Add a test file with ordinary useJUnitPlatform()

build.gradle

@@ -16,6 +16,9 @@ configurations {
 }
 
 dependencies {
+    testImplementation "org.junit.jupiter:junit-jupiter-api:5.11.0"
+
+    testRuntimeOnly "org.junit.jupiter:junit-jupiter-engine:5.11.0"
 }
 
 // A safer and strict alternative to: "dependencies" (and "dependencies --write-locks")
@@ -32,3 +35,16 @@ allprojects {
         }
     }
 }
+
+test {
+    useJUnitPlatform()
+    testLogging {
+        events "started", "passed", "skipped", "failed", "standardOut", "standardError"
+        exceptionFormat = org.gradle.api.tasks.testing.logging.TestExceptionFormat.FULL
+        showCauses = true
+        showExceptions = true
+        showStackTraces = true
+        showStandardStreams = true
+        outputs.upToDateWhen { false }
+    }
+}

src/test/java/org/embulk/junit5/example/TestExample.java

@@ -0,0 +1,12 @@
+package org.embulk.junit5.example;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.jupiter.api.Test;
+
+public class TestExample {
+    @Test
+    public void testExample() {
+        assertEquals(0, 1 - 1);
+    }
+}