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x/rambda/groupBy.spec.js

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import { groupBy } from './groupBy'import { prop } from './prop'
test('groupBy', () => { const list = [ { age : 12, name : 'john', }, { age : 12, name : 'jack', }, { age : 24, name : 'mary', }, { age : 24, name : 'steve', }, ] const expectedResult = { 12 : [ { age : 12, name : 'john', }, { age : 12, name : 'jack', }, ], 24 : [ { age : 24, name : 'mary', }, { age : 24, name : 'steve', }, ], }
expect(groupBy(prop('age'))(list)).toEqual(expectedResult) expect(groupBy(prop('age'), list)).toEqual(expectedResult)})