/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you under the Apache License, Version 2.0 (the
    * "License"); you may not use this file except in compliance
    * with the License.  You may obtain a copy of the License at
    *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   */
  package org.apache.maven.plugins.javadoc;
  
  import java.io.File;
  import java.io.IOException;
  import java.net.HttpURLConnection;
  import java.net.URL;
  import java.nio.charset.Charset;
  import java.nio.charset.StandardCharsets;
  import java.nio.file.Files;
  import java.nio.file.Path;
  import java.nio.file.Paths;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Locale;
  import java.util.Map;
  import java.util.Objects;
  
  import org.apache.commons.lang3.StringUtils;
  import org.apache.maven.execution.MavenSession;
  import org.apache.maven.model.Plugin;
  import org.apache.maven.plugin.LegacySupport;
  import org.apache.maven.plugin.MojoExecution;
  import org.apache.maven.plugin.MojoExecutionException;
  import org.apache.maven.plugin.MojoFailureException;
  import org.apache.maven.plugin.testing.AbstractMojoTestCase;
  import org.apache.maven.plugin.testing.stubs.MavenProjectStub;
  import org.apache.maven.plugins.javadoc.ProxyServer.AuthAsyncProxyServlet;
  import org.apache.maven.project.MavenProject;
  import org.apache.maven.project.ProjectBuildingRequest;
  import org.apache.maven.project.ProjectBuildingRequest.RepositoryMerging;
  import org.apache.maven.settings.Proxy;
  import org.apache.maven.settings.Settings;
  import org.apache.maven.shared.utils.io.FileUtils;
  import org.codehaus.plexus.languages.java.version.JavaVersion;
  import org.eclipse.aether.DefaultRepositorySystemSession;
  import org.eclipse.aether.internal.impl.SimpleLocalRepositoryManagerFactory;
  import org.eclipse.aether.repository.LocalRepository;
  import org.hamcrest.MatcherAssert;
  import org.junit.AssumptionViolatedException;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import static org.apache.commons.io.FileUtils.copyDirectory;
  import static org.apache.commons.io.FileUtils.deleteDirectory;
  import static org.assertj.core.api.Assertions.assertThat;
  import static org.hamcrest.CoreMatchers.anyOf;
  import static org.hamcrest.CoreMatchers.containsString;
  import static org.hamcrest.CoreMatchers.is;
  import static org.junit.Assume.assumeThat;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.spy;
  import static org.mockito.Mockito.when;
  
  /**
   * Test {@link org.apache.maven.plugins.javadoc.JavadocReport} class.
   *
   * @author <a href="mailto:oching@apache.org">Maria Odea Ching</a>
   * @author <a href="mailto:vincent.siveton@gmail.com">Vincent Siveton</a>
   */
  public class JavadocReportTest extends AbstractMojoTestCase {
  
      private static final char LINE_SEPARATOR = ' ';
  
      public static final String OPTIONS_UMLAUT_ENCODING = "Options Umlaut Encoding ö ä ü ß";
  
      private Path unit;
  
      private Path tempDirectory;
  
      private File localRepo;
  
      private static final Logger LOGGER = LoggerFactory.getLogger(JavadocReportTest.class);
  
      @Override
      protected void setUp() throws Exception {
          super.setUp();
  
          tempDirectory = Files.createTempDirectory("JavadocReportTest");
          localRepo = tempDirectory.resolve(Paths.get("target/local-repo/")).toFile();
          unit = new File(getBasedir(), "src/test/resources/unit").toPath();
 
         createTestRepo();
     }
 
     @Override
     protected void tearDown() throws Exception {
         try {
             deleteDirectory(tempDirectory.toFile());
         } catch (IOException ex) {
             // CI servers can have problems deleting files.
             // It will get cleared out eventually, and since
             // temporary directories have unique names,
             // it shouldn't affect subsequent tests.
         }
 
         super.tearDown();
     }
 
     private JavadocReport lookupMojo(Path testPom) throws Exception {
         JavadocReport mojo = (JavadocReport) lookupMojo("javadoc", testPom.toFile());
 
         Plugin p = new Plugin();
         p.setGroupId("org.apache.maven.plugins");
         p.setArtifactId("maven-javadoc-plugin");
         MojoExecution mojoExecution = new MojoExecution(p, "javadoc", null);
 
         setVariableValueToObject(mojo, "mojoExecution", mojoExecution);
 
         MavenProject currentProject = new MavenProjectStub();
         currentProject.setGroupId("GROUPID");
         currentProject.setArtifactId("ARTIFACTID");
 
         List<MavenProject> reactorProjects =
                 mojo.getReactorProjects() != null ? mojo.getReactorProjects() : Collections.emptyList();
         MavenSession session = newMavenSession(currentProject);
         setVariableValueToObject(mojo, "session", session);
         setVariableValueToObject(mojo, "repoSession", session.getRepositorySession());
         setVariableValueToObject(mojo, "reactorProjects", reactorProjects);
         return mojo;
     }
 
     /**
      * Create test repository in target directory.
      *
      * @throws IOException if any
      */
     private void createTestRepo() throws IOException {
         assertTrue(localRepo.mkdirs());
 
         // ----------------------------------------------------------------------
         // UMLGraph
         // ----------------------------------------------------------------------
 
         Path sourceDir = unit.resolve("doclet-test/artifact-doclet");
         assertThat(sourceDir).exists();
         copyDirectory(sourceDir.toFile(), localRepo);
 
         // ----------------------------------------------------------------------
         // UMLGraph-bis
         // ----------------------------------------------------------------------
 
         sourceDir = unit.resolve("doclet-path-test/artifact-doclet");
         assertThat(sourceDir).exists();
         copyDirectory(sourceDir.toFile(), localRepo);
 
         // ----------------------------------------------------------------------
         // commons-attributes-compiler
         // https://www.tullmann.org/pat/taglets/
         // ----------------------------------------------------------------------
 
         sourceDir = unit.resolve("taglet-test/artifact-taglet");
         assertThat(sourceDir).exists();
         copyDirectory(sourceDir.toFile(), localRepo);
 
         // ----------------------------------------------------------------------
         // stylesheetfile-test
         // ----------------------------------------------------------------------
 
         sourceDir = unit.resolve("stylesheetfile-test/artifact-stylesheetfile");
         assertThat(sourceDir).exists();
         copyDirectory(sourceDir.toFile(), localRepo);
 
         // ----------------------------------------------------------------------
         // helpfile-test
         // ----------------------------------------------------------------------
 
         sourceDir = unit.resolve("helpfile-test/artifact-helpfile");
         assertThat(sourceDir).exists();
         copyDirectory(sourceDir.toFile(), localRepo);
 
         // Remove SCM files
         List<String> files = FileUtils.getFileAndDirectoryNames(
                 localRepo, FileUtils.getDefaultExcludesAsString(), null, true, true, true, true);
         for (String filename : files) {
             File file = new File(filename);
 
             if (file.isDirectory()) {
                 deleteDirectory(file);
             } else {
                 file.delete();
             }
         }
     }
 
     /**
      * Convenience method that reads the contents of the specified file object into a string with a
      * <code>space</code> as line separator.
      *
      * @see #LINE_SEPARATOR
      * @param file the file to be read
      * @return a String object that contains the contents of the file
      * @throws IOException if any
      */
     private static String readFile(Path file) throws IOException {
         return readFile(file, StandardCharsets.UTF_8);
     }
 
     /**
      * Convenience method that reads the contents of the specified file object into a string with a
      * <code>space</code> as line separator.
      *
      * @see #LINE_SEPARATOR
      * @param file the file to be read
      * @param cs charset to use
      * @return a String object that contains the contents of the file
      * @throws IOException if any
      */
     private static String readFile(Path file, Charset cs) throws IOException {
         StringBuilder str = new StringBuilder((int) Files.size(file));
 
         for (String strTmp : Files.readAllLines(file, cs)) {
             str.append(LINE_SEPARATOR);
             str.append(strTmp);
         }
 
         return str.toString();
     }
 
     /**
      * Test when default configuration is provided for the plugin
      *
      * @throws Exception if any
      */
     public void testDefaultConfiguration() throws Exception {
         Path testPom = unit.resolve("default-configuration/default-configuration-plugin-config.xml");
         JavadocReport mojo = lookupMojo(testPom);
         mojo.execute();
 
         // package level generated javadoc files
         Path apidocs = new File(getBasedir(), "target/test/unit/default-configuration/target/site/apidocs").toPath();
 
         String appHtml = "def/configuration/App.html";
         Path generatedFile = apidocs.resolve(appHtml);
         assertThat(generatedFile).exists();
 
         if (JavaVersion.JAVA_SPECIFICATION_VERSION.isBefore("16")) {
             String url = Objects.requireNonNull(mojo.getDefaultJavadocApiLink()).getUrl();
             HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection();
             connection.setRequestMethod("HEAD");
             try {
                 // only test when URL can be reached
                 if (connection.getResponseCode() == HttpURLConnection.HTTP_OK) {
                     try {
                         assumeThat(connection.getURL().toString(), is(url));
 
                         // https://bugs.openjdk.java.net/browse/JDK-8216497
                         MatcherAssert.assertThat(
                                 url + " available, but " + appHtml + " is missing link to java.lang.Object",
                                 new String(Files.readAllBytes(generatedFile), StandardCharsets.UTF_8),
                                 anyOf(
                                         containsString("/docs/api/java/lang/Object.html"),
                                         containsString("/docs/api/java.base/java/lang/Object.html")));
                     } catch (AssumptionViolatedException e) {
                         LOGGER.warn("ignoring defaultAPI check: {}", e.getMessage());
                     }
                 }
             } catch (Exception e) {
                 LOGGER.error("error connecting to javadoc URL: {}", url);
                 throw e;
             }
         } else {
             MatcherAssert.assertThat(
                     new String(Files.readAllBytes(generatedFile), StandardCharsets.UTF_8),
                     containsString("/docs/api/java.base/java/lang/Object.html"));
         }
 
         assertThat(apidocs.resolve("def/configuration/AppSample.html")).exists();
         assertThat(apidocs.resolve("def/configuration/package-summary.html")).exists();
         assertThat(apidocs.resolve("def/configuration/package-tree.html")).exists();
         assertThat(apidocs.resolve("def/configuration/package-use.html")).exists();
 
         // package-frame and allclasses-(no)frame not generated anymore since Java 11
         if (JavaVersion.JAVA_SPECIFICATION_VERSION.isBefore("11")) {
             assertThat(apidocs.resolve("def/configuration/package-frame.html")).exists();
             assertThat(apidocs.resolve("allclasses-frame.html"))
                     .exists()
                     .content()
                     .containsOnlyOnce("def/configuration/App.html")
                     .containsOnlyOnce("def/configuration/AppSample.html");
             assertThat(apidocs.resolve("allclasses-noframe.html"))
                     .exists()
                     .content()
                     .containsOnlyOnce("def/configuration/App.html")
                     .containsOnlyOnce("def/configuration/AppSample.html");
         }
 
         // class level generated javadoc files
         assertThat(apidocs.resolve("def/configuration/class-use/App.html")).exists();
         assertThat(apidocs.resolve("def/configuration/class-use/AppSample.html"))
                 .exists();
 
         // project level generated javadoc files
         assertThat(apidocs.resolve("constant-values.html")).exists();
         assertThat(apidocs.resolve("deprecated-list.html")).exists();
         assertThat(apidocs.resolve("help-doc.html")).exists();
         assertThat(apidocs.resolve("index-all.html")).exists();
         assertThat(apidocs.resolve("index.html")).exists();
         assertThat(apidocs.resolve("overview-tree.html")).exists();
         if (JavaVersion.JAVA_VERSION.isAtLeast("23")) {
             assertThat(apidocs.resolve("resource-files/stylesheet.css")).exists();
         } else {
 
             assertThat(apidocs.resolve("stylesheet.css")).exists();
         }
 
         if (JavaVersion.JAVA_VERSION.isAtLeast("10")) {
             assertThat(apidocs.resolve("element-list")).exists();
         } else {
             assertThat(apidocs.resolve("package-list")).exists();
         }
     }
 
     /**
      * Method for testing the subpackages and excludePackageNames parameter
      *
      * @throws Exception if any
      */
     public void testSubpackages() throws Exception {
         Path testPom = unit.resolve("subpackages-test/subpackages-test-plugin-config.xml");
         JavadocReport mojo = lookupMojo(testPom);
         mojo.execute();
 
         Path apidocs = new File(getBasedir(), "target/test/unit/subpackages-test/target/site/apidocs").toPath();
 
         // check the excluded packages
         assertThat(apidocs.resolve("subpackages/test/excluded")).doesNotExist();
         assertThat(apidocs.resolve("subpackages/test/included/exclude")).doesNotExist();
 
         // check if the classes in the specified subpackages were included
         assertThat(apidocs.resolve("subpackages/test/App.html")).exists();
         assertThat(apidocs.resolve("subpackages/test/AppSample.html")).exists();
         assertThat(apidocs.resolve("subpackages/test/included/IncludedApp.html"))
                 .exists();
         assertThat(apidocs.resolve("subpackages/test/included/IncludedAppSample.html"))
                 .exists();
     }
 
     public void testIncludesExcludes() throws Exception {
         Path testPom = unit.resolve("file-include-exclude-test/file-include-exclude-plugin-config.xml");
         JavadocReport mojo = lookupMojo(testPom);
         mojo.execute();
 
         Path apidocs =
                 new File(getBasedir(), "target/test/unit/file-include-exclude-test/target/site/apidocs").toPath();
 
         // check if the classes in the specified subpackages were included
         assertThat(apidocs.resolve("subpackages/test/App.html")).exists();
         assertThat(apidocs.resolve("subpackages/test/AppSample.html")).exists();
         assertThat(apidocs.resolve("subpackages/test/included/IncludedApp.html"))
                 .exists();
         assertThat(apidocs.resolve("subpackages/test/included/IncludedAppSample.html"))
                 .exists();
         assertThat(apidocs.resolve("subpackages/test/PariahApp.html")).doesNotExist();
     }
 
     /**
      * Test the recursion and exclusion of the doc-files subdirectories.
      *
      * @throws Exception if any
      */
     public void testDocfiles() throws Exception {
         // Should be an assumption, but not supported by TestCase
         // Seems like a bug in Javadoc 9 and above
         if (JavaVersion.JAVA_SPECIFICATION_VERSION.isAtLeast("9")) {
             return;
         }
 
         Path testPom = unit.resolve("docfiles-test/docfiles-test-plugin-config.xml");
         JavadocReport mojo = lookupMojo(testPom);
         mojo.execute();
 
         Path apidocs = new File(getBasedir(), "target/test/unit/docfiles-test/target/site/apidocs/").toPath();
 
         // check if the doc-files subdirectories were copied
         assertThat(apidocs.resolve("docfiles/test/doc-files")).exists();
         assertThat(apidocs.resolve("docfiles/test/doc-files/included-dir1/sample-included1.gif"))
                 .exists();
         assertThat(apidocs.resolve("docfiles/test/doc-files/included-dir2/sample-included2.gif"))
                 .exists();
         assertThat(apidocs.resolve("docfiles/test/doc-files/excluded-dir1")).doesNotExist();
         assertThat(apidocs.resolve("docfiles/test/doc-files/excluded-dir2")).doesNotExist();
 
         testPom = unit.resolve("docfiles-with-java-test/docfiles-with-java-test-plugin-config.xml");
         mojo = lookupMojo(testPom);
         mojo.execute();
     }
 
     /**
      * Test javadoc plugin using custom configuration. noindex, notree and nodeprecated parameters
      * were set to true.
      *
      * @throws Exception if any
      */
     public void testCustomConfiguration() throws Exception {
         Path testPom = unit.resolve("custom-configuration/custom-configuration-plugin-config.xml");
         JavadocReport mojo = lookupMojo(testPom);
         mojo.execute();
 
         Path apidocs = new File(getBasedir(), "target/test/unit/custom-configuration/target/site/apidocs").toPath();
 
         // check if there is a tree page generated (notree == true)
         assertThat(apidocs.resolve("overview-tree.html")).doesNotExist();
         assertThat(apidocs.resolve("custom/configuration/package-tree.html")).doesNotExist();
 
         // check if the main index page was generated (noindex == true)
         assertThat(apidocs.resolve("index-all.html")).doesNotExist();
 
         // check if the deprecated list and the deprecated api were generated (nodeprecated == true)
         // @todo Fix: the class-use of the deprecated api is still created eventhough the deprecated api of that class
         // is no longer generated
         assertThat(apidocs.resolve("deprecated-list.html")).doesNotExist();
         assertThat(apidocs.resolve("custom/configuration/App.html")).doesNotExist();
 
         // read the contents of the html files based on some of the parameter values
         // author == false
         String str = readFile(apidocs.resolve("custom/configuration/AppSample.html"));
         assertFalse(str.toLowerCase(Locale.ENGLISH).contains("author"));
 
         // bottom
         assertTrue(str.toUpperCase(Locale.ENGLISH).contains("SAMPLE BOTTOM CONTENT"));
 
         // offlineLinks
         if (JavaVersion.JAVA_VERSION.isBefore("11.0.2")) {
             assertThat(str)
                     .containsIgnoringCase("href=\"http://java.sun.com/j2se/1.4.2/docs/api/java/lang/string.html");
         } else {
             assertTrue(str.toLowerCase(Locale.ENGLISH)
                     .contains("href=\"http://java.sun.com/j2se/1.4.2/docs/api/java.base/java/lang/string.html"));
         }
 
         // header
         assertTrue(str.toUpperCase(Locale.ENGLISH).contains("MAVEN JAVADOC PLUGIN TEST"));
 
         // footer
         if (JavaVersion.JAVA_VERSION.isBefore("16-ea")
                 && !System.getProperty("java.vm.name").contains("OpenJ9")) {
             assertTrue(str.toUpperCase(Locale.ENGLISH).contains("MAVEN JAVADOC PLUGIN TEST FOOTER"));
         }
 
         // nohelp == true
         assertFalse(str.toUpperCase(Locale.ENGLISH).contains("/HELP-DOC.HTML"));
 
         // check the wildcard (*) package exclusions -- excludePackageNames parameter
         assertThat(apidocs.resolve("custom/configuration/exclude1/Exclude1App.html"))
                 .exists();
         assertThat(apidocs.resolve("custom/configuration/exclude1/subexclude/SubexcludeApp.html"))
                 .doesNotExist();
         assertThat(apidocs.resolve("custom/configuration/exclude2/Exclude2App.html"))
                 .doesNotExist();
 
         assertThat(apidocs.resolve("options")).isRegularFile();
 
         String contentOptions = new String(Files.readAllBytes(apidocs.resolve("options")), StandardCharsets.UTF_8);
 
         assertNotNull(contentOptions);
         assertThat(contentOptions).contains("-link").contains("http://java.sun.com/j2se/");
     }
 
     /**
      * Method to test the doclet artifact configuration
      *
      * @throws Exception if any
      */
     public void testDoclets() throws Exception {
         if (JavaVersion.JAVA_SPECIFICATION_VERSION.isAtLeast("13")) {
             // As of JDK 13, the com.sun.javadoc API is no longer supported.
             return;
         }
 
         // ----------------------------------------------------------------------
         // doclet-test: check if the file generated by UmlGraph exists and if
         // doclet path contains the UmlGraph artifact
         // ----------------------------------------------------------------------
 
         Path testPom = unit.resolve("doclet-test/doclet-test-plugin-config.xml");
         JavadocReport mojo = lookupMojo(testPom);
 
         MavenSession session = spy(newMavenSession(mojo.project));
         ProjectBuildingRequest buildingRequest = mock(ProjectBuildingRequest.class);
         when(buildingRequest.getRemoteRepositories()).thenReturn(mojo.project.getRemoteArtifactRepositories());
         when(session.getProjectBuildingRequest()).thenReturn(buildingRequest);
         DefaultRepositorySystemSession repositorySession = new DefaultRepositorySystemSession();
         repositorySession.setLocalRepositoryManager(new SimpleLocalRepositoryManagerFactory()
                 .newInstance(repositorySession, new LocalRepository(localRepo)));
         when(buildingRequest.getRepositorySession()).thenReturn(repositorySession);
         when(session.getRepositorySession()).thenReturn(repositorySession);
         LegacySupport legacySupport = lookup(LegacySupport.class);
         legacySupport.setSession(session);
 
         setVariableValueToObject(mojo, "session", session);
         setVariableValueToObject(mojo, "repoSession", repositorySession);
         mojo.execute();
 
         Path generatedFile =
                 new File(getBasedir(), "target/test/unit/doclet-test/target/site/apidocs/graph.dot").toPath();
         assertThat(generatedFile).exists();
 
         Path optionsFile = new File(mojo.getPluginReportOutputDirectory(), "options").toPath();
         assertThat(optionsFile).exists();
         String options = readFile(optionsFile);
         assertThat(options).contains("/target/local-repo/umlgraph/UMLGraph/2.1/UMLGraph-2.1.jar");
 
         // ----------------------------------------------------------------------
         // doclet-path: check if the file generated by UmlGraph exists and if
         // doclet path contains the twice UmlGraph artifacts
         // ----------------------------------------------------------------------
 
         testPom = unit.resolve("doclet-path-test/doclet-path-test-plugin-config.xml");
         mojo = lookupMojo(testPom);
         setVariableValueToObject(mojo, "session", session);
         setVariableValueToObject(mojo, "repoSession", repositorySession);
         mojo.execute();
 
         generatedFile = new File(getBasedir(), "target/test/unit/doclet-test/target/site/apidocs/graph.dot").toPath();
         assertThat(generatedFile).exists();
 
         optionsFile = new File(mojo.getPluginReportOutputDirectory(), "options").toPath();
         assertThat(optionsFile).exists();
         options = readFile(optionsFile);
         assertThat(options)
                 .contains("/target/local-repo/umlgraph/UMLGraph/2.1/UMLGraph-2.1.jar")
                 .contains("/target/local-repo/umlgraph/UMLGraph-bis/2.1/UMLGraph-bis-2.1.jar");
     }
 
     /**
      * Method to test when the path to the project sources has an apostrophe (')
      *
      * @throws Exception if any
      */
     public void testQuotedPath() throws Exception {
         Path testPom = unit.resolve("quotedpath'test/quotedpath-test-plugin-config.xml");
         JavadocReport mojo = lookupMojo(testPom);
         mojo.execute();
 
         Path apidocs = new File(getBasedir(), "target/test/unit/quotedpath'test/target/site/apidocs").toPath();
 
         // package level generated javadoc files
         assertThat(apidocs.resolve("quotedpath/test/App.html")).exists();
         assertThat(apidocs.resolve("quotedpath/test/AppSample.html")).exists();
 
         // project level generated javadoc files
         assertThat(apidocs.resolve("index-all.html")).exists();
         assertThat(apidocs.resolve("index.html")).exists();
         assertThat(apidocs.resolve("overview-tree.html")).exists();
         if (JavaVersion.JAVA_VERSION.isAtLeast("23")) {
             assertThat(apidocs.resolve("resource-files/stylesheet.css")).exists();
         } else {
             assertThat(apidocs.resolve("stylesheet.css")).exists();
         }
 
         if (JavaVersion.JAVA_VERSION.isBefore("10")) {
             assertThat(apidocs.resolve("package-list")).exists();
         } else {
             assertThat(apidocs.resolve("element-list")).exists();
         }
     }
 
     /**
      * Method to test when the options file has umlauts.
      *
      * @throws Exception if any
      */
     public void testOptionsUmlautEncoding() throws Exception {
         Path testPom = unit.resolve("optionsumlautencoding-test/optionsumlautencoding-test-plugin-config.xml");
         JavadocReport mojo = lookupMojo(testPom);
         mojo.execute();
 
         Path optionsFile = new File(mojo.getPluginReportOutputDirectory(), "options").toPath();
         assertThat(optionsFile).exists();
 
         // check for a part of the window title
         String content;
         String expected;
         if (JavaVersion.JAVA_VERSION.isAtLeast("9") && JavaVersion.JAVA_VERSION.isBefore("12")) {
             content = readFile(optionsFile, StandardCharsets.UTF_8);
             expected = OPTIONS_UMLAUT_ENCODING;
         } else {
             content = readFile(optionsFile, Charset.defaultCharset());
             expected = new String(OPTIONS_UMLAUT_ENCODING.getBytes(Charset.defaultCharset()));
         }
 
         assertThat(content).contains(expected);
 
         Path apidocs =
                 new File(getBasedir(), "target/test/unit/optionsumlautencoding-test/target/site/apidocs").toPath();
 
         // package level generated javadoc files
         assertThat(apidocs.resolve("optionsumlautencoding/test/App.html")).exists();
         assertThat(apidocs.resolve("optionsumlautencoding/test/AppSample.html")).exists();
 
         // project level generated javadoc files
         assertThat(apidocs.resolve("index-all.html")).exists();
         assertThat(apidocs.resolve("index.html")).exists();
         assertThat(apidocs.resolve("overview-tree.html")).exists();
         if (JavaVersion.JAVA_VERSION.isAtLeast("23")) {
             assertThat(apidocs.resolve("resource-files/stylesheet.css")).exists();
         } else {
             assertThat(apidocs.resolve("stylesheet.css")).exists();
         }
 
         if (JavaVersion.JAVA_VERSION.isBefore("10")) {
             assertThat(apidocs.resolve("package-list")).exists();
         } else {
             assertThat(apidocs.resolve("element-list")).exists();
         }
     }
 
     /**
      * Method to test the taglet artifact configuration
      *
      * @throws Exception if any
      */
     public void testTaglets() throws Exception {
         // ----------------------------------------------------------------------
         // taglet-test: check if a taglet is used
         // ----------------------------------------------------------------------
 
         // Should be an assumption, but not supported by TestCase
         // com.sun.tools.doclets.Taglet not supported by Java9 anymore
         // Should be refactored with jdk.javadoc.doclet.Taglet
         if (JavaVersion.JAVA_SPECIFICATION_VERSION.isAtLeast("10")) {
             return;
         }
 
         Path testPom = unit.resolve("taglet-test/taglet-test-plugin-config.xml");
         JavadocReport mojo = lookupMojo(testPom);
 
         MavenSession session = spy(newMavenSession(mojo.project));
         ProjectBuildingRequest buildingRequest = mock(ProjectBuildingRequest.class);
         when(buildingRequest.getRemoteRepositories()).thenReturn(mojo.project.getRemoteArtifactRepositories());
         when(session.getProjectBuildingRequest()).thenReturn(buildingRequest);
         DefaultRepositorySystemSession repositorySession = new DefaultRepositorySystemSession();
         repositorySession.setLocalRepositoryManager(new SimpleLocalRepositoryManagerFactory()
                 .newInstance(repositorySession, new LocalRepository(localRepo)));
         when(buildingRequest.getRepositorySession()).thenReturn(repositorySession);
         when(session.getRepositorySession()).thenReturn(repositorySession);
         LegacySupport legacySupport = lookup(LegacySupport.class);
         legacySupport.setSession(session);
 
         setVariableValueToObject(mojo, "session", session);
         setVariableValueToObject(mojo, "repoSession", repositorySession);
 
         mojo.execute();
 
         Path apidocs = new File(getBasedir(), "target/test/unit/taglet-test/target/site/apidocs").toPath();
 
         assertThat(apidocs.resolve("index.html")).exists();
 
         Path appFile = apidocs.resolve("taglet/test/App.html");
         assertThat(appFile).exists();
         String appString = readFile(appFile);
         assertThat(appString).contains("<b>To Do:</b>");
     }
 
     /**
      * Method to test the jdk5 javadoc
      *
      * @throws Exception if any
      */
     public void testJdk5() throws Exception {
         // Should be an assumption, but not supported by TestCase
         // Java 5 not supported by Java9 anymore
         if (JavaVersion.JAVA_SPECIFICATION_VERSION.isAtLeast("9")) {
             return;
         }
 
         Path testPom = unit.resolve("jdk5-test/jdk5-test-plugin-config.xml");
         JavadocReport mojo = lookupMojo(testPom);
         mojo.execute();
 
         Path apidocs = new File(getBasedir(), "target/test/unit/jdk5-test/target/site/apidocs").toPath();
 
         assertThat(apidocs.resolve("index.html")).exists();
 
         Path overviewSummary = apidocs.resolve("overview-summary.html");
         assertThat(overviewSummary).exists();
         String content = readFile(overviewSummary);
         assertThat(content).contains("<b>Test the package-info</b>");
 
         Path packageSummary = apidocs.resolve("jdk5/test/package-summary.html");
         assertThat(packageSummary).exists();
         content = readFile(packageSummary);
         assertThat(content).contains("<b>Test the package-info</b>");
     }
 
     /**
      * Test to find the javadoc executable when <code>java.home</code> is not in the JDK_HOME. In this case, try to
      * use the <code>JAVA_HOME</code> environment variable.
      *
      * @throws Exception if any
      */
     public void testToFindJavadoc() throws Exception {
         String oldJreHome = System.getProperty("java.home");
         System.setProperty("java.home", "foo/bar");
 
         Path testPom = unit.resolve("javaHome-test/javaHome-test-plugin-config.xml");
         JavadocReport mojo = lookupMojo(testPom);
         mojo.execute();
 
         System.setProperty("java.home", oldJreHome);
     }
 
     /**
      * Test the javadoc resources.
      *
      * @throws Exception if any
      */
     public void testJavadocResources() throws Exception {
         Path testPom = unit.resolve("resources-test/resources-test-plugin-config.xml");
         JavadocReport mojo = lookupMojo(testPom);
         mojo.execute();
 
         Path apidocs = new File(getBasedir(), "target/test/unit/resources-test/target/site/apidocs/").toPath();
 
         Path app = apidocs.resolve("resources/test/App.html");
         assertThat(app).exists();
         String content = readFile(app);
         assertThat(content).contains("<img src=\"doc-files/maven-feather.png\" alt=\"Maven\">");
         assertThat(apidocs.resolve("resources/test/doc-files/maven-feather.png"))
                 .exists();
 
         Path app2 = apidocs.resolve("resources/test2/App2.html");
         assertThat(app2).exists();
         content = readFile(app2);
         assertThat(content).contains("<img src=\"doc-files/maven-feather.png\" alt=\"Maven\">");
         assertThat(apidocs.resolve("resources/test2/doc-files/maven-feather.png"))
                 .doesNotExist();
 
         // with excludes
         testPom = unit.resolve("resources-with-excludes-test/resources-with-excludes-test-plugin-config.xml");
         mojo = lookupMojo(testPom);
         mojo.execute();
 
         apidocs = new File(getBasedir(), "target/test/unit/resources-with-excludes-test/target/site/apidocs").toPath();
 
         app = apidocs.resolve("resources/test/App.html");
         assertThat(app).exists();
         content = readFile(app);
         assertThat(content).contains("<img src=\"doc-files/maven-feather.png\" alt=\"Maven\">");
 
         JavaVersion javadocVersion = (JavaVersion) getVariableValueFromObject(mojo, "javadocRuntimeVersion");
         if (javadocVersion.isAtLeast("1.8") /* && javadocVersion.isBefore( "14" ) */) {
             // https://bugs.openjdk.java.net/browse/JDK-8032205
             assertThat(apidocs.resolve("resources/test/doc-files/maven-feather.png"))
                     .as("Javadoc runtime version: " + javadocVersion
                             + "\nThis bug appeared in JDK8 and was planned to be fixed in JDK9, see JDK-8032205")
                     .exists();
         } else {
             assertThat(apidocs.resolve("resources/test/doc-files/maven-feather.png"))
                     .doesNotExist();
         }
         assertThat(apidocs.resolve("resources/test2/doc-files/maven-feather.png"))
                 .exists();
 
         app2 = apidocs.resolve("resources/test2/App2.html");
         assertThat(app2).exists();
         content = readFile(app2);
         assertThat(content).contains("<img src=\"doc-files/maven-feather.png\" alt=\"Maven\">");
         assertThat(apidocs.resolve("resources/test2/doc-files/maven-feather.png"))
                 .exists();
     }
 
     /**
      * Test the javadoc for a POM project.
      *
      * @throws Exception if any
      */
     public void testPom() throws Exception {
         Path testPom = unit.resolve("pom-test/pom-test-plugin-config.xml");
         JavadocReport mojo = lookupMojo(testPom);
         mojo.execute();
 
         assertThat(new File(getBasedir(), "target/test/unit/pom-test/target/site"))
                 .doesNotExist();
     }
 
     /**
      * Test the javadoc with tag.
      *
      * @throws Exception if any
      */
     public void testTag() throws Exception {
         Path testPom = unit.resolve("tag-test/tag-test-plugin-config.xml");
         JavadocReport mojo = lookupMojo(testPom);
         mojo.execute();
 
         Path app = new File(getBasedir(), "target/test/unit/tag-test/target/site/apidocs/tag/test/App.html").toPath();
         assertThat(app).exists();
         String readed = readFile(app);
         assertThat(readed).contains(">To do something:</").contains(">Generator Class:</");
 
         // In javadoc-options-javadoc-resources.xml tag 'version' has only a name,
         // which is not enough for Java 11 anymore
         if (JavaVersion.JAVA_SPECIFICATION_VERSION.isBefore("11")) {
             assertThat(readed).contains(">Version:</");
             assertTrue(readed.toLowerCase(Locale.ENGLISH).contains("</dt>" + LINE_SEPARATOR + "  <dd>1.0</dd>")
                     || readed.toLowerCase(Locale.ENGLISH)
                             .contains("</dt>" + LINE_SEPARATOR + "<dd>1.0</dd>" /* JDK 8 */));
         }
     }
 
     /**
      * Test newline in the header/footer parameter
      *
      * @throws Exception if any
      */
     public void testHeaderFooter() throws Exception {
         Path testPom = unit.resolve("header-footer-test/header-footer-test-plugin-config.xml");
         JavadocReport mojo = lookupMojo(testPom);
         try {
             mojo.execute();
         } catch (MojoExecutionException e) {
             fail("Doesnt handle correctly newline for header or footer parameter");
         }
     }
 
     /**
      * Test newline in various string parameters
      *
      * @throws Exception if any
      */
     public void testNewline() throws Exception {
         Path testPom = unit.resolve("newline-test/newline-test-plugin-config.xml");
         JavadocReport mojo = lookupMojo(testPom);
         try {
             mojo.execute();
         } catch (MojoExecutionException e) {
             fail("Doesn't handle correctly newline for string parameters. See options and packages files.");
         }
     }
 
     /**
      * Method to test the jdk6 javadoc
      *
      * @throws Exception if any
      */
     public void testJdk6() throws Exception {
         // Should be an assumption, but not supported by TestCase
         // Java 6 not supported by Java 12 anymore
         if (JavaVersion.JAVA_SPECIFICATION_VERSION.isAtLeast("12")) {
             return;
         }
 
         Path testPom = unit.resolve("jdk6-test/jdk6-test-plugin-config.xml");
         JavadocReport mojo = lookupMojo(testPom);
         mojo.execute();
 
         Path apidocs = new File(getBasedir(), "target/test/unit/jdk6-test/target/site/apidocs").toPath();
         assertThat(apidocs.resolve("index.html")).exists();
 
         Path overview;
         if (JavaVersion.JAVA_SPECIFICATION_VERSION.isBefore("11")) {
             overview = apidocs.resolve("overview-summary.html");
         } else {
             overview = apidocs.resolve("index.html");
         }
 
         assertThat(overview).exists();
         String content = readFile(overview);
         assertThat(content)
                 .contains("Top - Copyright &#169; All rights reserved.")
                 .contains("Header - Copyright &#169; All rights reserved.");
         // IBM dist of adopt-openj9 does not support the footer param
         if (!System.getProperty("java.vm.name").contains("OpenJ9")) {
             assertThat(content).contains("Footer - Copyright &#169; All rights reserved.");
         }
 
         Path packageSummary = apidocs.resolve("jdk6/test/package-summary.html");
         assertThat(packageSummary).exists();
         content = readFile(packageSummary);
         assertThat(content)
                 .contains("Top - Copyright &#169; All rights reserved.")
                 .contains("Header - Copyright &#169; All rights reserved.");
 
         // IBM dist of adopt-openj9 does not support the footer param
         if (!System.getProperty("java.vm.name").contains("OpenJ9")) {
             assertThat(content).contains("Footer - Copyright &#169; All rights reserved.");
         }
     }
 
     /**
      * Method to test proxy support in the javadoc
      *
      * @throws Exception if any
      */
     public void testProxy() throws Exception {
         Settings settings = new Settings();
         Proxy proxy = new Proxy();
 
         // dummy proxy
         proxy.setActive(true);
         proxy.setHost("127.0.0.1");
         proxy.setPort(80);
         proxy.setProtocol("http");
         proxy.setUsername("toto");
         proxy.setPassword("toto");
         proxy.setNonProxyHosts("www.google.com|*.somewhere.com");
         settings.addProxy(proxy);
 
         Path testPom =
                 new File(getBasedir(), "src/test/resources/unit/proxy-test/proxy-test-plugin-config.xml").toPath();
         JavadocReport mojo = lookupMojo(testPom);
 
         MavenSession session = spy(newMavenSession(mojo.project));
         ProjectBuildingRequest buildingRequest = mock(ProjectBuildingRequest.class);
         when(buildingRequest.getRemoteRepositories()).thenReturn(mojo.project.getRemoteArtifactRepositories());
         when(buildingRequest.getRepositoryMerging()).thenReturn(RepositoryMerging.POM_DOMINANT);
         when(session.getProjectBuildingRequest()).thenReturn(buildingRequest);
         DefaultRepositorySystemSession repositorySession = new DefaultRepositorySystemSession();
         repositorySession.setLocalRepositoryManager(new SimpleLocalRepositoryManagerFactory()
                 .newInstance(repositorySession, new LocalRepository(localRepo)));
         when(buildingRequest.getRepositorySession()).thenReturn(repositorySession);
         when(session.getRepositorySession()).thenReturn(repositorySession);
         LegacySupport legacySupport = lookup(LegacySupport.class);
         legacySupport.setSession(session);
 
         setVariableValueToObject(mojo, "settings", settings);
         setVariableValueToObject(mojo, "session", session);
         setVariableValueToObject(mojo, "repoSession", repositorySession);
         mojo.execute();
 
         Path commandLine = new File(
                         getBasedir(),
                         "target/test/unit/proxy-test/target/site/apidocs/javadoc."
                                 + (SystemUtils.IS_OS_WINDOWS ? "bat" : "sh"))
                 .toPath();
         assertThat(commandLine).exists();
         String readed = readFile(commandLine);
         assertThat(readed).contains("-J-Dhttp.proxyHost=127.0.0.1").contains("-J-Dhttp.proxyPort=80");
         if (SystemUtils.IS_OS_WINDOWS) {
             assertThat(readed).contains(" -J-Dhttp.nonProxyHosts=\"www.google.com^|*.somewhere.com\" ");
         } else {
             assertThat(readed).contains(" \"-J-Dhttp.nonProxyHosts=\\\"www.google.com^|*.somewhere.com\\\"\" ");
         }
 
         Path options = new File(getBasedir(), "target/test/unit/proxy-test/target/site/apidocs/options").toPath();
         assertThat(options).exists();
         String optionsContent = readFile(options);
         // NO -link expected
         assertThat(optionsContent).doesNotContain("-link");
 
         // real proxy
         ProxyServer proxyServer = null;
         AuthAsyncProxyServlet proxyServlet;
         try {
             proxyServlet = new AuthAsyncProxyServlet();
             proxyServer = new ProxyServer(proxyServlet);
             proxyServer.start();
 
             settings = new Settings();
             proxy = new Proxy();
             proxy.setActive(true);
             proxy.setHost(proxyServer.getHostName());
             proxy.setPort(proxyServer.getPort());
             proxy.setProtocol("http");
             settings.addProxy(proxy);
 
             mojo = lookupMojo(testPom);
             setVariableValueToObject(mojo, "settings", settings);
             setVariableValueToObject(mojo, "session", session);
             setVariableValueToObject(mojo, "repoSession", repositorySession);
             mojo.execute();
             readed = readFile(commandLine);
             assertTrue(readed.contains("-J-Dhttp.proxyHost=" + proxyServer.getHostName()));
             assertTrue(readed.contains("-J-Dhttp.proxyPort=" + proxyServer.getPort()));
 
             optionsContent = readFile(options);
             // -link expected
             // TODO: This got disabled for now!
             // This test fails since the last commit but I actually think it only ever worked by accident.
             // It did rely on a commons-logging-1.0.4.pom which got resolved by a test which did run previously.
             // But after updating to commons-logging.1.1.1 there is no pre-resolved artifact available in
             // target/local-repo anymore, thus the javadoc link info cannot get built and the test fails
             // I'll for now just disable this line of code, because the test as far as I can see _never_
             // did go upstream. The remoteRepository list used is always empty!.
             //
             //            assertTrue( optionsContent.contains( "-link 'http://commons.apache.org/logging/apidocs'" ) );
         } finally {
             if (proxyServer != null) {
                 proxyServer.stop();
             }
         }
 
         // auth proxy
         Map<String, String> authentications = new HashMap<>();
         authentications.put("foo", "bar");
         try {
             proxyServlet = new AuthAsyncProxyServlet(authentications);
             proxyServer = new ProxyServer(proxyServlet);
             proxyServer.start();
 
             settings = new Settings();
             proxy = new Proxy();
             proxy.setActive(true);
             proxy.setHost(proxyServer.getHostName());
             proxy.setPort(proxyServer.getPort());
             proxy.setProtocol("http");
             proxy.setUsername("foo");
             proxy.setPassword("bar");
             settings.addProxy(proxy);
 
             mojo = lookupMojo(testPom);
             setVariableValueToObject(mojo, "settings", settings);
             setVariableValueToObject(mojo, "session", session);
             setVariableValueToObject(mojo, "repoSession", repositorySession);
             mojo.execute();
             readed = readFile(commandLine);
             assertThat(readed)
                     .contains("-J-Dhttp.proxyHost=" + proxyServer.getHostName())
                     .contains("-J-Dhttp.proxyPort=" + proxyServer.getPort());
 
             optionsContent = readFile(options);
             // -link expected
             // see comment above (line 829)
             //             assertTrue( optionsContent.contains( "-link 'http://commons.apache.org/logging/apidocs'" ) );
         } finally {
             if (proxyServer != null) {
                 proxyServer.stop();
             }
         }
     }
 
     /**
      * Method to test error or conflict in Javadoc options and in standard doclet options.
      *
      * @throws Exception if any
      */
     public void testValidateOptions() throws Exception {
         // encoding
         Path testPom = unit.resolve("validate-options-test/wrong-encoding-test-plugin-config.xml");
         JavadocReport mojo = lookupMojo(testPom);
         try {
             mojo.execute();
             fail("No wrong encoding catch");
         } catch (MojoExecutionException e) {
             assertTrue("No wrong encoding catch", e.getMessage().contains("Unsupported option <encoding/>"));
         }
         testPom = unit.resolve("validate-options-test/wrong-docencoding-test-plugin-config.xml");
         mojo = lookupMojo(testPom);
         try {
             mojo.execute();
             fail("No wrong docencoding catch");
         } catch (MojoExecutionException e) {
             assertTrue("No wrong docencoding catch", e.getMessage().contains("Unsupported option <docencoding/>"));
         }
         testPom = unit.resolve("validate-options-test/wrong-charset-test-plugin-config.xml");
         mojo = lookupMojo(testPom);
         try {
             mojo.execute();
             fail("No wrong charset catch");
         } catch (MojoExecutionException e) {
             assertTrue("No wrong charset catch", e.getMessage().contains("Unsupported option <charset/>"));
         }
 
         testPom = unit.resolve("validate-options-test/wrong-locale-with-variant-test-plugin-config.xml");
         mojo = lookupMojo(testPom);
         mojo.execute();
         assertTrue("No wrong locale catch", true);
 
         // conflict options
         testPom = unit.resolve("validate-options-test/conflict-options-test-plugin-config.xml");
         mojo = lookupMojo(testPom);
         try {
             mojo.execute();
             fail("No conflict catch");
         } catch (MojoExecutionException e) {
             assertTrue("No conflict catch", e.getMessage().contains("Option <nohelp/> conflicts with <helpfile/>"));
         }
     }
 
     /**
      * Method to test the <code>&lt;tagletArtifacts/&gt;</code> parameter.
      *
      * @throws Exception if any
      */
     public void testTagletArtifacts() throws Exception {
         // Should be an assumption, but not supported by TestCase
         // com.sun.tools.doclets.Taglet not supported by Java 10 anymore
         if (JavaVersion.JAVA_SPECIFICATION_VERSION.isAtLeast("10")) {
             return;
         }
 
         Path testPom = unit.resolve("tagletArtifacts-test/tagletArtifacts-test-plugin-config.xml");
         JavadocReport mojo = lookupMojo(testPom);
 
         MavenSession session = newMavenSession(mojo.project);
         DefaultRepositorySystemSession repoSysSession = (DefaultRepositorySystemSession) session.getRepositorySession();
         repoSysSession.setLocalRepositoryManager(new SimpleLocalRepositoryManagerFactory()
                 .newInstance(session.getRepositorySession(), new LocalRepository(new File("target/local-repo"))));
         // Ensure remote repo connection uses SSL
         LegacySupport legacySupport = lookup(LegacySupport.class);
         legacySupport.setSession(session);
         setVariableValueToObject(mojo, "session", session);
         setVariableValueToObject(mojo, "repoSession", repoSysSession);
         mojo.execute();
 
         Path optionsFile = new File(mojo.getPluginReportOutputDirectory(), "options").toPath();
         assertThat(optionsFile).exists();
         String options = readFile(optionsFile);
         // count -taglet
         assertThat(StringUtils.countMatches(options, LINE_SEPARATOR + "-taglet" + LINE_SEPARATOR))
                 .isEqualTo(3);
         assertThat(options)
                 .contains("org.codehaus.plexus.javadoc.PlexusConfigurationTaglet")
                 .contains("org.codehaus.plexus.javadoc.PlexusRequirementTaglet")
                 .contains("org.codehaus.plexus.javadoc.PlexusComponentTaglet");
     }
 
     /**
      * Method to test the <code>&lt;stylesheetfile/&gt;</code> parameter.
      *
      * @throws Exception if any
      */
     public void testStylesheetfile() throws Exception {
         Path testPom = unit.resolve("stylesheetfile-test/pom.xml");
 
         JavadocReport mojo = lookupMojo(testPom);
         assertNotNull(mojo);
 
         MavenSession session = spy(newMavenSession(mojo.project));
         ProjectBuildingRequest buildingRequest = mock(ProjectBuildingRequest.class);
         when(buildingRequest.getRemoteRepositories()).thenReturn(mojo.project.getRemoteArtifactRepositories());
         when(session.getProjectBuildingRequest()).thenReturn(buildingRequest);
         DefaultRepositorySystemSession repositorySession = new DefaultRepositorySystemSession();
         repositorySession.setLocalRepositoryManager(new SimpleLocalRepositoryManagerFactory()
                 .newInstance(repositorySession, new LocalRepository(localRepo)));
         when(buildingRequest.getRepositorySession()).thenReturn(repositorySession);
         when(session.getRepositorySession()).thenReturn(repositorySession);
         LegacySupport legacySupport = lookup(LegacySupport.class);
         legacySupport.setSession(session);
         setVariableValueToObject(mojo, "session", session);
         setVariableValueToObject(mojo, "repoSession", repositorySession);
 
         Path apidocs = new File(getBasedir(), "target/test/unit/stylesheetfile-test/target/site/apidocs").toPath();
 
         Path stylesheetfile = apidocs.resolve("stylesheet.css");
         if (JavaVersion.JAVA_VERSION.isAtLeast("23")) {
             stylesheetfile = apidocs.resolve("resource-files/stylesheet.css");
         }
         Path options = apidocs.resolve("options");
 
         // stylesheet == maven OR java
         setVariableValueToObject(mojo, "stylesheet", "javamaven");
 
         try {
             mojo.execute();
             fail();
         } catch (MojoExecutionException | MojoFailureException e) {
         }
 
         // stylesheet == java
         setVariableValueToObject(mojo, "stylesheet", "java");
         mojo.execute();
 
         String content = readFile(stylesheetfile);
         if (JavaVersion.JAVA_VERSION.isAtLeast("13-ea")) {
             assertTrue(content.contains("/*" + LINE_SEPARATOR + " * Javadoc style sheet" + LINE_SEPARATOR + " */"));
         } else if (JavaVersion.JAVA_VERSION.isAtLeast("10")) {
             assertTrue(content.contains("/* " + LINE_SEPARATOR + " * Javadoc style sheet" + LINE_SEPARATOR + " */"));
         } else {
             assertTrue(content.contains("/* Javadoc style sheet */"));
         }
 
         String optionsContent = readFile(options);
         assertFalse(optionsContent.contains("-stylesheetfile"));
 
         // stylesheetfile defined as a project resource
         setVariableValueToObject(mojo, "stylesheet", null);
         setVariableValueToObject(mojo, "stylesheetfile", "com/mycompany/app/javadoc/css/stylesheet.css");
         mojo.execute();
 
         content = readFile(stylesheetfile);
         assertTrue(content.contains("/* Custom Javadoc style sheet in project */"));
 
         optionsContent = readFile(options);
         assertTrue(optionsContent.contains("-stylesheetfile"));
         Path stylesheetResource =
                 unit.resolve("stylesheetfile-test/src/main/resources/com/mycompany/app/javadoc/css/stylesheet.css");
         assertTrue(optionsContent.contains(
                 "'" + stylesheetResource.toFile().getAbsolutePath().replaceAll("\\\\", "/") + "'"));
 
         // stylesheetfile defined in a javadoc plugin dependency
         setVariableValueToObject(mojo, "stylesheetfile", "com/mycompany/app/javadoc/css2/stylesheet.css");
         mojo.execute();
 
         content = readFile(stylesheetfile);
         assertTrue(content.contains("/* Custom Javadoc style sheet in artefact */"));
 
         optionsContent = readFile(options);
         assertTrue(optionsContent.contains("-stylesheetfile"));
 
         assertThat(optionsContent)
                 .contains("'" + stylesheetfile.toFile().getAbsolutePath().replaceAll("\\\\", "/") + "'");
 
         // stylesheetfile defined as file
         Path css = unit.resolve("stylesheetfile-test/src/main/resources/com/mycompany/app/javadoc/css3/stylesheet.css");
         setVariableValueToObject(mojo, "stylesheetfile", css.toFile().getAbsolutePath());
         mojo.execute();
 
         content = readFile(stylesheetfile);
         assertTrue(content.contains("/* Custom Javadoc style sheet as file */"));
 
         optionsContent = readFile(options);
         assertTrue(optionsContent.contains("-stylesheetfile"));
         stylesheetResource =
                 unit.resolve("stylesheetfile-test/src/main/resources/com/mycompany/app/javadoc/css3/stylesheet.css");
         assertTrue(optionsContent.contains(
                 "'" + stylesheetResource.toFile().getAbsolutePath().replaceAll("\\\\", "/") + "'"));
     }
 
     /**
      * Method to test the <code>&lt;helpfile/&gt;</code> parameter.
      *
      * @throws Exception if any
      */
     public void testHelpfile() throws Exception {
         Path testPom = unit.resolve("helpfile-test/pom.xml");
 
         JavadocReport mojo = lookupMojo(testPom);
         assertNotNull(mojo);
 
         MavenSession session = spy(newMavenSession(mojo.project));
         ProjectBuildingRequest buildingRequest = mock(ProjectBuildingRequest.class);
         when(buildingRequest.getRemoteRepositories()).thenReturn(mojo.project.getRemoteArtifactRepositories());
         when(session.getProjectBuildingRequest()).thenReturn(buildingRequest);
         DefaultRepositorySystemSession repositorySession = new DefaultRepositorySystemSession();
         repositorySession.setLocalRepositoryManager(new SimpleLocalRepositoryManagerFactory()
                 .newInstance(repositorySession, new LocalRepository(localRepo)));
         when(buildingRequest.getRepositorySession()).thenReturn(repositorySession);
         when(session.getRepositorySession()).thenReturn(repositorySession);
         LegacySupport legacySupport = lookup(LegacySupport.class);
         legacySupport.setSession(session);
         setVariableValueToObject(mojo, "session", session);
         setVariableValueToObject(mojo, "repoSession", repositorySession);
 
         Path apidocs = new File(getBasedir(), "target/test/unit/helpfile-test/target/site/apidocs").toPath();
 
         Path helpfile = apidocs.resolve("help-doc.html");
         Path options = apidocs.resolve("options");
 
         // helpfile by default
         mojo.execute();
 
         String content = readFile(helpfile);
         assertTrue(content.contains("<!-- Generated by javadoc"));
 
         String optionsContent = readFile(options);
         assertFalse(optionsContent.contains("-helpfile"));
 
         // helpfile defined in a javadoc plugin dependency
         setVariableValueToObject(mojo, "helpfile", "com/mycompany/app/javadoc/helpfile/help-doc.html");
 
         setVariableValueToObject(mojo, "session", session);
         setVariableValueToObject(mojo, "repoSession", repositorySession);
 
         mojo.execute();
 
         content = readFile(helpfile);
         assertTrue(content.contains("<!--  Help file from artefact -->"));
 
         optionsContent = readFile(options);
         assertTrue(optionsContent.contains("-helpfile"));
         Path help = apidocs.resolve("help-doc.html");
         assertTrue(optionsContent.contains("'" + help.toFile().getAbsolutePath().replaceAll("\\\\", "/") + "'"));
 
         // helpfile defined as a project resource
         setVariableValueToObject(mojo, "helpfile", "com/mycompany/app/javadoc/helpfile2/help-doc.html");
         mojo.execute();
 
         content = readFile(helpfile);
         assertTrue(content.contains("<!--  Help file from file -->"));
 
         optionsContent = readFile(options);
         assertTrue(optionsContent.contains("-helpfile"));
         help = unit.resolve("helpfile-test/src/main/resources/com/mycompany/app/javadoc/helpfile2/help-doc.html");
         assertTrue(optionsContent.contains("'" + help.toFile().getAbsolutePath().replaceAll("\\\\", "/") + "'"));
 
         // helpfile defined as file
         help = unit.resolve("helpfile-test/src/main/resources/com/mycompany/app/javadoc/helpfile2/help-doc.html");
         setVariableValueToObject(mojo, "helpfile", help.toFile().getAbsolutePath());
         mojo.execute();
 
         content = readFile(helpfile);
         assertTrue(content.contains("<!--  Help file from file -->"));
 
         optionsContent = readFile(options);
         assertTrue(optionsContent.contains("-helpfile"));
         assertTrue(optionsContent.contains("'" + help.toFile().getAbsolutePath().replaceAll("\\\\", "/") + "'"));
     }
 }