我在 spring mvc 和 maven 上有 Web 应用程序。 当我执行“mvn clean install”时，我从一些单一测试中得到了空指针异常。 发生这种情况是因为其中一个资源为空，但为什么呢？
统一测试:
package myapp.services.impl
....
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {"classpath:META-INF/spring/applicationContext.xml"})
@TransactionConfiguration
public class MyServiceImplTest {
@Resource
private MyService myService;
@Transactional
@Test
public void someTest() {
SomeEntity entity = new SomeEntity();
myService.createSomething(entity); // THROW - NullPointerException, myService is NULL
...
}
}
pom.xml中的surefire插件:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.4.3</version>
<configuration>
<systemProperties>
<property>
<name>myapp.env</name>
<value>test</value>
</property>
</systemProperties>
<junitArtifactName>org.junit:com.springsource.org.junit</junitArtifactName>
</configuration>
</plugin>
和applicationContext.xml:
...
<context:component-scan base-package="myapp.services,myapp.services.impl"/>
<context:property-placeholder location="classpath*:META-INF/spring/common_${myapp.env}.properties"
system-properties-mode="OVERRIDE"
ignore-resource-not-found="true"/>
....
PS:当我在 eclipse Run as JUnit Test 中执行此测试时 - 执行没有异常
万无一失的报告后的堆栈跟踪:
<小时/>测试集:myapp.services.impl.MyServiceImplTest
测试运行:1，失败:1，错误:0，跳过:0，已用时间:1.115 秒 <<< 失败! myapp.services.impl.MyServiceImplTest.someTest() 已用时间:1.068 秒 <<< 失败! java.lang.NullPointerException 在 myapp.services.impl.MyServiceImplTest.someTest(MyServiceImplTest.java:42)
MAVEN 输出:
...
[INFO] --- maven-surefire-plugin:2.4.3:test (default-test) @ mywebapp ---
[INFO] Surefire report directory: /home/xxx/Work/mywebapp/target/surefire-reports
-------------------------------------------------------
T E S T S
-------------------------------------------------------
Running myapp.services.impl.MyServiceImplTest
log4j:WARN No such property [maxFileSize] in org.apache.log4j.DailyRollingFileAppender.
log4j:WARN No such property [maxBackupIndex] in org.apache.log4j.DailyRollingFileAppender.
Tests run: 1, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 0.919 sec <<< FAILURE!
Results :
Failed tests:
myapp.services.impl.MyServiceImplTest.someTest()
Tests run: 1, Failures: 1, Errors: 0, Skipped: 0
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 41.465s
[INFO] Finished at: Mon May 09 00:05:06 MSD 2011
[INFO] Final Memory: 26M/70M
...
最佳答案
只是一个想法，但是...
您说您已将 applicationContext.xml 放在 test/resources 文件夹中 - 您是否重新创建了在该目录中定义的目录结构？ IE。测试/资源/META-INF/spring/applicationcontext.xml？如果没有，那么 applicationcontext 将出现在 test-classes/中，并且不会根据您定义的类路径位置找到...如果它只是在 test/resources 中，请将 @ContextConfiguration 注释更改为
@ContextConfiguration(locations = {"classpath:applicationContext.xml"})`
`
关于java - 不要在 uni-test 中启动 spring 上下文，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/5929621/