add tests for i18n and getUserLanguage

test/api/v3/unit/middlewares/getUserLanguage.test.js

@@ -0,0 +1,89 @@
+import {
+  generateRes,
+  generateReq,
+  generateNext,
+} from '../../../../helpers/api-unit.helper';
+import getUserLanguage from '../../../../../website/src/middlewares/api-v3/getUserLanguage';
+import Q from 'q';
+import { model as User } from '../../../../../website/src/models/user';
+import { translations } from '../../../../../website/src/libs/api-v3/i18n';
+import accepts from 'accepts';
+
+describe('getUserLanguage', () => {
+  let res, req, next;
+
+  beforeEach(() => {
+    res = generateRes();
+    req = generateReq();
+    next = generateNext();
+
+    sandbox.stub(User, 'findOne').returns({
+      exec() {
+        return Q.resolve({
+          preferences: {
+            language: 'it',
+          }
+        });
+      }
+    });
+  });
+
+  describe('query parameter', () => {
+    it('uses the language in the query parameter if avalaible', () => {
+      req.query = {
+        lang: 'es',
+      };
+
+      getUserLanguage(req, res, next);
+      expect(req.language).to.equal('es');
+    });
+
+    it('falls back to english if the query parameter language does not exists', () => {
+      req.query = {
+        lang: 'bla',
+      };
+
+      getUserLanguage(req, res, next);
+      expect(req.language).to.equal('en');
+    });
+  });
+
+  describe('authorized request', () => {
+    it('uses the user preferred language if avalaible', () => {
+      req.locals = {
+        user: {
+          preferences: {
+            language: 'it',
+          },
+        },
+      };
+
+      getUserLanguage(req, res, next);
+      expect(req.language).to.equal('it');
+    });
+
+    xit('falls back to english if the user preferred language is not avalaible', () => {
+      req.locals = {
+        user: {
+          preferences: {
+            language: 'bla',
+          },
+        },
+      };
+
+      getUserLanguage(req, res, next);
+      expect(req.language).to.equal('en');
+    });
+  });
+
+  describe('request with session', () => {
+    it('uses the user preferred language if avalaible', () => {
+      req.session = {
+        userId: 123
+      };
+
+      getUserLanguage(req, res, next);
+      expect(req.language).to.equal('it');
+    });
+  });
+});