From ef8e084d6d540d2d01a73c15394e238f49c73589 Mon Sep 17 00:00:00 2001
From: Mladen Savic <mladensavic94@gmail.com>
Date: Fri, 1 Oct 2021 13:04:07 +0200
Subject: [PATCH] Parallel Test Execution for JUnit 5

---
 junit5/README.md                              |  6 +++
 junit5/pom.xml                                | 36 +++++++++++++++
 .../java/com/baeldung/junit5/A_UnitTest.java  | 21 +++++++++
 .../java/com/baeldung/junit5/B_UnitTest.java  | 23 ++++++++++
 .../java/com/baeldung/junit5/C_UnitTest.java  | 45 +++++++++++++++++++
 .../test/resources/junit-platform.properties  |  4 ++
 pom.xml                                       |  1 +
 7 files changed, 136 insertions(+)
 create mode 100644 junit5/README.md
 create mode 100644 junit5/pom.xml
 create mode 100644 junit5/src/test/java/com/baeldung/junit5/A_UnitTest.java
 create mode 100644 junit5/src/test/java/com/baeldung/junit5/B_UnitTest.java
 create mode 100644 junit5/src/test/java/com/baeldung/junit5/C_UnitTest.java
 create mode 100644 junit5/src/test/resources/junit-platform.properties

diff --git a/junit5/README.md b/junit5/README.md
new file mode 100644
index 0000000000..ad16ad164d
--- /dev/null
+++ b/junit5/README.md
@@ -0,0 +1,6 @@
+## JUnit5
+
+This module contains articles about the JUnit 5
+
+### Relevant Articles:
+
diff --git a/junit5/pom.xml b/junit5/pom.xml
new file mode 100644
index 0000000000..b9804408a2
--- /dev/null
+++ b/junit5/pom.xml
@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>junit5</artifactId>
+    <name>junit5</name>
+
+    <parent>
+        <artifactId>parent-modules</artifactId>
+        <groupId>com.baeldung</groupId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+
+    <properties>
+        <maven.compiler.source>8</maven.compiler.source>
+        <maven.compiler.target>8</maven.compiler.target>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-api</artifactId>
+            <version>5.8.1</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-engine</artifactId>
+            <version>5.8.1</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+</project>
\ No newline at end of file
diff --git a/junit5/src/test/java/com/baeldung/junit5/A_UnitTest.java b/junit5/src/test/java/com/baeldung/junit5/A_UnitTest.java
new file mode 100644
index 0000000000..e4ba59b22d
--- /dev/null
+++ b/junit5/src/test/java/com/baeldung/junit5/A_UnitTest.java
@@ -0,0 +1,21 @@
+package com.baeldung.junit5;
+
+import org.junit.jupiter.api.Test;
+
+public class A_UnitTest {
+
+    @Test
+    public void first() throws Exception{
+        System.out.println("Test A first() start => " + Thread.currentThread().getName());
+        Thread.sleep(500);
+        System.out.println("Test A first() end => " + Thread.currentThread().getName());
+    }
+
+    @Test
+    public void second() throws Exception{
+        System.out.println("Test A second() start => " + Thread.currentThread().getName());
+        Thread.sleep(500);
+        System.out.println("Test A second() end => " + Thread.currentThread().getName());
+    }
+
+}
diff --git a/junit5/src/test/java/com/baeldung/junit5/B_UnitTest.java b/junit5/src/test/java/com/baeldung/junit5/B_UnitTest.java
new file mode 100644
index 0000000000..2b195d2551
--- /dev/null
+++ b/junit5/src/test/java/com/baeldung/junit5/B_UnitTest.java
@@ -0,0 +1,23 @@
+package com.baeldung.junit5;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.parallel.Execution;
+import org.junit.jupiter.api.parallel.ExecutionMode;
+
+public class B_UnitTest {
+
+    @Test
+    public void first() throws Exception{
+        System.out.println("Test B first() start => " + Thread.currentThread().getName());
+        Thread.sleep(500);
+        System.out.println("Test B first() end => " + Thread.currentThread().getName());
+    }
+
+    @Test
+    public void second() throws Exception{
+        System.out.println("Test B second() start => " + Thread.currentThread().getName());
+        Thread.sleep(500);
+        System.out.println("Test B second() end => " + Thread.currentThread().getName());
+    }
+
+}
diff --git a/junit5/src/test/java/com/baeldung/junit5/C_UnitTest.java b/junit5/src/test/java/com/baeldung/junit5/C_UnitTest.java
new file mode 100644
index 0000000000..ce545f6bee
--- /dev/null
+++ b/junit5/src/test/java/com/baeldung/junit5/C_UnitTest.java
@@ -0,0 +1,45 @@
+package com.baeldung.junit5;
+
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.parallel.ResourceLock;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class C_UnitTest {
+
+    private List<String> resources;
+
+    @BeforeEach
+    void before() {
+        resources = new ArrayList<>();
+        resources.add("test");
+    }
+
+    @AfterEach
+    void after() {
+        resources.clear();
+    }
+
+    @Test
+    @ResourceLock(value = "resources")
+    public void first() throws Exception {
+        System.out.println("Test C first() start => " + Thread.currentThread().getName());
+        resources.add("first");
+        System.out.println(resources);
+        Thread.sleep(500);
+        System.out.println("Test C first() end => " + Thread.currentThread().getName());
+    }
+
+    @Test
+    @ResourceLock(value = "resources")
+    public void second() throws Exception {
+        System.out.println("Test C second() start => " + Thread.currentThread().getName());
+        resources.add("second");
+        System.out.println(resources);
+        Thread.sleep(500);
+        System.out.println("Test C second() end => " + Thread.currentThread().getName());
+    }
+}
diff --git a/junit5/src/test/resources/junit-platform.properties b/junit5/src/test/resources/junit-platform.properties
new file mode 100644
index 0000000000..42100f85da
--- /dev/null
+++ b/junit5/src/test/resources/junit-platform.properties
@@ -0,0 +1,4 @@
+junit.jupiter.execution.parallel.enabled = true
+junit.jupiter.execution.parallel.config.strategy=dynamic
+junit.jupiter.execution.parallel.mode.default = concurrent
+junit.jupiter.execution.parallel.mode.classes.default = concurrent
diff --git a/pom.xml b/pom.xml
index f5ac14a009..8d28669313 100644
--- a/pom.xml
+++ b/pom.xml
@@ -472,6 +472,7 @@
                 <module>json-path</module>
                 <module>jsoup</module>
                 <module>jta</module>
+                <module>junit5</module>
                 <module>kubernetes</module>
                 <module>ksqldb</module>
                 <!-- <module>lagom</module> --> <!-- Not a maven project -->