Added: Count Registered Users and Test

projjpn/src/main/java/de/hs_fulda/ciip/projjpn/Customers.java

@@ -17,7 +17,15 @@ public class Customers {
 		return pool.putIfAbsent(user.nickName, user);
 	}
 	
+	public User deleteUser(String userNickname) {
+		return pool.remove(userNickname);
+	}
+	
 	public User getByNickname(String nickname) {
 		return pool.get(nickname);
 	}
+	
+	public int getCountOfUsers() {
+		return pool.size();
+	}
 }

projjpn/src/test/java/de/hs_fulda/ciip/projjpn/CustomersTest.java

@@ -16,6 +16,22 @@ public class CustomersTest extends TestCase {
 		assertTrue(nicknameIsAvailable);
 	}
 	
+	public void test_nicknameIsTaken() {
+		// Given
+		Customers customers = new Customers();
+		String availableNickname = "beastMaster64";
+		String takenNickname = "beastMaster64";
+		User userToRegister = new User(availableNickname);
+		
+		customers.registerUser(userToRegister);
+		
+		// When
+		boolean nicknameIsTaken = !customers.nickNameAvailable(availableNickname);
+		
+		// Then
+		assertTrue(nicknameIsTaken);
+	}
+	
 	public void test_registerSingleUser() {
 		// Given
 		Customers customers = new Customers();
@@ -72,4 +88,39 @@ public class CustomersTest extends TestCase {
 			assertTrue(userRegistered);
 		}
 	}
+
+	public void test_removeRegisteredUser() {
+		// Given
+		Customers customers = new Customers();
+		String userToRemove = "beastMaster64";
+		User userToRegister = new User("beastMaster64");
+		customers.registerUser(userToRegister);
+		
+		// When
+		boolean userExists = !customers.nickNameAvailable(userToRemove);
+		assertTrue(userExists);
+		
+		// Then
+		User removedUser = customers.deleteUser(userToRemove);
+		assertEquals(userToRemove, removedUser.nickName);
+		
+	}
+	
+	public void test_registerAndCountUsers() {
+		// Given
+		Customers customers = new Customers();
+		int expectedRegisteredUsers = 20;
+		int actualRegisteredUsers = -1;
+		String nickname;
+		
+		// Prepare
+		for(int i = 0, j = 1; i < expectedRegisteredUsers; i++, j++) {
+			nickname = "beastMaster_" + j;
+			customers.registerUser(new User(nickname));
+		}
+		actualRegisteredUsers = customers.getCountOfUsers();
+		assertEquals(expectedRegisteredUsers, actualRegisteredUsers);
+		
+	}
+
 }