我在基于测试创建矩形的类上遇到了问题

问题描述

好吧,所以我有一个矩形应该基于以下方法创建:方法点,它将确定其中心的坐标以及高度和宽度的值,所有值均基于此测试

public void testRectangle1() {
        Point center = new Point(20,30);
        Rectangle rect = new Rectangle(center,20,20);
        assertAll(
                () -> assertEquals(10,rect.getTopLeft().getX()),() -> assertEquals(20,rect.getTopLeft().getY()),() -> assertEquals(30,rect.getBottomright().getX()),() -> assertEquals(40,rect.getBottomright().getY()),rect.getWidth()),rect.getHeight())
        );
    }

我有预先写好的班级要点,为了整体清楚起见,我将在这里添加

package net.thumbtack.school.figures.v1;

public class Point {

    private int x,y;

    public Point(int x,int y) {
        this.x = x;
        this.y = y;
    }

    public Point() {
        this(0,0);
    }

    public int getX() {
        return x;
    }

    public void setX(int x) {
        this.x = x;
    }

    public int getY() {
        return y;
    }

    public void setY(int y) {
        this.y = y;
    }

    public void moveto(int newX,int newY) {
        x = newX;
        y = newY;
    }

    public void moveRel(int dx,int dy) {
        x += dx;
        y += dy;
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + x;
        result = prime * result + y;
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        Point other = (Point) obj;
        if (x != other.x)
            return false;
        if (y != other.y)
            return false;
        return true;
    }
}

这是用于创建矩形的类

package net.thumbtack.school.figures.v1;

public class Rectangle {
    public int width;
    public int height;
    public Point center;
    public int xCenter;
    public int yCenter;
    private Point point;



    public Rectangle(Point center,int width,int height) {
        this.width=width;
        this.height=height;
        this.center=center;
    }


    public Point getTopLeft() {
        Point point = getCenter();
        point.moveRel(- width / 2,- height / 2);
        return point;
    }

    public Point getBottomright() {
        Point point = getCenter();
        point.moveRel(width / 2,height / 2);
        return point;
    }

    public int getWidth() {

        return width;
    }


    public int getHeight() {

        return height;
    }

    public Point getCenter() {
       Point center = new Point(xCenter,yCenter);
       return center;
    }

所以问题出在构造器public Rectangle(Point center,int height)中,当我运行测试时它会返回错误的值

预期:,但仍是: 比较失败: 预期:10 实际:-10

预期:,但为: 比较失败: 预期:20 实际:-10

预期:,但仍是: 比较失败: 预期:30 实际:10

预期:,但仍是: 比较失败: 预期:40 实际:10

我不认为当我在其他但类似的压缩器中使用它们时,其他方法都会出现问题。

解决方法

如恶棍所述,您必须先使用xCenteryCenter进行初始化,否则xCenteryCenter的值为0。

修改getCenter()方法:

public Point getCenter() {
    Point point = new Point(center.getX(),center.getY());
    return point;
}