幕测平台_使用Junit测试异常,测试NextDay函数

Bunny ·

更新时间:2024-11-13

· 780 次阅读

需求

NextDay是一个简单的日期计算器，计算给定日期的下一天的具体日期。如给定2020年1月1日，返回2020年1月2日；给定2020年1月31日，返回2020年2月1日。主要要求考察学生对日期边界以及异常处理的测试的能力。

实现

NextdayTest.java

package net.test;
import static org.junit.Assert.*;
import static org.junit.matchers.JUnitMatchers.containsString;
import net.mooctest.*;
import org.junit.Assert;
import org.junit.Test;
import org.junit.rules.ExpectedException;
public class NextdayTest {
    // 有效
    @Test
    public void testDate01() {
        Date date = new Date(2,29,2016);
        Date d = Nextday.nextDay(date);
        String result = d.toString();
        Assert.assertEquals("3/1/2016",result);
    }
	// 抛出异常
    @Test
    public void testDate02(){
        try{
            Date date = new Date(-1,1,1901);
            Date d = Nextday.nextDay(date);
        }catch (IllegalArgumentException e){
            assertThat(e.getMessage(), containsString("Not a valid month"));
        }
	}
	// 以此类推
}

测试程序内容

Year.java

package net.mooctest;
public class Year extends CalendarUnit {
	public Year(int pYear) {
		setYear(pYear);
	}
	public void setYear(int pYear) {
		setCurrentPos(pYear);
		if (!this.isValid()) {
			throw new IllegalArgumentException("Not a valid month");
		}
	}
	public int getYear() {
		return currentPos;
	}
	public boolean increment() {
		currentPos = currentPos + 1;
		if (currentPos == 0)
			currentPos = 1;
		return true;
	}
	public boolean isLeap() {
		if (currentPos >= 0
				&& (((currentPos % 4 == 0) && (currentPos % 100 != 0)) || (currentPos % 400 == 0)))
			return true;
		else if (currentPos < 0
				&& ((((currentPos * -1) % 4 == 1) && ((currentPos * -1) % 100 != 1)) || ((currentPos * -1) % 400 == 1)))
			return true;
		return false;
	}
	protected boolean isValid() {
		if (this.currentPos != 0)
			return true;
		return false;
	}
	public boolean equals(Object o) {
		if (o instanceof Year) {
			if (this.currentPos == ((Year) o).currentPos)
				return true;
		}
		return false;
	}
}

Month.java

package net.mooctest;
public class Month extends CalendarUnit {
	private Year y;
	private int[] sizeIndex = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
	public Month(int pMonth, Year y) {
		setMonth(pMonth, y);
	}
	public void setMonth(int pMonth, Year y) {
		setCurrentPos(pMonth);
		this.y = y;
		if (!this.isValid()) {
			throw new IllegalArgumentException("Not a valid month");
		}
	}
	public int getMonth() {
		return currentPos;
	}
	public int getMonthSize() {
		if (y.isLeap())
			sizeIndex[1] = 29;
		else
			sizeIndex[1] = 28;
		return sizeIndex[currentPos - 1];
	}
	public boolean increment() {
		currentPos += 1;
		if (currentPos > 12)
			return false;
		else
			return true;
	}
	public boolean isValid() {
		if (y != null && y.isValid())
			if (this.currentPos >= 1 && this.currentPos <= 12)
				return true;
		return false;
	}
	public boolean equals(Object o) {
		if (o instanceof Month) {
			if (this.currentPos == ((Month) o).currentPos
					&& this.y.equals(((Month) o).y))
				return true;
		}
		return false;
	}
}

Day.java

package net.mooctest;
public class Day extends CalendarUnit {
	private Month m;
	public Day(int pDay, Month m) {
		setDay(pDay, m);
	}
	public boolean increment() {
		currentPos += 1;
		if (currentPos = 1 && this.currentPos <= m.getMonthSize())
				return true;
		return false;
	}
	public boolean equals(Object o) {
		if (o instanceof Day) {
			if (this.currentPos == ((Day) o).currentPos
					&& this.m.equals(((Day) o).m))
				return true;
		}
		return false;
	}
}

Date.java

package net.mooctest;
public class Date {
	private Day d;
	private Month m;
	private Year y;
	public Date(int pMonth, int pDay, int pYear) {
		y = new Year(pYear);
		m = new Month(pMonth, y);
		d = new Day(pDay, m);
	}
	public void increment() {
		if (!d.increment()) {
			if (!m.increment()) {
				y.increment();
				m.setMonth(1, y);
			}
			d.setDay(1, m);
		}
	}
	public void printDate() {
		System.out.println(m.getMonth() + "/" + d.getDay() + "/" + y.getYear());
	}
	public Day getDay() {
		return d;
	}
	public Month getMonth() {
		return m;
	}
	public Year getYear() {
		return y;
	}
	public boolean equals(Object o) {
		if (o instanceof Date) {
			if (this.y.equals(((Date) o).y) && this.m.equals(((Date) o).m)
					&& this.d.equals(((Date) o).d))
				return true;
		}
		return false;
	}
	public String toString() {
		return (m.getMonth() + "/" + d.getDay() + "/" + y.getYear());
	}
}

Nextday.java

package net.mooctest;
public class Nextday {
	public static Date nextDay(Date d) {
	    Date dd = new Date(d.getMonth().getCurrentPos(), d.getDay().getCurrentPos(), d.getYear().getCurrentPos());
        dd.increment();
        return dd;
    }
}

CalendarUnit.java

package net.mooctest;
public abstract class CalendarUnit {
	protected int currentPos;
	protected void setCurrentPos(int pCurrentPos) {
		currentPos = pCurrentPos;
	}
	protected int getCurrentPos() {
		return currentPos;
	}
	protected abstract boolean increment();
	protected abstract boolean isValid();
}