Add class tests

Author: ragulka

test/class.test.ts

@@ -0,0 +1,70 @@
+import { I18n } from '../src'
+
+it('can update options and get the active language', async () => {
+    const i18n = new I18n({ lang: 'en '})
+
+    i18n.setOptions({ lang: 'et' })
+
+    expect(i18n.getActiveLanguage()).toBe('et')
+})
+
+it('can set the active language and its messages', async () => {
+    const i18n = new I18n()
+
+    i18n.setLanguage({ lang: 'pt', messages: { 'Welcome!': 'Bem-vindo!' }})
+
+    expect(i18n.getActiveLanguage()).toBe('pt')
+    expect(i18n.trans('Welcome!')).toBe('Bem-vindo!')
+})
+
+it('does not share state between different instances', async () => {
+    const enI18n = new I18n()
+    const ptI18n = new I18n()
+
+    enI18n.setLanguage({ lang: 'en', messages: { 'Welcome!': 'Welcome!' }})
+    ptI18n.setLanguage({ lang: 'pt', messages: { 'Welcome!': 'Bem-vindo!' }})
+
+    expect(enI18n.getActiveLanguage()).toBe('en')
+    expect(enI18n.trans('Welcome!')).toBe('Welcome!')
+
+    expect(ptI18n.getActiveLanguage()).toBe('pt')
+    expect(ptI18n.trans('Welcome!')).toBe('Bem-vindo!')
+})
+
+it('allows creating a shared instance', async () => {
+    const shared1 = I18n.getSharedInstance()
+    const shared2 = I18n.getSharedInstance()
+
+    expect(shared1).toBeInstanceOf(I18n)
+    expect(shared2).toBe(shared1)
+})
+
+it('allows creating a shared instance with options', async () => {
+    const shared = I18n.getSharedInstance({ lang: 'pt' })
+
+    expect(shared.getActiveLanguage()).toBe('pt')
+})
+
+it('allows updating options when getting a shared instance', async () => {
+    const shared = I18n.getSharedInstance({ lang: 'en' })
+
+    I18n.getSharedInstance({ lang: 'pt' })
+
+    expect(shared.getActiveLanguage()).toBe('pt')
+})
+
+it('allows resetting all data', async () => {
+    const i18n = new I18n({
+        resolve: lang => import(`./fixtures/lang/${lang}.json`)
+    })
+
+    await i18n.loadLanguageAsync('pt')
+
+    expect(i18n.getActiveLanguage()).toBe('pt')
+    expect(i18n.trans('Welcome!')).toBe('Bem-vindo!')
+
+    i18n.reset()
+
+    expect(i18n.getActiveLanguage()).toBe('en')
+    expect(i18n.trans('Welcome!')).toBe('Welcome!')
+})