1 package junit.extensions; 2 3 import junit.framework.*; 4 5 /** 6 * A TestCase that expects an Exception of class fExpected to be thrown. 7 * The other way to check that an expected exception is thrown is: 8 * <pre> 9 * try { 10 * shouldThrow(); 11 * } 12 * catch (SpecialException e) { 13 * return; 14 * } 15 * fail("Expected SpecialException"); 16 * </pre> 17 * 18 * To use ExceptionTestCase, create a TestCase like: 19 * <pre> 20 * new ExceptionTestCase("testShouldThrow", SpecialException.class); 21 * </pre> 22 */ 23 public class ExceptionTestCase extends TestCase { 24 Class<?> fExpected; 25 26 public ExceptionTestCase(String name, Class exception) { 27 super(name); 28 fExpected= exception; 29 } 30 /** 31 * Execute the test method expecting that an Exception of 32 * class fExpected or one of its subclasses will be thrown 33 */ 34 protected void runTest() throws Throwable { 35 try { 36 super.runTest(); 37 } 38 catch (Exception e) { 39 if (fExpected.isAssignableFrom(e.getClass())) 40 return; 41 else 42 throw e; 43 } 44 fail("Expected exception " + fExpected); 45 } 46 } 47
