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x/rambda/source/getter.spec.js

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import {add} from './add'import {getter, reset, setter} from './getter'
afterEach(() => { reset()})
test('happy', () => { const key = 'foo' setter(key, 1)
expect(getter(key)).toBe(1)})
test('docs example', () => { setter('foo', 'bar') setter('a', 1) expect(getter(['foo', 'a'])).toEqual({ foo: 'bar', a: 1, })
setter('a', 2) expect(getter('a')).toBe(2) reset() expect(getter('a')).toBeUndefined()})
test('when array is key in getter', () => { setter({ a: 1, b: 2, c: 3, })
expect(getter(['a', 'b'])).toEqual({ a: 1, b: 2, })})
test('getter with undefined as key returns all', () => { const data = { a: 1, b: 2, c: 3, }
setter(data)
expect(getter()).toEqual(data)})
test('function as setter value', () => { const data = { a: 1, b: 2, c: 3, }
setter(data) setter('a', add(10))
expect(getter()).toEqual({ a: 11, b: 2, c: 3, })})
test('setter fallbacks to undefined', () => { expect(setter()).toBeUndefined})