DateFieldTestCase::testField in core/modules/date/tests/date_field.test
@todo.
DateTimezoneTestCase::testTimezone in core/modules/date/tests/date_timezone.test
Creates one of each type of date field and check timezone handling in each.
DateUITestCase::testFieldUI in core/modules/date/tests/date.test
DateValidationTestCase::testValidation in core/modules/date/tests/date_validation.test
Test validation on each type of date widget.
DateViewsTestCase::setUp in core/modules/date/tests/date_views.test
Test setup actions.
DateViewsTestCase::testDateViewsFields in core/modules/date/tests/date_views.test