test(site/change-lang): integration tests for switching the language

Fix #214

Author: mukeshk

src/main/webapp/WEB-INF/views/site/index.html

@@ -25,7 +25,7 @@
 						th:with="lang=${#locale.language == 'en' ? 'ru' : 'en'},langName=${#locale.language == 'en' ? 'Русский' : 'English'}">
 					<span class="lang-xs" lang="ru"
 						th:lang="${lang}"></span>
-					<a href="javascript:void(0)" hreflang="ru"
+					<a id="change-lang-link" href="javascript:void(0)" hreflang="ru"
 						th:href="|?lang=${lang}|" th:hreflang="${lang}" th:text="${langName}">Русский</a>
 				</div><!--
 				

src/test/robotframework/site/change-lang/logic.robot

@@ -0,0 +1,17 @@
+*** Settings ***
+Documentation   Verify change language scenario
+Library         SeleniumLibrary
+Suite Setup     Before Test Suite
+Suite Teardown  Close Browser
+Force Tags      main-page  lang  logic
+
+*** Test Cases ***
+Language should be changed after switching language
+	Element Text Should Be  id=logo  My stamps
+	Click Link              id=change-lang-link
+	Element Text Should Be  id=logo  Мои марки
+
+*** Keywords ***
+Before Test Suite
+	Open Browser                        ${SITE_URL}/  ${BROWSER}
+	Register Keyword To Run On Failure  Log Source