/
test_dbapi__helpers.py
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test_dbapi__helpers.py
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# Copyright 2017 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import datetime
import decimal
import math
import operator as op
import unittest
try:
import pyarrow
except ImportError: # pragma: NO COVER
pyarrow = None
import google.cloud._helpers
from google.cloud.bigquery import table
from google.cloud.bigquery.dbapi import _helpers
from google.cloud.bigquery.dbapi import exceptions
from tests.unit.helpers import _to_pyarrow
class TestQueryParameters(unittest.TestCase):
def test_scalar_to_query_parameter(self):
expected_types = [
(True, "BOOL"),
(False, "BOOL"),
(123, "INT64"),
(-123456789, "INT64"),
(1.25, "FLOAT64"),
(b"I am some bytes", "BYTES"),
("I am a string", "STRING"),
(datetime.date(2017, 4, 1), "DATE"),
(datetime.time(12, 34, 56), "TIME"),
(datetime.datetime(2012, 3, 4, 5, 6, 7), "DATETIME"),
(
datetime.datetime(
2012, 3, 4, 5, 6, 7, tzinfo=google.cloud._helpers.UTC
),
"TIMESTAMP",
),
(decimal.Decimal("1.25"), "NUMERIC"),
(decimal.Decimal("9.9999999999999999999999999999999999999E+28"), "NUMERIC"),
(decimal.Decimal("1.0E+29"), "BIGNUMERIC"), # more than max NUMERIC value
(decimal.Decimal("1.123456789"), "NUMERIC"),
(decimal.Decimal("1.1234567891"), "BIGNUMERIC"), # scale > 9
(decimal.Decimal("12345678901234567890123456789.012345678"), "NUMERIC"),
(
decimal.Decimal("12345678901234567890123456789012345678"),
"BIGNUMERIC", # larger than max NUMERIC value, despite precision <=38
),
]
for value, expected_type in expected_types:
msg = "value: {} expected_type: {}".format(value, expected_type)
parameter = _helpers.scalar_to_query_parameter(value)
self.assertIsNone(parameter.name, msg=msg)
self.assertEqual(parameter.type_, expected_type, msg=msg)
self.assertEqual(parameter.value, value, msg=msg)
named_parameter = _helpers.scalar_to_query_parameter(value, name="myvar")
self.assertEqual(named_parameter.name, "myvar", msg=msg)
self.assertEqual(named_parameter.type_, expected_type, msg=msg)
self.assertEqual(named_parameter.value, value, msg=msg)
def test_decimal_to_query_parameter(self): # TODO: merge with previous test
expected_types = [
(decimal.Decimal("9.9999999999999999999999999999999999999E+28"), "NUMERIC"),
(decimal.Decimal("1.0E+29"), "BIGNUMERIC"), # more than max value
(decimal.Decimal("1.123456789"), "NUMERIC"),
(decimal.Decimal("1.1234567891"), "BIGNUMERIC"), # scale > 9
(decimal.Decimal("12345678901234567890123456789.012345678"), "NUMERIC"),
(
decimal.Decimal("12345678901234567890123456789012345678"),
"BIGNUMERIC", # larger than max size, even if precision <=38
),
]
for value, expected_type in expected_types:
msg = f"value: {value} expected_type: {expected_type}"
parameter = _helpers.scalar_to_query_parameter(value)
self.assertIsNone(parameter.name, msg=msg)
self.assertEqual(parameter.type_, expected_type, msg=msg)
self.assertEqual(parameter.value, value, msg=msg)
named_parameter = _helpers.scalar_to_query_parameter(value, name="myvar")
self.assertEqual(named_parameter.name, "myvar", msg=msg)
self.assertEqual(named_parameter.type_, expected_type, msg=msg)
self.assertEqual(named_parameter.value, value, msg=msg)
def test_scalar_to_query_parameter_w_unexpected_type(self):
with self.assertRaises(exceptions.ProgrammingError):
_helpers.scalar_to_query_parameter(value={"a": "dictionary"})
def test_scalar_to_query_parameter_w_special_floats(self):
nan_parameter = _helpers.scalar_to_query_parameter(float("nan"))
self.assertTrue(math.isnan(nan_parameter.value))
self.assertEqual(nan_parameter.type_, "FLOAT64")
inf_parameter = _helpers.scalar_to_query_parameter(float("inf"))
self.assertTrue(math.isinf(inf_parameter.value))
self.assertEqual(inf_parameter.type_, "FLOAT64")
def test_array_to_query_parameter_valid_argument(self):
expected_types = [
([True, False], "BOOL"),
([123, -456, 0], "INT64"),
([1.25, 2.50], "FLOAT64"),
([decimal.Decimal("1.25")], "NUMERIC"),
([decimal.Decimal("{d38}.{d38}".format(d38="9" * 38))], "BIGNUMERIC"),
([b"foo", b"bar"], "BYTES"),
(["foo", "bar"], "STRING"),
([datetime.date(2017, 4, 1), datetime.date(2018, 4, 1)], "DATE"),
([datetime.time(12, 34, 56), datetime.time(10, 20, 30)], "TIME"),
(
[
datetime.datetime(2012, 3, 4, 5, 6, 7),
datetime.datetime(2013, 1, 1, 10, 20, 30),
],
"DATETIME",
),
(
[
datetime.datetime(
2012, 3, 4, 5, 6, 7, tzinfo=google.cloud._helpers.UTC
),
datetime.datetime(
2013, 1, 1, 10, 20, 30, tzinfo=google.cloud._helpers.UTC
),
],
"TIMESTAMP",
),
]
for values, expected_type in expected_types:
msg = "value: {} expected_type: {}".format(values, expected_type)
parameter = _helpers.array_to_query_parameter(values)
self.assertIsNone(parameter.name, msg=msg)
self.assertEqual(parameter.array_type, expected_type, msg=msg)
self.assertEqual(parameter.values, values, msg=msg)
named_param = _helpers.array_to_query_parameter(values, name="my_param")
self.assertEqual(named_param.name, "my_param", msg=msg)
self.assertEqual(named_param.array_type, expected_type, msg=msg)
self.assertEqual(named_param.values, values, msg=msg)
def test_array_to_query_parameter_empty_argument(self):
with self.assertRaises(exceptions.ProgrammingError):
_helpers.array_to_query_parameter([])
def test_array_to_query_parameter_unsupported_sequence(self):
unsupported_iterables = [{10, 20, 30}, "foo", b"bar", bytearray([65, 75, 85])]
for iterable in unsupported_iterables:
with self.assertRaises(exceptions.ProgrammingError):
_helpers.array_to_query_parameter(iterable)
def test_array_to_query_parameter_sequence_w_invalid_elements(self):
with self.assertRaises(exceptions.ProgrammingError):
_helpers.array_to_query_parameter([object(), 2, 7])
def test_to_query_parameters_w_dict(self):
parameters = {"somebool": True, "somestring": "a-string-value"}
query_parameters = _helpers.to_query_parameters(parameters)
query_parameter_tuples = []
for param in query_parameters:
query_parameter_tuples.append((param.name, param.type_, param.value))
self.assertSequenceEqual(
sorted(query_parameter_tuples),
sorted(
[
("somebool", "BOOL", True),
("somestring", "STRING", "a-string-value"),
]
),
)
def test_to_query_parameters_w_dict_array_param(self):
parameters = {"somelist": [10, 20]}
query_parameters = _helpers.to_query_parameters(parameters)
self.assertEqual(len(query_parameters), 1)
param = query_parameters[0]
self.assertEqual(param.name, "somelist")
self.assertEqual(param.array_type, "INT64")
self.assertEqual(param.values, [10, 20])
def test_to_query_parameters_w_dict_dict_param(self):
parameters = {"my_param": {"foo": "bar"}}
with self.assertRaises(NotImplementedError):
_helpers.to_query_parameters(parameters)
def test_to_query_parameters_w_list(self):
parameters = [True, "a-string-value"]
query_parameters = _helpers.to_query_parameters(parameters)
query_parameter_tuples = []
for param in query_parameters:
query_parameter_tuples.append((param.name, param.type_, param.value))
self.assertSequenceEqual(
sorted(query_parameter_tuples),
sorted([(None, "BOOL", True), (None, "STRING", "a-string-value")]),
)
def test_to_query_parameters_w_list_array_param(self):
parameters = [[10, 20]]
query_parameters = _helpers.to_query_parameters(parameters)
self.assertEqual(len(query_parameters), 1)
param = query_parameters[0]
self.assertIsNone(param.name)
self.assertEqual(param.array_type, "INT64")
self.assertEqual(param.values, [10, 20])
def test_to_query_parameters_w_list_dict_param(self):
parameters = [{"foo": "bar"}]
with self.assertRaises(NotImplementedError):
_helpers.to_query_parameters(parameters)
def test_to_query_parameters_none_argument(self):
query_parameters = _helpers.to_query_parameters(None)
self.assertEqual(query_parameters, [])
class TestToBqTableRows(unittest.TestCase):
def test_empty_iterable(self):
rows_iterable = iter([])
result = _helpers.to_bq_table_rows(rows_iterable)
self.assertEqual(list(result), [])
@unittest.skipIf(pyarrow is None, "Requires `pyarrow`")
def test_non_empty_iterable(self):
rows_iterable = [
dict(
one=_to_pyarrow(1.1),
four=_to_pyarrow(1.4),
two=_to_pyarrow(1.2),
three=_to_pyarrow(1.3),
),
dict(
one=_to_pyarrow(2.1),
four=_to_pyarrow(2.4),
two=_to_pyarrow(2.2),
three=_to_pyarrow(2.3),
),
]
result = _helpers.to_bq_table_rows(rows_iterable)
rows = list(result)
self.assertEqual(len(rows), 2)
row_1, row_2 = rows
self.assertIsInstance(row_1, table.Row)
self.assertIsInstance(row_2, table.Row)
field_value = op.itemgetter(1)
items = sorted(row_1.items(), key=field_value)
expected_items = [("one", 1.1), ("two", 1.2), ("three", 1.3), ("four", 1.4)]
self.assertEqual(items, expected_items)
items = sorted(row_2.items(), key=field_value)
expected_items = [("one", 2.1), ("two", 2.2), ("three", 2.3), ("four", 2.4)]
self.assertEqual(items, expected_items)
class TestRaiseOnClosedDecorator(unittest.TestCase):
def _make_class(self):
class Foo(object):
class_member = "class member"
def __init__(self):
self._closed = False
self.instance_member = "instance member"
def instance_method(self):
return self.instance_member
@classmethod
def class_method(cls): # pragma: NO COVER
return cls.class_member
@staticmethod
def static_method(): # pragma: NO COVER
return "static return value"
def _private_method(self):
return self.instance_member
return Foo
def test_preserves_method_names(self):
klass = self._make_class()
decorated_class = _helpers.raise_on_closed("I'm closed!")(klass)
instance = decorated_class()
self.assertEqual(instance.instance_method.__name__, "instance_method")
self.assertEqual(instance.class_method.__name__, "class_method")
self.assertEqual(instance.static_method.__name__, "static_method")
self.assertEqual(instance._private_method.__name__, "_private_method")
def test_methods_on_not_closed_instance(self):
klass = self._make_class()
decorated_class = _helpers.raise_on_closed("I'm closed!")(klass)
instance = decorated_class()
instance._closed = False
self.assertEqual(instance.instance_method(), "instance member")
self.assertEqual(instance.class_method(), "class member")
self.assertEqual(instance.static_method(), "static return value")
self.assertEqual(instance._private_method(), "instance member")
def test_public_instance_methods_on_closed_instance(self):
klass = self._make_class()
decorated_class = _helpers.raise_on_closed("I'm closed!")(klass)
instance = decorated_class()
instance._closed = True
with self.assertRaisesRegex(exceptions.ProgrammingError, "I'm closed!"):
instance.instance_method()
def test_methods_wo_public_instance_methods_on_closed_instance(self):
klass = self._make_class()
decorated_class = _helpers.raise_on_closed("I'm closed!")(klass)
instance = decorated_class()
instance._closed = True
# no errors expected
self.assertEqual(instance.class_method(), "class member")
self.assertEqual(instance.static_method(), "static return value")
self.assertEqual(instance._private_method(), "instance member")
def test_custom_class_closed_attribute(self):
klass = self._make_class()
decorated_class = _helpers.raise_on_closed(
"I'm closed!", closed_attr_name="_really_closed"
)(klass)
instance = decorated_class()
instance._closed = False
instance._really_closed = True
with self.assertRaisesRegex(exceptions.ProgrammingError, "I'm closed!"):
instance.instance_method()
def test_custom_on_closed_error_type(self):
klass = self._make_class()
decorated_class = _helpers.raise_on_closed(
"I'm closed!", exc_class=RuntimeError
)(klass)
instance = decorated_class()
instance._closed = True
with self.assertRaisesRegex(RuntimeError, "I'm closed!"):
instance.instance_method()