====

[[using_junit5]]
== Using JUnit 5

http://junit.org/junit5[JUnit 5] is the latest version of the well-known JUnit test framework.
Unlike its predecessor, JUnit 5 is modularized and composed of several modules:

    JUnit 5 = JUnit Platform + JUnit Jupiter + JUnit Vintage

${fileComment.multilineComment}${packageDecl.statement}
import org.junit.jupiter.api.Test

import org.junit.jupiter.api.Assertions.assertEquals

class MessageUtilsTest {
    @Test def testGetMessage(): Unit = {
        assertEquals("Hello      World!", MessageUtils.getMessage())
    }

package org.gradle.sample

import org.junit.Test

class PersonSpec {
  @Test
  def createPersonShouldSucceedForScala(): Unit = {
    def person: Named = new Person("bob smith")
  }

  @Test
  def createPersonShouldSucceedForJava(): Unit = {
    def person: Named = new JavaPerson("alice smith")
  }

package org.gradle.samples;

import org.junit.Test;

import static org.junit.Assert.*;

/**
 * Example local unit test, which will execute on the development machine (host).
 *
 * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
 */
public class ExampleUnitTest {
    @Test
    public void addition_isCorrect() {
        assertEquals(4, 2 + 2);
    }

Sterling Greene <******@****.***> 1700166003 -0500

fun assertStandardOutputOf(expected: String, action: () -> Unit): Unit =
    assertThat(
        standardOutputOf(action),
        equalTo(expected.normaliseLineSeparators())
    )


fun standardOutputOf(action: () -> Unit): String =
    ByteArrayOutputStream().also {
        val out = System.out
        try {
            System.setOut(PrintStream(it, true))
            action()
        } finally {

package org.gradle.sample

import org.junit.Test

class PersonSpec {
  @Test
  def personCreationShouldSuccessfullyCreatePerson(): Unit = {
    def person: Named = new Person(List("bob", "smith"))
  }

package org.gradle.sample

import org.junit.Test

class PersonSpec {
  @Test
  def personCreationShouldSuccessfullyCreatePerson(): Unit = {
    def person: Named = new Person(List("bob", "smith"))
  }

import org.hamcrest.MatcherAssert.assertThat
import org.junit.Test
import spock.lang.Issue


class UnitCodecTest : AbstractUserTypeCodecTest() {

    @Test
    @Issue("https://github.com/gradle/gradle/issues/25560")
    fun `same Unit instance is used upon restore`() {
        configurationCacheRoundtripOf(Unit).run {
            assertThat(this, sameInstance(Unit))
        }
    }

import com.google.common.collect.testing.features.CollectionFeature;
import com.google.common.collect.testing.features.CollectionSize;
import java.util.Set;
import junit.framework.Test;
import junit.framework.TestCase;

/**
 * Unit test for {@link MinimalSet}.
 *
 * @author Regina O'Dell
 */
public class MinimalSetTest extends TestCase {
  public static Test suite() {
    return SetTestSuiteBuilder.using(