@Before
 public void setup() {
   pacemaker = new PacemakerAPI();
   for (User user : users) {
     pacemaker.createUser(user.firstName, user.lastName, user.email, user.password);
   }
 }
 @Test
 public void testUser() {
   assertEquals(users.length, pacemaker.getUsers().size());
   pacemaker.createUser("homer", "simpson", "*****@*****.**", "secret");
   assertEquals(users.length + 1, pacemaker.getUsers().size());
   assertEquals(users[0], pacemaker.getUserByEmail(users[0].email));
 }
  void populate(PacemakerAPI pacemaker) {
    for (User user : users) {
      pacemaker.createUser(user.firstName, user.lastName, user.email, user.password);
    }
    User user1 = pacemaker.getUserByEmail(users[0].email);
    Activity activity =
        pacemaker.createActivity(
            user1.id, activities[0].type, activities[0].location, activities[0].distance);
    pacemaker.createActivity(
        user1.id, activities[1].type, activities[1].location, activities[1].distance);
    User user2 = pacemaker.getUserByEmail(users[1].email);
    pacemaker.createActivity(
        user2.id, activities[2].type, activities[2].location, activities[2].distance);
    pacemaker.createActivity(
        user2.id, activities[3].type, activities[3].location, activities[3].distance);

    for (Location location : locations) {
      pacemaker.addLocation(activity.id, location.latitude, location.longitude);
    }
  }