fix: fix junit 6 support

Author: wenytang-ms

java-extension/com.microsoft.java.test.plugin/src/main/java/com/microsoft/java/test/plugin/searcher/JUnit6TestFinder.java

@@ -121,8 +121,12 @@ public boolean isTest(IType type) throws JavaModelException {
     }
 
     private boolean internalIsTest(IType type, IProgressMonitor pm) throws JavaModelException {
-        // Use JUnit 6 loader to check if the class is accessible
-        if (!CoreTestSearchEngine.isAccessibleClass(type, JUNIT6_LOADER)) {
+        // Use JUnit 6 loader to check if the class is accessible.
+        // Fall back to JUnit 5 loader since Eclipse JDT may not have registered
+        // the JUnit 6 loader yet. JUnit 6 is backward compatible with JUnit 5.
+        if (!CoreTestSearchEngine.isAccessibleClass(type, JUNIT6_LOADER) &&
+                !CoreTestSearchEngine.isAccessibleClass(type,
+                        "org.eclipse.jdt.junit.loader.junit5")) {
             return false;
         }
 

java-extension/com.microsoft.java.test.plugin/src/main/java/com/microsoft/java/test/plugin/searcher/JUnit6TestSearcher.java

@@ -51,7 +51,12 @@ public TestKind getTestKind() {
 
     @Override
     public String getJdtTestKind() {
-        return TestKindRegistry.JUNIT6_TEST_KIND_ID;
+        // Use JUnit 5 test kind ID because Eclipse JDT's TestKindRegistry does not
+        // have a registered JUnit 6 loader yet. The isAccessibleClass() check in
+        // CoreTestSearchEngine requires a registered loader to work correctly.
+        // Since JUnit 6 is backward compatible with JUnit 5's Jupiter platform,
+        // using the JUnit 5 loader for classpath accessibility checks is safe.
+        return TestKindRegistry.JUNIT5_TEST_KIND_ID;
     }
 
     @Override

java-extension/com.microsoft.java.test.plugin/src/main/java/com/microsoft/java/test/plugin/util/TestSearchUtils.java

@@ -429,6 +429,12 @@ private static void findTestItemsInTypeBinding(ITypeBinding typeBinding, JavaTes
                     .setLevel(TestLevel.CLASS)
                     .setKind(TestKind.JUnit5)
                     .build();
+            } else if (TestFrameworkUtils.JUNIT6_TEST_SEARCHER.isTestClass(type)) {
+                // to handle @Nested and @Testable classes in JUnit 6
+                classItem = new JavaTestItemBuilder().setJavaElement(type)
+                    .setLevel(TestLevel.CLASS)
+                    .setKind(TestKind.JUnit6)
+                    .build();
             }
         }
 

package.json

@@ -56,18 +56,18 @@
     "contributes": {
         "javaExtensions": [
             "./server/com.microsoft.java.test.plugin-0.43.1.jar",
-            "./server/junit-jupiter-api_5.14.1.jar",
+            "./server/junit-jupiter-api_5.14.3.jar",
             "./server/junit-jupiter-api_6.0.1.jar",
-            "./server/junit-jupiter-engine_5.14.1.jar",
+            "./server/junit-jupiter-engine_5.14.3.jar",
             "./server/junit-jupiter-engine_6.0.1.jar",
             "./server/junit-jupiter-migrationsupport_5.14.1.jar",
-            "./server/junit-jupiter-params_5.14.1.jar",
+            "./server/junit-jupiter-params_5.14.3.jar",
             "./server/junit-jupiter-params_6.0.1.jar",
-            "./server/junit-platform-commons_1.14.1.jar",
+            "./server/junit-platform-commons_1.14.3.jar",
             "./server/junit-platform-commons_6.0.1.jar",
-            "./server/junit-platform-engine_1.14.1.jar",
+            "./server/junit-platform-engine_1.14.3.jar",
             "./server/junit-platform-engine_6.0.1.jar",
-            "./server/junit-platform-launcher_1.14.1.jar",
+            "./server/junit-platform-launcher_1.14.3.jar",
             "./server/junit-platform-launcher_6.0.1.jar",
             "./server/junit-platform-runner_1.14.1.jar",
             "./server/junit-platform-suite-api_1.14.1.jar",