Add unit tests for translation

test/i18n-test/languageHandler-test.js

@@ -0,0 +1,60 @@
+const React = require('react');
+const expect = require('expect');
+import * as languageHandler from '../../src/languageHandler';
+
+const testUtils = require('../test-utils');
+
+describe('languageHandler', function() {
+    let sandbox;
+
+    beforeEach(function(done) {
+        testUtils.beforeEach(this);
+        sandbox = testUtils.stubClient();
+
+        languageHandler.setLanguage('en').done(done);
+    });
+
+    afterEach(function() {
+        sandbox.restore();
+    });
+
+    it('translates a string to german', function() {
+        languageHandler.setLanguage('de').then(function() {
+            const translated = languageHandler._t('Rooms');
+            expect(translated).toBe('Räume');
+        });
+    });
+
+    it('handles plurals', function() {
+        var text = 'and %(count)s others...';
+        expect(languageHandler._t(text, { count: 1 })).toBe('and one other...');
+        expect(languageHandler._t(text, { count: 2 })).toBe('and 2 others...');
+    });
+
+    it('handles simple variable subsitutions', function() {
+        var text = 'You are now ignoring %(userId)s';
+        expect(languageHandler._t(text, { userId: 'foo' })).toBe('You are now ignoring foo');
+    });
+
+    it('handles simple tag substitution', function() {
+        var text = 'Press <StartChatButton> to start a chat with someone';
+        expect(languageHandler._t(text, {}, { 'StartChatButton': () => 'foo' })).toBe('Press foo to start a chat with someone');
+    });
+
+    it('handles text in tags', function() {
+        var text = '<a>Click here</a> to join the discussion!';
+        expect(languageHandler._t(text, {}, { 'a': (sub) => `x${sub}x` })).toBe('xClick herex to join the discussion!');
+    });
+
+    it('variable substitution with React component', function() {
+        // Need an extra space at the end because the result of _t() has an extra empty node at the end
+        var text = 'You are now ignoring %(userId)s ';
+        expect(JSON.stringify(languageHandler._t(text, { userId: () => <i>foo</i> }))).toBe(JSON.stringify((<span>You are now ignoring <i>foo</i> </span>)));
+    });
+
+    it('tag substitution with React component', function() {
+        var text = 'Press <StartChatButton> to start a chat with someone';
+        expect(JSON.stringify(languageHandler._t(text, {}, { 'StartChatButton': () => <i>foo</i> }))).toBe(JSON.stringify(<span>Press <i>foo</i> to start a chat with someone</span>));
+
+    });
+});