/*
    * SPDX-FileCopyrightText: Copyright (c) 2011-2026 Yegor Bugayenko
    * SPDX-License-Identifier: MIT
    */
   package com.qulice.pmd;
   
   import com.google.common.base.Joiner;
   import com.qulice.spi.Environment;
   import com.qulice.spi.Violation;
  import java.io.File;
  import java.util.Collections;
  import org.hamcrest.MatcherAssert;
  import org.hamcrest.Matchers;
  import org.junit.jupiter.api.Test;
  
  /**
   * Test case for {@link PmdValidator}'s handling of private
   * constants that are used only from within an inner class —
   * they must not be reported as unused.
   * @since 0.25.1
   */
  final class PmdInnerClassConstantsTest {
  
      @Test
      void doesNotComplainAboutConstantsInInnerClasses() throws Exception {
          final String file = "src/main/java/foo/Foo.java";
          final Environment env = new Environment.Mock().withFile(
              file,
              Joiner.on('\n').join(
                  "package foo;",
                  "interface Foo {",
                  "  final class Bar implements Foo {",
                  "    private static final Pattern TEST =",
                  "      Pattern.compile(\"hey\");",
                  "    public String doSomething() {",
                  "      return Foo.Bar.TEST.toString();",
                  "    }",
                  "  }",
                  "}"
              )
          );
          MatcherAssert.assertThat(
              "Private constant in inner class is not a violation",
              new PmdValidator(env).validate(
                  Collections.singletonList(new File(env.basedir(), file))
              ),
              Matchers.<Violation>empty()
          );
      }
  }