Issue #13100: Create tests from FinalClass xdoc examples

src/xdocs-examples/java/com/puppycrawl/tools/checkstyle/checks/design/FinalClassCheckExamplesTest.java

@@ -0,0 +1,47 @@
+///////////////////////////////////////////////////////////////////////////////////////////////
+// checkstyle: Checks Java source code and other text files for adherence to a set of rules.
+// Copyright (C) 2001-2023 the original author or authors.
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 2.1 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+///////////////////////////////////////////////////////////////////////////////////////////////
+
+package com.puppycrawl.tools.checkstyle.checks.design;
+
+import org.junit.jupiter.api.Disabled;
+import org.junit.jupiter.api.Test;
+
+import com.puppycrawl.tools.checkstyle.AbstractModuleTestSupport;
+
+@Disabled("until https://github.com/checkstyle/checkstyle/issues/13345")
+public class FinalClassCheckExamplesTest extends AbstractModuleTestSupport {
+    @Override
+    protected String getPackageLocation() {
+        return "xdocs-examples";
+    }
+
+    @Override
+    protected String getResourceLocation() {
+        return "com/puppycrawl/tools/checkstyle/checks/design/finalclass";
+    }
+
+    @Test
+    public void testExample1() throws Exception {
+        final String[] expected = {
+
+        };
+
+        verifyWithInlineConfigParser(getPath("Example1.txt"), expected);
+    }
+}

src/xdocs-examples/resources/com/puppycrawl/tools/checkstyle/checks/design/finalclass/Example1.txt

@@ -0,0 +1,49 @@
+/*xml
+<module name="Checker">
+  <module name="TreeWalker">
+    <module name="FinalClass"/>
+  </module>
+</module>
+*/
+
+// xdoc section -- start
+final class MyClass { // OK
+  private MyClass() { }
+}
+
+class MyClass { // violation, class should be declared final
+  private MyClass() { }
+}
+
+class MyClass { // OK, since it has a public constructor
+  int field1;
+  String field2;
+  private MyClass(int value) {
+    this.field1 = value;
+    this.field2 = " ";
+  }
+  public MyClass(String value) {
+    this.field2 = value;
+    this.field1 = 0;
+  }
+}
+
+class TestAnonymousInnerClasses { // OK, class has an anonymous inner class.
+    public static final TestAnonymousInnerClasses ONE = new TestAnonymousInnerClasses() {
+
+    };
+
+    private TestAnonymousInnerClasses() {
+    }
+}
+
+class Class1 {
+
+    private class Class2 { // violation, class should be declared final
+    }
+
+    public class Class3 { // ok
+    }
+
+}
+// xdoc section -- end