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Setting up for JVM

Gradle

Gradle 4.7 is recommended as it added a built-in support for JUnit Platform.

// setup dependencies
dependencies {
    // some version of Kotlin
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"

    testImplementation "org.spekframework.spek2:spek-dsl-jvm:$spek_version"
    testRuntimeOnly "org.spekframework.spek2:spek-runner-junit5:$spek_version"

    // spek requires kotlin-reflect, can be omitted if already in the classpath
    testRuntimeOnly "org.jetbrains.kotlin:kotlin-reflect:$kotlin_version"
}

// setup the test task
test {
    useJUnitPlatform {
        includeEngines 'spek2'
    }
}

Maven

The JUnit Team has provided a basic plugin to run JUnit Platform tests in Maven. You can also check the maven sample in the main repository.

Requirements

Please use Maven Surefire 2.22.0 with the junit-platform-surefire-provider.

...
<build>
    <plugins>
        ...
        <plugin>
            <artifactId>maven-surefire-plugin</artifactId>
            <version>2.22.0</version>
        </plugin>
    </plugins>
</build>
...
<repositories>
    <repository>
        <id>spek-dev</id>
        <url>https://dl.bintray.com/spekframework/spek-dev</url>
    </repository>
</repositories>
<dependencies>
    ...
    <dependency>
        <groupId>org.jetbrains.kotlin</groupId>
        <artifactId>kotlin-stdlib-jdk8</artifactId>
        <version>${kotlin.version}</version>
        <scope>compile</scope>
    </dependency>
    <dependency>
        <groupId>org.spekframework.spek2</groupId>
        <artifactId>spek-dsl-jvm</artifactId>
        <version>${spek_version}</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.spekframework.spek2</groupId>
        <artifactId>spek-runner-junit5</artifactId>
        <version>${spek_version}</version>
    </dependency>
    <dependency>
        <groupId>org.jetbrains.kotlin</groupId>
        <artifactId>kotlin-reflect</artifactId>
        <version>${kotlin.version}</version>
        <scope>test</scope>
    </dependency>
</dependencies>
...

Running tests

See Running tests.