mock_alchemy.unittests

A module for asserting SQLAlchemy expressions for unittests.

class mock_alchemy.unittests.AlchemyUnittestMixin(*args, **kwargs)

Bases: object

A unittest class for asserting SQLAlchemy expressions.

Unittest class mixin for asserting that different SQLAlchemy expressions are the same.

Uses SQLAlchemyExpressionMatcher to do the comparison.

For example:

>>> from sqlalchemy.sql.expression import column
>>> import unittest
>>> class FooTest(AlchemyUnittestMixin, unittest.TestCase):
...     def test_true(self):
...         c = column('column')
...         self.assertEqual(c == 5, c == 5)
...     def test_false(self):
...         c = column('column')
...         self.assertEqual(c == 5, c == 10)
>>> FooTest('test_true').test_true()
>>> FooTest('test_false').test_false()
Traceback (most recent call last):
...
AssertionError: BinaryExpression(sql='"column" = :column_1', params={'column_1': 5}) != BinaryExpression(sql='"column" = :column_1', params={'column_1': 10})

assert_alchemy_expression_equal(left, right, msg=None)

Assert an SQLAlchemy expression to be equal.

Assert that two given sqlalchemy expressions are equal as determined by SQLAlchemyExpressionMatcher

Parameters

• left (Any) – The left expression to comapre for equality.

• right (Any) – The right expression to comapre for equality.

• msg (Optional[str]) – The error message to dispaly.

Raises

failureException – An exception if the two SQLAlchemy statements are not equal. The msg is the displayed error meassage if provided, otherwise, the left and right expressions are displayed.

Return type

None