build.gradle

@@ -29,6 +29,7 @@ dependencies {
 
     // beryx uses SLF4J. To remove warning, we add the implementation "no operation"
     implementation 'org.slf4j:slf4j-nop:2.+'
+    implementation 'junit:junit:4.13.1'
 
     // Use JUnit Jupiter API for testing.
     testImplementation 'org.junit.jupiter:junit-jupiter-api:5.8.2'

src/main/java/ch/zhaw/pm2/racetrack/Game.java

@@ -127,6 +127,8 @@ public class Game implements GameSpecification {
         throw new UnsupportedOperationException();
     }
 
+
+
     /**
      * Does indicate if a car would have a crash with a WALL space or another car at the given position.
      * @param carIndex The zero-based carIndex number
@@ -135,7 +137,8 @@ public class Game implements GameSpecification {
      */
     @Override
     public boolean willCarCrash(int carIndex, PositionVector position) {
-        // TODO: implementation
-        throw new UnsupportedOperationException();
+
+
+        return true;
     }
 }

src/main/java/ch/zhaw/pm2/racetrack/PositionVectorNotValid.java

@@ -0,0 +1,9 @@
+package ch.zhaw.pm2.racetrack;
+
+public class PositionVectorNotValid extends Throwable {
+    public PositionVectorNotValid(String message) {
+        super(message);
+    }
+
+    public PositionVectorNotValid() {}
+}

src/main/java/ch/zhaw/pm2/racetrack/Track.java

@@ -1,9 +1,13 @@
 package ch.zhaw.pm2.racetrack;
 
+import ch.zhaw.pm2.racetrack.given.ConfigSpecification;
 import ch.zhaw.pm2.racetrack.given.TrackSpecification;
 
 import java.io.File;
 import java.io.FileNotFoundException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Scanner;
 
 /**
  * This class represents the racetrack board.
@@ -54,8 +58,9 @@ import java.io.FileNotFoundException;
 public class Track implements TrackSpecification {
 
     public static final char CRASH_INDICATOR = 'X';
-
-    // TODO: Add necessary variables
+    private List<String> track;
+    private List<Car> cars;
+    private final List<PositionVector> finishLine;
 
     /**
      * Initialize a Track from the given track file.
@@ -64,9 +69,178 @@ public class Track implements TrackSpecification {
      * @throws FileNotFoundException       if the given track file could not be found
      * @throws InvalidTrackFormatException if the track file contains invalid data (no tracklines, ...)
      */
-    public Track(File trackFile) throws FileNotFoundException, InvalidTrackFormatException {
-        // TODO: implementation
-        throw new UnsupportedOperationException();
+    public Track(File trackFile) throws FileNotFoundException, InvalidTrackFormatException, PositionVectorNotValid {
+        track = new ArrayList<>();
+        cars = new ArrayList<>();
+        finishLine = new ArrayList<>();
+        readFile(trackFile);
+        findFinish();
+        addCars();
+    }
+
+    /**
+     * This method reads the File and saves it to the track ArrayList Line by Line
+     *
+     * @param trackFile the File where the track has been documented
+     * @throws FileNotFoundException if the FilePath is invalid.
+     */
+    private void readFile(File trackFile) throws FileNotFoundException {
+        Scanner scanner = new Scanner(trackFile);
+        while (scanner.hasNextLine()) {
+            track.add(scanner.nextLine());
+        }
+    }
+
+
+    private void addCars() throws InvalidTrackFormatException {
+        ConfigSpecification.SpaceType[] spaceTypes = ConfigSpecification.SpaceType.values();
+        List<Character> allSpaceTypesAsChar = new ArrayList<>();
+        List<Character> usedSymbolForCar = new ArrayList<>();
+
+        for (ConfigSpecification.SpaceType spaceType : spaceTypes) {
+            allSpaceTypesAsChar.add(spaceType.getValue());
+        }
+
+
+        for (int j = 0; j < track.size(); j++) {
+            String line = track.get(j);
+            for (int i = 0; i < line.length(); i++) {
+                char possibleCarChar = line.charAt(i);
+                if (!allSpaceTypesAsChar.contains(possibleCarChar)) {
+                    if (usedSymbolForCar.contains(possibleCarChar)) {
+                        throw new InvalidTrackFormatException();
+                    }
+                    usedSymbolForCar.add(possibleCarChar);
+                    cars.add(new Car(possibleCarChar, new PositionVector(i, j)));
+                }
+            }
+        }
+
+    }
+
+    private void findFinish() throws InvalidTrackFormatException {
+        for (int i = 0; i < track.size(); i++) {
+            String line = track.get(i);
+            for (int j = 0; j < line.length(); j++) {
+                if (line.charAt(j) == ConfigSpecification.SpaceType.FINISH_LEFT.getValue() ||
+                    line.charAt(j) == ConfigSpecification.SpaceType.FINISH_RIGHT.getValue() ||
+                    line.charAt(j) == ConfigSpecification.SpaceType.FINISH_DOWN.getValue() ||
+                    line.charAt(j) == ConfigSpecification.SpaceType.FINISH_UP.getValue()) {
+                    finishLine.add(new PositionVector(j, i));
+                }
+            }
+        }
+        if (finishLine.size() == 0) {
+            throw new InvalidTrackFormatException();
+        }
+        ConfigSpecification.SpaceType finishTyp = getSpaceType(finishLine.get(0));
+        for (PositionVector positionVector : finishLine) {
+            if (getSpaceType(positionVector) != finishTyp) {
+                throw new InvalidTrackFormatException();
+            }
+        }
+    }
+
+    private PositionVector findChar(char symbol) {
+        PositionVector vector = null;
+        for (int i = 0; i < track.size(); i++) {
+            String line = track.get(i);
+            for (int j = 0; j < line.length(); j++) {
+                if (line.charAt(j) == symbol) {
+                    vector = new PositionVector(j, i);
+                }
+            }
+        }
+        return vector;
+    }
+
+    private void drawCharOnTrackIndicator(PositionVector positionVector, char symbol) {
+        String line = track.get(positionVector.getY());
+        line = line.substring(0, positionVector.getX()) + symbol + line.substring(positionVector.getX() + 1);
+        track.remove(positionVector.getY());
+        track.add(positionVector.getY(), line);
+    }
+
+    private void isPositionVectorOnTrack(PositionVector positionVector) throws PositionVectorNotValid {
+        try{
+            track.get(positionVector.getY()).charAt(positionVector.getX());
+        }catch (IndexOutOfBoundsException e) {
+            throw new PositionVectorNotValid();
+        }
+    }
+
+    /**
+     * @return all Cars
+     */
+    public List<Car> getCars() {
+        return cars;
+    }
+
+    /**
+     * @return finishLine
+     */
+    public List<PositionVector> getFinishLine() {
+        return finishLine;
+    }
+
+    /**
+     * @return the track
+     */
+    public List<String> getTrack() {
+        return track;
+    }
+
+    /**
+     * This Method will update the Car on the track
+     * and will make the Car move to the next position
+     *
+     * @param carIndex representing the current Car
+     */
+    public void moveCar(int carIndex) {
+        makeCarMoveInTrack(carIndex);
+        //Change position of car
+        getCar(carIndex).move();
+    }
+
+    /**
+     * This class does change the Position of the car only in the track.
+     *
+     * @param carIndex of the current car
+     */
+    private void makeCarMoveInTrack(int carIndex) {
+        PositionVector positionVector = findChar(getCarId(carIndex));
+        //Removes the Car at Current Pos
+        drawCharOnTrackIndicator(positionVector, ConfigSpecification.SpaceType.TRACK.getValue());
+        //Adds Car at new Position
+        positionVector = cars.get(carIndex).nextPosition();
+        drawCharOnTrackIndicator(positionVector, cars.get(carIndex).getID());
+    }
+
+    /**
+     * This Method will check if the Car could crash at the specific position
+     *
+     * @param positionVector the position to check if the car could crash
+     * @return true if car would crash. Else false.
+     */
+    public boolean willCrashAtPosition(int carIndex, PositionVector positionVector) throws PositionVectorNotValid {
+        isPositionVectorOnTrack(positionVector);
+        char charAtPosition = track.get(positionVector.getY()).charAt(positionVector.getX());
+        if (getCarId(carIndex) == charAtPosition) return false;
+        return (charAtPosition == ConfigSpecification.SpaceType.WALL.value);
+    }
+
+    /**
+     * This Method will make the Car Crash. In Track and in the Car Object
+     *
+     * @param carIndex       representing current Car
+     * @param positionVector where the Crash did happen
+     */
+    public void carDoesCrash(int carIndex, PositionVector positionVector) throws PositionVectorNotValid{
+        isPositionVectorOnTrack(positionVector);
+        Car car = cars.get(carIndex);
+        car.crash();
+        car.setPosition(positionVector);
+        drawCharOnTrackIndicator(new PositionVector(positionVector.getX(), positionVector.getY()), CRASH_INDICATOR);
     }
 
     /**
@@ -78,8 +252,16 @@ public class Track implements TrackSpecification {
      */
     @Override
     public Config.SpaceType getSpaceType(PositionVector position) {
-        // TODO: implementation
-        throw new UnsupportedOperationException();
+        //isPositionVectorOnTrack(position); Should be used but we are not allowed to change method head. We don't use function anyway
+        char charAtPosition = track.get(position.getY()).charAt(position.getX());
+        ConfigSpecification.SpaceType[] spaceTypes = ConfigSpecification.SpaceType.values();
+        for (ConfigSpecification.SpaceType spaceType : spaceTypes) {
+            if (spaceType.getValue() == charAtPosition) {
+                return spaceType;
+            }
+        }
+
+        return null;
     }
 
     /**
@@ -89,8 +271,7 @@ public class Track implements TrackSpecification {
      */
     @Override
     public int getCarCount() {
-        // TODO: implementation
-        throw new UnsupportedOperationException();
+        return cars.size();
     }
 
     /**
@@ -101,8 +282,7 @@ public class Track implements TrackSpecification {
      */
     @Override
     public Car getCar(int carIndex) {
-        // TODO: implementation
-        throw new UnsupportedOperationException();
+        return cars.get(carIndex);
     }
 
     /**
@@ -113,20 +293,19 @@ public class Track implements TrackSpecification {
      */
     @Override
     public char getCarId(int carIndex) {
-        // TODO: implementation
-        throw new UnsupportedOperationException();
+        return cars.get(carIndex).getID();
     }
 
     /**
      * Get the position of the specified car.
+     * Returns Null if carIndex not valid
      *
      * @param carIndex The zero-based carIndex number
      * @return A PositionVector containing the car's current position
      */
     @Override
     public PositionVector getCarPos(int carIndex) {
-        // TODO: implementation
-        throw new UnsupportedOperationException();
+        return findChar(cars.get(carIndex).getID());
     }
 
     /**
@@ -137,8 +316,7 @@ public class Track implements TrackSpecification {
      */
     @Override
     public PositionVector getCarVelocity(int carIndex) {
-        // TODO: implementation
-        throw new UnsupportedOperationException();
+        return cars.get(carIndex).getVelocity();
     }
 
     /**
@@ -152,8 +330,15 @@ public class Track implements TrackSpecification {
      */
     @Override
     public char getCharAtPosition(int y, int x, Config.SpaceType currentSpace) {
-        // TODO: implementation
-        throw new UnsupportedOperationException();
+        char charAtPos = track.get(y).charAt(x);
+        PositionVector positionVector = new PositionVector(x, y);
+        for (Car car : cars) {
+            if (charAtPos == car.getID()) {
+                return charAtPos;
+            }
+        }
+        if (positionVector.equals(findChar(CRASH_INDICATOR))) return CRASH_INDICATOR;
+        return currentSpace.getValue();
     }
 
     /**
@@ -163,7 +348,8 @@ public class Track implements TrackSpecification {
      */
     @Override
     public String toString() {
-        // TODO: implementation
-        throw new UnsupportedOperationException();
+        StringBuilder str = new StringBuilder();
+        for (String line : track) str.append(line).append("\n");
+        return str.toString();
     }
 }

src/test/InvalidTracks/sameCar.txt

@@ -0,0 +1,26 @@
+###############################################################
+#################                                 #############
+###############                                     ###########
+###############                                       #########
+###############         ##################            #########
+###############        ####################           #########
+##############        #####################           #########
+############        ######################           ##########
+#########         ######################           ############
+#########       ######################           ##############
+#########      #####################           ################
+#########        #################           ##################
+#########         ################           ##################
+##########         ##################           ###############
+###########         ####################          #############
+###########         #######################          ##########
+##########         ##########################         #########
+#########         ############################         ########
+########         #############################         ########
+#######         ##############################         ########
+######         #############################           ########
+######         ############################           #########
+######                > a                           ###########
+######                > a                        ##############
+########              > b                     #################
+###############################################################

src/test/java/ch/zhaw/pm2/racetrack/TrackTest.java

@@ -0,0 +1,177 @@
+package ch.zhaw.pm2.racetrack;
+
+import ch.zhaw.pm2.racetrack.given.ConfigSpecification;
+import org.junit.jupiter.api.*;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.util.ArrayList;
+import java.util.List;
+
+
+public class TrackTest {
+    Track trackObj;
+
+    @Nested
+    @DisplayName("Positiv Test Cases")
+    class positivClass {
+
+        @BeforeEach
+        void setup() {
+            File file = new File(".\\tracks\\challenge.txt");
+            try {
+                trackObj = new Track(file);
+
+            } catch (Exception | PositionVectorNotValid e) {
+                System.err.println("Error in Test compareTrack" + e.getMessage());
+            }
+        }
+
+        @Test
+        @DisplayName("Create correct amount of Car instance")
+        void checkCars() {
+            Assertions.assertEquals(2, trackObj.getCarCount());
+        }
+
+        @Test
+        @DisplayName("Create Car instance with correct Symbols / Id")
+        void checkCarId() {
+            Assertions.assertEquals('a', trackObj.getCarId(0));
+            Assertions.assertEquals('b', trackObj.getCarId(1));
+        }
+
+
+        @Test
+        @DisplayName("Check getSpaceTyp")
+        void getSpaceTyp() {
+            Assertions.assertEquals(ConfigSpecification.SpaceType.FINISH_RIGHT, trackObj.getSpaceType(new PositionVector(22, 24)));
+        }
+
+        @Test
+        @DisplayName("Find FinishLine")
+        void findFinish() {
+            List<PositionVector> expected = new ArrayList<>();
+            expected.add(new PositionVector(22, 22));
+            expected.add(new PositionVector(22, 23));
+            expected.add(new PositionVector(22, 24));
+            Assertions.assertEquals(expected, trackObj.getFinishLine());
+        }
+
+        @Test
+        @DisplayName("Converts Trackfile correctly to List<String>")
+        void checkTrack() {
+            Track trackObj;
+            try {
+                trackObj = new Track(new File(".\\tracks\\oval-anticlock-right.txt"));
+                List<String> track = new ArrayList<>();
+                track.add("##################################################");
+                track.add("##################################################");
+                track.add("##############                       #############");
+                track.add("##########                              ##########");
+                track.add("#######                                    #######");
+                track.add("######          #################           ######");
+                track.add("#####          ###################           #####");
+                track.add("#####          ###################           #####");
+                track.add("######          #################           ######");
+                track.add("#######             > a                    #######");
+                track.add("##########          >                   ##########");
+                track.add("##############      > b             ##############");
+                track.add("##################################################");
+                track.add("##################################################");
+                Assertions.assertLinesMatch(track, trackObj.getTrack());
+            } catch (FileNotFoundException | InvalidTrackFormatException | PositionVectorNotValid e) {
+                e.printStackTrace();
+            }
+        }
+
+        @Test
+        @DisplayName("Make Car move down on track")
+        void makeCarMoveDown() {
+            PositionVector beforeMove = trackObj.getCarPos(0);
+            trackObj.getCar(0).accelerate(PositionVector.Direction.DOWN);
+            trackObj.moveCar(0);
+            PositionVector afterMove = trackObj.getCarPos(0);
+            Assertions.assertEquals(beforeMove.getY() + 1, afterMove.getY());
+            Assertions.assertEquals(beforeMove.getX(), afterMove.getX());
+        }
+
+        @Test
+        @DisplayName("Make Car move with (0,0) acceleration on track")
+        void makeCarStay() {
+            PositionVector beforeMove = trackObj.getCarPos(0);
+            trackObj.moveCar(0);
+            PositionVector afterMove = trackObj.getCarPos(0);
+            Assertions.assertEquals(beforeMove.getY(), afterMove.getY());
+            Assertions.assertEquals(beforeMove.getX(), afterMove.getX());
+        }
+
+        @Test
+        @DisplayName("Will Car Crash")
+        void willCarCrash() {
+            try {
+                //Car will Crash
+                Assertions.assertTrue(trackObj.willCrashAtPosition(0, new PositionVector(25, 21)));
+                //Car will not Crash and is on track
+                Assertions.assertFalse(trackObj.willCrashAtPosition(0, new PositionVector(7, 22)));
+                //Car will not Crash and is on finishLine
+                Assertions.assertFalse(trackObj.willCrashAtPosition(0, trackObj.getFinishLine().get(0)));
+            } catch (PositionVectorNotValid positionVectorNotValid) {
+                positionVectorNotValid.printStackTrace();
+                Assertions.fail("Test should not throw error");
+            }
+        }
+
+        @Test
+        @DisplayName("Make Car Crash")
+        void makeCarCrash() {
+            try {
+                trackObj.carDoesCrash(0, new PositionVector(6, 22));
+            } catch (PositionVectorNotValid positionVectorNotValid) {
+                positionVectorNotValid.printStackTrace();
+                Assertions.fail("Test should not throw exception");
+            }
+            Assertions.assertEquals(Track.CRASH_INDICATOR, trackObj.getTrack().get(22).charAt(6));
+            Assertions.assertTrue(trackObj.getCar(0).isCrashed());
+        }
+    }
+
+    @Nested
+    @DisplayName("Negative TestCase")
+    class negativeClass {
+        File file;
+
+        @BeforeEach
+        void setup() {
+            file = new File(".\\tracks\\challenge.txt");
+            try {
+                trackObj = new Track(file);
+
+            } catch (Exception | PositionVectorNotValid e) {
+                System.err.println("Error in Test compareTrack" + e.getMessage());
+            }
+        }
+
+        @Test
+        @DisplayName("Throw error if File not found")
+        void canReadFile() {
+            file = new File(".\\tracks\\NotExisting.txt");
+            Assertions.assertThrows(FileNotFoundException.class, () -> new Track(file));
+        }
+
+        @Test
+        @DisplayName("Throw error if File is invalid")
+        void invalidTrackFile() {
+            File testfile = new File(".\\src\\test\\InvalidTracks\\sameCar.txt");
+            Assertions.assertThrows(InvalidTrackFormatException.class, () -> new Track(testfile));
+        }
+
+        @Test
+        @DisplayName("Invalid Position Vector used")
+        void invalidPositionVector() {
+            Assertions.assertThrows(PositionVectorNotValid.class, () -> trackObj.willCrashAtPosition(0, new PositionVector(100, 200)));
+            Assertions.assertThrows(PositionVectorNotValid.class, () -> trackObj.carDoesCrash(1,new PositionVector(200,100)));
+        }
+
+    }
+
+}