OOPExercise3

Area.java

public class Area extends Measurement {
    public Area(int value) {
        super(value);
    }
}

Length.java

public class Length extends Measurement {
    public Length(int value) {
        super(value);
    }

    public Area multiply(Length length) {
        return new Area(this.value * length.value);
    }

    public Length multiply(int scalar) {
        return new Length(this.value * scalar);
    }

    public Length add(Length length) {
        return new Length(this.value + length.value);
    }
}

Measurement.java

public abstract class Measurement {
    public final int value;

    public Measurement(int value) {
        this.value = value;
    }

    public String toString() {
        return "" + value;
    }
}

Rectangle.java

public class Rectangle {

    protected final Length height;
    protected final Length breadth;

    public Rectangle(Length height, Length breadth) {
        this.height = height;
        this.breadth = breadth;
    }

    public Length perimeter() {
        return height.add(breadth).multiply(2);
    }

    public Area area() {
        return height.multiply(breadth);
    }

    public String displayString() {
        return "Rectangle(height=" + height + ", breadth=" + breadth +")";
    }
}

ShapeTests.java

import org.junit.Assert;
import org.junit.Test;


public class ShapeTests {

   @Test
    public void shouldHavePerimeter() {
        Rectangle rectangle = new Rectangle(new Length(4), new Length(5));

        Length perimeter = rectangle.perimeter();
        Assert.assertEquals(18, perimeter.value);
    }

    @Test
    public void shouldHaveArea() {
        Length width = new Length(4);
        Length height = new Length(5);

        Rectangle rectangle = new Rectangle(width, height);

        Area area = rectangle.area();
        Assert.assertEquals(20, area.value);
    }

    @Test
    public void squareShouldHavePerimeter(){
        Square square = new Square(new Length(2));

        Length perimeter = square.perimeter();
        Assert.assertEquals(8, perimeter.value);
    }

    @Test
    public void squareShouldHaveArea(){
        Square square = new Square(new Length(2));

        Area area = square.area();
        Assert.assertEquals(4, area.value);
    }

    @Test
    public void shouldDisplayRectangleDimensions(){
        Rectangle rectangle = new Rectangle(new Length(10), new Length(12));
        Assert.assertEquals("Rectangle(height=10, breadth=12)",rectangle.displayString());

    }

    @Test
    public void shouldDisplaySquareDimensions(){
        Square square = new Square(new Length(10));
        Assert.assertEquals("Square(length=10)",square.displayString());

    }
}

Square.java

public class Square extends Rectangle {

    public Square(Length length) {
        super(length, length);

    }

    public String displayString(){
        return "Square(length=" + height + ")";
    }

}