'
},
{
'value': 'public.table3'
},
]
mock_metadata.side_effect = [
[{
'attname': 'col1'
}],
[{
'attname': 'col2'
}],
[{
'attname': 'col3'
}],
]
inst = Postgres(self.source, OPTIONS)
inst.tables = tables
result_order = [
self.mock_recs, [], self.mock_recs, [], self.mock_recs, []
]
cursor_return_value = mock_connect.return_value.cursor.return_value
cursor_return_value.fetchall.side_effect = result_order
# First call to read
result = inst.read()
self.assertEqual(len(result), len(self.mock_recs))
query = mock_execute.call_args_list[0][0][0]
expected_query = 'FROM "public"."table1" ' \
'WHERE ("inckey" >= \'incval\' ' \
'AND "inckey" <= \'100\') '\
'ORDER BY "col1","inckey"'
self.assertTrue(expected_query in query)
query = mock_execute.call_args_list[1][0][0]
expected_query = 'FETCH FORWARD'
self.assertTrue(expected_query in query)
# Second call to read
result = inst.read()
self.assertEqual(result, [])
query = mock_execute.call_args_list[2][0][0]
expected_query = 'FETCH FORWARD'
self.assertTrue(expected_query in query)
# Third call to read
result = inst.read()
self.assertEqual(len(result), len(self.mock_recs))
query = mock_execute.call_args_list[3][0][0]
expected_query = 'FROM "public"."table2" ' \
'WHERE ("inckey" >= \'incval\' ' \
'AND "inckey" <= \'100\') '\
'ORDER BY "col2","inckey"'
self.assertTrue(expected_query in query)
query = mock_execute.call_args_list[4][0][0]
expected_query = 'FETCH FORWARD'
self.assertTrue(expected_query in query)
# Fourth call to read
result = inst.read()
self.assertEqual(result, [])
query = mock_execute.call_args_list[5][0][0]
expected_query = 'FETCH FORWARD'
self.assertTrue(expected_query in query)
# Fifth call to read
result = inst.read()
self.assertEqual(len(result), len(self.mock_recs))
query = mock_execute.call_args_list[6][0][0]
expected_query = 'FROM "public"."table3" ' \
'WHERE ("inckey" >= \'incval\' ' \
'AND "inckey" <= \'100\') '\
'ORDER BY "col3","inckey"'
self.assertTrue(expected_query in query)
query = mock_execute.call_args_list[7][0][0]
expected_query = 'FETCH FORWARD'
self.assertTrue(expected_query in query)
# Sixth call to read
result = inst.read()
self.assertEqual(result, [])
query = mock_execute.call_args_list[8][0][0]
expected_query = 'FETCH FORWARD'
self.assertTrue(expected_query in query)
end = inst.read()
self.assertEqual(end, None)