[PIO] Kolokwium

package com.Talar;

public class Main {


    public static void main(String[] args) {
        Container c = new Container();

        Pack p1 = new Pack("Pudlo", 5.25);
        Pack p2 = new Pack("Karton", 4.75);
        Pack p3 = new Pack("Paczka", 5.00);
        Pack p4;

        try{
            p4 = new Pack(null, 1);
        }catch(IllegalArgumentException e){
            System.out.println("Bład: " + e);
        }

        try{
            p4 = new Pack("AAA", -5);
        }catch(IllegalArgumentException e){
            System.out.println("Bład: " + e);
        }

        p4 = new Pack("Paczka", 5);

        c.push(p1);
        c.push(p2);
        c.push(p3);
        c.push(p4);
        c.print();
        System.out.println("Waga wszystkich paczek: " + c.totalWeight() + "kg");

        System.out.println("\nPo usunieciu: ");
        c.removePacks("Paczka");
        c.print();
        System.out.println("Waga wszystkich paczek: " + c.totalWeight() + "kg");
    }
}


package com.Talar;

//klasa pack: nazwa (string), weight (double)

public class Pack {
    private String name;
    private double weight;

    public Pack(String name, double weight) {
        if(name != null && !name.isEmpty()){
            this.name = name;
        }
        else throw new IllegalArgumentException("Pusta nazwa!");

        if(weight > 0){
            this.weight = weight;
        }
        else throw new IllegalArgumentException("Bledna waga!");
    }

    public String getName() {
        return name;
    }

    public double getWeight() {
        return weight;
    }
}


package com.Talar;

import java.util.List;
import java.util.ArrayList;
import java.util.Iterator;

public class Container {
    private List<Pack> packs = new ArrayList<Pack>();

    public Container() { }

    public void push(Pack p){
        if(p != null){
            packs.add(p);
        }
        else throw new IllegalArgumentException("Obiekt nie istnieje");
    }

    public void print(){
        for(Pack p : packs){
            System.out.println(p.getName() +", " + p.getWeight());
        }
    }

    public double totalWeight(){
        double result = 0;
        for(Pack p : packs){
            result += p.getWeight();
        }

        return result;
    }

    public boolean removePacks(String name){
        boolean result = false;
        for(Iterator<Pack> it = packs.iterator(); it.hasNext(); ){
            Pack p = it.next();
            if(p.getName().equals(name)){
                it.remove();
                result = true;
            }
        }
        return result;
    }
}

package com.Talar;

import org.junit.Before;
import org.junit.Test;

import static org.junit.Assert.*;

public class PackTest {

    Pack p;

    @Before
    public void setUp() throws Exception{
        p = new Pack("Paczka",5.00);
    }

    @Test(expected = IllegalArgumentException.class)
    public void createObjNull(){
        p = new Pack(null, 5);
    }

    @Test(expected = IllegalArgumentException.class)
    public void createObjWroghWeight(){
        p = new Pack("Paczka", -5);
    }

    @Test(expected = IllegalArgumentException.class)
    public void createObjEmptyName(){
        p = new Pack("", 5);
    }

    @Test
    public void getName() {
        assertEquals("Paczka", p.getName());
    }

    @Test
    public void getWeight() {
        assertEquals(5.00, p.getWeight(), 0);
    }
}

package com.Talar;

import org.junit.Before;
import org.junit.Test;

import static org.junit.Assert.*;

public class ContainerTest {

    Container c;

    @Before
    public void setUp() throws Exception {
        c = new Container();
    }

    @Test
    public void push() {
        Pack p = new Pack("Paczka", 5);
        c.push(p);
    }

    @Test(expected = IllegalArgumentException.class)
    public void pushNull(){
        Pack p = null;
        c.push(p);
    }

    @Test
    public void totalWeight() {
        Pack p = new Pack("Paczka", 5);
        c.push(p);
        assertEquals(5, c.totalWeight(), 0);
    }

    @Test
    public void removeExistingPacks() {
        Pack p = new Pack("Paczka", 5);
        c.push(p);
        assertEquals(true, c.removePacks("Paczka"));
    }

    @Test
    public void removeNotExistingPacks(){
        Pack p = new Pack("Paczka", 5);
        c.push(p);
        assertEquals(false, c.removePacks("Karton"));
    }
}