/
utils.test.js
195 lines (169 loc) 路 5.23 KB
/
utils.test.js
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import {renderHook} from '@testing-library/react'
import {
defaultProps,
getInitialValue,
getDefaultValue,
useMouseAndTouchTracker,
getItemAndIndex,
isDropdownsStateEqual,
} from '../utils'
describe('utils', () => {
describe('itemToString', () => {
test('returns empty string if item is falsy', () => {
const emptyString = defaultProps.itemToString(null)
expect(emptyString).toBe('')
})
})
describe('getItemAndIndex', () => {
test('returns arguments if passed as defined', () => {
expect(getItemAndIndex({}, 5, [])).toEqual([{}, 5])
})
test('throws an error when item and index are not passed', () => {
const errorMessage = 'Pass either item or index to the item getter prop!'
expect(() =>
getItemAndIndex(undefined, undefined, [1, 2, 3], errorMessage),
).toThrowError(errorMessage)
})
test('returns index if item is passed', () => {
const item = {}
expect(getItemAndIndex(item, undefined, [{x: 1}, item, {x: 2}])).toEqual([
item,
1,
])
})
test('returns item if index is passed', () => {
const index = 2
const item = {x: 2}
expect(getItemAndIndex(undefined, 2, [{x: 1}, {x: 3}, item])).toEqual([
item,
index,
])
})
})
test('getInitialValue will not return undefined as initial value', () => {
const defaults = {bogusValue: 'hello'}
const value = getInitialValue(
{initialBogusValue: undefined},
'bogusValue',
defaults,
)
expect(value).toEqual(defaults.bogusValue)
})
test('getInitialValue will not return undefined as value', () => {
const defaults = {bogusValue: 'hello'}
const value = getInitialValue(
{bogusValue: undefined},
'bogusValue',
defaults,
)
expect(value).toEqual(defaults.bogusValue)
})
test('getDefaultValue will not return undefined as value', () => {
const defaults = {bogusValue: 'hello'}
const value = getDefaultValue(
{defaultBogusValue: undefined},
'bogusValue',
defaults,
)
expect(value).toEqual(defaults.bogusValue)
})
describe('useMouseAndTouchTracker', () => {
test('renders without error', () => {
expect(() => {
renderHook(() => useMouseAndTouchTracker(undefined, [], jest.fn()))
}).not.toThrowError()
})
test('adds and removes listeners to environment', () => {
const environment = {
addEventListener: jest.fn(),
removeEventListener: jest.fn(),
}
const refs = []
const handleBlur = jest.fn()
const {unmount, rerender, result} = renderHook(() =>
useMouseAndTouchTracker(environment, refs, handleBlur),
)
expect(environment.addEventListener).toHaveBeenCalledTimes(5)
expect(environment.addEventListener).toHaveBeenCalledWith(
'mousedown',
expect.any(Function),
)
expect(environment.addEventListener).toHaveBeenCalledWith(
'mouseup',
expect.any(Function),
)
expect(environment.addEventListener).toHaveBeenCalledWith(
'touchstart',
expect.any(Function),
)
expect(environment.addEventListener).toHaveBeenCalledWith(
'touchmove',
expect.any(Function),
)
expect(environment.addEventListener).toHaveBeenCalledWith(
'touchend',
expect.any(Function),
)
expect(environment.removeEventListener).not.toHaveBeenCalled()
rerender()
expect(environment.removeEventListener).not.toHaveBeenCalled()
unmount()
expect(environment.addEventListener).toHaveBeenCalledTimes(5)
expect(environment.removeEventListener).toHaveBeenCalledTimes(5)
expect(environment.removeEventListener).toHaveBeenCalledWith(
'mousedown',
expect.any(Function),
)
expect(environment.removeEventListener).toHaveBeenCalledWith(
'mouseup',
expect.any(Function),
)
expect(environment.removeEventListener).toHaveBeenCalledWith(
'touchstart',
expect.any(Function),
)
expect(environment.removeEventListener).toHaveBeenCalledWith(
'touchmove',
expect.any(Function),
)
expect(environment.removeEventListener).toHaveBeenCalledWith(
'touchend',
expect.any(Function),
)
expect(result.current).toEqual({
isMouseDown: false,
isTouchMove: false,
isTouchEnd: false,
})
})
})
describe('isDropdownsStateEqual', () => {
test('is true when each property is equal', () => {
const selectedItem = 'hello'
const prevState = {
highlightedIndex: 2,
isOpen: true,
selectedItem,
inputValue: selectedItem,
}
const newState = {
...prevState,
}
expect(isDropdownsStateEqual(prevState, newState)).toBe(true)
})
test('is false when at least one property is not equal', () => {
const selectedItem = {value: 'hello'}
const prevState = {
highlightedIndex: 2,
isOpen: true,
selectedItem,
inputValue: selectedItem,
}
const newState = {
...prevState,
selectedItem: {...selectedItem},
}
expect(isDropdownsStateEqual(prevState, newState)).toBe(false)
})
})
})