Maven does not find JUnit tests to run

Question

I have a maven program, it compiles fine. When I run mvn test it does not run any tests (under TESTs header says There are no tests to run.).

I've recreated this problem with a super simple setup which I will include below as well as the output when run with -X.

The unit tests run fine from eclipse (both with its default junit package and when I instead include the junit.jar downloaded by maven). Also mvn test-compile correctly creates the class under test-classes. I am running this on OSX 10.6.7 with Maven 3.0.2 and java 1.6.0_24.

Here is the directory structure:

/my_program/pom.xml /my_program/src/main/java/ClassUnderTest.java /my_program/src/test/java/ClassUnderTestTests.java 

pom.xml:

<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">     <modelVersion>4.0.0</modelVersion>     <groupId>my_group</groupId>     <artifactId>my_program</artifactId>     <packaging>jar</packaging>     <version>1.0-SNAPSHOT</version>     <name>My Program</name>     <dependencies>         <dependency>             <groupId>junit</groupId>             <artifactId>junit</artifactId>             <version>4.8.1</version>             <scope>test</scope>         </dependency>     </dependencies>     <build>         <plugins>             <plugin>                 <groupId>org.apache.maven.plugins</groupId>                 <artifactId>maven-compiler-plugin</artifactId>                 <configuration>                     <source>1.5</source>                     <target>1.5</target>                 </configuration>             </plugin>         </plugins>     </build> </project> 

ClassUnderTest.java:

public class ClassUnderTest {      public int functionUnderTest(int n) {         return n;     }  } 

ClassUnderTestTests.java:

import org.junit.Assert; import org.junit.Before; import org.junit.Test;  public class ClassUnderTestTests {      private ClassUnderTest o;      @Before     public void setUp() {         o = new ClassUnderTest();     }      @Test     public void testFunctionUnderTest_testCase1() {         Assert.assertEquals(1, o.functionUnderTest(1));     }      @Test     public void testFunctionUnderTest_testCase2() {         Assert.assertEquals(2, o.functionUnderTest(2));     } } 

End of mvn -X test:

[DEBUG] Configuring mojo org.apache.maven.plugins:maven-surefire-plugin:2.7.1:test from plugin realm ClassRealm[plugin>org.apache.maven.plugins:maven-surefire-plugin:2.7.1, parent: sun.misc.Launcher$AppClassLoader@5224ee] [DEBUG] Configuring mojo 'org.apache.maven.plugins:maven-surefire-plugin:2.7.1:test' with basic configurator --> [DEBUG]   (s) basedir = /Users/aaron/Programs/my_program [DEBUG]   (s) childDelegation = false [DEBUG]   (s) classesDirectory = /Users/aaron/Programs/my_program/target/classes [DEBUG]   (s) disableXmlReport = false [DEBUG]   (s) enableAssertions = true [DEBUG]   (s) forkMode = once [DEBUG]   (s) junitArtifactName = junit:junit [DEBUG]   (s) localRepository =        id: local       url: file:///Users/aaron/.m2/repository/    layout: none  [DEBUG]   (f) parallelMavenExecution = false [DEBUG]   (s) pluginArtifactMap = {org.apache.maven.plugins:maven-surefire-plugin=org.apache.maven.plugins:maven-surefire-plugin:maven-plugin:2.7.1:, org.apache.maven.surefire:surefire-booter=org.apache.maven.surefire:surefire-booter:jar:2.7.1:compile, org.apache.maven.surefire:surefire-api=org.apache.maven.surefire:surefire-api:jar:2.7.1:compile, org.apache.maven.surefire:maven-surefire-common=org.apache.maven.surefire:maven-surefire-common:jar:2.7.1:compile, org.apache.maven.shared:maven-common-artifact-filters=org.apache.maven.shared:maven-common-artifact-filters:jar:1.3:compile, org.codehaus.plexus:plexus-utils=org.codehaus.plexus:plexus-utils:jar:2.0.5:compile, junit:junit=junit:junit:jar:3.8.1:compile, org.apache.maven.reporting:maven-reporting-api=org.apache.maven.reporting:maven-reporting-api:jar:2.0.9:compile} [DEBUG]   (s) printSummary = true [DEBUG]   (s) project = MavenProject: my_group:my_program:1.0-SNAPSHOT @ /Users/aaron/Programs/my_program/pom.xml [DEBUG]   (s) projectArtifactMap = {junit:junit=junit:junit:jar:4.8.1:test} [DEBUG]   (s) redirectTestOutputToFile = false [DEBUG]   (s) remoteRepositories = [       id: central       url: http://repo1.maven.org/maven2    layout: default snapshots: [enabled => false, update => daily]  releases: [enabled => true, update => never] ] [DEBUG]   (s) reportFormat = brief [DEBUG]   (s) reportsDirectory = /Users/aaron/Programs/my_program/target/surefire-reports [DEBUG]   (s) session = org.apache.maven.execution.MavenSession@dfbb43 [DEBUG]   (s) skip = false [DEBUG]   (s) skipTests = false [DEBUG]   (s) testClassesDirectory = /Users/aaron/Programs/my_program/target/test-classes [DEBUG]   (s) testFailureIgnore = false [DEBUG]   (s) testNGArtifactName = org.testng:testng [DEBUG]   (s) testSourceDirectory = /Users/aaron/Programs/my_program/src/test/java [DEBUG]   (s) trimStackTrace = true [DEBUG]   (s) useFile = true [DEBUG]   (s) useManifestOnlyJar = true [DEBUG]   (s) workingDirectory = /Users/aaron/Programs/my_program [DEBUG] -- end configuration -- [INFO] Surefire report directory: /Users/aaron/Programs/my_program/target/surefire-reports [DEBUG] Setting system property [user.dir]=[/Users/aaron/Programs/my_program] [DEBUG] Setting system property [localRepository]=[/Users/aaron/.m2/repository] [DEBUG] Setting system property [basedir]=[/Users/aaron/Programs/my_program] [DEBUG] Using JVM: /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home/bin/java [DEBUG] Using manager EnhancedLocalRepositoryManager with priority 10 for /Users/aaron/.m2/repository [DEBUG] dummy:dummy:jar:1.0 (selected for null) [DEBUG]   org.apache.maven.surefire:surefire-booter:jar:2.7.1:compile (selected for compile) [DEBUG]     org.apache.maven.surefire:surefire-api:jar:2.7.1:compile (selected for compile) [DEBUG] Adding to surefire booter test classpath: /Users/aaron/.m2/repository/org/apache/maven/surefire/surefire-booter/2.7.1/surefire-booter-2.7.1.jar Scope: compile [DEBUG] Adding to surefire booter test classpath: /Users/aaron/.m2/repository/org/apache/maven/surefire/surefire-api/2.7.1/surefire-api-2.7.1.jar Scope: compile [DEBUG] Using manager EnhancedLocalRepositoryManager with priority 10 for /Users/aaron/.m2/repository [DEBUG] dummy:dummy:jar:1.0 (selected for null) [DEBUG]   org.apache.maven.surefire:surefire-junit4:jar:2.7.1:test (selected for test) [DEBUG]     org.apache.maven.surefire:surefire-api:jar:2.7.1:test (selected for test) [DEBUG] Adding to surefire test classpath: /Users/aaron/.m2/repository/org/apache/maven/surefire/surefire-junit4/2.7.1/surefire-junit4-2.7.1.jar Scope: test [DEBUG] Adding to surefire test classpath: /Users/aaron/.m2/repository/org/apache/maven/surefire/surefire-api/2.7.1/surefire-api-2.7.1.jar Scope: test [DEBUG] Test Classpath : [DEBUG]   /Users/aaron/Programs/my_program/target/test-classes [DEBUG]   /Users/aaron/Programs/my_program/target/classes [DEBUG]   /Users/aaron/.m2/repository/junit/junit/4.8.1/junit-4.8.1.jar [DEBUG] Using manager EnhancedLocalRepositoryManager with priority 10 for /Users/aaron/.m2/repository [DEBUG] dummy:dummy:jar:1.0 (selected for null) [DEBUG]   org.apache.maven.surefire:surefire-booter:jar:2.7.1:compile (selected for compile) [DEBUG]     org.apache.maven.surefire:surefire-api:jar:2.7.1:compile (selected for compile) [DEBUG] Adding to surefire booter test classpath: /Users/aaron/.m2/repository/org/apache/maven/surefire/surefire-booter/2.7.1/surefire-booter-2.7.1.jar Scope: compile [DEBUG] Adding to surefire booter test classpath: /Users/aaron/.m2/repository/org/apache/maven/surefire/surefire-api/2.7.1/surefire-api-2.7.1.jar Scope: compile Forking command line: /bin/sh -c cd /Users/aaron/Programs/my_program && /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home/bin/java -jar /Users/aaron/Programs/my_program/target/surefire/surefirebooter6118081963679415631.jar /Users/aaron/Programs/my_program/target/surefire/surefire4887918564882595612tmp /Users/aaron/Programs/my_program/target/surefire/surefire9012255138269731406tmp  -------------------------------------------------------  T E S T S ------------------------------------------------------- There are no tests to run.  Results :  Tests run: 0, Failures: 0, Errors: 0, Skipped: 0  [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 2.089s [INFO] Finished at: Mon May 30 12:03:09 EDT 2011 [INFO] Final Memory: 7M/62M [INFO] ------------------------------------------------------------------------ 

Answer 1

By default Maven uses the following naming conventions when looking for tests to run:

• Test*
• *Test
• *Tests (has been added in Maven Surefire Plugin 2.20)
• *TestCase

If your test class doesn't follow these conventions you should rename it or configure Maven Surefire Plugin to use another pattern for test classes.