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CustomDragLayer component for enabling Drag & Drop ghost row
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Paul Sturgess
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Jul 28, 2017
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184
src/components/drag-and-drop/custom-drag-layer/__spec__.js
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,184 @@ | ||
| import React from 'react'; | ||
| import { UndecoratedCustomDragLayer, collect } from './custom-drag-layer'; | ||
| import { mount } from 'enzyme'; | ||
| import DraggableContext from './../draggable-context'; | ||
|
|
||
| describe('CustomDragLayer', () => { | ||
| let wrapper, instance, child; | ||
|
|
||
| let draggableNode = { | ||
| getBoundingClientRect: () => ( {width: 10} ) | ||
| } | ||
|
|
||
| const DummyComponent = () => { | ||
| return ( | ||
| <div>Test</div> | ||
| ) | ||
| } | ||
|
|
||
| describe('when the component is being dragged and there is a currentOffset and draggable node', () => { | ||
| beforeEach(() => { | ||
| wrapper = mount( | ||
| <DraggableContext onDrag={() => {}}> | ||
| <UndecoratedCustomDragLayer | ||
| className='custom-class-name' | ||
| currentOffset={{x: 1, y: 2}} | ||
| draggableProps={{foo: 'bar'}} | ||
| draggableNode={draggableNode} | ||
| isDragging={true} | ||
| > | ||
| <DummyComponent /> | ||
| </UndecoratedCustomDragLayer> | ||
| </DraggableContext> | ||
| ); | ||
| instance = wrapper.find(UndecoratedCustomDragLayer); | ||
| child = instance.find(DummyComponent) | ||
| }); | ||
|
|
||
| it('renders a clone of the child with the props passed through', () => { | ||
| const childProps = child.props(); | ||
| expect(childProps.customDragLayer).toBeTruthy(); | ||
| expect(childProps.foo).toEqual('bar'); | ||
| expect(childProps.draggableNode).toEqual(draggableNode); | ||
| }); | ||
|
|
||
| it('renders the custom classname', () => { | ||
| expect(instance.find('.custom-class-name').length).toEqual(1); | ||
| expect(instance.find('.custom-drag-layer').length).toEqual(1); | ||
| }); | ||
|
|
||
| it('transforms the component position by the currentOffset', () => { | ||
| const container = instance.find('.custom-drag-layer__container'); | ||
| expect(container.length).toEqual(1); | ||
| const style = container.get(0).style | ||
| expect(style.webkitTransform).toEqual('translate(1px, 2px)'); | ||
| expect(style.width).toEqual('10px'); | ||
| }) | ||
| }); | ||
|
|
||
| describe('when the component is being dragged but there is no currentOffset', () => { | ||
| beforeEach(() => { | ||
| wrapper = mount( | ||
| <DraggableContext onDrag={() => {}}> | ||
| <UndecoratedCustomDragLayer | ||
| className='custom-class-name' | ||
| draggableProps={{foo: 'bar'}} | ||
| draggableNode={draggableNode} | ||
| isDragging={true} | ||
| > | ||
| <DummyComponent /> | ||
| </UndecoratedCustomDragLayer> | ||
| </DraggableContext> | ||
| ); | ||
| instance = wrapper.find(UndecoratedCustomDragLayer); | ||
| }); | ||
|
|
||
| it('sets container to display: none', () => { | ||
| const container = instance.find('.custom-drag-layer__container'); | ||
| expect(container.length).toEqual(1); | ||
| const style = container.get(0).style; | ||
| expect(style.display).toEqual('none'); | ||
| }); | ||
| }); | ||
|
|
||
| describe('when the component is being dragged but there is no draggableNode', () => { | ||
| beforeEach(() => { | ||
| wrapper = mount( | ||
| <DraggableContext onDrag={() => {}}> | ||
| <UndecoratedCustomDragLayer | ||
| className='custom-class-name' | ||
| currentOffset={{x: 1, y: 2}} | ||
| draggableProps={{foo: 'bar'}} | ||
| isDragging={true} | ||
| > | ||
| <DummyComponent /> | ||
| </UndecoratedCustomDragLayer> | ||
| </DraggableContext> | ||
| ); | ||
| instance = wrapper.find(UndecoratedCustomDragLayer); | ||
| }); | ||
|
|
||
| it('does not set the width style', () => { | ||
| const container = instance.find('.custom-drag-layer__container'); | ||
| expect(container.length).toEqual(1); | ||
| const style = container.get(0).style; | ||
| expect(style.webkitTransform).toEqual('translate(1px, 2px)'); | ||
| expect(style.width).toEqual(''); | ||
| }); | ||
| }); | ||
|
|
||
| describe('when the component is not being dragged', () => { | ||
| beforeEach(() => { | ||
| wrapper = mount( | ||
| <DraggableContext onDrag={() => {}}> | ||
| <UndecoratedCustomDragLayer | ||
| className='custom-class-name' | ||
| draggableProps={{foo: 'bar'}} | ||
| draggableNode={draggableNode} | ||
| isDragging={false} | ||
| > | ||
| <DummyComponent /> | ||
| </UndecoratedCustomDragLayer> | ||
| </DraggableContext> | ||
| ); | ||
| instance = wrapper.find(UndecoratedCustomDragLayer); | ||
| child = instance.find(DummyComponent); | ||
| }); | ||
|
|
||
| it('does not render the child component', () => { | ||
| expect(child.length).toEqual(0); | ||
| }); | ||
| }); | ||
|
|
||
| describe('collect', () => { | ||
| let monitor, item; | ||
|
|
||
| describe('when there is an item', () => { | ||
| beforeEach(() => { | ||
| item = { | ||
| draggableProps: 'draggableProps', | ||
| draggableNode: 'draggableNode' | ||
| } | ||
|
|
||
| monitor = { | ||
| getItem: () => item, | ||
| getSourceClientOffset: () => 'currentOffset', | ||
| isDragging: () => true | ||
| } | ||
| }); | ||
|
|
||
| it('returns the draggableProps and draggableNode', () => { | ||
| expect(collect(monitor)).toEqual( | ||
| { | ||
| currentOffset: 'currentOffset', | ||
| item, | ||
| draggableProps: 'draggableProps', | ||
| draggableNode: 'draggableNode', | ||
| isDragging: true | ||
| } | ||
| ) | ||
| }); | ||
| }); | ||
|
|
||
| describe('when there is not an item', () => { | ||
| beforeEach(() => { | ||
| monitor = { | ||
| getItem: () => null, | ||
| getSourceClientOffset: () => 'currentOffset', | ||
| isDragging: () => true | ||
| } | ||
| }) | ||
| it('returns an object without the draggableProps and draggableNode defined', () => { | ||
| expect(collect(monitor)).toEqual( | ||
| { | ||
| currentOffset: 'currentOffset', | ||
| item: null, | ||
| draggableProps: null, | ||
| draggableNode: null, | ||
| isDragging: true | ||
| } | ||
| ) | ||
| }) | ||
| }) | ||
| }); | ||
| }); |
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