Testing Harness - optional named children

[tomdye]

Bug

Package Version:

Code

Given a widget where children are defined as matching an interface or being undefined and another widget that uses that widget, i am unable to set the children of the widget using the test harness as it throws an error relating to the children being optional:

// Widgets
interface Children {
	foo?: RenderResult;
	bar?: (baz: string) => RenderResult;
}

const factory = create()
	.children<Children | undefined>();

export const Widget = factory(function({
	children
}) {
	const [{ foo, bar } = { foo: undefined, bar: undefined }] = children();
	return <virtual>
		{foo}
		{bar('test')}
	</virtual>;
});

export const ParentWidget = factory(function() {
   return <Widget key='test'>{foo: 'test'}</Widget>
})

// Test
const WrappedWidget = wrap(Widget);

const baseAssertion = assertion(() => <WrappedWidget key='test'></WrappedWidget>);

const r = renderer(() => <ParentWidget />);
r.child(WrappedWidget, { foo: [], bar: ['test'] });

I see the following error message (taken from actual usage involving the RadioGroup):

"Argument of type 'Wrapped<OptionalWNodeFactory<{ properties: Comparable<RadioGroupProperties & WidgetProperties & ThemeProperties>; children: RadioGroupChildren; }>>' is not assignable to parameter of type 'Wrapped<WNodeFactory<{ properties: any; children: any; }>>'.\n  Type 'Wrapped<OptionalWNodeFactory<{ properties: Comparable<RadioGroupProperties & WidgetProperties & ThemeProperties>; children: RadioGroupChildren; }>>' is not assignable to type 'WNodeFactory<{ properties: any; children: any; }>'.\n    Types of property 'type' are incompatible.\n      Type '\"optional\"' is not assignable to type '\"required\"'.",
	"source": "ts",
	"startLineNumber": 83,
	"startColumn": 11,
	"endLineNumber": 83,
	"endColumn": 28
}

Expected behavior:

I should be able to trigger these functions and test the output due to a type error.

Actual behavior:

I have to cast the WrappedWidget to any to get past the existing typings.