实例代码目录结构：
Calculator.java:
1 public class Calculator{ 2 private static int result;//静态变量，用于存储运行结果 3 4 public void add(int n){ 5 result = result+n; 6 } 7 8 public void substract(int n){ 9 result = result-1;//bug：之前应该是 result = result-n 10 } 11 12 public void multiply(int n){ 13 14 }//此方法尚未写好 15 16 public void divide(int n){ 17 result = result/n; 18 } 19 20 public void square(int n){ 21 result = n*n; 22 } 23 24 public void squareRoot(int n){ 25 for(;;){} //bug：死循环 26 } 27 28 public void clear(){ 29 result = 0; 30 } 31 32 public int getResult(){ 33 return result; 34 } 35 } |
CalculatorTest.java:
1 import static org.junit.Assert.*; 2 3 import org.junit.After; 4 import org.junit.Before; 5 import org.junit.Ignore; 6 import org.junit.Test; 7 8 9 public class CalculatorTest { 10 11 private static Calculator calculator = new Calculator(); 12 13 @Before 14 public void setUp() throws Exception { 15 calculator.clear(); 16 } 17 18 @After 19 public void tearDown() throws Exception { 20 } 21 22 @Test 23 public void testAdd() { 24 calculator.add(2); 25 calculator.add(3); 26 assertEquals(5,calculator.getResult()); 27 } 28 29 @Test 30 public void testSubstract() { 31 calculator.add(10); 32 calculator.substract(2); 33 assertEquals(8,calculator.getResult()); 34 } 35 36 @Ignore("Multiply() Not yet implemented") 37 @Test 38 public void testMultiply() { 39 40 } 41 42 @Test 43 public void testDivide() { 44 calculator.add(8); 45 calculator.divide(2); 46 assertEquals(4,calculator.getResult()); 47 } 48 49 @Test(timeout = 1000) 50 public void squareRoot(){ 51 calculator.squareRoot(4); 52 assertEquals(2,calculator.getResult()); 53 } 54 55 @Test(expected = ArithmeticException.class) 56 public void divideByZero(){ 57 calculator.divide(0); 58 } 59 } |
执行结果，"failure Trace"报错或运行失败原因：
（1）squareRoot超时，报错
（2）testSubstract用例失败
（3）testMultiply忽略运行
执行单个用例：
选中用例，右键点击“Run”
