@matfah/

Fuel Depot FR 2011

Java

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Files
  • Main.java
  • FuelDepot.java
  • FuelRobot.java
  • FuelTank.java

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Error: Error: must not create an existing file {"type":"CREATE_FILE","wid":"0.5116377616291155","path":"Main.java","file":{"path":"Main.java","content":{"asEncoding":{"base64":"import java.util.*;
import java.lang.reflect.*;

public class Main {
  public static void main(String[] args) {
    
    for(int i = 0; i < 1000; i++)
      testNextTankToFill();
    for(int i = 0; i < 1000; i++)
      testMoveToLocation();
    System.out.println("All tests passed!");
  }
  
  public static void testNextTankToFill() {
    
    FuelDepot depot = new FuelDepot();
    
    ArrayList<FuelTank> tanks = new ArrayList<FuelTank>();
    String tanksStr = "";
    
    ArrayList<Integer> minPos = new ArrayList<Integer>();
    
    int level = (int)(Math.random()*20);
    
    int next = 0;
    for(int i = (int)(Math.random()*20)+1; i > 0; i--) {
      int tankLevel = (int)(Math.random()*100);
      if(tankLevel < level) {
        
        if(minPos.size() == 0 || tanks.get(minPos.get(0)).getFuelLevel() == tankLevel) {
          minPos.add(next);
        }
        else if(tanks.get(minPos.get(0)).getFuelLevel() > tankLevel) {
          minPos.clear();
          minPos.add(next);
        }
        
      
      }
      tanks.add(new CustomFuelTank(tankLevel));
      tanksStr += tanks.get(tanks.size()-1);
      next++;
    }
    
    FuelRobot filler = new CustomFuelRobot((int)(Math.random()*tanks.size()), Math.random()<0.5);
    int oldPos = filler.getCurrentIndex();
    boolean oldFacing = filler.isFacingRight();
    
    if(minPos.size() == 0)
      minPos.add(oldPos);

    Field fillerField = null;
    
    try {
      fillerField = FuelDepot.class.getDeclaredField("filler");
    }
    catch(Exception e) {
      System.out.println("Error accessing filler instance variable");
      System.exit(0);
    }
    
    fillerField.setAccessible(true);
    
    try {
      fillerField.set(depot, filler);
    }
    catch(Exception e) {
      System.out.println("Error setting filler instance variable");
      System.exit(0);
    }
    
    Field tanksField = null;
    
    try {
      tanksField = FuelDepot.class.getDeclaredField("tanks");
    }
    catch(Exception e) {
      System.out.println("Error accessing tanks instance variable");
      System.exit(0);
    }
    
    tanksField.setAccessible(true);
    
    try {
      tanksField.set(depot, tanks);
    }
    catch(Exception e) {
      System.out.println("Error setting tanks instance variable");
      System.exit(0);
    }
    
    int pos = 0;
    try {
      pos = depot.nextTankToFill(level);
    }
    catch(Exception e) {
      System.out.println("Error calling nextTankToFill() method");
      System.exit(0);
    }
    
    if(!minPos.contains(pos)) {
      
      System.out.println("nextTankToFill() is not returning the right value");
      System.exit(0);
    }
    
    ArrayList<FuelTank> updatedTank = null;
    try {
      updatedTank = (ArrayList<FuelTank>)tanksField.get(depot);
    }
    catch(Exception e) {
      System.out.println("Error accessing tanks instance variable");
      System.exit(0);
    }
    
    String resultTanks = "";
    
    for(FuelTank tank: updatedTank)
      resultTanks += tank;
      
    if(!resultTanks.equals(tanksStr)) {
      System.out.println("nextTankToFill() should not change the tanks instance variable!");
      System.exit(0);
    }
    
    if(filler.getCurrentIndex() != oldPos || filler.isFacingRight() != oldFacing) {
      System.out.println("nextTankToFill() should not change the filler instance variable!");
      System.exit(0);
    }
    
  }
  
  public static void testMoveToLocation() {
    FuelDepot depot = new FuelDepot();
    
    ArrayList<FuelTank> tanks = new ArrayList<FuelTank>();
    String tanksStr = "";
    
    int next = 0;
    for(int i = (int)(Math.random()*20)+1; i > 0; i--) {
      int tankLevel = (int)(Math.random()*100);
      tanks.add(new CustomFuelTank(tankLevel));
      tanksStr += tanks.get(tanks.size()-1);
      next++;
    }
    
    FuelRobot filler = new CustomFuelRobot((int)(Math.random()*tanks.size()), Math.random()<0.5);
    Field fillerField = null;
    
    try {
      fillerField = FuelDepot.class.getDeclaredField("filler");
    }
    catch(Exception e) {
      System.out.println("Error accessing filler instance variable");
      System.exit(0);
    }
    
    fillerField.setAccessible(true);
    
    try {
      fillerField.set(depot, filler);
    }
    catch(Exception e) {
      System.out.println("Error setting filler instance variable");
      System.exit(0);
    }
    
    Field tanksField = null;
    
    try {
      tanksField = FuelDepot.class.getDeclaredField("tanks");
    }
    catch(Exception e) {
      System.out.println("Error accessing tanks instance variable");
      System.exit(0);
    }
    
    tanksField.setAccessible(true);
    
    try {
      tanksField.set(depot, tanks);
    }
    catch(Exception e) {
      System.out.println("Error setting tanks instance variable");
      System.exit(0);
    }
    
    int newLoc = (int)(Math.random() * tanks.size());
    
    try {
      depot.moveToLocation(newLoc);
    }
    catch(Exception e) {
      System.out.println("Error calling moveToLocation()");
      System.exit(0);
    }
    
    if(filler.getCurrentIndex() != newLoc) {
      System.out.println("moveToLocation() does not move the robot to the correct position");
      System.exit(0);
    }
    
    ArrayList<Integer> locs = ((CustomFuelRobot)filler).locs;
    
    for(int x : locs) {
      if(x < 0 || x >= tanks.size()) {
        System.out.println("moveToLocation() moves the robot out of bounds");
        System.exit(0);
      }
    }
    
    ArrayList<FuelTank> updatedTank = null;
    try {
      updatedTank = (ArrayList<FuelTank>)tanksField.get(depot);
    }
    catch(Exception e) {
      System.out.println("Error accessing tanks instance variable");
      System.exit(0);
    }
    
    String resultTanks = "";
    
    for(FuelTank tank: updatedTank)
      resultTanks += tank;
      
    if(!resultTanks.equals(tanksStr)) {
      System.out.println("moveToLocation() should not change the tanks instance variable!");
      System.exit(0);
    }
  }
}

class CustomFuelTank implements FuelTank {
  
  int level;
  
  public CustomFuelTank(int lev) {
    level = lev;
  }
  
  public int getFuelLevel() {
    return level;
  }
}

class CustomFuelRobot implements FuelRobot {

  private int loc;
  private boolean facingRight;
  
  ArrayList<Integer> locs = new ArrayList<Integer>();
  
  public CustomFuelRobot(int loc, boolean facingRight) {
    this.loc = loc;
    this.facingRight = facingRight;
  }

  public int getCurrentIndex() {
    return loc;
  }
  
  public boolean isFacingRight() {
    return facingRight;
  }
  
  public void changeDirection() {
    facingRight = !facingRight;
  }
  
  public void moveForward(int numLocs) {
    if(facingRight) loc += numLocs;
    else loc -= numLocs;
    
    locs.add(loc);
  }

}"},"asBuffer":null},"loaded":true}}
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import java.util.*;
import java.lang.reflect.*;

public class Main {
  public static void main(String[] args) {
    
    for(int i = 0; i < 1000; i++)
      testNextTankToFill();
    for(int i = 0; i < 1000; i++)
      testMoveToLocation();
    System.out.println("All tests passed!");
  }
  
  public static void testNextTankToFill() {
    
    FuelDepot depot = new FuelDepot();
    
    ArrayList<FuelTank> tanks = new ArrayList<FuelTank>();
    String tanksStr = "";
    
    ArrayList<Integer> minPos = new ArrayList<Integer>();
    
    int level = (int)(Math.random()*20);
    
    int next = 0;
    for(int i = (int)(Math.random()*20)+1; i > 0; i--) {
      int tankLevel = (int)(Math.random()*100);
      if(tankLevel < level) {
        
        if(minPos.size() == 0 || tanks.get(minPos.get(0)).getFuelLevel() == tankLevel) {
          minPos.add(next);
        }
        else if(tanks.get(minPos.get(0)).getFuelLevel() > tankLevel) {
          minPos.clear();
          minPos.add(next);
        }
        
      
      }
      tanks.add(new CustomFuelTank(tankLevel));
      tanksStr += tanks.get(tanks.size()-1);
      next++;
    }
    
    FuelRobot filler = new CustomFuelRobot((int)(Math.random()*tanks.size()), Math.random()<0.5);
    int oldPos = filler.getCurrentIndex();
    boolean oldFacing = filler.isFacingRight();
    
    if(minPos.size() == 0)
      minPos.add(oldPos);

    Field fillerField = null;
    
    try {
      fillerField = FuelDepot.class.getDeclaredField("filler");
    }
    catch(Exception e) {
      System.out.println("Error accessing filler instance variable");
      System.exit(0);
    }
    
    fillerField.setAccessible(true);
    
    try {
      fillerField.set(depot, filler);
    }
    catch(Exception e) {
      System.out.println("Error setting filler instance variable");
      System.exit(0);
    }
    
    Field tanksField = null;
    
    try {
      tanksField = FuelDepot.class.getDeclaredField("tanks");
    }
    catch(Exception e) {
      System.out.println("Error accessing tanks instance variable");
      System.exit(0);
    }
    
    tanksField.setAccessible(true);
    
    try {
      tanksField.set(depot, tanks);
    }
    catch(Exception e) {
      System.out.println("Error setting tanks instance variable");
      System.exit(0);
    }
    
    int pos = 0;
    try {
      pos = depot.nextTankToFill(level);
    }
    catch(Exception e) {
      System.out.println("Error calling nextTankToFill() method");
      System.exit(0);
    }
    
    if(!minPos.contains(pos)) {
      
      System.out.println("nextTankToFill() is not returning the right value");
      System.exit(0);
    }
    
    ArrayList<FuelTank> updatedTank = null;
    try {
      updatedTank = (ArrayList<FuelTank>)tanksField.get(depot);
    }
    catch(Exception e) {
      System.out.println("Error accessing tanks instance variable");
      System.exit(0);
    }
    
    String resultTanks = "";
    
    for(FuelTank tank: updatedTank)
      resultTanks += tank;
      
    if(!resultTanks.equals(tanksStr)) {
      System.out.println("nextTankToFill() should not change the tanks instance variable!");
      System.exit(0);
    }
    
    if(filler.getCurrentIndex() != oldPos || filler.isFacingRight() != oldFacing) {
      System.out.println("nextTankToFill() should not change the filler instance variable!");
      System.exit(0);
    }
    
  }
  
  public static void testMoveToLocation() {
    FuelDepot depot = new FuelDepot();
    
    ArrayList<FuelTank> tanks = new ArrayList<FuelTank>();
    String tanksStr = "";
    
    int next = 0;
    for(int i = (int)(Math.random()*20)+1; i > 0; i--) {
      int tankLevel = (int)(Math.random()*100);
      tanks.add(new CustomFuelTank(tankLevel));
      tanksStr += tanks.get(tanks.size()-1);
      next++;
    }
    
    FuelRobot filler = new CustomFuelRobot((int)(Math.random()*tanks.size()), Math.random()<0.5);
    Field fillerField = null;
    
    try {
      fillerField = FuelDepot.class.getDeclaredField("filler");
    }
    catch(Exception e) {
      System.out.println("Error accessing filler instance variable");
      System.exit(0);
    }
    
    fillerField.setAccessible(true);
    
    try {
      fillerField.set(depot, filler);
    }
    catch(Exception e) {
      System.out.println("Error setting filler instance variable");
      System.exit(0);
    }
    
    Field tanksField = null;
    
    try {
      tanksField = FuelDepot.class.getDeclaredField("tanks");
    }
    catch(Exception e) {
      System.out.println("Error accessing tanks instance variable");
      System.exit(0);
    }
    
    tanksField.setAccessible(true);
    
    try {
      tanksField.set(depot, tanks);
    }
    catch(Exception e) {
      System.out.println("Error setting tanks instance variable");
      System.exit(0);
    }
    
    int newLoc = (int)(Math.random() * tanks.size());
    
    try {
      depot.moveToLocation(newLoc);
    }
    catch(Exception e) {
      System.out.println("Error calling moveToLocation()");
      System.exit(0);
    }
    
    if(filler.getCurrentIndex() != newLoc) {
      System.out.println("moveToLocation() does not move the robot to the correct position");
      System.exit(0);
    }
    
    ArrayList<Integer> locs = ((CustomFuelRobot)filler).locs;
    
    for(int x : locs) {
      if(x < 0 || x >= tanks.size()) {
        System.out.println("moveToLocation() moves the robot out of bounds");
        System.exit(0);
      }
    }
    
    ArrayList<FuelTank> updatedTank = null;
    try {
      updatedTank = (ArrayList<FuelTank>)tanksField.get(depot);
    }
    catch(Exception e) {
      System.out.println("Error accessing tanks instance variable");
      System.exit(0);
    }
    
    String resultTanks = "";
    
    for(FuelTank tank: updatedTank)
      resultTanks += tank;
      
    if(!resultTanks.equals(tanksStr)) {
      System.out.println("moveToLocation() should not change the tanks instance variable!");
      System.exit(0);
    }
  }
}

class CustomFuelTank implements FuelTank {
  
  int level;
  
  public CustomFuelTank(int lev) {
    level = lev;
  }
  
  public int getFuelLevel() {
    return level;
  }
}

class CustomFuelRobot implements FuelRobot {

  private int loc;
  private boolean facingRight;
  
  ArrayList<Integer> locs = new ArrayList<Integer>();
  
  public CustomFuelRobot(int loc, boolean facingRight) {
    this.loc = loc;
    this.facingRight = facingRight;
  }

  public int getCurrentIndex() {
    return loc;
  }
  
  public boolean isFacingRight() {
    return facingRight;
  }
  
  public void changeDirection() {
    facingRight = !facingRight;
  }
  
  public void moveForward(int numLocs) {
    if(facingRight) loc += numLocs;
    else loc -= numLocs;
    
    locs.add(loc);
  }

}