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index.test.tsx
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index.test.tsx
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import {
createNavigationContainerRef,
NavigationContainer,
} from '@react-navigation/native';
import { act, fireEvent, render } from '@testing-library/react-native';
import * as React from 'react';
import { Button, Text, View } from 'react-native';
import { createDrawerNavigator, type DrawerScreenProps } from '../index';
type DrawerParamList = {
A: undefined;
B: undefined;
};
it('renders a drawer navigator with screens', async () => {
const Test = ({ route, navigation }: DrawerScreenProps<DrawerParamList>) => (
<View>
<Text>Screen {route.name}</Text>
<Button onPress={() => navigation.navigate('A')} title="Go to A" />
<Button onPress={() => navigation.navigate('B')} title="Go to B" />
</View>
);
const Drawer = createDrawerNavigator<DrawerParamList>();
const { findByText, queryByText } = render(
<NavigationContainer>
<Drawer.Navigator>
<Drawer.Screen name="A" component={Test} />
<Drawer.Screen name="B" component={Test} />
</Drawer.Navigator>
</NavigationContainer>
);
expect(queryByText('Screen A')).not.toBeNull();
expect(queryByText('Screen B')).toBeNull();
fireEvent(await findByText('Go to B'), 'press');
expect(queryByText('Screen B')).not.toBeNull();
});
it('handles screens preloading', async () => {
const Drawer = createDrawerNavigator<DrawerParamList>();
const navigation = createNavigationContainerRef<DrawerParamList>();
const { queryByText } = render(
<NavigationContainer ref={navigation}>
<Drawer.Navigator>
<Drawer.Screen name="A">{() => null}</Drawer.Screen>
<Drawer.Screen name="B">{() => <Text>Screen B</Text>}</Drawer.Screen>
</Drawer.Navigator>
</NavigationContainer>
);
expect(queryByText('Screen B', { includeHiddenElements: true })).toBeNull();
act(() => navigation.preload('B'));
expect(
queryByText('Screen B', { includeHiddenElements: true })
).not.toBeNull();
});