JUnit中按照顺序执行测试方式

很多情况下，写了一堆的test case，希望某一些test case必须在某个test case之后执行。比如，测试某一个Dao代码，希望添加的case在最前面，然后是修改或者查询，最后才是删除，以前的做法把所有的方法都集中到某一个方法去执行，一个个罗列好，比较麻烦。比较幸福的事情就是JUnit4.11之后提供了MethodSorters，可以有三种方式对test执行顺序进行指定，如下：

/** * Sorts the test methods by the method name, in lexicographic order, with {@link Method#toString()} used as a tiebreaker */ NAME_ASCENDING(MethodSorter.NAME_ASCENDING), /** * Leaves the test methods in the order returned by the JVM. Note that the order from the JVM may vary from run to run */ JVM(null), /** * Sorts the test methods in a deterministic, but not predictable, order */ DEFAULT(MethodSorter.DEFAULT);

可以小试牛刀一下：

使用DEFAULT方式：

package com.netease.test.junit; import org.apache.log4j.Logger; import org.junit.FixMethodOrder; import org.junit.Test; import org.junit.runners.MethodSorters; /** * User: hzwangxx
 * Date: 14-3-31
 * Time: 15:35 */ @FixMethodOrder(MethodSorters.DEFAULT) public class TestOrder { private static final Logger LOG = Logger.getLogger(TestOrder.class);
    @Test public void testFirst() throws Exception {
        LOG.info("------1--------");
    }

    @Test public void testSecond() throws Exception {
        LOG.info("------2--------");

    }

    @Test public void testThird() throws Exception {
        LOG.info("------3--------");
    }

} /* output:
2014-03-31 16:04:15,984 0    [main] INFO  - ------1--------
2014-03-31 16:04:15,986 2    [main] INFO  - ------3--------
2014-03-31 16:04:15,987 3    [main] INFO  - ------2-------- */

换成按字母排序

package com.netease.test.junit; import org.apache.log4j.Logger; import org.junit.FixMethodOrder; import org.junit.Test; import org.junit.runners.MethodSorters; /** * User: hzwangxx
 * Date: 14-3-31
 * Time: 15:35 */ @FixMethodOrder(MethodSorters.NAME_ASCENDING) public class TestOrder { private static final Logger LOG = Logger.getLogger(TestOrder.class);
    @Test public void testFirst() throws Exception {
        LOG.info("------1--------");
    }

    @Test public void testSecond() throws Exception {
        LOG.info("------2--------");

    }

    @Test public void testThird() throws Exception {
        LOG.info("------3--------");
    }

} /* 2014-03-31 16:10:25,360 0    [main] INFO  - ------1--------
2014-03-31 16:10:25,361 1    [main] INFO  - ------2--------
2014-03-31 16:10:25,362 2    [main] INFO  - ------3-------- */