Question

Implement the following class in Java:

Class name: People

Constructor Summary:

public People (String name)

Methods:

public People(String name)

public void setName(String name)

public String getName()

Class name: Truck

Constructor Summary:

public Truck (int licensePlate, int onBoard, People people)

Initially, the truck does not contain any on board the vehicle.

If the number of people on board the vehicle is a negative number, the value of onBoard should be stored as zero.

Methods:

public int getLicensePlate()

Returns license plate of the truck.

public int onBoard()

Returns the number of people currently in the truck.

public List getPeople()

The people currently on board the truck.

public void addPeople()

Adds given person to the truck.

Please write a JUnit test to show functionality.

Answer 1

Solution:

People.java

public class People {
    private String name;

    public People(String name){
        this.name = name;
    }

    public void setName( String name ){
        this.name = name;
    }

    public String getName(){
        return name;
    }
}

Truck.java

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

public class Truck {

    private int licensePlate;
    private int onBoard;
    List<People> peopleList = new ArrayList<People>();

    public Truck( int licensePlate, int onBoard, People people ){
        this.licensePlate = licensePlate;

        if(licensePlate < 0 ){
            this.onBoard = 0;
        }
        else {
            this.onBoard = onBoard;
        }
        peopleList.add(people);
    }

    public int getLicensePlate(){
        return licensePlate;
    }

    public int onBoard(){
        return onBoard;
    }

    public List getPeople(){
        return  peopleList;
    }

    public void addPeople( People people){
        peopleList.add(people);
    }

}

TestPeople.java

import org.junit.Test;

import static junit.framework.TestCase.assertEquals;

public class TestPeople {
    People people = new People("JohnSmith");

    @Test
    public void testGetName(){
        assertEquals("JohnSmith",people.getName());
    }

    @Test
    public void testSetName(){
        people.setName("Angelina");
        assertEquals("Angelina", people.getName());
    }
}

TestTruck.java

import org.junit.Test;

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

import static junit.framework.TestCase.assertEquals;

public class TestTruck {
    People people1 = new People("Smith");

    @Test
    public void testGetLicensePlate(){

        Truck truck = new Truck(100,1, people1);
        assertEquals(100,truck.getLicensePlate());
    }

    @Test
    public void testOnBoard(){
        Truck truck1 = new Truck(100,1, people1);
        assertEquals(1,truck1.onBoard());
    }

    @Test
    public void testOnBoardInNegativeSenario(){
        Truck truck = new Truck(-500,5, people1);
        assertEquals(0,truck.onBoard());
    }

    @Test
    public void testGetPeople(){
        Truck truck = new Truck(-500,5, people1);
        People people2 = new People("John");
        truck.addPeople(people2);
        List<People> peopleList = new ArrayList<People>();
        peopleList.add(people1);
        peopleList.add(people2);
        assertEquals(peopleList,truck.getPeople());
    }

}

Output:

TestPeople

Run: TestPeople Tests pased: 2 of 2 tests-Oms C:Program PilesJava jdk1.8.0 201bin java.exe".. ,9 | ⓥTestPeople testGetName ộtestSetName O ms O ms Oms Process finished with exit code 0

TestTruck

Run:TestTrucktestGetLicensePlate and 3 more Tests passed: 4 of 4 t "C:Program Files Javaljdk1.8.0_201bin java.exe O ms O ms Oms Process finished with exit code 0 O ms 0 ms O ms ,9 v Tests v ⓥTestTruck testOnBoardlnNegativeSenario ⓥ testOnBoard ⓥ testGetLicensePlate testGetPeople