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quiz-game-part-09.md

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Quiz Game - Part 09

In this exercise, we will add Selenium tests for the web application. We are going to use local drivers, and not Docker yet. Therefore, you need to install Chrome and Chrome Driver on your machine.

In the pom.xml file, add the following dependency:

  • org.seleniumhq.selenium:selenium-java

For each of the three existing pages (i.e., index.xhtml, match.xhtml and result.xhtml), write a Page Object (e.g., IndexPO, MatchPO and ResultPO). You can/should reuse code (e.g., copy&paste) from the org.tsdes.misc:test-utils module.

Create a SeleniumLocalIT test class with the following Selenium tests:

  • testNewMatch(): from home page, click the new match button, and verify you can see the category selection.

  • testFirstQuiz(): from home page, click the new match button. On the match page, select a category. Verify that a quiz is displayed, and that the categories are no longer displayed.

  • testWrongAnswer(): start a new match (click on the new match button and then choose a category). At the first quiz, answer it wrongly. Verify that you can see the "lost" message and not the "win" one.

  • testWinAMatch(): start a new match (click on the new match button and then choose a category). Correctly answer the 5 quizzes in the match. At each answer, do verify that the current displayed quiz counter increases by 1 (i.e., from 1 to 5). Once match is over, do verify that you can see the "win" message and not the "lost" one.

When you write these tests, you will need to take the following into account:

  • You might need to change the xhtml files by adding for example id attributes and prependId="false" in the forms.

  • To avoid dependencies among tests, you will need to reset the cookies (in particular the session one) before running each test. You can do that by calling driver.manage().deleteAllCookies().

  • When a quiz is displayed, it will be chosen at random. Therefore, beforehand you will not be able to know which is the correct answer. Testing non-deterministic software is challenging. However, in this particular case, a reasonable approach is to inject a QuizService in your tests, and then query the database directly every time you need to know which is the right answer for the currently displayed quiz.

To your pom.xml file, add the jacoco and failsafe plugins. When you execute mvn verify from command line, not only all the tests should be run (including the Selenium ones), but you should also get a test coverage report at target/site/jacoco-it/index.html.

Note: if for any reason you are overriding the <argLine> settings of the surefire/failsafe plugins, then you MUST add the JaCoCo plugin in the pom.xml file before them, and you MUST add ${argLine} inside your overridden <argLine>, for example <argLine> ${argLine} your_changes </argLine>.

Solutions to this exercise can be found in the intro/exercise-solutions/quiz-game/part-09 module.

Note: to avoid copy&paste of the same code, the solution for part-09 does use the code of part-08 and test-utils as libraries. If you use files from test-utils (which you can just copy&paste), then make sure to have them under src/test/java instead of src/main/java (as test-utils is imported with test scope).

Also notice that, when you run mvn verify on this module, you will not get coverage results, as all the classes are in part-08, which is treated as an external library.