实验内容：
1 package sizeyunsuan; 2 3 import static org.junit.Assert.*; 4 5 import org.junit.Test; 6 7 public class SiZeYunSuanTest { 8 9 @Test //test1-4为一个运算符的运算 10 public void testTest1()throws Exception 11 { 12 SiZeYunSuan core=new SiZeYunSuan(); 13 int a=core.test1('-',2,8); 14 assertEquals(-6,a); 15 System.out.print(a); 16 System.out.print(" 减法运算"); 17 System.out.println(); 18 } 19 @Test 20 public void testTest2()throws Exception { 21 SiZeYunSuan core=new SiZeYunSuan(); 22 int a=core.test1('+',3,6); 23 assertEquals(9,a); 24 System.out.print(a); 25 System.out.println(" 加法运算"); 26 System.out.println(); 27 } 28 @Test 29 public void testTest3()throws Exception { 30 SiZeYunSuan core=new SiZeYunSuan(); 31 int a=core.test1('*',2,9); 32 assertEquals(18,a); 33 System.out.print(a); 34 System.out.println(" 乘法运算"); 35 System.out.println(); 36 } 37 @Test 38 public void testTest4() throws ChuShuWeiLingException{ 39 SiZeYunSuan core=new SiZeYunSuan(); 40 try{ 41 int a=core.test1('/',6,0); 42 System.out.print(a); 43 assertEquals(2,a); 44 45 }catch(Exception e){} 46 47 System.out.println(" 除法运算"); 48 System.out.println(); 49 } 50 51 @Test 52 public void testTest5() { 53 SiZeYunSuan core=new SiZeYunSuan(); 54 int b=core.test2(3); 55 assertEquals(6,b); 56 System.out.println("阶乘运算"); 57 } 58 @Test 59 public void testTest6() { 60 SiZeYunSuan core=new SiZeYunSuan(); 61 int b=core.test2(4); 62 assertEquals(24,b); 63 System.out.println("阶乘运算2"); 64 } 65 @Test 66 public void testTest7()//这是两个运算符的运算 67 { 68 SiZeYunSuan core=new SiZeYunSuan(); 69 int a=core.test1(1,2,4,6); 70 assertEquals(0,a); 71 System.out.println("这是加减混合运算"); 72 int b=core.test1(2,2,4,6); 73 assertEquals(26,b); 74 System.out.println("这是加乘混合运算"); 75 int c=core.test1(3,2,6,6); 76 assertEquals(3,c); 77 System.out.println("这是加除混合运算"); 78 int d=core.test1(4,2,4,6); 79 assertEquals(-22,d); 80 System.out.println("这是减乘混合运算"); 81 int e=core.test1(5,2,6,6); 82 assertEquals(1,e); 83 System.out.println("这是减除混合运算"); 84 int f=core.test1(6,2,4,4); 85 assertEquals(2,f); 86 System.out.println("这是乘除混合运算"); 87 } 88 @Test 89 public void testTest8()//这是三个运算符的运算 90 { 91 SiZeYunSuan core=new SiZeYunSuan(); 92 int a=core.test1(1,2,4,6,8); 93 assertEquals(-42,a); 94 System.out.println("这是加减乘混合运算"); 95 int b=core.test1(2,2,4,6,6); 96 assertEquals(5,b); 97 System.out.println("这是加减除混合运算"); 98 99 } 100 @Test 101 public void testTest9()//这是四个运算符的运算 102 { 103 SiZeYunSuan core=new SiZeYunSuan(); 104 int a=core.test1(1,5,4,3,2,1); 105 assertEquals(3,a); 106 System.out.println("这是加减乘除混合运算"); 107 108 } 109 110 }
1 package sizeyunsuan; 2 3 public class SiZeYunSuan { 4 int ranswer=0; 5 public int test1(char op,int a,int b)throws ChuShuWeiLingException{ 6 if(a>0&&b>0) 7 { 8 System.out.print(String.valueOf(a)+String.valueOf(op)+String.valueOf(b)+"="); 9 } 10 else if(a<0&&b>0) 11 { 12 System.out.print("("+String.valueOf(a)+")"+String.valueOf(op)+String.valueOf(b)+"="); 13 } 14 else if(a>0&&b<0) 15 { 16 System.out.print(String.valueOf(a)+String.valueOf(op)+"("+String.valueOf(b)+")"+"="); 17 } 18 else 19 { 20 System.out.print("("+String.valueOf(a)+")"+String.valueOf(op)+"("+String.valueOf(b)+")"+"="); 21 } 22 switch(op) 23 { 24 25 case '+': ranswer=a+b;break; 26 case '-': ranswer=a-b;break; 27 case '*': ranswer=a*b;break; 28 case '/': try{ if(b==0){throw new ChuShuWeiLingException();}}catch(Exception e){}ranswer=a/b;break; 29 } 30 return ranswer; 31 } 32 33 public int test2(int c){ 34 int jc=1; 35 for(int i=c;i>0;i--) 36 { 37 jc=jc*i; 38 } 39 ranswer=jc; 40 return ranswer; 41 } 42 43 public int test1(int num,int a,int b,int c){ 44 45 switch(num) 46 { 47 case 1: ranswer=a+b-c;break; 48 case 2: ranswer=a+b*c;break; 49 case 3: ranswer=a+b/c;break; 50 case 4: ranswer=a-b*c;break; 51 case 5: ranswer=a-b/c;break; 52 case 6: ranswer=a*b/c;break; 53 } 54 return ranswer; 55 } 56 public int test1(int num,int a,int b,int c,int d){ 57 58 switch(num) 59 { 60 case 1: ranswer=a+b-c*d;break; 61 case 2: ranswer=a+b-c/d;break; 62 } 63 return ranswer; 64 } 65 public int test1(int num,int a,int b,int c,int d,int e){ 66 67 switch(num) 68 { 69 case 1: ranswer=a+b-c*d/e;break; 70 } 71 return ranswer; 72 } 73 }
1 package sizeyunsuan; 2 3 public class ChuShuWeiLingException extends Exception { 4 public ChuShuWeiLingException() 5 { 6 System.out.println("除数不能为0！"); 7 } 8 9 }
上面这部分是实验总的代码，下面各部分会显示每一个部分的伪代码！
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1.开发环境---Eclipse，Eclipse-Junit4
2.人员---吕日荣（201306114315）、张梓锋（201306114318）
3.第二阶段目标 - 通过测试程序和API 接口测试其简单的加减乘除功能。并能看到代码覆盖率。
下面是加减乘除阶乘及测试的伪代码：
@Test //test1-4为一个运算符的运算 public void testTest1()throws Exception { SiZeYunSuan core=new SiZeYunSuan(); int a=core.test1('-',2,8); assertEquals(-6,a); System.out.print(a); System.out.print(" 减法运算"); System.out.println(); } @Test public void testTest2()throws Exception { SiZeYunSuan core=new SiZeYunSuan(); int a=core.test1('+',3,6); assertEquals(9,a); System.out.print(a); System.out.println(" 加法运算"); System.out.println(); } @Test public void testTest3()throws Exception { SiZeYunSuan core=new SiZeYunSuan(); int a=core.test1('*',2,9); assertEquals(18,a); System.out.print(a); System.out.println(" 乘法运算"); System.out.println(); } @Test public void testTest4() throws ChuShuWeiLingException{ SiZeYunSuan core=new SiZeYunSuan(); try{ int a=core.test1('/',6,0); System.out.print(a); assertEquals(2,a); }catch(Exception e){} System.out.println(" 除法运算"); System.out.println(); } @Test public void testTest5() { SiZeYunSuan core=new SiZeYunSuan(); int b=core.test2(3); assertEquals(6,b); System.out.println("阶乘运算"); } @Test public void testTest6() { SiZeYunSuan core=new SiZeYunSuan(); int b=core.test2(4); assertEquals(24,b); System.out.println("阶乘运算2"); }
int ranswer=0; public int test1(char op,int a,int b)throws ChuShuWeiLingException{ if(a>0&&b>0) { System.out.print(String.valueOf(a)+String.valueOf(op)+String.valueOf(b)+"="); } else if(a<0&&b>0) { System.out.print("("+String.valueOf(a)+")"+String.valueOf(op)+String.valueOf(b)+"="); } else if(a>0&&b<0) { System.out.print(String.valueOf(a)+String.valueOf(op)+"("+String.valueOf(b)+")"+"="); } else { System.out.print("("+String.valueOf(a)+")"+String.valueOf(op)+"("+String.valueOf(b)+")"+"="); } switch(op) { case '+': ranswer=a+b;break; case '-': ranswer=a-b;break; case '*': ranswer=a*b;break; case '/': try{ if(b==0){throw new ChuShuWeiLingException();}}catch(Exception e){}ranswer=a/b;break; } return ranswer; } public int test2(int c){ int jc=1; for(int i=c;i>0;i--) { jc=jc*i; } ranswer=jc; return ranswer; }
然后是两个运算符，三个运算符及四个运算符构造方法的重载
public int test1(int num,int a,int b,int c){ switch(num) { case 1: ranswer=a+b-c;break; case 2: ranswer=a+b*c;break; case 3: ranswer=a+b/c;break; case 4: ranswer=a-b*c;break; case 5: ranswer=a-b/c;break; case 6: ranswer=a*b/c;break; } return ranswer; } public int test1(int num,int a,int b,int c,int d){ switch(num) { case 1: ranswer=a+b-c*d;break; case 2: ranswer=a+b-c/d;break; } return ranswer; } public int test1(int num,int a,int b,int c,int d,int e){ switch(num) { case 1: ranswer=a+b-c*d/e;break; } return ranswer; }
@Test public void testTest7()//这是两个运算符的运算 { SiZeYunSuan core=new SiZeYunSuan(); int a=core.test1(1,2,4,6); assertEquals(0,a); System.out.println("这是加减混合运算"); int b=core.test1(2,2,4,6); assertEquals(26,b); System.out.println("这是加乘混合运算"); int c=core.test1(3,2,6,6); assertEquals(3,c); System.out.println("这是加除混合运算"); int d=core.test1(4,2,4,6); assertEquals(-22,d); System.out.println("这是减乘混合运算"); int e=core.test1(5,2,6,6); assertEquals(1,e); System.out.println("这是减除混合运算"); int f=core.test1(6,2,4,4); assertEquals(2,f); System.out.println("这是乘除混合运算"); } @Test public void testTest8()//这是三个运算符的运算 { SiZeYunSuan core=new SiZeYunSuan(); int a=core.test1(1,2,4,6,8); assertEquals(-42,a); System.out.println("这是加减乘混合运算"); int b=core.test1(2,2,4,6,6); assertEquals(5,b); System.out.println("这是加减除混合运算"); } @Test public void testTest9()//这是四个运算符的运算 { SiZeYunSuan core=new SiZeYunSuan(); int a=core.test1(1,5,4,3,2,1); assertEquals(3,a); System.out.println("这是加减乘除混合运算"); }
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4.第三阶段目标 - 通过测试程序和API 接口测试对于各种参数的支持。并能看到代码覆盖率。
其中我们解决了除0错误。
通过这些代码我们能够解决除0错误
5.心得：通过这个实验，我对这个测试功能有了更深的了解，我和我的小伙伴在工作过程中都有互相的指点，在这个过程中得到了进步。这是一个新的内容，以前我们并没有考虑这这个测试功能，或者说我们并没有意识到我们的代码要进行测试。而这是不对的。通过这个实验，我觉得对于以后的编程会有一个新的突破。因为有了测试功能，我们的代码的容错率就有了大大的提升，当我们遇到错误的时候，也更清楚如何解决问题了。