Modularize example program in junit-source-launcher

junit-source-launcher/README.md

@@ -1,18 +1,22 @@
 # junit-source-launcher
 
 Starting with Java 25 it is possible to write minimal source code test programs using the `org.junit.start` module.
-For example, take a look at the [HelloTests.java](src/HelloTests.java) file reading:
+For example, take a look at the [HelloTests.java](src/example/HelloTests.java) file reading:
 
 ```java
+package example;
+
 import module org.junit.start;
 
-void main() {
-    JUnit.run();
-}
+class HelloTests {
+    void main() {
+        JUnit.run();
+    }
 
-@Test
-void stringLength() {
-    Assertions.assertEquals(11, "Hello JUnit".length());
+    @Test
+    void stringLength() {
+        Assertions.assertEquals(11, "Hello JUnit".length());
+    }
 }
 ```
 
@@ -25,7 +29,7 @@ java lib/DownloadRequiredModules.java
 With all required modular JAR files available in a local `lib/` directory, the following Java command will discover and execute tests using the JUnit Platform.
 
 ```shell
-java --module-path lib --add-modules org.junit.start src/HelloTests.java
+java --module-path lib src/example/HelloTests.java
 ```
 
 It will also print the result tree to the console.

junit-source-launcher/lib/DownloadRequiredModules.java

@@ -38,7 +38,7 @@
 
 void main() throws Exception {
   // Ensure being launched inside expected working directory
-  var program = Path.of("src", "HelloTests.java");
+  var program = Path.of("src", "example", "HelloTests.java");
   if (!Files.exists(program)) {
     throw new AssertionError("Expected %s in current working directory".formatted(program));
   }

junit-source-launcher/src/HelloTests.java → junit-source-launcher/src/example/HelloTests.java

@@ -8,13 +8,17 @@
  * https://www.eclipse.org/legal/epl-v20.html
  */
 
+package example;
+
 import module org.junit.start;
 
-void main() {
-	JUnit.run();
-}
+class HelloTests {
+	void main() {
+		JUnit.run();
+	}
 
-@Test
-void stringLength() {
-	Assertions.assertEquals(11, "Hello JUnit".length());
+	@Test
+	void stringLength() {
+		Assertions.assertEquals(11, "Hello JUnit".length());
+	}
 }

junit-source-launcher/src/module-info.java

@@ -0,0 +1,13 @@
+/*
+ * Copyright 2015-2026 the original author or authors.
+ *
+ * All rights reserved. This program and the accompanying materials are
+ * made available under the terms of the Eclipse Public License v2.0 which
+ * accompanies this distribution and is available at
+ *
+ * https://www.eclipse.org/legal/epl-v20.html
+ */
+
+open module example {
+    requires org.junit.start;
+}

src/Builder.java

@@ -82,8 +82,7 @@ int build(Target target, Set<String> excludedProjects) {
 		runProject(excludedProjects, "junit-source-launcher",
 				"java",
 				"--module-path", "lib",
-				"--add-modules", "org.junit.start",
-				"src/HelloTests.java");
+				"src/example/HelloTests.java");
 		System.out.printf("%n%n%n|%n| Done. Build exits with status = %d.%n|%n", status);
 		return status;
 	}