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import { assoc } from './assoc.js'
test('adds a key to an empty object', () => {  expect(assoc(    'a', 1, {}  )).toEqual({ a : 1 })})
test('adds a key to a non-empty object', () => {  expect(assoc(    'b', 2, { a : 1 }  )).toEqual({    a : 1,    b : 2,  })})
test('adds a key to a non-empty object - curry case 1', () => {  expect(assoc('b', 2)({ a : 1 })).toEqual({    a : 1,    b : 2,  })})
test('adds a key to a non-empty object - curry case 2', () => {  expect(assoc('b')(2, { a : 1 })).toEqual({    a : 1,    b : 2,  })})
test('adds a key to a non-empty object - curry case 3', () => {  const result = assoc('b')(2)({ a : 1 })
  expect(result).toEqual({    a : 1,    b : 2,  })})
test('changes an existing key', () => {  expect(assoc(    'a', 2, { a : 1 }  )).toEqual({ a : 2 })})
test('undefined is considered an empty object', () => {  expect(assoc(    'a', 1, undefined  )).toEqual({ a : 1 })})
test('null is considered an empty object', () => {  expect(assoc(    'a', 1, null  )).toEqual({ a : 1 })})
test('value can be null', () => {  expect(assoc(    'a', null, null  )).toEqual({ a : null })})
test('value can be undefined', () => {  expect(assoc(    'a', undefined, null  )).toEqual({ a : undefined })})
test('assignment is shallow', () => {  expect(assoc(    'a', { b : 2 }, { a : { c : 3 } }  )).toEqual({ a : { b : 2 } })})