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dnd.test.js
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/*
* Copyright 2020 Adobe. All rights reserved.
* This file is licensed to you under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License. You may obtain a copy
* of the License at http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under
* the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
* OF ANY KIND, either express or implied. See the License for the specific language
* governing permissions and limitations under the License.
*/
jest.mock('@react-aria/live-announcer');
import {act, fireEvent, render, waitFor} from '@testing-library/react';
import {announce} from '@react-aria/live-announcer';
import {CUSTOM_DRAG_TYPE} from '../src/constants';
import {DataTransfer, DataTransferItem, DragEvent, FileSystemDirectoryEntry, FileSystemFileEntry} from './mocks';
import {Draggable, Droppable} from './examples';
import {DragTypes} from '../src/utils';
import React from 'react';
import userEvent from '@testing-library/user-event';
describe('useDrag and useDrop', function () {
beforeEach(() => {
jest.spyOn(HTMLElement.prototype, 'getBoundingClientRect').mockImplementation(() => ({
left: 0,
top: 0,
x: 0,
y: 0,
width: 100,
height: 50
}));
jest.useFakeTimers('modern');
});
afterEach(() => {
act(() => jest.runAllTimers());
});
describe('native drag and drop', () => {
it('should perform basic drag and drop', async () => {
let onDragStart = jest.fn();
let onDragMove = jest.fn();
let onDragEnd = jest.fn();
let onDropEnter = jest.fn();
let onDropMove = jest.fn();
let onDrop = jest.fn();
let tree = render(<>
<Draggable onDragStart={onDragStart} onDragMove={onDragMove} onDragEnd={onDragEnd} />
<Droppable onDropEnter={onDropEnter} onDropMove={onDropMove} onDrop={onDrop} />
</>);
let draggable = tree.getByText('Drag me');
let droppable = tree.getByText('Drop here');
expect(draggable).toHaveAttribute('data-dragging', 'false');
expect(droppable).toHaveAttribute('data-droptarget', 'false');
let dataTransfer = new DataTransfer();
fireEvent(draggable, new DragEvent('dragstart', {dataTransfer, clientX: 0, clientY: 0}));
expect(dataTransfer.dropEffect).toBe('none');
expect(dataTransfer.effectAllowed).toBe('all');
expect([...dataTransfer.items]).toEqual([new DataTransferItem('text/plain', 'hello world')]);
expect(dataTransfer._dragImage).toBeUndefined();
act(() => jest.runAllTimers());
expect(draggable).toHaveAttribute('data-dragging', 'true');
expect(onDragStart).toHaveBeenCalledTimes(1);
expect(onDragStart).toHaveBeenCalledWith({
type: 'dragstart',
x: 0,
y: 0
});
fireEvent(draggable, new DragEvent('drag', {dataTransfer, clientX: 1, clientY: 1}));
expect(onDragMove).toHaveBeenCalledTimes(1);
expect(onDragMove).toHaveBeenCalledWith({
type: 'dragmove',
x: 1,
y: 1
});
fireEvent(droppable, new DragEvent('dragenter', {dataTransfer, clientX: 1, clientY: 1}));
expect(onDropEnter).toHaveBeenCalledTimes(1);
expect(onDropEnter).toHaveBeenCalledWith({
type: 'dropenter',
x: 1,
y: 1
});
expect(dataTransfer.dropEffect).toBe('move');
expect(droppable).toHaveAttribute('data-droptarget', 'true');
fireEvent(droppable, new DragEvent('dragover', {dataTransfer, clientX: 2, clientY: 2}));
expect(onDropMove).toHaveBeenCalledTimes(1);
expect(onDropMove).toHaveBeenCalledWith({
type: 'dropmove',
x: 2,
y: 2
});
expect(dataTransfer.dropEffect).toBe('move');
expect(droppable).toHaveAttribute('data-droptarget', 'true');
fireEvent(droppable, new DragEvent('drop', {dataTransfer, clientX: 2, clientY: 2}));
act(() => jest.runAllTimers());
expect(onDrop).toHaveBeenCalledTimes(1);
expect(onDrop).toHaveBeenCalledWith({
type: 'drop',
x: 2,
y: 2,
dropOperation: 'move',
items: [
{
kind: 'text',
types: new Set(['text/plain']),
getText: expect.any(Function)
}
]
});
expect(await onDrop.mock.calls[0][0].items[0].getText('text/plain')).toBe('hello world');
fireEvent(draggable, new DragEvent('dragend', {dataTransfer, clientX: 2, clientY: 2}));
expect(onDragEnd).toHaveBeenCalledTimes(1);
expect(onDragEnd).toHaveBeenCalledWith({
type: 'dragend',
x: 2,
y: 2,
dropOperation: 'move'
});
});
describe('events', () => {
it('fires onDragMove only when the drag actually moves', () => {
let onDragStart = jest.fn();
let onDragMove = jest.fn();
let tree = render(<Draggable onDragStart={onDragStart} onDragMove={onDragMove} />);
let draggable = tree.getByText('Drag me');
let dataTransfer = new DataTransfer();
fireEvent(draggable, new DragEvent('dragstart', {dataTransfer, clientX: 0, clientY: 0}));
expect(onDragStart).toHaveBeenCalledTimes(1);
expect(onDragMove).not.toHaveBeenCalled();
fireEvent(draggable, new DragEvent('drag', {dataTransfer, clientX: 0, clientY: 0}));
expect(onDragMove).not.toHaveBeenCalled();
fireEvent(draggable, new DragEvent('drag', {dataTransfer, clientX: 1, clientY: 1}));
expect(onDragMove).toHaveBeenCalledTimes(1);
expect(onDragMove).toHaveBeenCalledWith({
type: 'dragmove',
x: 1,
y: 1
});
fireEvent(draggable, new DragEvent('drag', {dataTransfer, clientX: 1, clientY: 1}));
expect(onDragMove).toHaveBeenCalledTimes(1);
});
it('fires onDropMove only when the drag actually moves', () => {
let onDropEnter = jest.fn();
let onDropMove = jest.fn();
let tree = render(<Droppable onDropEnter={onDropEnter} onDropMove={onDropMove} />);
let droppable = tree.getByText('Drop here');
let dataTransfer = new DataTransfer();
fireEvent(droppable, new DragEvent('dragenter', {dataTransfer, clientX: 1, clientY: 1}));
expect(onDropEnter).toHaveBeenCalledTimes(1);
expect(onDropMove).not.toHaveBeenCalled();
fireEvent(droppable, new DragEvent('dragover', {dataTransfer, clientX: 1, clientY: 1}));
expect(onDropMove).not.toHaveBeenCalled();
fireEvent(droppable, new DragEvent('dragover', {dataTransfer, clientX: 2, clientY: 2}));
expect(onDropMove).toHaveBeenCalledTimes(1);
expect(onDropMove).toHaveBeenCalledWith({
type: 'dropmove',
x: 2,
y: 2
});
fireEvent(droppable, new DragEvent('dragover', {dataTransfer, clientX: 2, clientY: 2}));
expect(onDropMove).toHaveBeenCalledTimes(1);
});
it('fires onDropExit when moving off a drop target', () => {
let onDropEnter = jest.fn();
let onDropExit = jest.fn();
let tree = render(<Droppable onDropEnter={onDropEnter} onDropExit={onDropExit} />);
let droppable = tree.getByText('Drop here');
let dataTransfer = new DataTransfer();
fireEvent(droppable, new DragEvent('dragenter', {dataTransfer, clientX: 1, clientY: 1}));
expect(onDropEnter).toHaveBeenCalledTimes(1);
expect(onDropExit).not.toHaveBeenCalled();
fireEvent(droppable, new DragEvent('dragover', {dataTransfer, clientX: 2, clientY: 2}));
expect(onDropExit).not.toHaveBeenCalled();
fireEvent(droppable, new DragEvent('dragleave', {dataTransfer, clientX: 2, clientY: 2}));
expect(onDropExit).toHaveBeenCalledTimes(1);
expect(onDropExit).toHaveBeenCalledWith({
type: 'dropexit',
x: 2,
y: 2
});
});
it('fires onDropExit on drop', () => {
let onDropEnter = jest.fn();
let onDropExit = jest.fn();
let tree = render(<Droppable onDropEnter={onDropEnter} onDropExit={onDropExit} />);
let droppable = tree.getByText('Drop here');
let dataTransfer = new DataTransfer();
fireEvent(droppable, new DragEvent('dragenter', {dataTransfer, clientX: 1, clientY: 1}));
expect(onDropEnter).toHaveBeenCalledTimes(1);
expect(onDropExit).not.toHaveBeenCalled();
fireEvent(droppable, new DragEvent('dragover', {dataTransfer, clientX: 2, clientY: 2}));
expect(onDropExit).not.toHaveBeenCalled();
fireEvent(droppable, new DragEvent('drop', {dataTransfer, clientX: 2, clientY: 2}));
expect(onDropExit).toHaveBeenCalledTimes(1);
expect(onDropExit).toHaveBeenCalledWith({
type: 'dropexit',
x: 2,
y: 2
});
});
it('fires onDropActivate when a drag is held over the target', () => {
let onDropEnter = jest.fn();
let onDropActivate = jest.fn();
let tree = render(<Droppable onDropEnter={onDropEnter} onDropActivate={onDropActivate} />);
let droppable = tree.getByText('Drop here');
let dataTransfer = new DataTransfer();
fireEvent(droppable, new DragEvent('dragenter', {dataTransfer, clientX: 1, clientY: 1}));
expect(onDropEnter).toHaveBeenCalledTimes(1);
expect(onDropActivate).not.toHaveBeenCalled();
fireEvent(droppable, new DragEvent('dragover', {dataTransfer, clientX: 2, clientY: 2}));
expect(onDropActivate).not.toHaveBeenCalled();
act(() => jest.advanceTimersByTime(500));
expect(onDropActivate).not.toHaveBeenCalled();
act(() => jest.advanceTimersByTime(500));
expect(onDropActivate).toHaveBeenCalledTimes(1);
expect(onDropActivate).toHaveBeenCalledWith({
type: 'dropactivate',
x: 2,
y: 2
});
});
it('does not fire onDropActivate if the drag leaves the target before the timer fires', () => {
let onDropEnter = jest.fn();
let onDropActivate = jest.fn();
let onDropExit = jest.fn();
let tree = render(<Droppable onDropEnter={onDropEnter} onDropActivate={onDropActivate} onDropExit={onDropExit} />);
let droppable = tree.getByText('Drop here');
let dataTransfer = new DataTransfer();
fireEvent(droppable, new DragEvent('dragenter', {dataTransfer, clientX: 1, clientY: 1}));
expect(onDropEnter).toHaveBeenCalledTimes(1);
expect(onDropActivate).not.toHaveBeenCalled();
fireEvent(droppable, new DragEvent('dragover', {dataTransfer, clientX: 2, clientY: 2}));
expect(onDropActivate).not.toHaveBeenCalled();
act(() => jest.advanceTimersByTime(500));
expect(onDropActivate).not.toHaveBeenCalled();
fireEvent(droppable, new DragEvent('dragleave', {dataTransfer, clientX: 2, clientY: 2}));
expect(onDropExit).toHaveBeenCalledTimes(1);
expect(onDropActivate).not.toHaveBeenCalled();
act(() => jest.advanceTimersByTime(500));
expect(onDropActivate).not.toHaveBeenCalled();
});
it('does not fire onDropEnter and onDropExit for nested elements', () => {
let onDropEnter = jest.fn();
let onDropExit = jest.fn();
let tree = render(
<Droppable onDropEnter={onDropEnter} onDropExit={onDropExit}>
<div>Test</div>
</Droppable>
);
let droppable = tree.getByRole('button');
let child = droppable.firstChild;
let dataTransfer = new DataTransfer();
fireEvent(droppable, new DragEvent('dragenter', {dataTransfer, clientX: 1, clientY: 1}));
expect(onDropEnter).toHaveBeenCalledTimes(1);
expect(onDropExit).not.toHaveBeenCalled();
fireEvent(child, new DragEvent('dragenter', {dataTransfer, clientX: 1, clientY: 1}));
expect(onDropEnter).toHaveBeenCalledTimes(1);
expect(onDropExit).not.toHaveBeenCalled();
fireEvent(child, new DragEvent('dragleave', {dataTransfer, clientX: 1, clientY: 1}));
expect(onDropEnter).toHaveBeenCalledTimes(1);
expect(onDropExit).not.toHaveBeenCalled();
fireEvent(droppable, new DragEvent('dragleave', {dataTransfer, clientX: 1, clientY: 1}));
expect(onDropEnter).toHaveBeenCalledTimes(1);
expect(onDropExit).toHaveBeenCalledTimes(1);
});
describe('nested drop targets', () => {
let onDropParent = jest.fn();
let onDropEnterParent = jest.fn();
let onDropExitParent = jest.fn();
let onDropActivateParent = jest.fn();
let onDropMoveParent = jest.fn();
let onDropChild = jest.fn();
let onDropEnterChild = jest.fn();
let onDropExitChild = jest.fn();
let onDropActivateChild = jest.fn();
let onDropMoveChild = jest.fn();
function renderNestedDrop() {
return render(
<Droppable onDrop={onDropParent} onDropExit={onDropExitParent} onDropEnter={onDropEnterParent} onDropActivate={onDropActivateParent} onDropMove={onDropMoveParent}>
<Droppable onDrop={onDropChild} onDropExit={onDropExitChild} onDropEnter={onDropEnterChild} onDropActivate={onDropActivateChild} onDropMove={onDropMoveChild} />
</Droppable>
);
}
afterEach(() => {
jest.clearAllMocks();
act(() => jest.runAllTimers());
});
it('does not trigger parent onDrop and onDropExit when dropping on child', () => {
let tree = renderNestedDrop();
let droppableParent = tree.getAllByRole('button')[0];
let droppableChild = droppableParent.firstChild;
let dataTransfer = new DataTransfer();
fireEvent(droppableChild, new DragEvent('drop', {dataTransfer, clientX: 1, clientY: 1}));
act(() => jest.runAllTimers());
expect(onDropChild).toHaveBeenCalledTimes(1);
expect(onDropExitChild).toHaveBeenCalledTimes(1);
expect(onDropParent).not.toHaveBeenCalled();
expect(onDropExitParent).not.toHaveBeenCalled();
});
it('does not trigger parent onDropEnter when entering drop child', () => {
let tree = renderNestedDrop();
let droppableParent = tree.getAllByRole('button')[0];
let droppableChild = droppableParent.firstChild;
let dataTransfer = new DataTransfer();
fireEvent(droppableChild, new DragEvent('dragenter', {dataTransfer, clientX: 1, clientY: 1}));
expect(onDropEnterChild).toHaveBeenCalledTimes(1);
expect(onDropEnterParent).not.toHaveBeenCalled();
});
it('does not trigger parent onDropExit when exiting child', () => {
let tree = renderNestedDrop();
let droppableParent = tree.getAllByRole('button')[0];
let droppableChild = droppableParent.firstChild;
let dataTransfer = new DataTransfer();
fireEvent(droppableChild, new DragEvent('dragenter', {dataTransfer, clientX: 1, clientY: 1}));
fireEvent(droppableChild, new DragEvent('dragleave', {dataTransfer, clientX: 1, clientY: 1}));
expect(onDropExitChild).toHaveBeenCalledTimes(1);
expect(onDropExitParent).not.toHaveBeenCalled();
});
it('does not trigger parent onDropActivate when hovering on drop child', () => {
let tree = renderNestedDrop();
let droppableParent = tree.getAllByRole('button')[0];
let droppableChild = droppableParent.firstChild;
let dataTransfer = new DataTransfer();
fireEvent(droppableChild, new DragEvent('dragenter', {dataTransfer, clientX: 1, clientY: 1}));
fireEvent(droppableChild, new DragEvent('dragover', {dataTransfer, clientX: 2, clientY: 2}));
expect(onDropActivateChild).not.toHaveBeenCalled();
expect(onDropActivateParent).not.toHaveBeenCalled();
act(() => jest.advanceTimersByTime(500));
expect(onDropActivateChild).not.toHaveBeenCalled();
expect(onDropActivateParent).not.toHaveBeenCalled();
act(() => jest.advanceTimersByTime(500));
expect(onDropActivateChild).toHaveBeenCalledTimes(1);
expect(onDropActivateChild).toHaveBeenCalledWith({
type: 'dropactivate',
x: 2,
y: 2
});
expect(onDropActivateParent).not.toHaveBeenCalled();
});
it('does not trigger parent onDropMove when moving on drop child', () => {
let tree = renderNestedDrop();
let droppableParent = tree.getAllByRole('button')[0];
let droppableChild = droppableParent.firstChild;
let dataTransfer = new DataTransfer();
fireEvent(droppableChild, new DragEvent('dragenter', {dataTransfer, clientX: 1, clientY: 1}));
fireEvent(droppableChild, new DragEvent('dragover', {dataTransfer, clientX: 2, clientY: 2}));
expect(onDropMoveChild).toHaveBeenCalledTimes(1);
expect(onDropMoveChild).toHaveBeenCalledWith({
type: 'dropmove',
x: 2,
y: 2
});
expect(onDropMoveParent).not.toHaveBeenCalled();
});
});
});
describe('drag data', () => {
it('should work with custom data types', async () => {
let getItems = () => [{
test: 'test data'
}];
let onDrop = jest.fn();
let tree = render(<>
<Draggable getItems={getItems} />
<Droppable onDrop={onDrop} />
</>);
let draggable = tree.getByText('Drag me');
let droppable = tree.getByText('Drop here');
let dataTransfer = new DataTransfer();
fireEvent(draggable, new DragEvent('dragstart', {dataTransfer, clientX: 0, clientY: 0}));
expect([...dataTransfer.items]).toEqual([new DataTransferItem('test', 'test data')]);
fireEvent(droppable, new DragEvent('dragenter', {dataTransfer, clientX: 1, clientY: 1}));
fireEvent(droppable, new DragEvent('drop', {dataTransfer, clientX: 2, clientY: 2}));
act(() => jest.runAllTimers());
expect(onDrop).toHaveBeenCalledTimes(1);
expect(onDrop).toHaveBeenCalledWith({
type: 'drop',
x: 2,
y: 2,
dropOperation: 'move',
items: [
{
kind: 'text',
types: new Set(['test']),
getText: expect.any(Function)
}
]
});
expect(await onDrop.mock.calls[0][0].items[0].getText('test')).toBe('test data');
});
it('should work with multiple items of the same custom type', async () => {
let getItems = () => [{
test: 'item 1'
}, {
test: 'item 2'
}];
let onDrop = jest.fn();
let tree = render(<>
<Draggable getItems={getItems} />
<Droppable onDrop={onDrop} />
</>);
let draggable = tree.getByText('Drag me');
let droppable = tree.getByText('Drop here');
let dataTransfer = new DataTransfer();
fireEvent(draggable, new DragEvent('dragstart', {dataTransfer, clientX: 0, clientY: 0}));
expect([...dataTransfer.items]).toEqual([
new DataTransferItem('test', 'item 1'),
new DataTransferItem(
CUSTOM_DRAG_TYPE,
JSON.stringify([{test: 'item 1'}, {test: 'item 2'}]
))
]);
fireEvent(droppable, new DragEvent('dragenter', {dataTransfer, clientX: 1, clientY: 1}));
fireEvent(droppable, new DragEvent('drop', {dataTransfer, clientX: 2, clientY: 2}));
act(() => jest.runAllTimers());
expect(onDrop).toHaveBeenCalledTimes(1);
expect(onDrop).toHaveBeenCalledWith({
type: 'drop',
x: 2,
y: 2,
dropOperation: 'move',
items: [
{
kind: 'text',
types: new Set(['test']),
getText: expect.any(Function)
},
{
kind: 'text',
types: new Set(['test']),
getText: expect.any(Function)
}
]
});
expect(await onDrop.mock.calls[0][0].items[0].getText('test')).toBe('item 1');
expect(await onDrop.mock.calls[0][0].items[1].getText('test')).toBe('item 2');
});
it('should work with items of multiple types', async () => {
let getItems = () => [{
test: 'test data',
'text/plain': 'test data'
}];
let onDrop = jest.fn();
let tree = render(<>
<Draggable getItems={getItems} />
<Droppable onDrop={onDrop} />
</>);
let draggable = tree.getByText('Drag me');
let droppable = tree.getByText('Drop here');
let dataTransfer = new DataTransfer();
fireEvent(draggable, new DragEvent('dragstart', {dataTransfer, clientX: 0, clientY: 0}));
expect([...dataTransfer.items]).toEqual([
new DataTransferItem('test', 'test data'),
new DataTransferItem('text/plain', 'test data'),
new DataTransferItem(
CUSTOM_DRAG_TYPE,
JSON.stringify([{test: 'test data', 'text/plain': 'test data'}]
))
]);
fireEvent(droppable, new DragEvent('dragenter', {dataTransfer, clientX: 1, clientY: 1}));
fireEvent(droppable, new DragEvent('drop', {dataTransfer, clientX: 2, clientY: 2}));
act(() => jest.runAllTimers());
expect(onDrop).toHaveBeenCalledTimes(1);
expect(onDrop).toHaveBeenCalledWith({
type: 'drop',
x: 2,
y: 2,
dropOperation: 'move',
items: [
{
kind: 'text',
types: new Set(['test', 'text/plain']),
getText: expect.any(Function)
}
]
});
expect(await onDrop.mock.calls[0][0].items[0].getText('test')).toBe('test data');
expect(await onDrop.mock.calls[0][0].items[0].getText('text/plain')).toBe('test data');
});
it('should work with multiple items of multiple types', async () => {
let getItems = () => [{
test: 'item 1',
'text/plain': 'item 1'
}, {
test: 'item 2',
'text/plain': 'item 2'
}];
let onDrop = jest.fn();
let tree = render(<>
<Draggable getItems={getItems} />
<Droppable onDrop={onDrop} />
</>);
let draggable = tree.getByText('Drag me');
let droppable = tree.getByText('Drop here');
let dataTransfer = new DataTransfer();
fireEvent(draggable, new DragEvent('dragstart', {dataTransfer, clientX: 0, clientY: 0}));
expect([...dataTransfer.items]).toEqual([
new DataTransferItem('test', 'item 1'),
new DataTransferItem('text/plain', 'item 1\nitem 2'),
new DataTransferItem(
CUSTOM_DRAG_TYPE,
JSON.stringify([
{test: 'item 1', 'text/plain': 'item 1'},
{test: 'item 2', 'text/plain': 'item 2'}
]
))
]);
fireEvent(droppable, new DragEvent('dragenter', {dataTransfer, clientX: 1, clientY: 1}));
fireEvent(droppable, new DragEvent('drop', {dataTransfer, clientX: 2, clientY: 2}));
act(() => jest.runAllTimers());
expect(onDrop).toHaveBeenCalledTimes(1);
expect(onDrop).toHaveBeenCalledWith({
type: 'drop',
x: 2,
y: 2,
dropOperation: 'move',
items: [
{
kind: 'text',
types: new Set(['test', 'text/plain']),
getText: expect.any(Function)
},
{
kind: 'text',
types: new Set(['test', 'text/plain']),
getText: expect.any(Function)
}
]
});
expect(await onDrop.mock.calls[0][0].items[0].getText('test')).toBe('item 1');
expect(await onDrop.mock.calls[0][0].items[0].getText('text/plain')).toBe('item 1');
expect(await onDrop.mock.calls[0][0].items[1].getText('test')).toBe('item 2');
expect(await onDrop.mock.calls[0][0].items[1].getText('text/plain')).toBe('item 2');
});
it('should support dropping multiple native types', async () => {
let onDrop = jest.fn();
let tree = render(<Droppable onDrop={onDrop} />);
let droppable = tree.getByText('Drop here');
let dataTransfer = new DataTransfer();
dataTransfer.items.add('hello world', 'text/plain');
dataTransfer.items.add('<p>hello world</p>', 'text/html');
fireEvent(droppable, new DragEvent('dragenter', {dataTransfer, clientX: 1, clientY: 1}));
fireEvent(droppable, new DragEvent('drop', {dataTransfer, clientX: 2, clientY: 2}));
act(() => jest.runAllTimers());
expect(onDrop).toHaveBeenCalledTimes(1);
expect(onDrop).toHaveBeenCalledWith({
type: 'drop',
x: 2,
y: 2,
dropOperation: 'move',
items: [
{
kind: 'text',
types: new Set(['text/plain', 'text/html']),
getText: expect.any(Function)
}
]
});
expect(await onDrop.mock.calls[0][0].items[0].getText('text/plain')).toBe('hello world');
expect(await onDrop.mock.calls[0][0].items[0].getText('text/html')).toBe('<p>hello world</p>');
});
describe('files', () => {
it('should support dropping files', async () => {
let onDrop = jest.fn();
let tree = render(<Droppable onDrop={onDrop} />);
let droppable = tree.getByText('Drop here');
let dataTransfer = new DataTransfer();
let file = new File(['hello world'], 'test.txt', {type: 'text/plain'});
dataTransfer.items.add(file);
fireEvent(droppable, new DragEvent('dragenter', {dataTransfer, clientX: 1, clientY: 1}));
fireEvent(droppable, new DragEvent('drop', {dataTransfer, clientX: 2, clientY: 2}));
act(() => jest.runAllTimers());
expect(onDrop).toHaveBeenCalledTimes(1);
expect(onDrop).toHaveBeenCalledWith({
type: 'drop',
x: 2,
y: 2,
dropOperation: 'move',
items: [
{
kind: 'file',
type: 'text/plain',
name: 'test.txt',
getText: expect.any(Function),
getFile: expect.any(Function)
}
]
});
expect(await onDrop.mock.calls[0][0].items[0].getText()).toBe('hello world');
expect(await onDrop.mock.calls[0][0].items[0].getFile()).toBe(file);
});
it('should support dropping multiple files', async () => {
let onDrop = jest.fn();
let tree = render(<Droppable onDrop={onDrop} />);
let droppable = tree.getByText('Drop here');
let dataTransfer = new DataTransfer();
let file1 = new File(['hello world'], 'test.txt', {type: 'text/plain'});
let file2 = new File(['<p>hello world</p>'], 'test.html', {type: 'text/html'});
dataTransfer.items.add(file1);
dataTransfer.items.add(file2);
fireEvent(droppable, new DragEvent('dragenter', {dataTransfer, clientX: 1, clientY: 1}));
fireEvent(droppable, new DragEvent('drop', {dataTransfer, clientX: 2, clientY: 2}));
act(() => jest.runAllTimers());
expect(onDrop).toHaveBeenCalledTimes(1);
expect(onDrop).toHaveBeenCalledWith({
type: 'drop',
x: 2,
y: 2,
dropOperation: 'move',
items: [
{
kind: 'file',
type: 'text/plain',
name: 'test.txt',
getText: expect.any(Function),
getFile: expect.any(Function)
},
{
kind: 'file',
type: 'text/html',
name: 'test.html',
getText: expect.any(Function),
getFile: expect.any(Function)
}
]
});
expect(await onDrop.mock.calls[0][0].items[0].getText()).toBe('hello world');
expect(await onDrop.mock.calls[0][0].items[0].getFile()).toBe(file1);
expect(await onDrop.mock.calls[0][0].items[1].getText()).toBe('<p>hello world</p>');
expect(await onDrop.mock.calls[0][0].items[1].getFile()).toBe(file2);
});
it('should support dropping both text and files', async () => {
let onDrop = jest.fn();
let tree = render(<Droppable onDrop={onDrop} />);
let droppable = tree.getByText('Drop here');
let dataTransfer = new DataTransfer();
let file = new File(['hello world'], 'test.txt', {type: 'text/plain'});
dataTransfer.items.add(file);
dataTransfer.items.add('<p>hello world</p>', 'text/html');
fireEvent(droppable, new DragEvent('dragenter', {dataTransfer, clientX: 1, clientY: 1}));
fireEvent(droppable, new DragEvent('drop', {dataTransfer, clientX: 2, clientY: 2}));
act(() => jest.runAllTimers());
expect(onDrop).toHaveBeenCalledTimes(1);
expect(onDrop).toHaveBeenCalledWith({
type: 'drop',
x: 2,
y: 2,
dropOperation: 'move',
items: [
{
kind: 'file',
type: 'text/plain',
name: 'test.txt',
getText: expect.any(Function),
getFile: expect.any(Function)
},
{
kind: 'text',
types: new Set(['text/html']),
getText: expect.any(Function)
}
]
});
expect(await onDrop.mock.calls[0][0].items[0].getText()).toBe('hello world');
expect(await onDrop.mock.calls[0][0].items[0].getFile()).toBe(file);
expect(await onDrop.mock.calls[0][0].items[1].getText('text/html')).toBe('<p>hello world</p>');
});
it('should support dropping directories', async () => {
let onDrop = jest.fn();
let tree = render(<Droppable onDrop={onDrop} />);
let droppable = tree.getByText('Drop here');
let dataTransfer = new DataTransfer();
let dir = new FileSystemDirectoryEntry('test', [
new FileSystemFileEntry(new File(['hello world'], 'test.txt', {type: 'text/plain'})),
new FileSystemDirectoryEntry('nested', [
new FileSystemFileEntry(new File(['<p>foo</p>'], 'foo.html', {type: 'text/html'}))
])
]);
dataTransfer.items.add(dir);
fireEvent(droppable, new DragEvent('dragenter', {dataTransfer, clientX: 1, clientY: 1}));
fireEvent(droppable, new DragEvent('drop', {dataTransfer, clientX: 2, clientY: 2}));
act(() => jest.runAllTimers());
expect(onDrop).toHaveBeenCalledTimes(1);
expect(onDrop).toHaveBeenCalledWith({
type: 'drop',
x: 2,
y: 2,
dropOperation: 'move',
items: [
{
kind: 'directory',
name: 'test',
getEntries: expect.any(Function)
}
]
});
let collect = async (dir) => {
let entries = [];
for await (let entry of dir.getEntries()) {
entries.push(entry);
}
return entries;
};
let entries = await collect(onDrop.mock.calls[0][0].items[0]);
expect(entries).toEqual([
{
kind: 'file',
type: 'text/plain',
name: 'test.txt',
getText: expect.any(Function),
getFile: expect.any(Function)
},
{
kind: 'directory',
name: 'nested',
getEntries: expect.any(Function)
}
]);
expect(await entries[0].getText()).toBe('hello world');
expect(await collect(entries[1])).toEqual([
{
kind: 'file',
type: 'text/html',
name: 'foo.html',
getText: expect.any(Function),
getFile: expect.any(Function)
}
]);
});
it('should handle unknown file types using a generic mime type', async () => {
let onDrop = jest.fn();
let tree = render(<Droppable onDrop={onDrop} />);
let droppable = tree.getByText('Drop here');
let dataTransfer = new DataTransfer();
let file = new File(['hello world'], 'test.abc', {type: ''});
dataTransfer.items.add(file);
fireEvent(droppable, new DragEvent('dragenter', {dataTransfer, clientX: 1, clientY: 1}));
fireEvent(droppable, new DragEvent('drop', {dataTransfer, clientX: 2, clientY: 2}));
act(() => jest.runAllTimers());
expect(onDrop).toHaveBeenCalledTimes(1);
expect(onDrop).toHaveBeenCalledWith({
type: 'drop',
x: 2,
y: 2,
dropOperation: 'move',
items: [
{
kind: 'file',
type: 'application/octet-stream',
name: 'test.abc',
getText: expect.any(Function),
getFile: expect.any(Function)
}
]
});
expect(await onDrop.mock.calls[0][0].items[0].getText()).toBe('hello world');
expect(await onDrop.mock.calls[0][0].items[0].getFile()).toBe(file);
});
});
});
describe('drop operations', () => {
it('should support getDropOperation to override the default operation', () => {
let onDragEnd = jest.fn();
let onDrop = jest.fn();
let getDropOperation = jest.fn().mockImplementation(() => 'copy');
let tree = render(<>
<Draggable onDragEnd={onDragEnd} />
<Droppable getDropOperation={getDropOperation} onDrop={onDrop} />
</>);
let draggable = tree.getByText('Drag me');
let droppable = tree.getByText('Drop here');
let dataTransfer = new DataTransfer();
fireEvent(draggable, new DragEvent('dragstart', {dataTransfer, clientX: 0, clientY: 0}));
expect(dataTransfer.dropEffect).toBe('none');
fireEvent(droppable, new DragEvent('dragenter', {dataTransfer, clientX: 0, clientY: 0}));
expect(getDropOperation).toHaveBeenCalledWith(new DragTypes(dataTransfer), ['move', 'copy', 'link']);
expect(dataTransfer.dropEffect).toBe('copy');
expect(droppable).toHaveAttribute('data-droptarget', 'true');
fireEvent(droppable, new DragEvent('drop', {dataTransfer, clientX: 0, clientY: 0}));
act(() => jest.runAllTimers());
expect(onDrop).toHaveBeenCalledWith({
type: 'drop',
x: 0,
y: 0,
dropOperation: 'copy',
items: [
{
kind: 'text',
types: new Set(['text/plain']),
getText: expect.any(Function)
}
]
});
fireEvent(draggable, new DragEvent('dragend', {dataTransfer, clientX: 2, clientY: 2}));
expect(onDragEnd).toHaveBeenCalledTimes(1);
expect(onDragEnd).toHaveBeenCalledWith({
type: 'dragend',
x: 2,
y: 2,
dropOperation: 'copy'
});
});
it('should support getAllowedDropOperations to limit allowed operations', () => {
let onDragEnd = jest.fn();
let onDrop = jest.fn();
let getDropOperation = jest.fn().mockImplementation(() => 'copy');
let getAllowedDropOperations = jest.fn().mockImplementation(() => ['copy']);
let tree = render(<>
<Draggable getAllowedDropOperations={getAllowedDropOperations} onDragEnd={onDragEnd} />
<Droppable onDrop={onDrop} getDropOperation={getDropOperation} />
</>);
let draggable = tree.getByText('Drag me');
let droppable = tree.getByText('Drop here');
let dataTransfer = new DataTransfer();
fireEvent(draggable, new DragEvent('dragstart', {dataTransfer, clientX: 0, clientY: 0}));
expect(getAllowedDropOperations).toHaveBeenCalledTimes(1);
expect(dataTransfer.dropEffect).toBe('none');
fireEvent(droppable, new DragEvent('dragenter', {dataTransfer, clientX: 0, clientY: 0}));
expect(getDropOperation).toHaveBeenCalledWith(new DragTypes(dataTransfer), ['copy']);
expect(dataTransfer.dropEffect).toBe('copy');
expect(droppable).toHaveAttribute('data-droptarget', 'true');
fireEvent(droppable, new DragEvent('drop', {dataTransfer, clientX: 0, clientY: 0}));
act(() => jest.runAllTimers());
expect(onDrop).toHaveBeenCalledWith({
type: 'drop',
x: 0,
y: 0,
dropOperation: 'copy',
items: [
{
kind: 'text',
types: new Set(['text/plain']),
getText: expect.any(Function)
}
]
});
fireEvent(draggable, new DragEvent('dragend', {dataTransfer, clientX: 2, clientY: 2}));
expect(onDragEnd).toHaveBeenCalledTimes(1);
expect(onDragEnd).toHaveBeenCalledWith({
type: 'dragend',
x: 2,
y: 2,
dropOperation: 'copy'
});
});
it('should support canceling drops with getDropOperation', () => {
let onDropEnter = jest.fn();
let onDragEnd = jest.fn();
let onDrop = jest.fn();
let getDropOperation = jest.fn().mockImplementation(() => 'cancel');
let tree = render(<>
<Draggable onDragEnd={onDragEnd} />
<Droppable getDropOperation={getDropOperation} onDropEnter={onDropEnter} onDrop={onDrop} />
</>);
let draggable = tree.getByText('Drag me');
let droppable = tree.getByText('Drop here');
let dataTransfer = new DataTransfer();
fireEvent(draggable, new DragEvent('dragstart', {dataTransfer, clientX: 0, clientY: 0}));
expect(dataTransfer.dropEffect).toBe('none');
fireEvent(droppable, new DragEvent('dragenter', {dataTransfer, clientX: 0, clientY: 0}));
expect(dataTransfer.dropEffect).toBe('none');
expect(droppable).toHaveAttribute('data-droptarget', 'false');