不要在单测试中启动 spring 上下文
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?
Uni-test:
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中执行此测试时,作为JUnit测试运行 - 执行没有异常,
surefire报告后的堆栈跟踪:
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
...
I have web application on spring mvc and maven.
When I execute "mvn clean install" I got nullpointerexception from some uni-test.
It's happens because one of resource is null, but why ?
Uni-test:
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
...
}
}
surefire plugin in pom.xml:
<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>
And 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: When I execute this test in eclipse Run as JUnit Test - execute is fine without exception
Stack-trace after surefire report:
Test set: myapp.services.impl.MyServiceImplTest
Tests run: 1, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 1.115 sec <<< FAILURE!
myapp.services.impl.MyServiceImplTest.someTest() Time elapsed: 1.068 sec <<< FAILURE!
java.lang.NullPointerException
at myapp.services.impl.MyServiceImplTest.someTest(MyServiceImplTest.java:42)
MAVEN OUTPUT:
...
[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
...
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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?即测试/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
`
Just a thought but...
You say you've placed applicationContext.xml in the test/resources folder - have you recreated the directory structure you define within that directory? I.e. test/resources/META-INF/spring/applicationcontext.xml? If not, then the applicationcontext will appear in test-classes/ and won't be found according to the classpath location you've defined... If it's just in test/resources, change your @ContextConfiguration annotation to
`