Added: Remove a registered user + Basic Test

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

@@ -17,6 +17,10 @@ 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);
 	}

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

@@ -88,4 +88,22 @@ 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);
+		
+	}
+
 }