Add a unit test for a local class with a javadoc'ed method.

core/src/main/java/com/google/errorprone/bugpatterns/javadoc/NotJavadoc.java

@@ -76,8 +76,8 @@ public Description matchCompilationUnit(CompilationUnitTree tree, VisitorState s
         }
         var message =
             seeminglyJavadocableTrees.contains(token.pos())
-                ? "This comment seems to be attached to a method or class, but methods and classes"
-                    + " nested within methods cannot be documented with Javadoc."
+                ? "Local classes (or methods within local classes) cannot be documented with"
+                    + " Javadoc."
                 : message();
         state.reportMatch(
             buildDescription(getDiagnosticPosition(comment.getSourcePos(0), tree))

core/src/test/java/com/google/errorprone/bugpatterns/javadoc/NotJavadocTest.java

@@ -63,7 +63,7 @@ public void nestedClass() {
             """
             class Test {
               void test() {
-                // BUG: Diagnostic contains: nested
+                // BUG: Diagnostic contains: Local classes
                 /** Not Javadoc. */
                 class A {}
               }
@@ -72,6 +72,25 @@ class A {}
         .doTest();
   }
 
+  @Test
+  public void nestedClassWithMethod() {
+    // TODO(kak): we should also fix the "javadocs" on the method inside the local class
+    compilationHelper
+        .addSourceLines(
+            "Test.java",
+            """
+            class Test {
+              void test() {
+                class A {
+                  /** Not Javadoc. */
+                  void method() {}
+                }
+              }
+            }
+            """)
+        .doTest();
+  }
+
   @Test
   public void doubleJavadoc() {
     helper
@@ -97,17 +116,24 @@ public void notJavadocOnLocalClass() {
             class Test {
               void test() {
                 /** Not Javadoc. */
-                class A {}
+                class A {
+                  /** Not Javadoc. */
+                  void method() {}
+                }
               }
             }
             """)
+        // TODO(kak): we should also fix the "javadocs" on the method inside the local class
         .addOutputLines(
             "Test.java",
             """
             class Test {
               void test() {
                 /* Not Javadoc. */
-                class A {}
+                class A {
+                  /** Not Javadoc. */
+                  void method() {}
+                }
               }
             }
             """)