FieldFormTestCase::testFieldFormMultipleWidget in core/modules/field/tests/field.test

Tests widgets handling multiple values.

FieldFormTestCase::testNestedFieldForm in core/modules/field/tests/field.test

Tests Field API form integration within a subform.

OptionsWidgetsTestCase::testCheckBoxes in core/modules/field/modules/options/tests/options.test

Tests the 'options_buttons' widget (multiple select).

OptionsWidgetsTestCase::testOnOffCheckbox in core/modules/field/modules/options/tests/options.test

Tests the 'options_onoff' widget.

OptionsWidgetsTestCase::testRadioButtons in core/modules/field/modules/options/tests/options.test

Tests the 'options_buttons' widget (single select).

OptionsWidgetsTestCase::testSelectListMultiple in core/modules/field/modules/options/tests/options.test

Tests the 'options_select' widget (multiple select).

OptionsWidgetsTestCase::testSelectListSingle in core/modules/field/modules/options/tests/options.test

Tests the 'options_select' widget (single select).