svelte/test/runtime/samples/select-change-handler/_config.js

export default {
	data: {
		options: [ { id: 'a' }, { id: 'b' }, { id: 'c' } ],
		selected: 'b'
	},

	test ( assert, component, target, window ) {
		const select = target.querySelector( 'select' );
		assert.equal( select.value, 'b' );

		const event = new window.Event( 'change' );

		select.value = 'c';
		select.dispatchEvent( event );

		assert.equal( select.value, 'c' );
		assert.equal( component.get().lastChangedTo, 'c' );
		assert.equal( component.get().selected, 'c' );

		component.destroy();
	}
};