\n bei getAllMsg hinzugefügt

.gitignore

@@ -21,3 +21,4 @@
 
 # virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
 hs_err_pid*
+.idea/

RestServer.iml

@@ -7,6 +7,22 @@
     </content>
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" name="junit-4.13.1" level="project" />
+    <orderEntry type="module-library">
+      <library name="JUnit5.4">
+        <CLASSES>
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter/5.4.2/junit-jupiter-5.4.2.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter-api/5.4.2/junit-jupiter-api-5.4.2.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/apiguardian/apiguardian-api/1.0.0/apiguardian-api-1.0.0.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/opentest4j/opentest4j/1.1.1/opentest4j-1.1.1.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/platform/junit-platform-commons/1.4.2/junit-platform-commons-1.4.2.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter-params/5.4.2/junit-jupiter-params-5.4.2.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter-engine/5.4.2/junit-jupiter-engine-5.4.2.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/platform/junit-platform-engine/1.4.2/junit-platform-engine-1.4.2.jar!/" />
+        </CLASSES>
+        <JAVADOC />
+        <SOURCES />
+      </library>
+    </orderEntry>
   </component>
 </module>
-

src/at/reisinger/server/Main.java

@@ -1,27 +1,65 @@
 package at.reisinger.server;
 
-import at.reisinger.server.thread.ClientThread;
+import at.reisinger.server.msg.MsgHandler;
+import at.reisinger.server.objects.Request;
+import at.reisinger.server.objects.Response;
 
 import java.io.IOException;
 import java.net.ServerSocket;
 import java.net.Socket;
 
+/**
+ * Grundlegende Server logic
+ * Vereint alle anderen Klassen
+ */
 public class Main {
     static final int port = 80;
+    private Socket socket;
+    private int id;
+    private MsgHandler msgHandler;
 
+    /**
+     * Initial Start
+     * @param args Nicht Verwendet
+     */
     public static void main(String[] args) {
         System.out.println("Starte Server auf Port 80");
+        new Main(port);
+    }
+
+    /**
+     * Öffnet den Server Socket und akzepiert diesen
+     * @param port Port auf dem der Server läuft
+     */
+    public Main(int port){
         ServerSocket serverSocket = null;
         try {
             serverSocket = new ServerSocket(port);
 
-            int id = 0;
+            this.msgHandler = new MsgHandler();
+            this.id = 0;
             while (true){
-                Socket socket = serverSocket.accept();
-                new ClientThread(id, socket).start();
+                this.socket = serverSocket.accept();
+                requestResponding();
             }
         } catch (IOException e) {
             e.printStackTrace();
         }
     }
+
+    /**
+     * Jeder Request durchläuft diese Funktion, reagiert auf requests
+     */
+    public void requestResponding(){
+        try{
+            System.out.println("Socket von Client #" + this.id + " wurde gestartet!");
+            Request rq = new Request(this.socket, this.id);
+            Response rp = new Response(this.id, rq.getUrl(), rq.getCmd(), rq.getOut(), this.msgHandler, rq.getPayload());
+            this.msgHandler = rp.getMsghandler();
+            this.socket.close();
+            System.out.println("Socket von Client #" + this.id + " wurde geschlossen!");
+        }catch (IOException e){
+            e.printStackTrace();
+        }
+    }
 }

src/at/reisinger/server/msg/MsgHandler.java

@@ -0,0 +1,89 @@
+package at.reisinger.server.msg;
+
+import at.reisinger.server.objects.Msg;
+
+import java.util.HashMap;
+
+/**
+ * Der Speicher der Nachrichten
+ * Mit hilfe einer HashMap werden die MsgId und die Msg selbst gespeichert
+ * @author Georg Reisinger
+ */
+public class MsgHandler {
+    private HashMap<Integer , String> msgHashMap;
+    private int lastID;
+
+    /**
+     * Erstellt den MsgHandler mit standart Test Messages
+     */
+    public MsgHandler(){
+        msgHashMap = new HashMap<Integer, String>();
+        addMsg("Hallo");
+        addMsg("Wie");
+        addMsg("Geht");
+        addMsg("Es");
+        addMsg("Dir?");
+
+    }
+
+    /**
+     * Ermitelt die nächste freie Id
+     * @return Next ID
+     */
+    private int nextId(){
+        return this.lastID + 1;
+    }
+
+    /**
+     * Msg hinzufügen
+     * @param msg Message Text
+     */
+    public int addMsg(String msg){
+        int id = nextId();
+        msgHashMap.put(id, msg);
+        this.lastID = id;
+        return id;
+    }
+
+    /**
+     * Msg löschen
+     * @param id Message Id
+     */
+    public String delMsg(int id){
+        return msgHashMap.remove(id);
+    }
+
+    /**
+     * Msg bearbeiten
+     * @param id Message Id
+     * @param msg Message Text
+     */
+    public String editMsg(int id, String msg){
+        return msgHashMap.replace(id, msg);
+    }
+
+    /**
+     * Msg als Objekt holen
+     * @param id Message Id
+     * @return Message als Msg Objekt
+     */
+    public Msg getMsg(int id){
+        return new Msg(id, msgHashMap.get(id));
+    }
+
+    /**
+     * Alle Nachrichten werden in den Format Key, Value besorgt
+     * bsp: key: 1 value: Nachricht
+     * @return Alle nachrichten in einem String
+     */
+    public String getAllMsg(){
+        String returnStr = "";
+        // Print keys and values
+        for (Integer i : msgHashMap.keySet()) {
+            String item = "key: " + i + " value: " + msgHashMap.get(i) + "\n";
+            returnStr += item;
+        }
+        System.out.println(returnStr);
+        return returnStr;
+    }
+}

src/at/reisinger/server/objects/Msg.java

@@ -0,0 +1,37 @@
+package at.reisinger.server.objects;
+
+/**
+ * Message Objekt beinmhaltet die MsgId und die Msg selbst
+ * @author Georg Reisinger
+ */
+public class Msg {
+    private int id;
+    private String msg;
+
+    /**
+     * Erstellt eine Message
+     */
+    public Msg(int id, String msg){
+        this.id = id;
+        this.msg = msg;
+    }
+
+
+    /**
+     * get field
+     *
+     * @return id Message Id
+     */
+    public int getId() {
+        return this.id;
+    }
+
+    /**
+     * get field
+     *
+     * @return msg Message String
+     */
+    public String getMsg() {
+        return this.msg;
+    }
+}

src/at/reisinger/server/objects/Request.java

@@ -0,0 +1,110 @@
+package at.reisinger.server.objects;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.PrintStream;
+import java.net.Socket;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Verarbeitet einen Request
+ * @author Georg Reisinger
+ */
+public class Request {
+
+    private final Socket socket;
+    private final int          id;
+    private PrintStream out;
+    private String       cmd;
+    private String       url;
+    private final StringBuilder rqBuilder;
+    private String payload;
+
+    /**
+     * Get Request
+     * @param socket Socket von dem der Request kommt
+     * @param id Thread ID
+     */
+    public Request(Socket socket, int id) throws IOException {
+        this.socket = socket;
+        this.rqBuilder = new StringBuilder();
+        this.id = id;
+        this.out = new PrintStream(this.socket.getOutputStream());
+        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
+        String line = bufferedReader.readLine();
+        while (!line.isBlank()) {
+            rqBuilder.append(line + "\r\n");
+            line = bufferedReader.readLine();
+            System.out.println(line);
+        }
+        String request = rqBuilder.toString();
+        String[] requestsLines = request.split("\r\n");
+        String[] requestLine = requestsLines[0].split(" ");
+        String method = requestLine[0];
+        String path = requestLine[1];
+        String version = requestLine[2];
+        String host = requestsLines[1].split(" ")[1];
+
+        //code to read the post payload data
+        StringBuilder payload = new StringBuilder();
+        while(bufferedReader.ready()){
+            payload.append((char) bufferedReader.read());
+        }
+        System.out.println("Payload: " + payload.toString());
+        this.payload = payload.toString();
+
+        this.url = path;
+        this.cmd = method;
+
+        List<String> headers = new ArrayList<>();
+        for (int h = 2; h < requestsLines.length; h++) {
+            String header = requestsLines[h];
+            headers.add(header);
+        }
+
+        String accessLog = String.format("Client %s, method %s, path %s, version %s, host %s, headers %s",
+                socket.toString(), method, path, version, host, headers.toString());
+        System.out.println(accessLog);
+    }
+
+
+
+    /**
+     * Get PrintStream --> Output
+     *
+     * @return out PrintStream --> Output
+     */
+    public PrintStream getOut() {
+        return this.out;
+    }
+
+    /**
+     * Command wie GET, PUT, POST, DEL
+     *
+     * @return cmd als String
+     */
+    public String getCmd() {
+        return this.cmd;
+    }
+
+    /**
+     * Request url
+     *
+     * @return url als String
+     */
+    public String getUrl() {
+        return this.url;
+    }
+
+    /**
+     * Payload des Request
+     *
+     * @return payload als String
+     */
+    public String getPayload() {
+        return this.payload;
+    }
+
+}

src/at/reisinger/server/objects/Response.java

@@ -0,0 +1,140 @@
+package at.reisinger.server.objects;
+
+import at.reisinger.server.msg.MsgHandler;
+
+import java.io.PrintStream;
+import java.net.Socket;
+
+/**
+ * Erstellt und sendet eine Response anhand des Requests
+ * @author Georg Reisinger
+ */
+public class Response {
+
+    //private final Socket socket;
+    private final int          id;
+    private PrintStream out;
+    private String       cmd;
+    private String       url;
+    private MsgHandler msgHandler;
+    private StringBuilder rqBuilder;
+
+    /**
+     * Nimmt die Daten des requests und generiert eine Response
+     * @param id Thread Id
+     * @param url Request Url
+     * @param cmd Request CMD
+     * @param out out Print Stream
+     * @param msgHandler Der MsgHandler
+     * @param payload Payload des Requests
+     */
+    public Response(int id, String url, String cmd, PrintStream out, MsgHandler msgHandler, String payload){
+        this.id = id;
+        this.msgHandler = msgHandler;
+        this.url = url;
+        this.cmd = cmd;
+        this.out = out;
+        this.rqBuilder = new StringBuilder();
+        System.out.println(cmd);
+        if (this.url != null) {
+            if (this.cmd.equals("GET")) {
+                if (this.url.startsWith("/messages")) {
+                    String lastBit = this.url.substring(this.url.lastIndexOf('/') + 1);
+                    System.out.println("Last Bit: " + lastBit);
+                    if(lastBit.equals("messages")){
+                        listAllMsg();
+                    }else{
+                        String message = msgHandler.getMsg(Integer.parseInt(lastBit)).getMsg();
+                        if(message == null){
+                            sendError("404");
+                        }else {
+                            sendResponse(message, "200");
+                        }
+                    }
+                } else if (this.url.startsWith("/")) {
+                    startseite();
+                }
+            }else if (this.cmd.equals("POST")){
+                if (this.url.startsWith("/messages")) {
+                    sendResponse(msgHandler.addMsg(payload) + "", "201");
+                }
+            }else if (this.cmd.equals("PUT")){
+                if (this.url.startsWith("/messages")) {
+                    String lastBit = this.url.substring(this.url.lastIndexOf('/') + 1);
+                    System.out.println("Last Bit: " + lastBit);
+                    System.out.println("Payload" + payload);
+                    String message = msgHandler.editMsg(Integer.parseInt(lastBit), payload);
+                    if(message == null){
+                        sendError("404");
+                    }else {
+                        sendResponse("","200");
+                    }
+                }
+            }else if (this.cmd.equals("DELETE")){
+                if (this.url.startsWith("/messages")) {
+                    String lastBit = this.url.substring(this.url.lastIndexOf('/') + 1);
+                    String message = msgHandler.delMsg(Integer.parseInt(lastBit));
+                    if(message == null){
+                        sendError("404");
+                    }else {
+                        sendResponse("", "200");
+                    }
+                }
+            }else{
+                sendError("405");
+            }
+        }
+    }
+
+
+    /**
+     * Sendet einen Error Response
+     * @param errorCode Der Error Code
+     */
+    private void sendError(String errorCode) {
+        out.print("HTTP/1.0 "+errorCode+"\r\n");
+        out.print("Server: Apache/0.8.4\r\n");
+        out.print("Content-Type: text/plain\r\n");
+        out.print("Content-Length: 1\r\n");
+        out.print("\r\n");
+        //out.print(responseText);
+    }
+
+    private void startseite() {
+        sendResponse("lists all messages:   GET    /messages<br>" +
+                "add message:          POST   /messages     (Payload: the message; Response an id like1)<br>" +
+                "show first message:   GET    /messages/1<br>" +
+                "show third message:   GET    /messages/3<br>" +
+                "update first message: PUT    /messages/1   (Payload: the message)<br>" +
+                "remove first message: DELETE /messages/1<br>", "200");
+    }
+
+    private void listAllMsg() {
+        sendResponse(msgHandler.getAllMsg(), "200");
+        //sendResponse("Test");
+    }
+
+    /**
+     * Sendet eine Response
+     * @param responseText Text der zu senden ist
+     * @param code Http code
+     */
+    private void sendResponse(String responseText, String code){
+        out.print("HTTP/1.0 "+code+"\r\n");
+        out.print("Server: Apache/0.8.4\r\n");
+        out.print("Content-Type: text/plain\r\n");
+        out.print("Content-Length: "+responseText.length()+"\r\n");
+        out.print("\r\n");
+        out.print(responseText);
+    }
+
+    /**
+     * Get Msg Handler
+     *
+     * @return msgHandler Handler der Nachrichten
+     */
+    public MsgHandler getMsghandler() {
+        return this.msgHandler;
+    }
+
+}

src/at/reisinger/server/thread/ClientThread.java

@@ -1,224 +0,0 @@
-package at.reisinger.server.thread;
-
-import java.io.*;
-import java.net.Socket;
-import java.util.ArrayList;
-import java.util.List;
-
-public class ClientThread extends Thread{
-    private final Socket       socket;
-    private final int          id;
-    private PrintStream out;
-    private String       cmd;
-    private String       url;
-    private final StringBuilder rqBuilder;
-
-    /**
-     * Neuer Client wird erstellt
-     * @param id Id des Clients
-     * @param socket Socket des Clients
-     */
-    public ClientThread(int id, Socket socket) {
-        this.id = id;
-        this.socket = socket;
-        this.rqBuilder = new StringBuilder();
-    }
-
-    /**
-     * Hauptmethode des ClientThreads
-     */
-    @Override
-    public void run() {
-        try{
-            System.out.println("Socket von Client #" + this.id + " wurde gestartet!");
-            out = new PrintStream(socket.getOutputStream());
-            InputStream in = socket.getInputStream();
-            getRequest();
-            createResponse();
-            socket.close();
-            System.out.println("Socket von Client #" + this.id + " wurde geschlossen!");
-        }catch (IOException e){
-            e.printStackTrace();
-        }
-
-    }
-
-    /**
-     * Gibt alle Nachrichten aus
-     */
-    private void listAllMsg(){
-        out.print("HTTP/1.0 200 OK\r\n");
-        out.print("Date: Fri, 31 Dec 1999 23:59:59 GMT\r\n");
-        out.print("Server: Apache/0.8.4\r\n");
-        out.print("Content-Type: text/html\r\n");
-        out.print("Content-Length: 59\r\n");
-        out.print("Expires: Sat, 01 Jan 2000 00:59:59 GMT\r\n");
-        out.print("Last-modified: Fri, 09 Aug 1996 14:21:40 GMT\r\n");
-        out.print("\r\n");
-        out.print("<TITLE>GET /messages</TITLE>");
-        out.print("<P>Listet alle Nachrichten</P>");
-    }
-
-    /**
-     * gibt die startseite aus
-     */
-    private void startseite(){
-        out.print("HTTP/1.0 200 OK\r\n");
-        out.print("Date: Fri, 31 Dec 1999 23:59:59 GMT\r\n");
-        out.print("Server: Apache/0.8.4\r\n");
-        out.print("Content-Type: text/html\r\n");
-        out.print("Content-Length: 59\r\n");
-        out.print("Expires: Sat, 01 Jan 2000 00:59:59 GMT\r\n");
-        out.print("Last-modified: Fri, 09 Aug 1996 14:21:40 GMT\r\n");
-        out.print("\r\n");
-        out.print("<TITLE>Startseite</TITLE>");
-        out.print("<p>lists all messages:   GET    /messages</p>" +
-                "<p>add message:          POST   /messages     (Payload: the message; Response an id like 1)</p>" +
-                "<p>show first message:   GET    /messages/1</p> " +
-                "<p>show third message:   GET    /messages/3</p>" +
-                "<p>update first message: PUT    /messages/1   (Payload: the message)</p>" +
-                "<p>remove first message: DELETE /messages/1</p>");
-    }
-
-    /**
-     * Erstellt eine Respone Message anhand des gegebenen Requests
-     */
-    private void createResponse() {
-        if (this.url != null) {
-            if (this.cmd.equals("GET")) {
-                if (this.url.startsWith("/messages")) {
-                    String lastBit = this.url.substring(this.url.lastIndexOf('/') + 1);
-                    System.out.println("Last Bit: " + lastBit);
-                    if(lastBit.equals("messages")){
-                        listAllMsg();
-                    }else{
-                        getMsg(Integer.parseInt(lastBit));
-                    }
-                } else if (this.url.startsWith("/")) {
-                    startseite();
-                }
-            }else if (this.cmd.equals("POST")){
-                if (this.url.startsWith("/messages")) {
-                    addMsg(id);
-                }
-            }else if (this.cmd.equals("PUT")){
-                if (this.url.startsWith("/messages")) {
-                    editMsg(id);
-                }
-            }else if (this.cmd.equals("DELETE")){
-                if (this.url.startsWith("/messages")) {
-                    delMsg(id);
-                }
-            }else{
-                sendError();
-            }
-        }
-    }
-
-    /**
-     * Holt eine Nachricht
-     * @param id ID der nachricht die geholt werden soll
-     */
-    private void getMsg(int id) {
-        out.print("HTTP/1.0 200 OK\r\n");
-        out.print("Date: Fri, 31 Dec 1999 23:59:59 GMT\r\n");
-        out.print("Server: Apache/0.8.4\r\n");
-        out.print("Content-Type: text/html\r\n");
-        out.print("Content-Length: 59\r\n");
-        out.print("Expires: Sat, 01 Jan 2000 00:59:59 GMT\r\n");
-        out.print("Last-modified: Fri, 09 Aug 1996 14:21:40 GMT\r\n");
-        out.print("\r\n");
-        out.print("<TITLE>Get MSG</TITLE>");
-        out.print("<p> Aktuelle MSG Number: " + id + "</p>");
-    }
-
-    /**
-     * sendet eine Fehlermeldung zurück
-     */
-    private void sendError() {
-        out.print("HTTP/1.0 500 ERR\r\n");
-    }
-
-    /**
-     * Löscht eine Nachricht
-     * @param id Nachricht die zu löschen ist
-     */
-    private void delMsg(int id) {
-        out.print("HTTP/1.0 200 OK\r\n");
-        out.print("Date: Fri, 31 Dec 1999 23:59:59 GMT\r\n");
-        out.print("Server: Apache/0.8.4\r\n");
-        out.print("Content-Type: text/html\r\n");
-        out.print("Content-Length: 59\r\n");
-        out.print("Expires: Sat, 01 Jan 2000 00:59:59 GMT\r\n");
-        out.print("Last-modified: Fri, 09 Aug 1996 14:21:40 GMT\r\n");
-        out.print("\r\n");
-        out.print("<TITLE>Del MSG</TITLE>");
-        out.print("<p> Aktuelle MSG Number: " + id + "</p>");
-    }
-
-    /**
-     * Bearbeitet eine Nachricht
-     * @param id Nachricht die zu bearbeiten ist
-     */
-    private void editMsg(int id) {
-        out.print("HTTP/1.0 200 OK\r\n");
-        out.print("Date: Fri, 31 Dec 1999 23:59:59 GMT\r\n");
-        out.print("Server: Apache/0.8.4\r\n");
-        out.print("Content-Type: text/html\r\n");
-        out.print("Content-Length: 59\r\n");
-        out.print("Expires: Sat, 01 Jan 2000 00:59:59 GMT\r\n");
-        out.print("Last-modified: Fri, 09 Aug 1996 14:21:40 GMT\r\n");
-        out.print("\r\n");
-        out.print("<TITLE>Edit MSG</TITLE>");
-        out.print("<p> Aktuelle MSG Number: " + id + "</p>");
-    }
-
-    /**
-     * Fügt eine Nachricht hinzu
-     * @param id Id der neuen Nachricht
-     */
-    private void addMsg(int id) {
-        out.print("HTTP/1.0 200 OK\r\n");
-        out.print("Date: Fri, 31 Dec 1999 23:59:59 GMT\r\n");
-        out.print("Server: Apache/0.8.4\r\n");
-        out.print("Content-Type: text/html\r\n");
-        out.print("Content-Length: 59\r\n");
-        out.print("Expires: Sat, 01 Jan 2000 00:59:59 GMT\r\n");
-        out.print("Last-modified: Fri, 09 Aug 1996 14:21:40 GMT\r\n");
-        out.print("\r\n");
-        out.print("<TITLE>Add MSG</TITLE>");
-        out.print("<p> Aktuelle MSG Number: " + id + "</p>");
-    }
-
-    /**
-     * Holt den HTTP Request
-     */
-    private void getRequest() throws IOException {
-        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
-        String line;
-        while (!(line = bufferedReader.readLine()).isBlank()) {
-            rqBuilder.append(line + "\r\n");
-        }
-        String request = rqBuilder.toString();
-        String[] requestsLines = request.split("\r\n");
-        String[] requestLine = requestsLines[0].split(" ");
-        String method = requestLine[0];
-        String path = requestLine[1];
-        String version = requestLine[2];
-        String host = requestsLines[1].split(" ")[1];
-
-        this.url = path;
-        this.cmd = method;
-
-        List<String> headers = new ArrayList<>();
-        for (int h = 2; h < requestsLines.length; h++) {
-            String header = requestsLines[h];
-            headers.add(header);
-        }
-
-        String accessLog = String.format("Client %s, method %s, path %s, version %s, host %s, headers %s",
-                socket.toString(), method, path, version, host, headers.toString());
-        System.out.println(accessLog);
-
-    }
-}

src/test/MyTests.java

@@ -0,0 +1,57 @@
+package test;
+
+import at.reisinger.server.msg.MsgHandler;
+import at.reisinger.server.objects.Msg;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.Assert.assertTrue;
+
+public class MyTests{
+    @Test
+    @DisplayName("Msg - GetMsg")
+    public void msgTest(){
+        Msg msg = new Msg(1, "Nachricht");
+        assertTrue(msg.getMsg().equals("Nachricht"));
+    }
+
+    @Test
+    @DisplayName("Msg - getId")
+    public void msgIdTest(){
+        Msg msg = new Msg(1, "Nachricht");
+        assertTrue(msg.getId() == 1);
+    }
+
+    @Test
+    @DisplayName("MsgHandler - GetMsg")
+    public void msgHandlerGetTest(){
+        MsgHandler msgHandler = new MsgHandler();
+        assertTrue(msgHandler.getMsg(5).getMsg().equals("Dir?"));
+    }
+
+    @Test
+    @DisplayName("MsgHandler - AddMsg")
+    public void msgHandlerAddTest(){
+        MsgHandler msgHandler = new MsgHandler();
+        msgHandler.addMsg("Nachricht"); //id = 6
+        assertTrue(msgHandler.getMsg(6).getMsg().equals("Nachricht"));
+    }
+
+    @Test
+    @DisplayName("MsgHandler - editMsg")
+    public void msgHandlerEditTest(){
+        MsgHandler msgHandler = new MsgHandler();
+        msgHandler.addMsg("Nachricht"); //id = 6
+        msgHandler.editMsg(6, "Neu");
+        assertTrue(msgHandler.getMsg(6).getMsg().equals("Neu"));
+    }
+
+    @Test
+    @DisplayName("MsgHandler - DelMsg")
+    public void msgHandlerDelTest(){
+        MsgHandler msgHandler = new MsgHandler();
+        msgHandler.addMsg("Nachricht"); //id = 6
+        msgHandler.delMsg(6);
+        assertTrue(msgHandler.getMsg(6).getMsg() == null);
+    }
+}