BAEL-2263 Using JUnit 5 with Gradle

gradle/junit5/build.gradle

@@ -0,0 +1,25 @@
+plugins {
+    // Apply the java-library plugin to add support for Java Library
+    id 'java-library'
+}
+
+dependencies {
+    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.3.1'
+    testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.3.1'
+    
+    // Only necessary for JUnit 3 and 4 tests
+    testCompileOnly 'junit:junit:4.12' 
+    testRuntimeOnly 'org.junit.vintage:junit-vintage-engine:5.3.1' 
+    
+}
+
+repositories {
+    jcenter()
+}
+
+test {
+    useJUnitPlatform {
+    	includeTags 'fast'
+        excludeTags 'slow'
+    }
+}

gradle/junit5/src/test/java/com/example/CalculatorJUnit4Test.java

@@ -0,0 +1,12 @@
+package com.example;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+public class CalculatorJUnit4Test {
+    @Test
+    public void testAdd() {
+        assertEquals(42, Integer.sum(19, 23));
+    }
+}

gradle/junit5/src/test/java/com/example/CalculatorJUnit5Test.java

@@ -0,0 +1,36 @@
+package com.example;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+import org.junit.jupiter.api.Tag;
+import org.junit.jupiter.api.Test;;
+
+public class CalculatorJUnit5Test {
+
+    @Tag("fast")
+    @Test
+    public void testAdd() {
+        assertEquals(42, Integer.sum(19, 23));
+    }
+
+    @Tag("slow")
+    @Test
+    public void testAddMaxInteger() {
+        assertEquals(2147483646, Integer.sum(2147183646, 300000));
+    }
+
+    @Tag("fast")
+    @Test
+    public void testAddZero() {
+        assertEquals(21, Integer.sum(21, 0));
+    }
+
+    @Tag("fast")
+    @Test
+    public void testDivide() {
+        assertThrows(ArithmeticException.class, () -> {
+            Integer.divideUnsigned(42, 0);
+        });
+    }
+}

gradle/settings.gradle

@@ -5,6 +5,6 @@ include 'greeting-library'
 include 'greeting-library-java'
 include 'greeter'
 include 'gradletaskdemo'
-
+include 'junit5'
 
 println 'This will be executed during the initialization phase.'