ExceptionTestCase


1   package junit.extensions;
2   
3   import junit.framework.TestCase;
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  }

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