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fire-event.test.tsx
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768 lines (706 loc) · 25.1 KB
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import * as React from 'react';
import type { TextInputProps } from 'react-native';
import {
PanResponder,
Pressable,
ScrollView,
Text,
TextInput,
TouchableHighlight,
TouchableNativeFeedback,
TouchableOpacity,
TouchableWithoutFeedback,
View,
} from 'react-native';
import { fireEvent, render, screen } from '..';
import { nativeState } from '../native-state';
const layoutEvent = { nativeEvent: { layout: { width: 100, height: 100 } } };
const verticalScrollEvent = { nativeEvent: { contentOffset: { y: 200 } } };
const horizontalScrollEvent = { nativeEvent: { contentOffset: { x: 50 } } };
const pressEventData = { nativeEvent: { pageX: 20, pageY: 30 } };
beforeEach(() => {
jest.spyOn(Date, 'now').mockImplementation(() => 100100100100);
});
test('fireEvent accepts event name with or without "on" prefix', async () => {
const onPress = jest.fn();
await render(<Pressable testID="btn" onPress={onPress} />);
await fireEvent(screen.getByTestId('btn'), 'press');
expect(onPress).toHaveBeenCalledTimes(1);
await fireEvent(screen.getByTestId('btn'), 'onPress');
expect(onPress).toHaveBeenCalledTimes(2);
});
test('fireEvent passes event data to handler', async () => {
const onPress = jest.fn();
await render(<Pressable testID="btn" onPress={onPress} />);
await fireEvent.press(screen.getByTestId('btn'), pressEventData);
expect(onPress.mock.calls[0][0]).toMatchObject(pressEventData);
});
test('fireEvent passes multiple parameters to handler', async () => {
const handlePress = jest.fn();
await render(<Pressable testID="btn" onPress={handlePress} />);
await fireEvent(screen.getByTestId('btn'), 'press', 'param1', 'param2', 'param3');
expect(handlePress).toHaveBeenCalledWith('param1', 'param2', 'param3');
});
test('fireEvent.press returns undefined when event handler returns a value', async () => {
const handler = jest.fn().mockReturnValue('result');
await render(<Pressable testID="btn" onPress={handler} />);
const result = await fireEvent.press(screen.getByTestId('btn'));
expect(result).toBe(undefined);
});
test('fireEvent bubbles event to parent handler', async () => {
const onPress = jest.fn();
await render(
<TouchableOpacity onPress={onPress}>
<Text>Press me</Text>
</TouchableOpacity>,
);
await fireEvent.press(screen.getByText('Press me'));
expect(onPress).toHaveBeenCalled();
});
describe('fireEvent.press', () => {
test('passes default press event object to handler', async () => {
const onPress = jest.fn();
await render(<Pressable testID="btn" onPress={onPress} />);
await fireEvent.press(screen.getByTestId('btn'));
expect(onPress.mock.calls[0][0]).toMatchInlineSnapshot(`
{
"currentTarget": {
"measure": [Function],
},
"isDefaultPrevented": [Function],
"isPersistent": [Function],
"isPropagationStopped": [Function],
"nativeEvent": {
"changedTouches": [],
"identifier": 0,
"locationX": 0,
"locationY": 0,
"pageX": 0,
"pageY": 0,
"target": 0,
"timestamp": 100100100100,
"touches": [],
},
"persist": [Function],
"preventDefault": [Function],
"stopPropagation": [Function],
"target": {},
"timeStamp": 0,
}
`);
});
test('overrides default event properties with passed event props', async () => {
const onPress = jest.fn();
await render(<Pressable testID="btn" onPress={onPress} />);
const customEventData = { nativeEvent: { pageX: 20, pageY: 30 } };
await fireEvent.press(screen.getByTestId('btn'), customEventData);
expect(onPress.mock.calls[0][0]).toMatchInlineSnapshot(`
{
"currentTarget": {
"measure": [Function],
},
"isDefaultPrevented": [Function],
"isPersistent": [Function],
"isPropagationStopped": [Function],
"nativeEvent": {
"changedTouches": [],
"identifier": 0,
"locationX": 0,
"locationY": 0,
"pageX": 20,
"pageY": 30,
"target": 0,
"timestamp": 100100100100,
"touches": [],
},
"persist": [Function],
"preventDefault": [Function],
"stopPropagation": [Function],
"target": {},
"timeStamp": 0,
}
`);
});
test.each([
['Pressable', Pressable],
['TouchableOpacity', TouchableOpacity],
['TouchableHighlight', TouchableHighlight],
['TouchableWithoutFeedback', TouchableWithoutFeedback],
['TouchableNativeFeedback', TouchableNativeFeedback],
])('works on %s', async (_, Component) => {
const onPress = jest.fn();
await render(
// eslint-disable-next-line @typescript-eslint/ban-ts-comment
// @ts-ignore - Component is a valid React component - but some RN versions have incorrect type definitions
<Component testID="subject" onPress={onPress}>
<Text>Press me</Text>
</Component>,
);
await fireEvent.press(screen.getByTestId('subject'));
expect(onPress).toHaveBeenCalled();
});
});
describe('fireEvent.changeText', () => {
test('works on TextInput', async () => {
const onChangeText = jest.fn();
await render(<TextInput testID="input" onChangeText={onChangeText} />);
const input = screen.getByTestId('input');
await fireEvent.changeText(input, 'new text');
expect(onChangeText).toHaveBeenCalledWith('new text');
expect(nativeState.valueForElement.get(input)).toBe('new text');
});
test('does not fire on non-editable TextInput', async () => {
const onChangeText = jest.fn();
await render(<TextInput testID="input" editable={false} onChangeText={onChangeText} />);
const input = screen.getByTestId('input');
await fireEvent.changeText(input, 'new text');
expect(onChangeText).not.toHaveBeenCalled();
expect(nativeState.valueForElement.get(input)).toBeUndefined();
});
});
describe('fireEvent.scroll', () => {
test('passes default scroll event object to handler', async () => {
const onScroll = jest.fn();
await render(
<ScrollView testID="scroll" onScroll={onScroll}>
<Text>Content</Text>
</ScrollView>,
);
const scrollView = screen.getByTestId('scroll');
await fireEvent.scroll(scrollView);
expect(onScroll.mock.calls[0][0]).toMatchInlineSnapshot(`
{
"currentTarget": {},
"isDefaultPrevented": [Function],
"isPersistent": [Function],
"isPropagationStopped": [Function],
"nativeEvent": {
"contentInset": {
"bottom": 0,
"left": 0,
"right": 0,
"top": 0,
},
"contentOffset": {
"x": 0,
"y": 0,
},
"contentSize": {
"height": 0,
"width": 0,
},
"layoutMeasurement": {
"height": 0,
"width": 0,
},
"responderIgnoreScroll": true,
"target": 0,
"velocity": {
"x": 0,
"y": 0,
},
},
"persist": [Function],
"preventDefault": [Function],
"stopPropagation": [Function],
"target": {},
"timeStamp": 0,
}
`);
});
test('overrides default event properties with passed event props', async () => {
const onScroll = jest.fn();
await render(
<ScrollView testID="scroll" onScroll={onScroll}>
<Text>Content</Text>
</ScrollView>,
);
const scrollView = screen.getByTestId('scroll');
const customEventData = { nativeEvent: { contentOffset: { x: 50, y: 200 } } };
await fireEvent.scroll(scrollView, customEventData);
expect(onScroll.mock.calls[0][0]).toMatchInlineSnapshot(`
{
"currentTarget": {},
"isDefaultPrevented": [Function],
"isPersistent": [Function],
"isPropagationStopped": [Function],
"nativeEvent": {
"contentInset": {
"bottom": 0,
"left": 0,
"right": 0,
"top": 0,
},
"contentOffset": {
"x": 50,
"y": 200,
},
"contentSize": {
"height": 0,
"width": 0,
},
"layoutMeasurement": {
"height": 0,
"width": 0,
},
"responderIgnoreScroll": true,
"target": 0,
"velocity": {
"x": 0,
"y": 0,
},
},
"persist": [Function],
"preventDefault": [Function],
"stopPropagation": [Function],
"target": {},
"timeStamp": 0,
}
`);
});
test('works on ScrollView', async () => {
const onScroll = jest.fn();
await render(
<ScrollView testID="scroll" onScroll={onScroll}>
<Text>Content</Text>
</ScrollView>,
);
const scrollView = screen.getByTestId('scroll');
await fireEvent.scroll(scrollView, verticalScrollEvent);
expect(onScroll.mock.calls[0][0]).toMatchObject(verticalScrollEvent);
expect(nativeState.contentOffsetForElement.get(scrollView)).toEqual({ x: 0, y: 200 });
});
test.each([
['onScroll', 'scroll'],
['onScrollBeginDrag', 'scrollBeginDrag'],
['onScrollEndDrag', 'scrollEndDrag'],
['onMomentumScrollBegin', 'momentumScrollBegin'],
['onMomentumScrollEnd', 'momentumScrollEnd'],
])('fires %s on ScrollView', async (propName, eventName) => {
const handler = jest.fn();
await render(<ScrollView testID="scroll" {...{ [propName]: handler }} />);
const scrollView = screen.getByTestId('scroll');
await fireEvent(scrollView, eventName, verticalScrollEvent);
expect(handler).toHaveBeenCalledWith(verticalScrollEvent);
expect(nativeState.contentOffsetForElement.get(scrollView)).toEqual({ x: 0, y: 200 });
});
test('without contentOffset scrolls to (0, 0)', async () => {
const onScroll = jest.fn();
await render(
<ScrollView testID="scroll" onScroll={onScroll}>
<Text>Content</Text>
</ScrollView>,
);
const scrollView = screen.getByTestId('scroll');
await fireEvent.scroll(scrollView, {});
expect(onScroll.mock.calls[0][0]).toMatchObject({
nativeEvent: { contentOffset: { x: 0, y: 0 } },
});
expect(nativeState.contentOffsetForElement.get(scrollView)).toEqual({ x: 0, y: 0 });
});
test('with non-finite contentOffset values uses 0', async () => {
const onScroll = jest.fn();
await render(
<ScrollView testID="scroll" onScroll={onScroll}>
<Text>Content</Text>
</ScrollView>,
);
const scrollView = screen.getByTestId('scroll');
await fireEvent.scroll(scrollView, {
nativeEvent: { contentOffset: { y: Infinity } },
});
expect(onScroll).toHaveBeenCalled();
expect(nativeState.contentOffsetForElement.get(scrollView)).toEqual({ x: 0, y: 0 });
});
test('with horizontal scroll updates native state', async () => {
const onScroll = jest.fn();
await render(
<ScrollView testID="scroll" onScroll={onScroll}>
<Text>Content</Text>
</ScrollView>,
);
const scrollView = screen.getByTestId('scroll');
await fireEvent.scroll(scrollView, horizontalScrollEvent);
expect(onScroll.mock.calls[0][0]).toMatchObject(horizontalScrollEvent);
expect(nativeState.contentOffsetForElement.get(scrollView)).toEqual({ x: 50, y: 0 });
});
test('without contentOffset via fireEvent() does not update native state', async () => {
const onScroll = jest.fn();
await render(
<ScrollView testID="scroll" onScroll={onScroll}>
<Text>Content</Text>
</ScrollView>,
);
const scrollView = screen.getByTestId('scroll');
await fireEvent(scrollView, 'scroll', { nativeEvent: {} });
expect(onScroll).toHaveBeenCalled();
expect(nativeState.contentOffsetForElement.get(scrollView)).toBeUndefined();
});
test('with non-finite x contentOffset value uses 0', async () => {
const onScroll = jest.fn();
await render(
<ScrollView testID="scroll" onScroll={onScroll}>
<Text>Content</Text>
</ScrollView>,
);
const scrollView = screen.getByTestId('scroll');
await fireEvent.scroll(scrollView, {
nativeEvent: { contentOffset: { x: Infinity } },
});
expect(onScroll).toHaveBeenCalled();
expect(nativeState.contentOffsetForElement.get(scrollView)).toEqual({ x: 0, y: 0 });
});
});
test('fireEvent fires custom event (onCustomEvent) on composite component', async () => {
const CustomComponent = ({ onCustomEvent }: { onCustomEvent: (data: string) => void }) => (
<TouchableOpacity onPress={() => onCustomEvent('event data')}>
<Text>Custom</Text>
</TouchableOpacity>
);
const handler = jest.fn();
await render(<CustomComponent onCustomEvent={handler} />);
await fireEvent(screen.getByText('Custom'), 'customEvent', 'event data');
expect(handler).toHaveBeenCalledWith('event data');
});
test('fireEvent fires event with custom prop name (handlePress) on composite component', async () => {
const MyButton = ({ handlePress }: { handlePress: () => void }) => (
<TouchableOpacity onPress={handlePress}>
<Text>Button</Text>
</TouchableOpacity>
);
const handler = jest.fn();
await render(<MyButton handlePress={handler} />);
await fireEvent(screen.getByText('Button'), 'handlePress');
expect(handler).toHaveBeenCalled();
});
test('fireEvent returns undefined when handler does not return a value', async () => {
const handler = jest.fn();
await render(<Pressable testID="btn" onPress={handler} />);
const result = await fireEvent.press(screen.getByTestId('btn'));
expect(result).toBeUndefined();
});
test('fireEvent calls handler on element when both element and parent have handlers', async () => {
const childHandler = jest.fn();
const parentHandler = jest.fn();
await render(
<TouchableOpacity onPress={parentHandler}>
<Pressable testID="child" onPress={childHandler}>
<Text>Press me</Text>
</Pressable>
</TouchableOpacity>,
);
await fireEvent.press(screen.getByTestId('child'));
expect(childHandler).toHaveBeenCalledTimes(1);
expect(parentHandler).not.toHaveBeenCalled();
});
test('fireEvent does nothing when element is unmounted', async () => {
const onPress = jest.fn();
await render(
<View>
<Pressable testID="btn" onPress={onPress} />
</View>,
);
const element = screen.getByTestId('btn');
await screen.rerender(<View />);
await fireEvent.press(element);
expect(onPress).not.toHaveBeenCalled();
});
test('fireEvent does not throw when called with non-existent event name', async () => {
await render(<Pressable testID="btn" />);
const element = screen.getByTestId('btn');
await expect(fireEvent(element, 'nonExistentEvent' as any)).resolves.toBeUndefined();
});
test('fireEvent handles handler that throws gracefully', async () => {
const error = new Error('Handler error');
const onPress = jest.fn(() => {
throw error;
});
await render(<Pressable testID="btn" onPress={onPress} />);
await expect(fireEvent.press(screen.getByTestId('btn'))).rejects.toThrow('Handler error');
expect(onPress).toHaveBeenCalledTimes(1);
});
describe('disabled elements', () => {
test('does not fire on disabled Pressable', async () => {
const onPress = jest.fn();
await render(
<Pressable onPress={onPress} disabled={true}>
<Text>Trigger</Text>
</Pressable>,
);
await fireEvent.press(screen.getByText('Trigger'));
expect(onPress).not.toHaveBeenCalled();
});
test('does not fire on disabled TouchableOpacity', async () => {
const onPress = jest.fn();
await render(
<TouchableOpacity onPress={onPress} disabled={true}>
<Text>Trigger</Text>
</TouchableOpacity>,
);
await fireEvent.press(screen.getByText('Trigger'));
expect(onPress).not.toHaveBeenCalled();
});
test('bubbles event past disabled inner to enabled outer Pressable', async () => {
const handleInnerPress = jest.fn();
const handleOuterPress = jest.fn();
await render(
<Pressable onPress={handleOuterPress}>
<Pressable onPress={handleInnerPress} disabled={true}>
<Text>Inner Trigger</Text>
</Pressable>
</Pressable>,
);
await fireEvent.press(screen.getByText('Inner Trigger'));
expect(handleInnerPress).not.toHaveBeenCalled();
expect(handleOuterPress).toHaveBeenCalledTimes(1);
});
test('bubbles event past disabled inner to enabled outer TouchableOpacity', async () => {
const handleInnerPress = jest.fn();
const handleOuterPress = jest.fn();
await render(
<TouchableOpacity onPress={handleOuterPress}>
<TouchableOpacity onPress={handleInnerPress} disabled={true}>
<Text>Inner Trigger</Text>
</TouchableOpacity>
</TouchableOpacity>,
);
await fireEvent.press(screen.getByText('Inner Trigger'));
expect(handleInnerPress).not.toHaveBeenCalled();
expect(handleOuterPress).toHaveBeenCalledTimes(1);
});
test('ignores custom disabled prop on composite component (only respects native disabled)', async () => {
const TestComponent = ({ onPress }: { onPress: () => void; disabled?: boolean }) => (
<TouchableOpacity onPress={onPress}>
<Text>Trigger Test</Text>
</TouchableOpacity>
);
const handlePress = jest.fn();
await render(<TestComponent onPress={handlePress} disabled={true} />);
await fireEvent.press(screen.getByText('Trigger Test'));
expect(handlePress).toHaveBeenCalledTimes(1);
});
});
describe('pointerEvents prop', () => {
test('does not fire inside View with pointerEvents="none"', async () => {
const onPress = jest.fn();
await render(
<View pointerEvents="none">
<Pressable testID="btn" onPress={onPress} />
</View>,
);
await fireEvent.press(screen.getByTestId('btn'));
expect(onPress).not.toHaveBeenCalled();
});
test('does not fire inside View with pointerEvents="box-only"', async () => {
const onPress = jest.fn();
await render(
<View pointerEvents="box-only">
<Pressable onPress={onPress}>
<Text>Trigger</Text>
</Pressable>
</View>,
);
await fireEvent.press(screen.getByText('Trigger'));
expect(onPress).not.toHaveBeenCalled();
});
test('fires inside View with pointerEvents="box-none"', async () => {
const onPress = jest.fn();
await render(
<View pointerEvents="box-none">
<Pressable onPress={onPress}>
<Text>Trigger</Text>
</Pressable>
</View>,
);
await fireEvent.press(screen.getByText('Trigger'));
expect(onPress).toHaveBeenCalledTimes(1);
});
test('fires inside View with pointerEvents="auto"', async () => {
const onPress = jest.fn();
await render(
<View pointerEvents="auto">
<Pressable onPress={onPress}>
<Text>Trigger</Text>
</Pressable>
</View>,
);
await fireEvent.press(screen.getByText('Trigger'));
expect(onPress).toHaveBeenCalledTimes(1);
});
test('does not fire deeply inside View with pointerEvents="box-only"', async () => {
const onPress = jest.fn();
await render(
<View pointerEvents="box-only">
<View>
<Pressable onPress={onPress}>
<Text>Trigger</Text>
</Pressable>
</View>
</View>,
);
await fireEvent.press(screen.getByText('Trigger'));
expect(onPress).not.toHaveBeenCalled();
});
test('fires non-pointer events inside View with pointerEvents="box-none"', async () => {
const onLayout = jest.fn();
await render(<View testID="view" pointerEvents="box-none" onLayout={onLayout} />);
await fireEvent(screen.getByTestId('view'), 'layout');
expect(onLayout).toHaveBeenCalled();
});
test('fires on Pressable with pointerEvents="box-only" on itself', async () => {
const onPress = jest.fn();
await render(<Pressable testID="pressable" pointerEvents="box-only" onPress={onPress} />);
await fireEvent.press(screen.getByTestId('pressable'));
expect(onPress).toHaveBeenCalled();
});
});
describe('non-editable TextInput', () => {
function WrappedTextInput(props: TextInputProps) {
return <TextInput {...props} />;
}
function DoubleWrappedTextInput(props: TextInputProps) {
return <WrappedTextInput {...props} />;
}
test('blocks touch-related events but allows non-touch events', async () => {
const onFocus = jest.fn();
const onChangeText = jest.fn();
const onSubmitEditing = jest.fn();
const onLayout = jest.fn();
await render(
<TextInput
editable={false}
testID="input"
onFocus={onFocus}
onChangeText={onChangeText}
onSubmitEditing={onSubmitEditing}
onLayout={onLayout}
/>,
);
const input = screen.getByTestId('input');
await fireEvent(input, 'focus');
await fireEvent.changeText(input, 'Text');
await fireEvent(input, 'submitEditing', { nativeEvent: { text: 'Text' } });
await fireEvent(input, 'layout', layoutEvent);
expect(onFocus).not.toHaveBeenCalled();
expect(onChangeText).not.toHaveBeenCalled();
expect(onSubmitEditing).not.toHaveBeenCalled();
expect(onLayout).toHaveBeenCalledWith(layoutEvent);
});
test('blocks touch-related events when firing on nested Text child', async () => {
const onFocus = jest.fn();
const onChangeText = jest.fn();
const onSubmitEditing = jest.fn();
const onLayout = jest.fn();
await render(
<TextInput
editable={false}
testID="input"
onFocus={onFocus}
onChangeText={onChangeText}
onSubmitEditing={onSubmitEditing}
onLayout={onLayout}
>
<Text>Nested Text</Text>
</TextInput>,
);
const subject = screen.getByText('Nested Text');
await fireEvent(subject, 'focus');
await fireEvent(subject, 'onFocus');
await fireEvent.changeText(subject, 'Text');
await fireEvent(subject, 'submitEditing', { nativeEvent: { text: 'Text' } });
await fireEvent(subject, 'onSubmitEditing', { nativeEvent: { text: 'Text' } });
await fireEvent(subject, 'layout', layoutEvent);
await fireEvent(subject, 'onLayout', layoutEvent);
expect(onFocus).not.toHaveBeenCalled();
expect(onChangeText).not.toHaveBeenCalled();
expect(onSubmitEditing).not.toHaveBeenCalled();
expect(onLayout).toHaveBeenCalledTimes(2);
expect(onLayout).toHaveBeenCalledWith(layoutEvent);
});
test.each([
['WrappedTextInput', WrappedTextInput],
['DoubleWrappedTextInput', DoubleWrappedTextInput],
])('blocks touch-related events on %s', async (_, Component) => {
const onFocus = jest.fn();
const onChangeText = jest.fn();
const onSubmitEditing = jest.fn();
const onLayout = jest.fn();
await render(
<Component
editable={false}
testID="input"
onFocus={onFocus}
onChangeText={onChangeText}
onSubmitEditing={onSubmitEditing}
onLayout={onLayout}
/>,
);
const input = screen.getByTestId('input');
await fireEvent(input, 'focus');
await fireEvent.changeText(input, 'Text');
await fireEvent(input, 'submitEditing', { nativeEvent: { text: 'Text' } });
await fireEvent(input, 'layout', layoutEvent);
expect(onFocus).not.toHaveBeenCalled();
expect(onChangeText).not.toHaveBeenCalled();
expect(onSubmitEditing).not.toHaveBeenCalled();
expect(onLayout).toHaveBeenCalledWith(layoutEvent);
});
test('fires layout event', async () => {
const onLayout = jest.fn();
await render(<TextInput testID="input" editable={false} onLayout={onLayout} />);
await fireEvent(screen.getByTestId('input'), 'layout');
expect(onLayout).toHaveBeenCalled();
});
test('fires scroll event', async () => {
const onScroll = jest.fn();
await render(<TextInput testID="input" editable={false} onScroll={onScroll} />);
await fireEvent(screen.getByTestId('input'), 'scroll');
expect(onScroll).toHaveBeenCalled();
});
});
describe('responder system', () => {
test('respects disabled prop through composite wrappers', async () => {
function TestChildTouchableComponent({
onPress,
someProp,
}: {
onPress: () => void;
someProp: boolean;
}) {
return (
<View>
<TouchableOpacity onPress={onPress} disabled={someProp}>
<Text>Trigger</Text>
</TouchableOpacity>
</View>
);
}
const handlePress = jest.fn();
await render(
<View>
<TestChildTouchableComponent onPress={handlePress} someProp={true} />
</View>,
);
await fireEvent.press(screen.getByText('Trigger'));
expect(handlePress).not.toHaveBeenCalled();
});
test('fires responderMove on PanResponder component', async () => {
const onDrag = jest.fn();
function TestDraggableComponent({ onDrag }: { onDrag: () => void }) {
const responderHandlers = PanResponder.create({
onMoveShouldSetPanResponder: () => true,
onPanResponderMove: onDrag,
}).panHandlers;
return (
<View {...responderHandlers}>
<Text>Trigger</Text>
</View>
);
}
await render(<TestDraggableComponent onDrag={onDrag} />);
await fireEvent(screen.getByText('Trigger'), 'responderMove', {
touchHistory: { mostRecentTimeStamp: '2', touchBank: [] },
});
expect(onDrag).toHaveBeenCalled();
});
});