specs for locale switch

frontend/src/components/LanguageSwitch.spec.js

@@ -0,0 +1,95 @@
+import { mount } from '@vue/test-utils'
+import LanguageSwitch from './LanguageSwitch'
+
+const localVue = global.localVue
+
+describe('LanguageSwitch', () => {
+  let wrapper
+
+  const state = {
+    sessionId: 1234,
+    email: 'he@ho.he',
+    language: null,
+  }
+
+  const mocks = {
+    $store: {
+      state,
+      commit: jest.fn(),
+    },
+    $i18n: {
+      locale: 'en',
+    },
+  }
+
+  const Wrapper = () => {
+    return mount(LanguageSwitch, { localVue, mocks })
+  }
+
+  describe('mount', () => {
+    beforeEach(() => {
+      wrapper = Wrapper()
+    })
+
+    it('renders the component', () => {
+      expect(wrapper.find('div.language-switch').exists()).toBeTruthy()
+    })
+
+    describe('with locales en and de', () => {
+      describe('empty store', () => {
+        it('shows English as default navigator langauge', () => {
+          expect(wrapper.find('button.dropdown-toggle').text()).toBe('English - en')
+        })
+
+        describe('navigator language is "de-DE"', () => {
+          const mockNavigator = jest.fn(() => {
+            return 'de'
+          })
+
+          it('shows Deutsch as language ', async () => {
+            wrapper.vm.getNavigatorLanguage = mockNavigator
+            wrapper.vm.setCurrentLanguage()
+            await wrapper.vm.$nextTick()
+            expect(wrapper.find('button.dropdown-toggle').text()).toBe('Deutsch - de')
+          })
+        })
+
+        describe('navigator language is "es-ES" (not supported)', () => {
+          const mockNavigator = jest.fn(() => {
+            return 'es'
+          })
+
+          it('shows English as language ', async () => {
+            wrapper.vm.getNavigatorLanguage = mockNavigator
+            wrapper.vm.setCurrentLanguage()
+            await wrapper.vm.$nextTick()
+            expect(wrapper.find('button.dropdown-toggle').text()).toBe('English - en')
+          })
+        })
+      })
+
+      describe('language "de" in store', () => {
+        it('shows Deutsch as language', async () => {
+          wrapper.vm.$store.state.language = 'de'
+          wrapper.vm.setCurrentLanguage()
+          await wrapper.vm.$nextTick()
+          expect(wrapper.find('button.dropdown-toggle').text()).toBe('Deutsch - de')
+        })
+      })
+
+      describe('dropdown menu', () => {
+        it('has English and German as languages to choose', () => {
+          expect(wrapper.findAll('li')).toHaveLength(2)
+        })
+
+        it('has English as first language to choose', () => {
+          expect(wrapper.findAll('li').at(0).text()).toBe('English')
+        })
+
+        it('has German as second language to choose', () => {
+          expect(wrapper.findAll('li').at(1).text()).toBe('Deutsch')
+        })
+      })
+    })
+  })
+})