forked from openlp/openlp
85 lines
4.0 KiB
Python
85 lines
4.0 KiB
Python
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"""
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Package to test the openlp.core.lib package.
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"""
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from unittest import TestCase
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from mock import MagicMock, patch
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from sqlalchemy.pool import NullPool
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from sqlalchemy.orm import ScopedSession
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from sqlalchemy import MetaData
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from openlp.core.lib.db import init_db, get_upgrade_op
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class TestDB(TestCase):
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"""
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A test case for all the tests for the :mod:`~openlp.core.lib.db` module.
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"""
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def init_db_calls_correct_functions_test(self):
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"""
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Test that the init_db function makes the correct function calls
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"""
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# GIVEN: Mocked out SQLAlchemy calls and return objects, and an in-memory SQLite database URL
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with patch(u'openlp.core.lib.db.create_engine') as mocked_create_engine, \
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patch(u'openlp.core.lib.db.MetaData') as MockedMetaData, \
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patch(u'openlp.core.lib.db.sessionmaker') as mocked_sessionmaker, \
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patch(u'openlp.core.lib.db.scoped_session') as mocked_scoped_session:
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mocked_engine = MagicMock()
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mocked_metadata = MagicMock()
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mocked_sessionmaker_object = MagicMock()
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mocked_scoped_session_object = MagicMock()
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mocked_create_engine.return_value = mocked_engine
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MockedMetaData.return_value = mocked_metadata
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mocked_sessionmaker.return_value = mocked_sessionmaker_object
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mocked_scoped_session.return_value = mocked_scoped_session_object
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db_url = u'sqlite://'
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# WHEN: We try to initialise the db
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session, metadata = init_db(db_url)
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# THEN: We should see the correct function calls
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mocked_create_engine.assert_called_with(db_url, poolclass=NullPool)
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MockedMetaData.assert_called_with(bind=mocked_engine)
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mocked_sessionmaker.assert_called_with(autoflush=True, autocommit=False, bind=mocked_engine)
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mocked_scoped_session.assert_called_with(mocked_sessionmaker_object)
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self.assertIs(session, mocked_scoped_session_object, u'The ``session`` object should be the mock')
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self.assertIs(metadata, mocked_metadata, u'The ``metadata`` object should be the mock')
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def init_db_defaults_test(self):
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"""
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Test that initialising an in-memory SQLite database via ``init_db`` uses the defaults
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"""
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# GIVEN: An in-memory SQLite URL
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db_url = u'sqlite://'
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# WHEN: The database is initialised through init_db
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session, metadata = init_db(db_url)
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# THEN: Valid session and metadata objects should be returned
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self.assertIsInstance(session, ScopedSession, u'The ``session`` object should be a ``ScopedSession`` instance')
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self.assertIsInstance(metadata, MetaData, u'The ``metadata`` object should be a ``MetaData`` instance')
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def get_upgrade_op_test(self):
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"""
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Test that the ``get_upgrade_op`` function creates a MigrationContext and an Operations object
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"""
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# GIVEN: Mocked out alembic classes and a mocked out SQLAlchemy session object
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with patch(u'openlp.core.lib.db.MigrationContext') as MockedMigrationContext, \
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patch(u'openlp.core.lib.db.Operations') as MockedOperations:
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mocked_context = MagicMock()
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mocked_op = MagicMock()
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mocked_connection = MagicMock()
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MockedMigrationContext.configure.return_value = mocked_context
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MockedOperations.return_value = mocked_op
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mocked_session = MagicMock()
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mocked_session.bind.connect.return_value = mocked_connection
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# WHEN: get_upgrade_op is executed with the mocked session object
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op = get_upgrade_op(mocked_session)
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# THEN: The op object should be mocked_op, and the correction function calls should have been made
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self.assertIs(op, mocked_op, u'The return value should be the mocked object')
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mocked_session.bind.connect.assert_called_with()
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MockedMigrationContext.configure.assert_called_with(mocked_connection)
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MockedOperations.assert_called_with(mocked_context)
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