I'm having an issue with testing component which is using react hooks. I need to test if after clicking a button the date range inside the ant design range picker is being updated. For testing I'm using Jest and react-testing-library.
At this point it looks like this: (some of these nested components are just styled-components :) )
Parent.jsx:
const Parent = () => {
const [dateRange, setDateRange] = useState([moment(), moment()]);
return (
<div>
<Sidebar
visible={sidebarVisible}
setSidebarVisible={setSidebarVisible}
setTableData={setTableData}
setStatementsLength={setStatementsLength}
setDateRange={setDateRange}
dateRange={dateRange}
/>
</div>
);
};
export default Parent;
Sidebar.jsx:
const Sidebar = props => {
return (
<div>
<Drawer
placement="left"
closable={false}
onClose={() => props.setSidebarVisible(false)}
visible={props.visible}
width={488}
bodyStyle={drawerStyle}
>
<DrawerContent data-test-id="statementsSidebar">
<DrawerHeader data-test-id="statementsSidebarHeader">
{t('settlements.statements.sidebar.createQuery')}
</DrawerHeader>
<DrawerBody>
<DateSelect
dateRange={props.dateRange}
setDateRange={props.setDateRange}
/>
</DrawerBody>
<DrawerFooter/>
</DrawerContent>
</Drawer>
</div>
);
};
export default Sidebar;
DateSelect.jsx:
const DateSelect = props => {
const RangePicker = DatePicker.RangePicker;
const [offset, setOffset] = useState(0);
const timeUnit = Object.freeze({ day: 'd', week: 'w', month: 'm' });
const [offsetUnit, setOffsetUnit] = useState(timeUnit.day);
const setRangeToLastWeek = () => {
if (offset > 0) {
props.setDateRange([
moment().subtract(1, 'w'),
moment().add(offset, 'd'),
]);
} else if (offset < 0) {
props.setDateRange([
moment()
.subtract(1, 'w')
.add(offset, 'd'),
moment(),
]);
} else {
props.setDateRange([moment().subtract(1, 'w'), moment()]);
}
setOffsetUnit('w');
};
const manuallySetDate = range => {
setOffset(0);
props.setDateRange(range);
};
return (
<div>
<HeaderRow/>
<DateSelectorRow>
<ButtonsColumn>
<Button
value="lastWeek"
onClick={setRangeToLastWeek}
style={styleButtonPadding}
data-test-id="setRangeToLastWeek"
data-testid="lastWeekButton"
>
Last 7 days
</Button>
</ButtonsColumn>
<div data-testid="range-picker-value">
<RangePicker
value={props.dateRange}
format={DateFormat}
onChange={v => manuallySetDate(v)}
/>
</div>
</DateSelectorRow>
</div>
);
};
export default DateSelect;
DateSelect.test.js:
it('After clicking last 7 days button date range is changed', () => {
// const setDateRange = ??????
const range = [moment(), moment()];
const { container } = render(<DateSelect setDateRange={setDateRange} dateRange={range}/>);
const startDate = getByPlaceholderText(container, 'Start date');
const endDate = getByPlaceholderText(container, 'End date');
const lastWeekButton = getByTestId(container,'lastWeekButton');
expect(startDate.value).toBe(moment().format(DateFormat));
expect(endDate.value).toBe(moment().format(DateFormat));
fireEvent.click(lastWeekButton);
expect(startDate).toBe(moment().subtract(1, 'w').format(DateFormat));
expect(endDate.value).toBe(moment().format(DateFormat));
});
As expected, since I'm not passing the setDateRange function as a prop to DateSelect component inside the test the range value doesn't change. I've tried to add a hook inside the test like this:
const [dateRange, setDateRange] = [moment(), moment()];
But I'm getting the:
Hooks can only be called inside the body of a function component.
So I'm guessing I cannot use it there. Is there any solution to this?
How to specify the setDateRange function inside the test that would act like a hook?
I found this: https://github.com/mpeyper/react-hooks-testing-library But it looks like this is for custom hooks?
Maybe there is a solution to this test case that is without the use of react-hooks? Any ideas highly appreciated. :)
