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Surefire is not picking up Junit 4 tests

由 大憨熊 提交于 2019-12-28 03:45:10

问题


For some reason I cannot get Maven 2 Surefire plugin to execute JUnit 4 test class.

public class SimpleTest {
  @org.junit.Test
  public void simple() {
     System.out.println("foo");
  }
}

However if I change this class to be JUnit-3 like, such as 

public class SimpleTest extends junit.framework.TestCase {
  public void testBar() {
     System.out.println("bar");
  }

  @org.junit.Test
  public void simple() {
     System.out.println("foo");
  }
}

then it gets executed. Here's what I've done:

  • verified Maven version: Apache Maven 2.2.1 (r801777; 2009-08-06 20:16:01+0100)
  • verified Surefire version: followed this advice
  • verified Surefire version: checked Surefire jars in my ~/.m2/repository/org/apache/maven/surefire -- all of them are either version 2.4.2 or 2.4.3
  • done a mvn dependency:tree | grep junit to ensure I only depend on junit version 4.7

The module I am having this problem at doesn't have JUnit 3 tests.

Is there anything else I am missing?


回答1:


mvn -X helped me to reveal the following:

...
[INFO] [surefire:test {execution: default-test}]
[DEBUG] dummy:dummy:jar:1.0 (selected for null)
[DEBUG]   org.apache.maven.surefire:surefire-booter:jar:2.4.3:runtime (selected for runtime)
[DEBUG]     org.apache.maven.surefire:surefire-api:jar:2.4.3:runtime (selected for runtime)
[DEBUG] Adding to surefire booter test classpath: /home/mindas/.m2/repository/org/apache/maven/surefire/surefire-booter/2.4.3/surefire-booter-2.4.3.jar
[DEBUG] Adding to surefire booter test classpath: /home/mindas/.m2/repository/org/apache/maven/surefire/surefire-api/2.4.3/surefire-api-2.4.3.jar
[DEBUG] dummy:dummy:jar:1.0 (selected for null)
[DEBUG]   org.testng:testng:jar:jdk15:5.8:test (selected for test)
[DEBUG]     junit:junit:jar:3.8.1:test (selected for test)
[DEBUG] Adding to surefire booter test classpath: /home/mindas/.m2/repository/org/testng/testng/5.8/testng-5.8-jdk15.jar
[DEBUG] Adding to surefire booter test classpath: /home/mindas/.m2/repository/junit/junit/3.8.1/junit-3.8.1.jar
[DEBUG] dummy:dummy:jar:1.0 (selected for null)
[DEBUG] Retrieving parent-POM: org.apache.maven.surefire:surefire-providers:pom:2.4.3 for project: null:surefire-testng:jar:null from the repository.
[DEBUG] Adding managed dependencies for unknown:surefire-testng
[DEBUG]   org.apache.maven.surefire:surefire-api:jar:2.4.3
[DEBUG]   org.apache.maven.surefire:surefire-booter:jar:2.4.3
[DEBUG]   org.codehaus.plexus:plexus-utils:jar:1.5.1
[DEBUG]   org.apache.maven.surefire:surefire-testng:jar:2.4.3:test (selected for test)
[DEBUG]     org.apache.maven:maven-artifact:jar:2.0:test (selected for test)
[DEBUG]       org.codehaus.plexus:plexus-utils:jar:1.0.4:test (selected for test)
[DEBUG]     junit:junit:jar:3.8.1:test (selected for test)
[DEBUG]     org.testng:testng:jar:jdk15:5.7:test (selected for test)
[DEBUG]     org.apache.maven.surefire:surefire-api:jar:2.4.3:test (selected for test)
...
[DEBUG] Test Classpath :
...
[DEBUG]   /home/mindas/.m2/repository/junit/junit/4.7/junit-4.7.jar

So it seems that the problem was coming from testng jar requiring JUnit v3.8.1. Even though Test Classpath was set to depend on JUnit 4, it was too late.

testng dependency was located in my POM:

<dependency>
  <groupId>org.testng</groupId>
  <artifactId>testng</artifactId>
  <version>5.8</version>
  <scope>test</scope>
  <classifier>jdk15</classifier>
</dependency>

Immediately after I have commented it out, tests started to execute.

Lessons learned:

  • mvn dependency:tree is not always enough, mvn -X is a friend.
  • surefire is not made for developer heaven (I have realized this while looking at project JIRA reports). This is especially true as there are no other alternatives if you use Maven.

Thanks everybody for your help. Unfortunately there is no way to split answer points between Pascal and Kaleb, but Kaleb's advice to use mvn -X helped me to get on the right track so correct answer points go to him.




回答2:


The Surefire plugin figures out which JUnit provider should be used based upon the classpath. If there are multiple JUnit versions on the classpath, you can either correct the classpath to have only one JUnit version on the classpath (as discussed above), or you can explicitly specify which provider you want to use. For example, specifying the following in your (parent) POM forces using the newest provider (e.g., "surefire-junit47"):

[...]
<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-surefire-plugin</artifactId>
  <version>2.8</version>
  <dependencies>
    <!-- Force using the latest JUnit 47 provider -->
    <dependency>
      <groupId>org.apache.maven.surefire</groupId>
      <artifactId>surefire-junit47</artifactId>
      <version>2.8</version>
    </dependency>
  </dependencies>
[...]

Note however that Surefire 2.7 changed the way it's determining which unit test classes are run. The new behavior when using Surefire 2.7 (or later) with JUnit 4 is that any test without a @Test annotation will be skipped automatically. This may be great if you just have JUnit 4 unit tests, but if you have a combination of JUnit 3 and 4 unit tests, using the "surefire-junit47" provider will not work correctly. In such cases, its best to explicitly choose the "surefire-junit4" provider:

[...]
<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-surefire-plugin</artifactId>
  <version>2.8</version>
  <dependencies>
    <dependency>
      <groupId>org.apache.maven.surefire</groupId>
      <!-- Use the older JUnit 4 provider -->
      <artifactId>surefire-junit4</artifactId>
      <version>2.8</version>
    </dependency>
  </dependencies>
[...]



回答3:


I don't know what you mean by "can't execute," but does it help to explicitly set the includes used by the maven-surefire-plugin?

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-surefire-plugin</artifactId>
    <version>2.4.3</version>
    <configuration>
        <includes>
            <include>**/*Test.java</include>
        </includes>
    </configuration>
</plugin>

Also, does running maven with the -X flag provide any useful information?




回答4:


One more possible cause can be this bug (closed with "Won't fix"): https://issues.apache.org/jira/browse/SUREFIRE-587

Short summary: Tests extending TestCase (but not using annotations) will not be picked up if their name does not end with "Test".




回答5:


For some poor soul out there who is wondering why Maven doesn't pick up JUnit tests.

I have both JUnit and TestNG as dependecies. But I want failsafe to run my functional tests using TestNG and surefire to run my unit tests using JUnit.

However, I found that surefire was attempting to run my unit tests using TestNG and found nothing to run. My JUnit tests were skipped.

Later I came across this Maven issue and configured surefire to run only "JUnit" tests like this:

<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
  <configuration>
    <properties>
      <property>
        <name>junit</name>
        <value>true</value>
      </property>
    </properties>
  </configuration>
</plugin>

Hope this helps someone.




回答6:


For the benefit of Googlers, when I had this issue it was because I'd included a PowerMock dependency that pulled in TestNG, causing no [TestNG] tests to be detected by SureFire.

I used the m2eclipse "Dependency Hierarchy" tab of the POM editor to find the dependency and right-clicked to generate an exclusion (see XML below).

For completeness (and for those not using m2eclipse) here's the XML that excludes the dependency - I only came across this feature of Maven by seeing these tags generated automatically: 

<dependency>
  <groupId>org.powermock</groupId>
  <artifactId>powermock-mockito-release-full</artifactId>
  <version>1.4.9</version>
  <classifier>full</classifier>
  <exclusions>
    <exclusion>
      <artifactId>powermock-module-testng</artifactId>
      <groupId>org.powermock</groupId>
    </exclusion>
  </exclusions>
</dependency>

(In my case, excluding "powermock-module-testng" was sufficient, but you could exclude TestNG directly if it's coming in from somewhere else.)




回答7:


The verification that you've done are good, especially checking that you are using version 2.3+ of the surefire plugin (by default, you'll get version 2.4.3 with maven 2.1 super POM so this should be ok) and checking that you not pulling the junit-3.8.1.jar dependency transitively.

Now, just to validated that this is not a "global problem" (I don't think so TBH), could you create a project from scratch, for example by running: 

mvn archetype:create -DgroupId=com.mycompany.app -DartifactId=maven-junit4-testcase

Then update the junit dependency:

<dependency>
  <groupId>junit</groupId>
  <artifactId>junit</artifactId>
  <version>4.7</version>
  <scope>test</scope>
</dependency>

And configure the compiler level for 1.5+

<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-compiler-plugin</artifactId>
  <configuration>
    <source>1.5</source>
    <target>1.5</target>
  </configuration>
</plugin>

Finally put your SimpleTest.java next to AppTest.java and run mvn test.

If running mvn test works fine for that project (and I'm expecting it to run without problem), could you please update your question with the POM configuration you're using (from the project having troubles)?




回答8:


One small change helped me Funnily!!!

I changed the class name from MyClassTest to TestMyClass, I got this idea after veryfing my parent POM.xml contains below line

<test.include.pattern> **/Test*.java <test.include.pattern/>



回答9:


1.) Include following surefire plugin in pom.xml

<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.20</version>
<configuration>
</configuration>
</plugin>

2.)By default surefire plugin picks Test class from package :- src/test/java/....

So go to Build Path and include test folder in classpath like below :

3.) Go to --> Run As -->Maven Test

[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.081 
s - in com.bnym.dcm.api.controller.AccountControllerTest
[INFO] Running com.bnym.dcm.api.controller.DCMApiControllerTest
[INFO] Tests run: 6, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0 s - 
in com.bnym.dcm.api.controller.DCMApiControllerTest
[INFO] 
[INFO] Results:
[INFO] 
[INFO] Tests run: 7, Failures: 0, Errors: 0, Skipped: 0
[INFO] 
[INFO] ----------------------------------------------------------------------
--
[INFO] BUILD SUCCESS



回答10:


Had a similar issue when trying to run integration tests. I had an old version of the surefire plugin which was trying to run TestNG and not jUnit. I changed the version number in the pom to 2.20 and it worked.




回答11:


Have you configured your maven-compile-plugin for the correct compiler level, like:

<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-compiler-plugin</artifactId>
  <configuration>
    <source>1.5</source>
    <target>1.5</target>
  </configuration>
</plugin>

Otherwise maven will have trouble with annotations



来源：https://stackoverflow.com/questions/2021771/surefire-is-not-picking-up-junit-4-tests

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