### Question:
UserManager { public int getUserCount() { return provider.getUserCount(); } private  UserManager();   UserManager(final XMPPServer xmppServer); @SuppressWarnings("AccessStaticViaInstance") static UserProvider getUserProvider(); @SuppressWarnings("AccessStaticViaInstance") static UserPropertyProvider getUserPropertyProvider(); static UserManager getInstance(); User createUser(String username, final String password, final String name, final String email); void deleteUser(final User user); User getUser(String username); int getUserCount(); Collection<User> getUsers(); Collection<String> getUsernames(); Collection<User> getUsers(final int startIndex, final int numResults); Set<String> getSearchFields(); Collection<User> findUsers(final Set<String> fields, final String query); Collection<User> findUsers(final Set<String> fields, final String query, final int startIndex,
                                      final int numResults); boolean isRegisteredUser(final String username); boolean isRegisteredUser(final JID user); static void setProvider(UserProvider provider); void clearCaches(); static final SystemProperty<Class> USER_PROVIDER; static final SystemProperty<Class> USER_PROPERTY_PROVIDER; }### Answer:
@Test public void verifyUserCountIsTwo() throws Exception{ final int result = userManager.getUserCount(); assertThat(result, is(2)); }