Merge branch 'sign_in_up_out'

pom.xml

@@ -28,6 +28,11 @@
             <artifactId>json</artifactId>
             <version>20210307</version>
         </dependency>
+        <dependency>
+            <groupId>commons-codec</groupId>
+            <artifactId>commons-codec</artifactId>
+            <version>1.17.0</version>
+        </dependency>
     </dependencies>
     <build>
         <resources>

src/main/java/de/hs_mannheim/domain/System.java

@@ -1,68 +1,246 @@
 package de.hs_mannheim.domain;
 
-import java.io.BufferedReader;
-import java.io.InputStream;
-import java.io.InputStreamReader;
+import java.io.*;
 import java.net.URI;
 import java.net.http.HttpClient;
 import java.net.http.HttpRequest;
 import java.net.http.HttpResponse;
 import java.net.http.HttpResponse.BodyHandlers;
 import java.util.ArrayList;
-import java.util.HashSet;
 import java.util.TreeSet;
 
+import org.apache.commons.codec.binary.Base64;
 import org.json.JSONObject;
 
 public class System {
 
     private User current_user = new User();
+    private ArrayList<User> all_user = new ArrayList<>();
     private String api_key;
     private ArrayList<String> distances = new ArrayList<>();
 
     public System(String api_key) {
         this.api_key = api_key;
+        get_all_user();
     }
 
-    public void set_current_user_zip(String zip){
+    public void set_current_user_zip(String zip) {
         this.current_user.setZip(Integer.parseInt(zip));
     }
 
-    public void set_current_user_car_l_100km(double car_l_100km){
+    public void set_current_user_car_l_100km(double car_l_100km) {
         this.current_user.setCar_l_100km(car_l_100km);
     }
 
-    public void set_current_user_car_avg_kmh(double car_avg_kmh){
+    public void set_current_user_car_avg_kmh(double car_avg_kmh) {
         this.current_user.setCar_avg_kmh(car_avg_kmh);
     }
 
-    public void set_current_user_bike_avg_kmh(double bike_avg_kmh){
+    public void set_current_user_bike_avg_kmh(double bike_avg_kmh) {
         this.current_user.setBike_avg_kmh(bike_avg_kmh);
     }
 
-    public HashSet<User> get_all_user(){
-        return new HashSet<User>();
+    public static String decoding(String string) {
+        byte[] binary_data = new byte[string.length()];
+        for(int i = 0; i < string.length(); i++) {
+            binary_data[i] = (byte)string.charAt(i);
+        }
+        return new String(Base64.decodeBase64(binary_data));
     }
 
-    public boolean sign_in_user(String username, String password){
+    public static String encoding(String string) {
+        byte[] binary_data = new byte[string.length()];
+        for (int i = 0; i < string.length(); i++) {
+            binary_data[i] = (byte) string.charAt(i);
+        }
+        return Base64.encodeBase64String(binary_data);
+    }
+
+    public static int parseInt(String s) throws NumberFormatException{
+        if(s.equals(""))
+            return 0;
+        else
+            return Integer.parseInt(s);
+    }
+
+    public static double parseDouble(String s) throws NumberFormatException {
+        if(s.equals(""))
+            return 0;
+        else
+            return Double.parseDouble(s);
+    }
+    
+    public void get_all_user() {
+        String[] fileString = new String[8];
+
+        InputStream inputStream = System.class.getResourceAsStream("/user_data.csv");
+        String path;
+
+        try (BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream))) {
+            while ((path = reader.readLine()) != null) {
+                fileString = path.split(";");
+                fileString[1] = decoding(fileString[1]);
+                this.all_user.add(new User(fileString[0], fileString[1], fileString[2],
+                        Integer.parseInt(fileString[3]), fileString[4],
+                        Double.parseDouble(fileString[5]),
+                        Double.parseDouble(fileString[6]),
+                        Double.parseDouble(fileString[7])));
+            }
+        } catch (Exception e) {
+        }
+    }
+
+    public ArrayList<String> all_user_toString(){
+
+        ArrayList<String> result = new ArrayList<>();
+
+        for(User user : this.all_user){
+            result.add(user.toString());
+        }
+
+        return result;
+    }
+    
+    public boolean sign_in_user(String username, String password) {
+
+        for (User user : this.all_user) {
+            if (user.getUsername().equals(username) && user.getPassword().equals(password)) {
+                current_user = new User(user.getUsername(), user.getPassword(),
+                        user.getHometown(), user.getZip(), user.getCar_name(),
+                        user.getCar_l_100km(), user.getCar_avg_kmh(), user.getBike_avg_kmh());
+                return true;
+            }
+        }
+        return false;
+    }
+
+    public boolean sign_up_user(String username, String password, String hometown, String zipS,
+                                String car_name, String car_l_100kmS, String car_avg_kmhS, String bike_avg_kmhS){
+
+        int zip;
+        double car_l_100km;
+        double car_avg_kmh;
+        double bike_avg_kmh;
+    
+        try{
+            zip = parseInt(zipS);
+            car_l_100km = parseDouble(car_l_100kmS);
+            car_avg_kmh = parseDouble(car_avg_kmhS);
+            bike_avg_kmh = parseDouble(bike_avg_kmhS);
+        } catch (NumberFormatException n){
+            return false;
+        }
+
+        if(username.equals("")||password.equals("")||hometown.equals("")||zipS.equals(""))
+            return false;
+
+        for(User user: this.all_user)
+            if(user.getUsername().equals(username))
+                return false;
+
+        ArrayList<String> mem = search(zipS);
+        boolean bool = false;
+
+        for (String line: mem)
+            if(line.split(";")[1].equals(hometown)) {
+                bool = true;
+                break;
+            }
+
+        if(!bool)
+            return false;
+
+        current_user = new User(username, password, hometown, zip, car_name, car_l_100km, car_avg_kmh, bike_avg_kmh);
+        
+        this.all_user.add(current_user);
+
+        write_to_file(all_user_toString(), "src/main/resources/user_data.csv");
+        write_to_file(all_user_toString(), "src/test/resources/user_data.csv");
+
         return true;
     }
     
-    public boolean sign_up_user(String username, String password, String hometown, int zip, 
-                                String car_name, double car_co2_km, double car_avg_kmh, double bike_avg_kmh){
-        return true;
+    public boolean change_user_details(String username, String password, String hometown, String zipS, 
+                                    String car_name, String car_l_100kmS, String car_avg_kmhS, String bike_avg_kmhS){
+        
+        int zip;
+        double car_l_100km;
+        double car_avg_kmh;
+        double bike_avg_kmh;
+        
+        try{
+            zip = parseInt(zipS);
+            car_l_100km = parseDouble(car_l_100kmS);
+            car_avg_kmh = parseDouble(car_avg_kmhS);
+            bike_avg_kmh = parseDouble(bike_avg_kmhS);
+        } catch (NumberFormatException n){
+            return false;
         }
         
-    public void sign_out_user(){
+        if(username.equals("")||password.equals("")||hometown.equals("")||zipS.equals(""))
+            return false;
+        
+        for(User user: this.all_user)
+        if(user.getUsername().equals(username))
+            return false;
+
+        ArrayList<String> mem = search(zipS);
+        boolean bool = false;
+
+        for (String line: mem)
+            if(line.split(";")[1].equals(hometown)) {
+                bool = true;
+                break;
+        }
+
+        if(!bool)
+            return false;
+        
+        
+        for(int i = 0; i< this.all_user.size(); i++)
+            if(this.all_user.get(i).getUsername().equals(current_user.getUsername()))
+                this.all_user.remove(i);
+        
+        write_to_file(all_user_toString(), "src/main/resources/user_data.csv");
+        write_to_file(all_user_toString(), "src/test/resources/user_data.csv");
+        
+        this.current_user = new User(username, password, hometown, zip, car_name, car_l_100km, car_avg_kmh, bike_avg_kmh);
+        this.all_user.add(current_user);
+
+        write_to_file(all_user_toString(), "src/main/resources/user_data.csv");
+        write_to_file(all_user_toString(), "src/test/resources/user_data.csv");
+
+        return true;
+
+    }
+    
+    public void write_to_file(ArrayList<String> lines, String file) {
+        try (BufferedWriter writer = new BufferedWriter(new FileWriter(file))) {
+            for (int i = 0; i < lines.size() - 1; i++) {
+                writer.write(lines.get(i));
+                writer.newLine();
+            }
+            writer.write(lines.getLast());
+        } catch (IOException e) {}
+    }
+
+    public void sign_out_user() {
         this.distances = new ArrayList<>();
+
+        current_user = new User();
     }
 
-    public boolean change_user_details(String username, String password, String hometown, int zip, 
-                                String car_name, double car_co2_km, double car_avg_kmh, double bike_avg_kmh){
-        return true;
+    public String[] getDetails(){
+        return new String[]{current_user.getUsername(), current_user.getPassword(),
+                current_user.getHometown(), 
+                current_user.getZip()==0?"":String.valueOf(current_user.getZip()),
+                current_user.getCar_name(), 
+                current_user.getCar_l_100km()==0?"":String.valueOf(current_user.getCar_l_100km()),
+                current_user.getCar_avg_kmh()==0?"":String.valueOf(current_user.getCar_avg_kmh()), 
+                current_user.getBike_avg_kmh()==0?"":String.valueOf(current_user.getBike_avg_kmh())};
     }
 
-    public ArrayList<String> search(String hometown_or_zip){
+    public ArrayList<String> search(String hometown_or_zip) {
 
         TreeSet<String> zip_set = new TreeSet<>();
 
@@ -70,54 +248,55 @@ public class System {
 
         try (BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream))) {
             String line;
-            while ((line = reader.readLine()) != null && zip_set.size()<200) {
-                if(line.contains(hometown_or_zip)){
+            while ((line = reader.readLine()) != null && zip_set.size() < 200) {
+                if (line.contains(hometown_or_zip)) {
                     line = line.replace("\"", "");
                     zip_set.add(line);
                 }
             }
-        } catch (Exception e) {}
+        } catch (Exception e) {
+        }
 
         return new ArrayList<>(zip_set);
     }
 
-    public ArrayList<String> random_destinations_car(){
+    public ArrayList<String> random_destinations_car() {
 
         calc_all_distances();
 
         ArrayList<String> mem = new ArrayList<>();
         ArrayList<String> result = new ArrayList<>();
 
-        for(int i = 0; i<this.distances.size(); i++){
-            if(Double.parseDouble(this.distances.get(i).split(";")[2])>150)
+        for (int i = 0; i < this.distances.size(); i++) {
+            if (Double.parseDouble(this.distances.get(i).split(";")[2]) > 150)
                 mem.add(this.distances.get(i));
         }
 
-        for(int i = 0; i<3; i++)
-            result.add(mem.get((int) (Math.random()*mem.size())));
+        for (int i = 0; i < 3; i++)
+            result.add(mem.get((int) (Math.random() * mem.size())));
 
         return result;
     }
 
-    public ArrayList<String> random_destinations_bike(){
+    public ArrayList<String> random_destinations_bike() {
 
         calc_all_distances();
 
         ArrayList<String> mem = new ArrayList<>();
         ArrayList<String> result = new ArrayList<>();
 
-        for(int i = 0; i<this.distances.size(); i++){
-            if(Double.parseDouble(this.distances.get(i).split(";")[2])<100)
+        for (int i = 0; i < this.distances.size(); i++) {
+            if (Double.parseDouble(this.distances.get(i).split(";")[2]) < 100)
                 mem.add(this.distances.get(i));
         }
 
-        for(int i = 0; i<3; i++)
-            result.add(mem.get((int) (Math.random()*mem.size())));
+        for (int i = 0; i < 3; i++)
+            result.add(mem.get((int) (Math.random() * mem.size())));
 
         return result;
     }
 
-    public String[] destination_details(String destination_zip){
+    public String[] destination_details(String destination_zip) {
         String[] result = new String[5];
 
         result[0] = distance(destination_zip); // Entfernung
@@ -129,34 +308,35 @@ public class System {
         return result;
     }
 
-    public String current_weather(){
+    public String current_weather() {
 
         String weather = "";
         double temperature = 1;
 
-        try{
+        try {
             HttpClient http_client = HttpClient.newHttpClient();
 
             HttpRequest get_request = HttpRequest.newBuilder()
-                                            .uri(new URI("https://api.openweathermap.org/data/2.5/weather?zip="+current_user.getZip()+",de&appid="+api_key+"&units=metric&lang=de"))
+                    .uri(new URI("https://api.openweathermap.org/data/2.5/weather?zip=" + current_user.getZip() + ",de&appid=" + api_key + "&units=metric&lang=de"))
                     .GET()
                     .build();
 
             HttpResponse<String> get_response = http_client.send(get_request, BodyHandlers.ofString());
 
-        JSONObject json = new JSONObject(((String)get_response.body()).substring(0,((String) get_response.body()).length()));
+            JSONObject json = new JSONObject(((String) get_response.body()).substring(0, ((String) get_response.body()).length()));
             weather = json.getJSONArray("weather").getJSONObject(0).getString("description");
             temperature = json.getJSONObject("main").getDouble("temp");
-        } catch (Exception e){}
+        } catch (Exception e) {
+        }
 
-        if(weather.equals(""))
+        if (weather.equals(""))
             return "Es ist ein Fehler aufgetreten!";
         else
             return weather + ": " + temperature + " °C";
 
     }
 
-    public String weather_forecast(String destination_zip){
+    public String weather_forecast(String destination_zip) {
 
         String weather_day_1 = "";
         String weather_day_2 = "";
@@ -190,17 +370,17 @@ public class System {
         double temperature_day_3_low = 1;
 
 
-        try{
+        try {
             HttpClient http_client = HttpClient.newHttpClient();
 
             HttpRequest get_request = HttpRequest.newBuilder()
-                                                .uri(new URI("https://api.openweathermap.org/data/2.5/forecast?zip="+destination_zip+",de&appid="+api_key+"&units=metric&lang=de"))
+                    .uri(new URI("https://api.openweathermap.org/data/2.5/forecast?zip=" + destination_zip + ",de&appid=" + api_key + "&units=metric&lang=de"))
                     .GET()
                     .build();
 
             HttpResponse<String> get_response = http_client.send(get_request, BodyHandlers.ofString());
 
-            JSONObject json = new JSONObject(((String)get_response.body()).substring(0,((String) get_response.body()).length()));
+            JSONObject json = new JSONObject(((String) get_response.body()).substring(0, ((String) get_response.body()).length()));
             weather_day_1 = json.getJSONArray("list").getJSONObject(11).getJSONArray("weather").getJSONObject(0).getString("description");
             weather_day_2 = json.getJSONArray("list").getJSONObject(19).getJSONArray("weather").getJSONObject(0).getString("description");
             weather_day_3 = json.getJSONArray("list").getJSONObject(27).getJSONArray("weather").getJSONObject(0).getString("description");
@@ -220,14 +400,15 @@ public class System {
             temperature_day_3_3 = json.getJSONArray("list").getJSONObject(28).getJSONObject("main").getDouble("temp");
             temperature_day_3_4 = json.getJSONArray("list").getJSONObject(30).getJSONObject("main").getDouble("temp");
 
-        } catch (Exception e){}
+        } catch (Exception e) {
+        }
 
         temperature_day_1.add(temperature_day_1_1);
         temperature_day_1.add(temperature_day_1_2);
         temperature_day_1.add(temperature_day_1_3);
         temperature_day_1.add(temperature_day_1_4);
 
-        temperature_day_1_high = (double) temperature_day_1.toArray()[temperature_day_1.size()-1];
+        temperature_day_1_high = (double) temperature_day_1.toArray()[temperature_day_1.size() - 1];
         temperature_day_1_low = (double) temperature_day_1.toArray()[0];
 
         temperature_day_2.add(temperature_day_2_1);
@@ -235,7 +416,7 @@ public class System {
         temperature_day_2.add(temperature_day_2_3);
         temperature_day_2.add(temperature_day_2_4);
 
-        temperature_day_2_high = (double) temperature_day_2.toArray()[temperature_day_1.size()-1];
+        temperature_day_2_high = (double) temperature_day_2.toArray()[temperature_day_1.size() - 1];
         temperature_day_2_low = (double) temperature_day_2.toArray()[0];
 
         temperature_day_3.add(temperature_day_3_1);
@@ -243,10 +424,10 @@ public class System {
         temperature_day_3.add(temperature_day_3_3);
         temperature_day_3.add(temperature_day_3_4);
 
-        temperature_day_3_high = (double) temperature_day_3.toArray()[temperature_day_1.size()-1];
+        temperature_day_3_high = (double) temperature_day_3.toArray()[temperature_day_1.size() - 1];
         temperature_day_3_low = (double) temperature_day_3.toArray()[0];
 
-        if(weather_day_1.equals("")||weather_day_2.equals("")||weather_day_3.equals(""))
+        if (weather_day_1.equals("") || weather_day_2.equals("") || weather_day_3.equals(""))
             return "Es ist ein Fehler aufgetreten!";
         else
             return "Morgen: " + weather_day_1 + ": Minimum: " + temperature_day_1_low + " °C" + "; Maximum: " + temperature_day_1_high + " °C\n"
@@ -254,7 +435,7 @@ public class System {
                     + "Überübermorgen: " + weather_day_3 + ": Minimum: " + temperature_day_3_low + " °C" + "; Maximum: " + temperature_day_3_high + " °C";
     }
 
-    public String distance(String destination_zip){
+    public String distance(String destination_zip) {
 
         double lon1 = -1;
         double lon2 = -1;
@@ -268,35 +449,36 @@ public class System {
             while ((line = reader.readLine()) != null) {
                 line = line.replace("\"", "");
 
-                if(line.split(";")[0].equals(destination_zip)){
+                if (line.split(";")[0].equals(destination_zip)) {
                     lon2 = Double.parseDouble(line.split(";")[2]);
                     lat2 = Double.parseDouble(line.split(";")[3]);
                 }
 
-                if(line.split(";")[0].equals(""+current_user.getZip())){
+                if (line.split(";")[0].equals("" + current_user.getZip())) {
                     lon1 = Double.parseDouble(line.split(";")[2]);
                     lat1 = Double.parseDouble(line.split(";")[3]);
                 }
             }
-        } catch (Exception e) {}
+        } catch (Exception e) {
+        }
 
-        if(lon1==-1||lon2==-1||lat1==-1||lat2==-1)
+        if (lon1 == -1 || lon2 == -1 || lat1 == -1 || lat2 == -1)
             return "Es ist ein Fehler aufgetreten!";
 
-        double dLat = lat2-lat1;
-        double dLon = lon2-lon1;
+        double dLat = lat2 - lat1;
+        double dLon = lon2 - lon1;
 
-        double a = Math.pow(Math.sin(Math.toRadians(dLat/2.0)), 2) + Math.pow(Math.sin(Math.toRadians(dLon/2.0)), 2) * Math.cos(Math.toRadians(lat1)) * Math.cos(Math.toRadians(lat2));
+        double a = Math.pow(Math.sin(Math.toRadians(dLat / 2.0)), 2) + Math.pow(Math.sin(Math.toRadians(dLon / 2.0)), 2) * Math.cos(Math.toRadians(lat1)) * Math.cos(Math.toRadians(lat2));
 
-        double distance = 6378.388 * 2.0 * Math.atan2(Math.sqrt(a), Math.sqrt(1.0-a));
+        double distance = 6378.388 * 2.0 * Math.atan2(Math.sqrt(a), Math.sqrt(1.0 - a));
 
-        return "" + (Math.round((distance * 1.25)*1000)/1000.0) + " km";
+        return "" + (Math.round((distance * 1.25) * 1000) / 1000.0) + " km";
 
     }
 
-    public void calc_all_distances(){
+    public void calc_all_distances() {
 
-        if(!this.distances.isEmpty())
+        if (!this.distances.isEmpty())
             return;
 
         InputStream inputStream = System.class.getResourceAsStream("/zip.csv");
@@ -310,31 +492,32 @@ public class System {
                 this.distances.add(line.split(";")[0] + ";" + line.split(";")[1] + ";" + Double.parseDouble(distance(line.split(";")[0]).replace(" km", "")));
 
             }
-        } catch (Exception e) {}
+        } catch (Exception e) {
+        }
     }
 
-    public String[] travel_time(String destination_zip){
+    public String[] travel_time(String destination_zip) {
 
         String[] result = new String[2];
 
-        if(distance(destination_zip).equals("Es ist ein Fehler aufgetreten!")){
+        if (distance(destination_zip).equals("Es ist ein Fehler aufgetreten!")) {
             result[0] = "Es ist ein Fehler aufgetreten!";
             result[1] = "Es ist ein Fehler aufgetreten!";
             return result;
         }
 
-        result[0] = "" + (Math.round(((Double.parseDouble(distance(destination_zip).replace(" km", "")) / current_user.getCar_avg_kmh()))*1000) / 1000.0) + " h";
-        result[1] = "" + (Math.round(((Double.parseDouble(distance(destination_zip).replace(" km", "")) / current_user.getBike_avg_kmh()))*1000) / 1000.0) + " h";
+        result[0] = "" + (Math.round(((Double.parseDouble(distance(destination_zip).replace(" km", "")) / current_user.getCar_avg_kmh())) * 1000) / 1000.0) + " h";
+        result[1] = "" + (Math.round(((Double.parseDouble(distance(destination_zip).replace(" km", "")) / current_user.getBike_avg_kmh())) * 1000) / 1000.0) + " h";
 
         return result;
     }
 
-    public String calc_l_consumption(String destination_zip){
+    public String calc_l_consumption(String destination_zip) {
 
-        if(distance(destination_zip).equals("Es ist ein Fehler aufgetreten!"))
+        if (distance(destination_zip).equals("Es ist ein Fehler aufgetreten!"))
             return "Es ist ein Fehler aufgetreten!";
 
-        return "" + (Math.round((Double.parseDouble(distance(destination_zip).replace(" km", "")) * (current_user.getCar_l_100km() / 100.0))*1000)/1000.0) + " l";
+        return "" + (Math.round((Double.parseDouble(distance(destination_zip).replace(" km", "")) * (current_user.getCar_l_100km() / 100.0)) * 1000) / 1000.0) + " l";
 
     }
 }

src/main/java/de/hs_mannheim/domain/User.java

@@ -5,11 +5,25 @@ public class User {
     private String username = "";
     private String password = "";
     private String hometown = "";
-    private int zip;
+    private int zip = 0;
     private String car_name = "";
-    private double car_l_100km;
-    private double car_avg_kmh;
-    private double bike_avg_kmh;
+    private double car_l_100km = 0;
+    private double car_avg_kmh = 0;
+    private double bike_avg_kmh = 0;
+
+    public User(){}
+
+    public User(String username, String password, String hometown, int zip
+                , String car_name, double car_l_100km, double car_avg_kmh, double bike_avg_kmh){
+        this.username = username;
+        this.password = password;
+        this.hometown = hometown;
+        this.zip = zip;
+        this.car_name = car_name;
+        this.car_l_100km = car_l_100km;
+        this.car_avg_kmh = car_avg_kmh;
+        this.bike_avg_kmh = bike_avg_kmh;
+    }
 
     public String getUsername() {
         return username;
@@ -74,4 +88,9 @@ public class User {
     public void setBike_avg_kmh(double bike_avg_kmh) {
         this.bike_avg_kmh = bike_avg_kmh;
     }
+
+    public String toString(){
+        return this.username + ";" + System.encoding(this.password) + ";" + this.hometown + ";" + this.zip + ";" + this.car_name + ";"
+                            + this.car_l_100km + ";" + this.car_avg_kmh + ";" + this.bike_avg_kmh;
+    }
 }

src/main/resources/user_data.csv

@@ -0,0 +1,2 @@
+Daniel;MTQwMURhbmllbA==;Mannheim;68305;BMW;1.5;50.4;40.2
+David;MTIzRXNlbA==;Mannheim;68161;AMG;10.0;300.0;20.0 

src/test/java/de/hs_mannheim/domain/SystemTest.java

@@ -86,4 +86,68 @@ public class SystemTest {
         assertEquals(true, Double.parseDouble(current_system.distance(current_system.random_destinations_bike().get(0).split(";")[0]).replace(" km", "")) < 100);
     }
 
+    @Test
+    public void encoding(){
+
+        String test_password = "123Esel";
+
+        assertEquals("MTIzRXNlbA==",System.encoding(test_password));
+
+    }
+
+    @Test
+    public void decoding(){
+
+        String test_password = "MTIzRXNlbA==";
+
+        assertEquals("123Esel",System.decoding(test_password));
+
+    }
+    
+    @Test
+    public void sign_in_user() {
+
+        assertEquals(true, current_system.sign_in_user("Daniel", "1401Daniel"));
+        assertEquals("Daniel",current_system.getDetails()[0]);
+
+    }
+
+    @Test
+    public void sign_out_user() {
+
+        assertEquals(true, current_system.sign_in_user("David", "123Esel"));
+        assertEquals("David",current_system.getDetails()[0]);
+        current_system.sign_out_user();
+        assertEquals("",current_system.getDetails()[0]);
+
+    }
+
+    @Test
+    public void sign_up_user(){
+        // Username darf nicht doppelt vorkommen!
+        assertEquals(false, current_system.sign_up_user("David","123Esel","Mannheim","68161","AMG","10","300","20"));
+        assertEquals(true, current_system.sign_up_user("Selim","Penis69","Mannheim","68161","AMG","10","300","20"));
+        // PLZ muss mit Stadt übereinstimmen
+        assertEquals(false, current_system.sign_up_user("Lukas","123Esel","Mannheim","11105","AMG","10","300","20"));
+        assertEquals(true, current_system.sign_up_user("Lukas","123Esel","Mannheim","68305","AMG","10","300","20"));
+
+        assertEquals("Lukas",current_system.getDetails()[0]);
+        current_system.sign_out_user();
+        assertEquals("",current_system.getDetails()[0]);
+    }
+
+    @Test
+    public void change_user_details(){
+        
+        current_system.sign_in_user("David", "123Esel");
+        current_system.change_user_details("Enes", "Penis123", "Mannheim", "68161", "", "", "", "");
+        assertEquals("Enes", current_system.getDetails()[0]);
+
+    }
+    /*
+    Tests auf Basis von user_data.csv:  Daniel;MTQwMURhbmllbA==;Mannheim;68305;BMW;1.5;50.4;40.2
+                                        David;MTIzRXNlbA==;Mannheim;68161;AMG;10.0;300.0;20.0 
+    */
+
+
 }

src/test/resources/user_data.csv

@@ -0,0 +1,2 @@
+Daniel;MTQwMURhbmllbA==;Mannheim;68305;BMW;1.5;50.4;40.2
+David;MTIzRXNlbA==;Mannheim;68161;AMG;10.0;300.0;20.0