Improve dependency scopes

- Gradle projects should use api/implementation/runtimeOnly
- Maven projects should use test scope for test engines

junit5-jupiter-extensions/build.gradle

@@ -1,5 +1,5 @@
 plugins {
-	id 'java'
+	id 'java-library'
 	id 'eclipse' // optional (to generate Eclipse project files)
 	id 'idea' // optional (to generate IntelliJ IDEA project files)
 }
@@ -17,10 +17,10 @@ tasks.withType(JavaCompile) {
 }
 
 dependencies {
-	compile("org.junit.jupiter:junit-jupiter-api:5.4.2") {
+	api("org.junit.jupiter:junit-jupiter-api:5.4.2") {
         because 'building extensions in "main" using JUnit Jupiter API'
     }
-	testRuntime("org.junit.jupiter:junit-jupiter-engine:5.4.2") {
+	testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine:5.4.2") {
         because 'at least one engine is needed at test runtime'
     }
 }

junit5-jupiter-starter-gradle-groovy/build.gradle

@@ -9,7 +9,7 @@ repositories {
 }
 
 dependencies {
-	compile localGroovy()
+	implementation(localGroovy())
 	testImplementation('org.junit.jupiter:junit-jupiter:5.4.2')
 }
 

junit5-migration-gradle/README.md

@@ -26,14 +26,14 @@ Optionally, you can configure the `test` task as follows.
 ```groovy
 test {
 	useJUnitPlatform {
-		// includeEngines 'junit-jupiter', 'junit-vintage'
-		// excludeEngines 'custom-engine'
+		// includeEngines("junit-jupiter", "junit-vintage")
+		// excludeEngines("custom-engine")
 
-		// includeTags 'fast'
-		excludeTags 'slow'
+		// includeTags("fast")
+		excludeTags("slow")
 	}
 	testLogging {
-		events 'passed', 'skipped', 'failed'
+		events("passed", "skipped", "failed")
 	}
 }
 ```
@@ -53,25 +53,25 @@ Gradle will not run tests that are _tagged_ accordingly.
 In order to have Gradle's `test` task run any tests at all, a `TestEngine`
 implementation must be on the classpath.
 
-To configure support for JUnit Jupiter based tests, configure a `testCompile` dependency
-on the JUnit Jupiter API and a `testRuntime` dependency on the JUnit Jupiter TestEngine
-implementation similar to the following.
+To configure support for JUnit Jupiter based tests, configure a `testImplementation`
+dependency on the `junit-jupiter` artifact. That will cause `testImplementation`
+dependency on the JUnit Jupiter API and a `testRuntimeOnly` dependency on the JUnit
+Jupiter TestEngine.
 
 ```groovy
 dependencies {
-	testCompile("org.junit.jupiter:junit-jupiter-api:5.4.2")
-	testRuntime("org.junit.jupiter:junit-jupiter-engine:5.4.2")
+	testImplementation("org.junit.jupiter:junit-jupiter:5.4.2")
 }
 ```
 
 Gradle can also run JUnit 3 and JUnit 4 based tests as long as you
-configure a `testCompile` dependency on JUnit 4 and a `testRuntime` dependency on the
-JUnit Vintage TestEngine implementation similar to the following.
+configure a `testImplementation` dependency on JUnit 4 and a `testRuntimeOnly` dependency
+on the JUnit Vintage TestEngine implementation similar to the following.
 
 ```groovy
 dependencies {
-	testCompile("junit:junit:4.12")
-	testRuntime("org.junit.vintage:junit-vintage-engine:5.4.2")
+	testImplementation("junit:junit:4.12")
+	testRuntimeOnly("org.junit.vintage:junit-vintage-engine:5.4.2")
 }
 ```
 

junit5-migration-gradle/build.gradle

@@ -24,12 +24,12 @@ dependencies {
 	// JUnit Jupiter API and TestEngine implementation
 	testImplementation("org.junit.jupiter:junit-jupiter")
 
-	testCompile("junit:junit:${junit4Version}")
-	testRuntime("org.junit.vintage:junit-vintage-engine") {
+	testImplementation("junit:junit:${junit4Version}")
+	testRuntimeOnly("org.junit.vintage:junit-vintage-engine") {
 		because 'allows JUnit 3 and JUnit 4 tests to run'
 	}
 
-	testRuntime("org.junit.platform:junit-platform-launcher") {
+	testRuntimeOnly("org.junit.platform:junit-platform-launcher") {
 		because 'allows tests to run from IDEs that bundle older version of launcher'
 	}
 }

junit5-migration-maven/pom.xml

@@ -35,11 +35,13 @@
 			<groupId>org.junit.jupiter</groupId>
 			<artifactId>junit-jupiter-engine</artifactId>
 			<version>${junit.jupiter.version}</version>
+			<scope>test</scope>
 		</dependency>
 		<dependency>
 			<groupId>org.junit.vintage</groupId>
 			<artifactId>junit-vintage-engine</artifactId>
 			<version>${junit.vintage.version}</version>
+			<scope>test</scope>
 		</dependency>
 	</dependencies>