chore: delete junit3 reference

- updated test to junit5
- delete dead code

Author: sparsick

compat/maven-embedder/src/examples/simple-project/pom.xml

@@ -26,12 +26,12 @@ under the License.
   <name>simple-project</name>
   <url>http://maven.apache.org</url>
   <dependencies>
-    <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
-      <version>4.13.1</version>
-      <scope>test</scope>
-    </dependency>
+      <dependency>
+          <groupId>org.junit.jupiter</groupId>
+          <artifactId>junit-jupiter-api</artifactId>
+          <version>5.14.0</version>
+          <scope>test</scope>
+      </dependency>
   </dependencies>
   <properties>
     <environment>development</environment>

compat/maven-embedder/src/examples/simple-project/src/test/java/org/apache/maven/embedder/AppTest.java

@@ -19,39 +19,19 @@
 
 package org.apache.maven.embedder;
 
-import junit.framework.Test;
-import junit.framework.TestCase;
-import junit.framework.TestSuite;
-
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 /**
  * Unit test for simple App.
  */
-public class AppTest
-    extends TestCase
-{
-    /**
-     * Create the test case
-     *
-     * @param testName name of the test case
-     */
-    public AppTest( String testName )
-    {
-        super( testName );
-    }
+public class AppTest {
 
     /**
-     * @return the suite of tests being tested
+     * Rigourous Test :-)
      */
-    public static Test suite()
-    {
-        return new TestSuite( AppTest.class );
-    }
-
-    /**
-     * Rigorous Test :-)
-     */
-    public void testApp()
-    {
-        assertTrue( true );
+    @Test
+    public void testApp() {
+        assertTrue(true);
     }
 }
+

impl/maven-core/src/test/projects/lifecycle-executor/project-with-additional-lifecycle-elements/src/test/java/org/apache/maven/lifecycle/test/AppTest.java

@@ -1,38 +1,18 @@
 package org.apache.maven.lifecycle.test;
 
-import junit.framework.Test;
-import junit.framework.TestCase;
-import junit.framework.TestSuite;
-
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 /**
  * Unit test for simple App.
  */
-public class AppTest
-    extends TestCase
-{
-    /**
-     * Create the test case
-     *
-     * @param testName name of the test case
-     */
-    public AppTest( String testName )
-    {
-        super( testName );
-    }
+public class AppTest {
 
     /**
-     * @return the suite of tests being tested
+     * Rigourous Test :-)
      */
-    public static Test suite()
-    {
-        return new TestSuite( AppTest.class );
-    }
-
-    /**
-     * Rigorous Test :-)
-     */
-    public void testApp()
-    {
-        assertTrue( true );
+    @Test
+    public void testApp() {
+        assertTrue(true);
     }
 }
+