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index.test.js
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index.test.js
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import test from 'ava'
import jstz from 'jstz'
import browserEnv from 'browser-env'
import inEU, { isInEUTimezone, isEULocale } from './index'
browserEnv()
let originalTZ = jstz.determine
let originalLanguages = window.navigator.languages
let originalLanguage = navigator.language
let originalUserLanguage = navigator.userLanguage
function mockTZ(tz) {
jstz.determine = () => ({
name: () => tz
})
}
function mockLanguages(languages) {
Object.defineProperty(window.navigator, 'languages', {
value: languages,
writable: true
})
}
function mockLanguage(language) {
Object.defineProperty(navigator, 'language', {
value: language,
writable: true
})
}
function mockeUserLanguage(language) {
Object.defineProperty(navigator, 'userLanguage', {
value: language,
writable: true
})
}
function resetMonkeyPatches() {
jstz.determine = originalTZ
Object.defineProperty(navigator, 'languages', {
value: originalLanguages,
writable: true
})
Object.defineProperty(navigator, 'language', {
value: originalLanguage,
writable: true
})
Object.defineProperty(navigator, 'userLanguage', {
value: originalUserLanguage,
writable: true
})
}
test.beforeEach(() => resetMonkeyPatches())
test.serial('inEU -> verifies the visitors timezone and locale (in order)', t => {
// American English speaker in London
mockLanguages(['en-GB'])
mockTZ('Europe/London')
t.true(inEU())
// German speaker in Germany
mockLanguages(['de-DE'])
mockTZ('Europe/Berlin')
t.true(inEU())
// American English speaker in London
mockLanguages(['en-GB'])
mockTZ('Europe/London')
t.true(inEU())
// Hungarian in Brazil
mockLanguages(['HU'])
mockTZ('America/Brasilia')
t.true(inEU())
// Brazilian in New Zeland
mockLanguages(['pt-BR'])
mockTZ('Pacific/Auckland')
t.false(inEU())
})
test.serial('isInEUTimezone -> checks for timezones in Europe', t => {
mockTZ('Europe/Barcelona')
t.true(isInEUTimezone())
mockTZ('America/Chicago')
t.false(isInEUTimezone())
mockTZ('Pacific/Auckland')
t.false(isInEUTimezone())
})
test.serial('isEULocale -> supports `window.navigator.languages`', t => {
// Spain / Spanish
mockLanguages(['es-ES'])
t.true(isEULocale())
// Hungary / Hungarian
mockLanguages(['HU'])
t.true(isEULocale())
// Brazil / Portuguese
mockLanguages(['pt-BR'])
t.false(isEULocale())
})
test.serial('isEULocale -> supports `navigator.userLanguage`', t => {
mockLanguages(undefined)
mockLanguage(undefined)
// Spain / Spanish
mockeUserLanguage('es-ES')
t.true(isEULocale())
// Hungary / Hungarian
mockeUserLanguage('HU')
t.true(isEULocale())
// Brazil / Portuguese
mockeUserLanguage('pt-BR')
t.false(isEULocale())
})
test.serial('isEULocale -> supports `navigator.language`', t => {
// Spain / Spanish
mockLanguages(null)
mockLanguage('es-ES')
t.true(isEULocale())
// Hungary / Hungarian
mockLanguage('HU')
t.true(isEULocale())
// Brazil / Portuguese
mockLanguage('pt-BR')
t.false(isEULocale())
})