8 calls to DrupalTestCase::assertNull()

DatabaseEmptyStatementTestCase::testEmpty in drupal-7.x/modules/simpletest/tests/database_test.test
Test that the empty result set behaves as empty.
DatabaseTaggingTestCase::testMetaData in drupal-7.x/modules/simpletest/tests/database_test.test
Test that we can attach meta data to a query object.
DatabaseUpdateTestCase::testSimpleNullUpdate in drupal-7.x/modules/simpletest/tests/database_test.test
Confirm updating to NULL.
FieldInfoTestCase::testInstanceDisabledEntityType in drupal-7.x/modules/field/tests/field.test
Test that instances on disabled entity types are filtered out.
FieldUIManageFieldsTestCase::testDeleteField in drupal-7.x/modules/field_ui/field_ui.test
Tests that deletion removes fields and instances as expected.
MailTestCase::testCancelMessage in drupal-7.x/modules/simpletest/tests/mail.test
Test that message sending may be canceled.
SessionTestCase::assertSessionCookie in drupal-7.x/modules/simpletest/tests/session.test
Assert whether the SimpleTest browser sent a session cookie.
UserPictureTestCase::testDeletePicture in drupal-7.x/modules/user/user.test
Tests deletion of user pictures.