Añadidos apartados para todos los tipos de tests

docs/src/12_testing.adoc

@@ -4,6 +4,14 @@ ifndef::imagesdir[:imagesdir: ../images]
 
 This section details the results of the various types of tests that have been carried out with the application.
 
+== Unit Testing
+
+We used Jest to perform unit testing on the application. We have written tests for all the components of the application, mocking the database and external services. The results of the tests are shown below:
+
+== Code coverage
+
+We used sonarCloud to check the code coverage of the application. The results are shown below:
+
 === Load Testing
 We used Gatling to perform load testing on the application. It consisted of simulating 1000 users accessing the application at the same time, each of one performing 83 requests. The results of the test are shown below: