Maven does not find JUnit tests to run

Java

Encountering the irritating “Maven not uncovering JUnit checks” mistake tin carry your improvement workflow to a screeching halt. This content, often encountered by Java builders utilizing Maven arsenic their physique implement, tin stem from a assortment of configuration mishaps, dependency conflicts, oregon equal elemental oversights. Knowing the underlying causes and implementing the accurate options is important for sustaining a creaseless and businesslike improvement procedure. This usher volition delve into the communal causes wherefore Maven mightiness neglect to observe your JUnit checks and supply actionable steps to resoluteness them, getting your physique backmost connected path.

Surefire Plugin Configuration

The about communal wrongdoer down Maven’s incapacity to find JUnit exams lies inside the Surefire plugin configuration. This plugin is liable for executing checks inside the Maven lifecycle. Incorrect oregon lacking configuration inside the pom.xml record tin forestall the plugin from discovering and moving your exams. Guarantee that the plugin is accurately declared and configured to see your trial origin listing.

For illustration, if your exams reside inside a non-modular listing, you demand to explicitly specify this determination inside the plugin configuration. Failing to bash truthful volition pb to the “Nary assessments recovered” mistake, equal if your exams are accurately written and structured. Treble-cheque that the contains parameter inside the plugin configuration factors to the accurate determination of your trial lessons, usually src/trial/java//.java.

Moreover, confirm the plugin’s dependency connected the accurate JUnit interpretation. A mismatch betwixt the JUnit interpretation utilized successful your checks and the interpretation declared successful the Surefire plugin tin besides lend to this content. Support your dependencies ahead-to-day and guarantee consistency betwixt your task’s JUnit interpretation and the 1 specified successful the Surefire plugin configuration.

Dependency Conflicts and JUnit Interpretation

Conflicting dependencies inside your task tin besides pb to Maven overlooking your JUnit assessments. Antithetic variations of JUnit, oregon equal dependencies that not directly impact JUnit’s performance, tin origin surprising behaviour and forestall trial execution. Cautiously analyse your task’s dependency actor utilizing the mvn dependency:actor bid to place immoderate possible conflicts.

Resolving these conflicts frequently entails explicitly excluding conflicting dependencies oregon forcing the usage of a circumstantial interpretation. This ensures that Maven makes use of the accurate JUnit interpretation and avoids immoderate interference from conflicting libraries. Sustaining a cleanable and fine-managed dependency actor is indispensable for stopping a broad scope of physique points, together with the “nary assessments recovered” job.

See utilizing a dependency direction implement to streamline this procedure. Instruments similar Maven’s constructed-successful dependency direction options oregon outer plugins tin aid place and resoluteness conflicts much effectively, guaranteeing your task’s dependencies are ever successful sync.

Incorrect Trial People Naming and Placement

Piece seemingly trivial, incorrect naming oregon placement of your trial courses tin besides forestall Maven from recognizing them. Guarantee that your trial courses travel the modular naming normal, sometimes ending with “Trial” (e.g., MyClassTest.java), and that they reside inside the designated trial origin listing (src/trial/java). Deviating from these conventions tin confuse Maven and pb to the “nary checks recovered” content.

Moreover, treble-cheque that your trial strategies are accurately annotated with @Trial. This annotation alerts to JUnit that these strategies ought to beryllium executed arsenic checks. Forgetting this annotation tin render your trial strategies invisible to the trial runner, ensuing successful the irritating “nary checks recovered” communication.

Beryllium aware of nested courses. If your trial courses are nested inside another lessons, guarantee they are declared arsenic static. Non-static nested lessons tin generally origin points with trial find, truthful making them static tin aid resoluteness these issues.

Compiler Errors and Physique Points

Generally, underlying compiler errors oregon physique points tin not directly forestall Maven from uncovering and moving exams. If your task fails to compile accurately, the trial form of the Maven lifecycle mightiness beryllium skipped altogether. Totally examine the physique logs for immoderate compilation errors oregon warnings and code them promptly. Equal seemingly insignificant points tin cascade and contact consequent physique steps, together with trial execution.

Brand certain your task’s physique way is accurately configured. Incorrect physique way settings tin forestall the compiler from uncovering essential courses, together with JUnit itself. This tin pb to compilation failures and finally forestall Maven from moving your assessments.

Cleanable your task commonly utilizing mvn cleanable. This removes immoderate stale physique artifacts that mightiness intervene with the physique procedure. A cleanable physique ensures that Maven begins from scratch and tin aid place and resoluteness immoderate lingering physique issues that mightiness beryllium masking the existent content.

  • Confirm accurate Surefire plugin configuration.
  • Resoluteness dependency conflicts.
  1. Cheque trial people naming conventions.
  2. Confirm @Trial annotations.
  3. Examine physique logs for errors.

Featured Snippet: The about communal ground for Maven not uncovering JUnit assessments is incorrect Surefire plugin configuration successful your pom.xml. Guarantee the plugin is decently declared and consists of the accurate trial origin listing.

[Infographic Placeholder: Visualizing communal causes and options for Maven not uncovering JUnit checks]

Research additional accusation connected Maven Surefire Plugin, JUnit 5, and Maven Investigating Champion Practices.

Cheque retired our associated station connected Troubleshooting Maven Physique Points for much debugging methods.

FAQ

Q: My exams are successful a antithetic listing. However bash I configure the Surefire plugin?

A: Replace the contains parameter successful the Surefire configuration inside your pom.xml to component to the accurate listing containing your trial courses.

By addressing these communal pitfalls, you tin efficaciously troubleshoot and resoluteness the “Maven not uncovering JUnit exams” mistake, permitting you to resume your improvement workflow with minimal disruption. Retrieve to meticulously cheque your configurations, dependencies, and trial people constructions to pinpoint the base origin and instrumentality the due resolution. A fine-configured Maven task is cardinal to a creaseless and businesslike improvement procedure. Dive deeper into these matters and research the linked sources to addition a blanket knowing of Maven and JUnit integration champion practices. This proactive attack volition not lone resoluteness actual points however besides forestall early occurrences, contributing to a much strong and dependable physique procedure.

Question & Answer :
I person a maven programme, it compiles good. Once I tally mvn trial it does not tally immoderate exams (nether Checks header says Location are nary exams to tally.).

I’ve recreated this job with a ace elemental setup which I volition see beneath arsenic fine arsenic the output once tally with -X.

The part checks tally good from eclipse (some with its default junit bundle and once I alternatively see the junit.jar downloaded by maven). Besides mvn trial-compile appropriately creates the people nether trial-lessons. I americium moving this connected OSX 10.6.7 with Maven three.zero.2 and java 1.6.0_24.

Present is the listing construction:

/my_program/pom.xml /my_program/src/chief/java/ClassUnderTest.java /my_program/src/trial/java/ClassUnderTestTests.java

pom.xml:

<?xml interpretation="1.zero" encoding="UTF-eight"?> <task xmlns="http://maven.apache.org/POM/four.zero.zero" xmlns:xsi="http://www.w3.org/2001/XMLSchema-case" xsi:schemaLocation="http://maven.apache.org/POM/four.zero.zero http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>four.zero.zero</modelVersion> <groupId>my_group</groupId> <artifactId>my_program</artifactId> <packaging>jar</packaging> <interpretation>1.zero-SNAPSHOT</interpretation> <sanction>My Programme</sanction> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <interpretation>four.eight.1</interpretation> <range>trial</range> </dependency> </dependencies> <physique> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <origin>1.5</origin> <mark>1.5</mark> </configuration> </plugin> </plugins> </physique> </task>

ClassUnderTest.java:

national people ClassUnderTest { national int functionUnderTest(int n) { instrument n; } }

ClassUnderTestTests.java:

import org.junit.Asseverate; import org.junit.Earlier; import org.junit.Trial; national people ClassUnderTestTests { backstage ClassUnderTest o; @Earlier national void setUp() { o = fresh ClassUnderTest(); } @Trial national void testFunctionUnderTest_testCase1() { Asseverate.assertEquals(1, o.functionUnderTest(1)); } @Trial national void testFunctionUnderTest_testCase2() { Asseverate.assertEquals(2, o.functionUnderTest(2)); } }

Extremity of mvn -X trial:

[DEBUG] Configuring mojo org.apache.maven.plugins:maven-surefire-plugin:2.7.1:trial from plugin realm ClassRealm[plugin>org.apache.maven.plugins:maven-surefire-plugin:2.7.1, genitor: star.misc.Launcher$AppClassLoader@5224ee] [DEBUG] Configuring mojo 'org.apache.maven.plugins:maven-surefire-plugin:2.7.1:trial' with basal configurator --> [DEBUG] (s) basedir = /Customers/aaron/Applications/my_program [DEBUG] (s) childDelegation = mendacious [DEBUG] (s) classesDirectory = /Customers/aaron/Applications/my_program/mark/courses [DEBUG] (s) disableXmlReport = mendacious [DEBUG] (s) enableAssertions = actual [DEBUG] (s) forkMode = erstwhile [DEBUG] (s) junitArtifactName = junit:junit [DEBUG] (s) localRepository = id: section url: record:///Customers/aaron/.m2/repository/ format: no [DEBUG] (f) parallelMavenExecution = mendacious [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-communal=org.apache.maven.surefire:maven-surefire-communal:jar:2.7.1:compile, org.apache.maven.shared:maven-communal-artifact-filters=org.apache.maven.shared:maven-communal-artifact-filters:jar:1.three:compile, org.codehaus.plexus:plexus-utils=org.codehaus.plexus:plexus-utils:jar:2.zero.5:compile, junit:junit=junit:junit:jar:three.eight.1:compile, org.apache.maven.reporting:maven-reporting-api=org.apache.maven.reporting:maven-reporting-api:jar:2.zero.9:compile} [DEBUG] (s) printSummary = actual [DEBUG] (s) task = MavenProject: my_group:my_program:1.zero-SNAPSHOT @ /Customers/aaron/Packages/my_program/pom.xml [DEBUG] (s) projectArtifactMap = {junit:junit=junit:junit:jar:four.eight.1:trial} [DEBUG] (s) redirectTestOutputToFile = mendacious [DEBUG] (s) remoteRepositories = [ id: cardinal url: http://repo1.maven.org/maven2 format: default snapshots: [enabled => mendacious, replace => regular] releases: [enabled => actual, replace => ne\'er] ] [DEBUG] (s) reportFormat = little [DEBUG] (s) reportsDirectory = /Customers/aaron/Packages/my_program/mark/surefire-stories [DEBUG] (s) conference = org.apache.maven.execution.MavenSession@dfbb43 [DEBUG] (s) skip = mendacious [DEBUG] (s) skipTests = mendacious [DEBUG] (s) testClassesDirectory = /Customers/aaron/Applications/my_program/mark/trial-courses [DEBUG] (s) testFailureIgnore = mendacious [DEBUG] (s) testNGArtifactName = org.testng:testng [DEBUG] (s) testSourceDirectory = /Customers/aaron/Packages/my_program/src/trial/java [DEBUG] (s) trimStackTrace = actual [DEBUG] (s) useFile = actual [DEBUG] (s) useManifestOnlyJar = actual [DEBUG] (s) workingDirectory = /Customers/aaron/Applications/my_program [DEBUG] -- extremity configuration -- [Data] Surefire study listing: /Customers/aaron/Packages/my_program/mark/surefire-stories [DEBUG] Mounting scheme place [person.dir]=[/Customers/aaron/Packages/my_program] [DEBUG] Mounting scheme place [localRepository]=[/Customers/aaron/.m2/repository] [DEBUG] Mounting scheme place [basedir]=[/Customers/aaron/Packages/my_program] [DEBUG] Utilizing JVM: /Scheme/Room/Java/JavaVirtualMachines/1.6.zero.jdk/Contents/Location/bin/java [DEBUG] Utilizing director EnhancedLocalRepositoryManager with precedence 10 for /Customers/aaron/.m2/repository [DEBUG] dummy:dummy:jar:1.zero (chosen for null) [DEBUG] org.apache.maven.surefire:surefire-booter:jar:2.7.1:compile (chosen for compile) [DEBUG] org.apache.maven.surefire:surefire-api:jar:2.7.1:compile (chosen for compile) [DEBUG] Including to surefire booter trial classpath: /Customers/aaron/.m2/repository/org/apache/maven/surefire/surefire-booter/2.7.1/surefire-booter-2.7.1.jar Range: compile [DEBUG] Including to surefire booter trial classpath: /Customers/aaron/.m2/repository/org/apache/maven/surefire/surefire-api/2.7.1/surefire-api-2.7.1.jar Range: compile [DEBUG] Utilizing director EnhancedLocalRepositoryManager with precedence 10 for /Customers/aaron/.m2/repository [DEBUG] dummy:dummy:jar:1.zero (chosen for null) [DEBUG] org.apache.maven.surefire:surefire-junit4:jar:2.7.1:trial (chosen for trial) [DEBUG] org.apache.maven.surefire:surefire-api:jar:2.7.1:trial (chosen for trial) [DEBUG] Including to surefire trial classpath: /Customers/aaron/.m2/repository/org/apache/maven/surefire/surefire-junit4/2.7.1/surefire-junit4-2.7.1.jar Range: trial [DEBUG] Including to surefire trial classpath: /Customers/aaron/.m2/repository/org/apache/maven/surefire/surefire-api/2.7.1/surefire-api-2.7.1.jar Range: trial [DEBUG] Trial Classpath : [DEBUG] /Customers/aaron/Applications/my_program/mark/trial-lessons [DEBUG] /Customers/aaron/Applications/my_program/mark/courses [DEBUG] /Customers/aaron/.m2/repository/junit/junit/four.eight.1/junit-four.eight.1.jar [DEBUG] Utilizing director EnhancedLocalRepositoryManager with precedence 10 for /Customers/aaron/.m2/repository [DEBUG] dummy:dummy:jar:1.zero (chosen for null) [DEBUG] org.apache.maven.surefire:surefire-booter:jar:2.7.1:compile (chosen for compile) [DEBUG] org.apache.maven.surefire:surefire-api:jar:2.7.1:compile (chosen for compile) [DEBUG] Including to surefire booter trial classpath: /Customers/aaron/.m2/repository/org/apache/maven/surefire/surefire-booter/2.7.1/surefire-booter-2.7.1.jar Range: compile [DEBUG] Including to surefire booter trial classpath: /Customers/aaron/.m2/repository/org/apache/maven/surefire/surefire-api/2.7.1/surefire-api-2.7.1.jar Range: compile Forking bid formation: /bin/sh -c cd /Customers/aaron/Packages/my_program && /Scheme/Room/Java/JavaVirtualMachines/1.6.zero.jdk/Contents/Location/bin/java -jar /Customers/aaron/Applications/my_program/mark/surefire/surefirebooter6118081963679415631.jar /Customers/aaron/Packages/my_program/mark/surefire/surefire4887918564882595612tmp /Customers/aaron/Applications/my_program/mark/surefire/surefire9012255138269731406tmp ------------------------------------------------------- T E S T S ------------------------------------------------------- Location are nary exams to tally. Outcomes : Assessments tally: zero, Failures: zero, Errors: zero, Skipped: zero [Information] ------------------------------------------------------------------------ [Data] Physique Occurrence [Data] ------------------------------------------------------------------------ [Information] Entire clip: 2.089s [Data] Completed astatine: Mon Whitethorn 30 12:03:09 EDT 2011 [Information] Last Representation: 7M/62M [Data] ------------------------------------------------------------------------

By default Maven makes use of the pursuing naming conventions once wanting for exams to tally:

If your trial people doesn’t travel these conventions you ought to rename it oregon configure Maven Surefire Plugin to usage different form for trial courses.