BeforeClass


1   package org.junit;
2   
3   import java.lang.annotation.ElementType  ;
4   import java.lang.annotation.Retention  ;
5   import java.lang.annotation.RetentionPolicy  ;
6   import java.lang.annotation.Target  ;
7   
8   /**
9    * <p>Sometimes several tests need to share computationally expensive setup
10   * (like logging into a database). While this can compromise the independence of 
11   * tests, sometimes it is a necessary optimization. Annotating a <code>public static void</code> no-arg method
12   * with <code>@BeforeClass</code> causes it to be run once before any of 
13   * the test methods in the class. The <code>@BeforeClass</code> methods of superclasses
14   * will be run before those the current class.</p>
15   * 
16   * For example:
17   * <pre>
18   * public class Example {
19   *    &#064;BeforeClass public static void onlyOnce() {
20   *       ...
21   *    }
22   *    &#064;Test public void one() {
23   *       ...
24   *    }
25   *    &#064;Test public void two() {
26   *       ...
27   *    }
28   * }
29   * </pre>
30   * @see org.junit.AfterClass
31   */
32  @Retention  (RetentionPolicy.RUNTIME)
33  @Target  (ElementType.METHOD)
34  public @interface BeforeClass {
35  }
36

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