d2/src/lib/__tests__/utils.spec.js

Javascript library for DHIS2

import * as utils from '../utils'

describe('Utils', () => {
    describe('throwError', () => {
        it('should throw an error', () => {
            function shouldThrow() {
                utils.throwError('MyMessage')
            }

            expect(shouldThrow).toThrowError('MyMessage')
        })
    })

    describe('pick', () => {
        const object = {
            name: 'Mark',
            users: ['mark', 'this', 'color'],
        }

        it('should return the value of the property', () => {
            expect(utils.pick('name')(object)).toBe('Mark')
            expect(utils.pick('users')(object)).toBe(object.users)
        })

        it('should return undefined if the property does not exist', () => {
            expect(utils.pick('groups')(object)).toBeUndefined()
        })

        it('should return undefined if the object is undefined', () => {
            expect(utils.pick('name')(undefined)).toBeUndefined()
        })

        it('should support property paths', () => {
            const value = {
                user: {
                    name: 'Mark',
                    settings: {
                        disabled: false,
                    },
                },
            }

            expect(utils.pick('user.name')(value)).toBe('Mark')
            expect(utils.pick('user.settings.disabled')(value)).toBe(false)
        })

        it('should not throw when a property in the path does not exist', () => {
            const value = {}

            expect(() => utils.pick('user.name')(value)).not.toThrow()
            expect(() =>
                utils.pick('user.settings.disabled')(value)
            ).not.toThrow()
        })
    })

    describe('updateAPIUrlWithBaseUrlVersionNumber()', () => {
        const baseUrl = 'https://www.whitehouse.gov/secret/top/dhis/api'

        it('works with unreasonable api versions', () => {
            for (let i = 10; i < 99; i++) {
                expect(
                    utils.updateAPIUrlWithBaseUrlVersionNumber(
                        'https://localhost:8080/dhis/api/dataSetElements/abcDEFghi3',
                        `${baseUrl}/${i}`
                    )
                ).toBe(
                    `https://localhost:8080/dhis/api/${i}/dataSetElements/abcDEFghi3`
                )
            }
        })
    })

    describe('pickOr', () => {
        it('should return the defaultValue if it was defined', () => {
            const value = {}

            expect(utils.pickOr('user.name', 'John')(value)).toBe('John')
            expect(utils.pickOr('user.settings.disabled', true)(value)).toBe(
                true
            )
        })

        it('should return a null value over a default if it exists', () => {
            const value = {
                user: {
                    name: null,
                    settings: {
                        disabled: false,
                    },
                },
            }

            expect(utils.pickOr('user.name', 'John')(value)).toBe(null)
            expect(utils.pickOr('user.settings.disabled', true)(value)).toBe(
                false
            )
        })
    })
})