core.test.ts

import { get } from 'svelte/store'
import { locale, _, translations, clear, locales } from './core'

const translate = (message: string, interpolation?: any) => get(_)(message, interpolation)

beforeEach(() => {
  clear()
  translations.update({
    en: {
      name: 'Name',
    },
    pt: {
      name: 'Nome',
    },
  })
  locale.set('en')
})

describe('#translate', () => {
  it('basic example should work', () => {
    expect(translate('name')).toBe('Name')
  })

  it('should set locale', () => {
    expect(get(locale)).toBe('en')
    expect(translate('name')).toBe('Name')
    locale.set('pt')
    expect(get(locale)).toBe('pt')
    expect(translate('name')).toBe('Nome')
  })

  it('should extend translations', () => {
    translations.update({
      en: {
        hello: 'hello',
      },
    })
    expect(translate('name')).toBe('Name')
    expect(translate('hello')).toBe('hello')
  })

  it('should translate nested keys', () => {
    translations.update({
      en: {
        foo: {
          bar: {
            baz: 'hello, {name}',
          },
        },
      },
    })
    expect(translate('foo.bar.baz', { name: 'john' }))
      .toBe('hello, john')
  })

  it('should return path if key is missing', () => {
    expect(translate('missing')).toBe('missing')
  })

  it('should warn if locale messages are missing', () => {
    console.error = jest.fn()
    const log = console.error as jest.Mock
    locale.set('ru')

    expect(log).toHaveBeenCalledWith('[svelte-intl] Couldn\'t find the "ru" locale.')
    log.mockRestore()
  })

  it('subscribe should work', (done) => {
    const unsubscribe = _.subscribe((format) => {
      if (format('name') === 'Name') {
        return
      }
      expect(translate('name')).toBe('Nome')
      unsubscribe()
      done()
    })
    locale.set('pt')
  })
  test('#locales', () => {
    expect(get(locales)).toEqual(['en', 'pt'])
    translations.update({
      ru: {
        name: 'название',
      },
    })
    expect(get(locales)).toEqual(['en', 'pt', 'ru'])
  })
})