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cleanup tests
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‎test/ScrollLock.test.jsx

Lines changed: 27 additions & 140 deletions
Original file line numberDiff line numberDiff line change
@@ -4,280 +4,175 @@ import { shallow } from 'enzyme';
44

55
import ScrollLock from '../src/ScrollLock';
66

7+
const scrollLockInstance = props =>
8+
shallow(<ScrollLock {...props}><div /></ScrollLock>).instance();
9+
710
describe('ScrollLock', () => {
11+
afterEach(() => {
12+
jest.resetAllMocks();
13+
});
814
describe('component lifecycle methods', () => {
9-
afterEach(() => {
10-
jest.resetAllMocks();
11-
});
1215
it('componentDidMount - enabled', () => {
13-
const component = shallow(
14-
<ScrollLock>
15-
<div />
16-
</ScrollLock>
17-
).instance();
16+
const component = scrollLockInstance();
1817
component.listenToScrollEvents = jest.fn();
19-
2018
component.componentDidMount();
21-
2219
expect(component.listenToScrollEvents).toBeCalled();
2320
});
2421
it('componentDidMount - enabled=false', () => {
25-
const component = shallow(
26-
<ScrollLock enabled={false}>
27-
<div />
28-
</ScrollLock>
29-
).instance();
22+
const component = scrollLockInstance({ enabled: false });
3023
component.listenToScrollEvents = jest.fn();
31-
3224
component.componentDidMount();
33-
3425
expect(component.listenToScrollEvents).toHaveBeenCalledTimes(0);
3526
});
3627
it('componentWillUnmount', () => {
37-
const component = shallow(
38-
<ScrollLock enabled={false}>
39-
<div />
40-
</ScrollLock>
41-
).instance();
28+
const component = scrollLockInstance();
4229
component.stopListeningToScrollEvents = jest.fn();
43-
4430
component.componentWillUnmount();
45-
4631
expect(component.stopListeningToScrollEvents).toBeCalled();
4732
});
4833
it('componentWillReceiveProps - disabled to enabled', () => {
49-
const component = shallow(
50-
<ScrollLock enabled={false}>
51-
<div />
52-
</ScrollLock>
53-
).instance();
34+
const component = scrollLockInstance({ enabled: false });
5435
component.listenToScrollEvents = jest.fn();
55-
5636
component.componentWillReceiveProps({ enabled: true });
57-
5837
expect(component.listenToScrollEvents).toBeCalled();
5938
});
6039
it('componentWillReceiveProps - enabled to disabled', () => {
61-
const component = shallow(
62-
<ScrollLock>
63-
<div />
64-
</ScrollLock>
65-
).instance();
40+
const component = scrollLockInstance();
6641
component.stopListeningToScrollEvents = jest.fn();
67-
6842
component.componentWillReceiveProps({ enabled: false });
69-
7043
expect(component.stopListeningToScrollEvents).toBeCalled();
7144
});
7245
});
73-
7446
describe('component methods', () => {
7547
describe('setScrollingElement', () => {
7648
it('should set the scrolling element to firstChild', () => {
77-
const component = shallow(
78-
<ScrollLock>
79-
<div />
80-
</ScrollLock>
81-
).instance();
82-
49+
const component = scrollLockInstance();
8350
assert.equal(component.scrollingElement, undefined);
84-
8551
const firstChild = <div>BLAH BLAH TEST BLAH</div>;
8652
component.setScrollingElement({ firstChild });
87-
8853
assert.equal(component.scrollingElement, firstChild);
8954
});
9055
it('should set the scrolling element to undefined if no argument passed', () => {
91-
const component = shallow(
92-
<ScrollLock>
93-
<div />
94-
</ScrollLock>
95-
).instance();
96-
56+
const component = scrollLockInstance();
9757
component.setScrollingElement();
98-
9958
assert.equal(component.scrollingElement, undefined);
10059
});
10160
});
102-
10361
describe('handleEventDelta', () => {
104-
afterEach(() => {
105-
jest.resetAllMocks();
106-
});
10762
it('should cancel scroll event if delta beaks lower limit', () => {
108-
const component = shallow(
109-
<ScrollLock>
110-
<div />
111-
</ScrollLock>
112-
).instance();
63+
const component = scrollLockInstance();
11364
component.cancelScrollEvent = jest.fn();
11465
component.scrollingElement = {
11566
scrollTop: 50,
11667
scrollHeight: 450,
11768
clientHeight: 400
11869
};
119-
12070
component.handleEventDelta({}, -60);
121-
122-
// scroll top should be 0
12371
assert.equal(component.scrollingElement.scrollTop, 0);
12472
expect(component.cancelScrollEvent).toBeCalled();
12573
});
12674
it('should cancel scroll event if delta breaks upper limit', () => {
12775
const scrollHeight = 450;
128-
const component = shallow(
129-
<ScrollLock>
130-
<div />
131-
</ScrollLock>
132-
).instance();
76+
const component = scrollLockInstance();
13377
component.cancelScrollEvent = jest.fn();
13478
component.scrollingElement = {
13579
scrollTop: 400,
13680
scrollHeight,
13781
clientHeight: 400
13882
};
139-
14083
component.handleEventDelta({}, 60);
141-
142-
// scroll top should be scrollHeight of scrollingElement
14384
assert.equal(component.scrollingElement.scrollTop, scrollHeight);
14485
expect(component.cancelScrollEvent).toBeCalled();
14586
});
14687
});
147-
14888
describe('onWheelHandler', () => {
14989
it('should call handleEventDelta with correct args', () => {
15090
const synthEvent = {
15191
deltaY: 60
15292
};
153-
const component = shallow(
154-
<ScrollLock>
155-
<div />
156-
</ScrollLock>
157-
).instance();
93+
const component = scrollLockInstance();
15894
component.handleEventDelta = jest.fn();
159-
16095
component.onWheelHandler(synthEvent);
161-
16296
expect(component.handleEventDelta).toBeCalledWith(synthEvent, synthEvent.deltaY);
16397
jest.resetAllMocks();
16498
});
16599
});
166-
167100
describe('onTouchStartHandler', () => {
168101
it('should set this.touchStart', () => {
169102
const touchClientY = 50;
170-
const component = shallow(
171-
<ScrollLock>
172-
<div />
173-
</ScrollLock>
174-
).instance();
103+
const component = scrollLockInstance();
175104
component.onTouchStartHandler({
176105
changedTouches: [{ clientY: touchClientY }]
177106
});
178107
assert.equal(component.touchStart, touchClientY);
179108
});
180109
});
181-
182110
describe('onTouchMoveHandler', () => {
183111
it('should call handleEventDelta with correct args', () => {
184112
const touchClientY = 70;
185113
const touchStart = 50;
186114
const synthEvent = {
187115
changedTouches: [{ clientY: touchClientY }]
188116
};
189-
const component = shallow(
190-
<ScrollLock>
191-
<div />
192-
</ScrollLock>
193-
).instance();
117+
const component = scrollLockInstance();
194118
component.handleEventDelta = jest.fn();
195119
component.touchStart = touchStart;
196-
197120
component.onTouchMoveHandler(synthEvent);
198-
199121
expect(component.handleEventDelta)
200122
.toBeCalledWith(synthEvent, touchStart - touchClientY);
201123
});
202124
});
203125
describe('onKeyDownHandler', () => {
204126
let component;
205-
let synthEvent;
206127
beforeEach(() => {
207-
component = shallow(
208-
<ScrollLock>
209-
<div />
210-
</ScrollLock>
211-
).instance();
128+
component = scrollLockInstance();
212129
component.handleEventDelta = jest.fn();
213130
});
214-
afterEach(() => {
215-
jest.resetAllMocks();
216-
});
217131
it('should call handleEventDelta with delta of 1 for space bar', () => {
218-
synthEvent = { keyCode: 32 };
132+
const synthEvent = { keyCode: 32 };
219133
component.onKeyDownHandler(synthEvent);
220134
expect(component.handleEventDelta).toBeCalledWith(synthEvent, 1);
221135
});
222136
it('should call handleEventDelta with delta of 1 for pageDown', () => {
223-
synthEvent = { keyCode: 34 };
137+
const synthEvent = { keyCode: 34 };
224138
component.onKeyDownHandler(synthEvent);
225139
expect(component.handleEventDelta).toBeCalledWith(synthEvent, 1);
226140
});
227141
it('should call handleEventDelta with delta of 1 for downArrow', () => {
228-
synthEvent = { keyCode: 40 };
142+
const synthEvent = { keyCode: 40 };
229143
component.onKeyDownHandler(synthEvent);
230144
expect(component.handleEventDelta).toBeCalledWith(synthEvent, 1);
231145
});
232146
it('should call handleEventDelta with delta of -1 for pageUp', () => {
233-
synthEvent = { keyCode: 33 };
147+
const synthEvent = { keyCode: 33 };
234148
component.onKeyDownHandler(synthEvent);
235149
expect(component.handleEventDelta).toBeCalledWith(synthEvent, -1);
236150
});
237151
it('should call handleEventDelta with delta of -1 for arrowUp', () => {
238-
synthEvent = { keyCode: 38 };
152+
const synthEvent = { keyCode: 38 };
239153
component.onKeyDownHandler(synthEvent);
240154
expect(component.handleEventDelta).toBeCalledWith(synthEvent, -1);
241155
});
242156
});
243-
244157
describe('cancelScrollEvent component method', () => {
245158
it('should cancel scroll event', () => {
246159
const synthEvent = {
247160
stopImmediatePropagation: jest.fn(),
248161
preventDefault: jest.fn()
249162
};
250-
const component = shallow(
251-
<ScrollLock>
252-
<div />
253-
</ScrollLock>
254-
).instance();
255-
163+
const component = scrollLockInstance();
256164
component.cancelScrollEvent(synthEvent);
257-
258165
expect(synthEvent.stopImmediatePropagation).toBeCalled();
259166
expect(synthEvent.preventDefault).toBeCalled();
260-
261-
jest.resetAllMocks();
262167
});
263168
});
264-
265169
describe('listenToScrollEvents component method', () => {
266-
afterEach(() => {
267-
jest.resetAllMocks();
268-
});
269170
it('should add the proper event listeners', () => {
270171
const scrollingElement = {
271172
addEventListener: jest.fn()
272173
};
273-
const component = shallow(
274-
<ScrollLock>
275-
<div />
276-
</ScrollLock>
277-
).instance();
278-
174+
const component = scrollLockInstance();
279175
component.listenToScrollEvents(scrollingElement);
280-
281176
const expectedCalls = [
282177
['wheel', component.onWheelHandler, false],
283178
['touchstart', component.onTouchStartHandler, false],
@@ -288,19 +183,11 @@ describe('ScrollLock', () => {
288183
});
289184
});
290185
describe('stopListeningToScrollEvents component method', () => {
291-
afterEach(() => {
292-
jest.resetAllMocks();
293-
});
294186
it('should remove the proper event listeners', () => {
295187
const scrollingElement = {
296188
removeEventListener: jest.fn()
297189
};
298-
const component = shallow(
299-
<ScrollLock>
300-
<div />
301-
</ScrollLock>
302-
).instance();
303-
190+
const component = scrollLockInstance();
304191
component.stopListeningToScrollEvents(scrollingElement);
305192
const expectedCalls = [
306193
['wheel', component.onWheelHandler, false],

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