Junit5 with IntelliJ and Gradle

Question

Trying to migrate my project to java8 + Junit5 using IntelliJ 2017.2

I have added junit-jupiter-api version 5.0.0-M6

and junit-platform-launcher version 1.0.0-M6

Project structure is a default maven convention src/test/java

Found a couple articles about this but none of them did solve my issue.

It runs nicely in a console, I presume this is something to do with the IntelliJ default JUnit Runner, or I am missing some dependencies?

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When I Run a single test class all works fine but when I select the directory and Run all 'Tests' in Java like I used to do then I encounter few errors.

WARNING: TestEngine with ID 'junit-jupiter' failed to discover tests
java.lang.NoSuchMethodError: org.junit.platform.engine.TestDescriptor.pruneTree()V

Aug 02, 2017 2:44:56 PM org.junit.platform.launcher.core.DefaultLauncher handleThrowable
WARNING: TestEngine with ID 'junit-vintage' failed to discover tests
java.lang.NoSuchMethodError: org.junit.platform.engine.EngineDiscoveryRequest.getDiscoveryFiltersByType(Ljava/lang/Class;)Ljava/util/List;

Aug 02, 2017 2:44:56 PM org.junit.platform.launcher.core.DefaultLauncher handleThrowable
WARNING: TestEngine with ID 'junit-jupiter' failed to discover tests
java.lang.NoSuchMethodError: org.junit.platform.engine.TestDescriptor.pruneTree()V

Aug 02, 2017 2:44:56 PM org.junit.platform.launcher.core.DefaultLauncher handleThrowable
WARNING: TestEngine with ID 'junit-vintage' failed to discover tests
java.lang.NoSuchMethodError: org.junit.platform.engine.EngineDiscoveryRequest.getDiscoveryFiltersByType(Ljava/lang/Class;)Ljava/util/List;

Note: I have not migrated any tests yet, all are Junit 4 syntax.

Answer 1

Adding specific dependencies solve the problem.

NOTE: UPDATE INTELLIJ ABOVE 2017.2.0 AS THERE WAS A BUG WITH THE JUNIT LAUNCHER

OXYGEN if you using eclipse.

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Below dependency enables Junit5 parametrized tests which can be used instead of a DataProvider.

"org.junit.jupiter:junit-jupiter-params:5.0.0"
//for JUnit5 parametrized tests.

---

Junit5 API.

"org.junit.jupiter:junit-jupiter-api:5.0.0"
//JUnit5 API

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Needed if you want to run legacy JUnit4 tests without changing the syntax and imports.

"org.junit.vintage:junit-vintage-engine:4:12.0"
//for legacy JUnit4 tests

EDIT: 07/2018 Match the version of the vintage runner to the jupiter version

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Needed if you want to run JUnit5 tests with new syntax and imports.

"org.junit.jupiter:junit-jupiter-engine:5.0.0"
//for JUnit5 tests

java.lang.NoSuchMethodError: org.junit.platform.engine.EngineDiscoveryRequest.getDiscoveryFiltersByType(Ljava/lang/Class;)Ljava/util/List;

---

Launcher.

"org.junit.platform:junit-platform-launcher:1.0.0
//to handle default launcher

Exception in thread "main" java.lang.NoSuchMethodError: org.junit.platform.commons.util.ReflectionUtils.getDefaultClassLoader()Ljava/lang/ClassLoader;

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Additional info how to install JUnit5

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Since version 4.6 for Gradle, there is no need for plugins anymore Gradle supports Junit5 natively just do: And the version of the vintage runner is now same as the JUnit 5 version.

dependencies {

    testImplementation "org.junit.jupiter:junit-jupiter-params:$junitVersion"
    testImplementation "org.junit.jupiter:junit-jupiter-api:$junitVersion"

    testRuntimeOnly "org.junit.vintage:junit-vintage-engine:$junitVersion"
    testRuntimeOnly "org.junit.jupiter:junit-jupiter-engine:$junitVersion"
}

test {  
    useJUnitPlatform {
        includeEngines 'junit-jupiter', 'junit-vintage'
    }
}