REST endpoint testing software in java 8

The code has to call the following endpoint, and handle all the data from the response: https://jsonplaceholder.typicode.com/users

Requirements:

1. Store the users and the data connected to them in a database
   
2. Check if it was a successful http call, and you get back the response correctly (same count of users every time and 200 OK http status)
   
3. Create a log file automatically which contains the details of the api calls and the response statuses.
   
4. Validate all the user emails ([email protected])
   

Comments:

1. Unit tests are added to check the http calls (see TypicodeServiceTest::fetchUsers):

    int firstCount = -1;
    for (int i = 0; i < 10; i++) {
      ResponseEntity<List<User>> users = typicodeService.fetchUsers();
      
      if (firstCount == -1) {
        firstCount = users.getBody().size();
      } else {
        assertEquals(firstCount,users.getBody().size());
      }

      assertEquals(200, users.getStatusCodeValue());
    }

2. After running the application, a "log.txt" file is automatically created for logs, with requests and responses details.
   
3. Unit tests are added to validate all the users emails (see TypicodeServiceTest::usersEmails).