package org.apache.maven.plugin.failsafe;

/*
 * 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.
 */

import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugin.MojoFailureException;
import org.apache.maven.plugin.surefire.AbstractSurefireMojo;
import org.apache.maven.plugin.surefire.booterclient.ChecksumCalculator;
import org.apache.maven.plugins.annotations.LifecyclePhase;
import org.apache.maven.plugins.annotations.Mojo;
import org.apache.maven.plugins.annotations.Parameter;
import org.apache.maven.plugins.annotations.ResolutionScope;
import org.apache.maven.surefire.suite.RunResult;

import java.io.File;
import java.io.IOException;
import java.nio.charset.Charset;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Locale;

import static org.apache.maven.plugin.failsafe.util.FailsafeSummaryXmlUtils.writeSummary;

/**
 * Run integration tests using Surefire.
 *
 * @author Jason van Zyl
 * @author Stephen Connolly
 */
@Mojo( name = "integration-test", requiresProject = true, requiresDependencyResolution = ResolutionScope.TEST,
             defaultPhase = LifecyclePhase.INTEGRATION_TEST, threadSafe = true )
public class IntegrationTestMojo
        extends AbstractSurefireMojo
{

    private static final String FAILSAFE_IN_PROGRESS_CONTEXT_KEY = "failsafe-in-progress";

    /**
     * The path representing project <em>JAR</em> file, if exists; Otherwise the directory containing generated
     * classes of the project being tested. This will be included after the test classes in the test classpath.
     * Defaults to built artifact <em>JAR</em> file or <code>${project.build.outputDirectory}</code>.
     */
    @Parameter
    private File classesDirectory;

    @Parameter( readonly = true, defaultValue = "${project.build.outputDirectory}" )
    private File defaultClassesDirectory;

    /**
     * Set this to "true" to skip running integration tests, but still compile them. Its use is NOT RECOMMENDED, but
     * quite convenient on occasion.
     *
     * @since 2.4.3-alpha-2
     */
    @Parameter( property = "skipITs" )
    private boolean skipITs;

    /**
     * Base directory where all reports are written to.
     */
    @Parameter( defaultValue = "${project.build.directory}/failsafe-reports" )
    private File reportsDirectory;

    @SuppressWarnings( "checkstyle:linelength" )
    /**
     * Specify this parameter to run individual tests by file name, overriding parameter {@code includes} and
     * {@code excludes}. Each pattern you specify here will be used to create an include pattern formatted like
     * <code>**{@literal /}${it.test}.java</code>, so you can just type {@code -Dit.test=MyIT} to run
     * a single test file called "foo/MyIT.java". The test patterns prefixed with a <em>!</em> will be excluded.
     * <br>
     * This parameter overrides the parameter {@code includes} and {@code excludes}, and the TestNG parameter
     * {@code suiteXmlFiles}.
     * <br>
     * Since 2.7.3 You can execute a limited number of methods in the test with adding <i>#myMethod</i> or
     * <i>#my*ethod</i>. E.g. type {@code -Dit.test=MyIT#myMethod} <b>supported for junit 4.x and TestNg.</b>
     * <br>
     * Since 2.19 a complex syntax is supported in one parameter (JUnit 4, JUnit 4.7+, TestNG):
     * <pre><code>"-Dit.test=???IT, !Unstable*, pkg{@literal /}**{@literal /}Ci*leIT.java, *IT#test*One+testTwo?????, #fast*+slowTest"</code></pre>
     * or e.g.
     * <br>
     * <pre><code>"-Dit.test=Basic*, !%regex[.*.Unstable.*], !%regex[.*.MyIT.class#one.*|two.*], %regex[#fast.*|slow.*]"</code></pre>
     * <br>
     * The Parameterized JUnit runner {@code describes} test methods using an index in brackets, so the non-regex
     * method pattern would become: {@code #testMethod[*]}. If using <code>@Parameters(name="{index}: fib({0})={1}")</code>
     * and selecting the index e.g. 5 in pattern, the non-regex method pattern would become {@code #testMethod[5:*]}.
     */
    @Parameter( property = "it.test" )
    private String test;

    /**
     * The summary file to write integration test results to.
     */
    @Parameter( defaultValue = "${project.build.directory}/failsafe-reports/failsafe-summary.xml", required = true )
    private File summaryFile;

    /**
     * Option to print summary of test suites or just print the test cases that have errors.
     */
    @Parameter( property = "failsafe.printSummary", defaultValue = "true" )
    private boolean printSummary;

    /**
     * Selects the formatting for the test report to be generated. Can be set as "brief" or "plain".
     * Only applies to the output format of the output files  (target/surefire-reports/testName.txt)
     */
    @Parameter( property = "failsafe.reportFormat", defaultValue = "brief" )
    private String reportFormat;

    /**
     * Option to generate a file test report or just output the test report to the console.
     */
    @Parameter( property = "failsafe.useFile", defaultValue = "true" )
    private boolean useFile;

    /**
     * Set this to "true" to cause a failure if none of the tests specified in -Dtest=... are run. Defaults to
     * "true".
     *
     * @since 2.12
     */
    @Parameter( property = "it.failIfNoSpecifiedTests" )
    private Boolean failIfNoSpecifiedTests;

    /**
     * Attach a debugger to the forked JVM. If set to "true", the process will suspend and wait for a debugger to attach
     * on port 5005. If set to some other string, that string will be appended to the argLine, allowing you to configure
     * arbitrary debugging ability options (without overwriting the other options specified through the {@code argLine}
     * parameter).
     *
     * @since 2.4
     */
    @Parameter( property = "maven.failsafe.debug" )
    private String debugForkedProcess;

    /**
     * Kill the forked test process after a certain number of seconds. If set to 0, wait forever for the process, never
     * timing out.
     *
     * @since 2.4
     */
    @Parameter( property = "failsafe.timeout" )
    private int forkedProcessTimeoutInSeconds;

    /**
     * Forked process is normally terminated without any significant delay after given tests have completed.
     * If the particular tests started non-daemon Thread(s), the process hangs instead of been properly terminated
     * by {@code System.exit()}. Use this parameter in order to determine the timeout of terminating the process.
     * <a href="http://maven.apache.org/surefire/maven-failsafe-plugin/examples/shutdown.html">see the documentation:
     * http://maven.apache.org/surefire/maven-failsafe-plugin/examples/shutdown.html</a>
     *
     * @since 2.20
     */
    @Parameter( property = "failsafe.exitTimeout", defaultValue = "30" )
    private int forkedProcessExitTimeoutInSeconds;

    /**
     * Stop executing queued parallel JUnit tests after a certain number of seconds.
     * <br>
     * Example values: "3.5", "4"<br>
     * <br>
     * If set to 0, wait forever, never timing out.
     * Makes sense with specified {@code parallel} different from "none".
     *
     * @since 2.16
     */
    @Parameter( property = "failsafe.parallel.timeout" )
    private double parallelTestsTimeoutInSeconds;

    /**
     * Stop executing queued parallel JUnit tests
     * and <i>interrupt</i> currently running tests after a certain number of seconds.
     * <br>
     * Example values: "3.5", "4"<br>
     * <br>
     * If set to 0, wait forever, never timing out.
     * Makes sense with specified {@code parallel} different from "none".
     *
     * @since 2.16
     */
    @Parameter( property = "failsafe.parallel.forcedTimeout" )
    private double parallelTestsTimeoutForcedInSeconds;

    @SuppressWarnings( "checkstyle:linelength" )
    /**
     * A list of {@literal <include>} elements specifying the test filter (by pattern) of tests which should be
     * included in testing. If it is not specified and the {@code test} parameter is unspecified as well, the default
     * includes is
     * <pre><code>
     * {@literal <includes>}
     *     {@literal <include>}**{@literal /}IT*.java{@literal </include>}
     *     {@literal <include>}**{@literal /}*IT.java{@literal </include>}
     *     {@literal <include>}**{@literal /}*ITCase.java{@literal </include>}
     * {@literal </includes>}
     * </code></pre>
     * <br>
     * Each include item may also contain a comma-separated sublist of items, which will be treated as multiple
     * {@literal <include>} entries.<br>
     * Since 2.19 a complex syntax is supported in one parameter (JUnit 4, JUnit 4.7+, TestNG):
     * <pre><code>
     * {@literal <include>}%regex[.*[Cat|Dog].*], Basic????, !Unstable*{@literal </include>}
     * {@literal <include>}%regex[.*[Cat|Dog].*], !%regex[pkg.*Slow.*.class], pkg{@literal /}**{@literal /}*Fast*.java{@literal </include>}
     * </code></pre>
     * <br>
     * This parameter is ignored if the TestNG {@code suiteXmlFiles} parameter is specified.<br>
     * <br>
     * <b>Notice that</b> these values are relative to the directory containing generated test classes of the project
     * being tested. This directory is declared by the parameter {@code testClassesDirectory} which defaults
     * to the POM property <code>${project.build.testOutputDirectory}</code>, typically
     * <code>{@literal src/test/java}</code> unless overridden.
     */
    @Parameter
    private List<String> includes;

    /**
     * Option to pass dependencies to the system's classloader instead of using an isolated class loader when forking.
     * Prevents problems with JDKs which implement the service provider lookup mechanism by using the system's
     * classloader.
     *
     * @since 2.3
     */
    @Parameter( property = "failsafe.useSystemClassLoader", defaultValue = "true" )
    private boolean useSystemClassLoader;

    /**
     * By default, Surefire forks your tests using a manifest-only JAR; set this parameter to "false" to force it to
     * launch your tests with a plain old Java classpath. (See the
     * <a href="http://maven.apache.org/plugins/maven-failsafe-plugin/examples/class-loading.html">
     * http://maven.apache.org/plugins/maven-failsafe-plugin/examples/class-loading.html</a>
     * for a more detailed explanation of manifest-only JARs and their benefits.)
     * <br>
     * Beware, setting this to "false" may cause your tests to fail on Windows if your classpath is too long.
     *
     * @since 2.4.3
     */
    @Parameter( property = "failsafe.useManifestOnlyJar", defaultValue = "true" )
    private boolean useManifestOnlyJar;

    /**
     * The character encoding scheme to be applied while generating test report
     * files (see target/surefire-reports/yourTestName.txt).
     * The report output files (*-out.txt) are still encoded with JVM's encoding used in standard out/err pipes.
     *
     * @since 3.0.0-M1
     */
    @Parameter( property = "encoding", defaultValue = "${project.reporting.outputEncoding}" )
    private String encoding;

    /**
     * (JUnit 4+ providers)
     * The number of times each failing test will be rerun. If set larger than 0, rerun failing tests immediately after
     * they fail. If a failing test passes in any of those reruns, it will be marked as pass and reported as a "flake".
     * However, all the failing attempts will be recorded.
     */
    @Parameter( property = "failsafe.rerunFailingTestsCount", defaultValue = "0" )
    private int rerunFailingTestsCount;

    /**
     * (TestNG) List of &lt;suiteXmlFile&gt; elements specifying TestNG suite xml file locations. Note that
     * {@code suiteXmlFiles} is incompatible with several other parameters of this plugin, like
     * {@code includes} and {@code excludes}.<br>
     * This parameter is ignored if the {@code test} parameter is specified (allowing you to run a single test
     * instead of an entire suite).
     *
     * @since 2.2
     */
    @Parameter( property = "failsafe.suiteXmlFiles" )
    private File[] suiteXmlFiles;

    /**
     * Defines the order the tests will be run in. Supported values are {@code alphabetical},
     * {@code reversealphabetical}, {@code random}, {@code hourly} (alphabetical on even hours, reverse alphabetical
     * on odd hours), {@code failedfirst}, {@code balanced} and {@code filesystem}.
     * <br>
     * <br>
     * Odd/Even for hourly is determined at the time the of scanning the classpath, meaning it could change during a
     * multi-module build.
     * <br>
     * <br>
     * Failed first will run tests that failed on previous run first, as well as new tests for this run.
     * <br>
     * <br>
     * Balanced is only relevant with parallel=classes, and will try to optimize the run-order of the tests reducing the
     * overall execution time. Initially a statistics file is created and every next test run will reorder classes.
     * <br>
     * <br>
     * Note that the statistics are stored in a file named <b>.surefire-XXXXXXXXX</b> beside <i>pom.xml</i> and
     * should not be checked into version control. The "XXXXX" is the SHA1 checksum of the entire surefire
     * configuration, so different configurations will have different statistics files, meaning if you change any
     * configuration settings you will re-run once before new statistics data can be established.
     *
     * @since 2.7
     */
    @Parameter( property = "failsafe.runOrder", defaultValue = "filesystem" )
    private String runOrder;

    /**
     * A file containing include patterns, each in a next line. Blank lines, or lines starting with # are ignored.
     * If {@code includes} are also specified, these patterns are appended. Example with path, simple and regex
     * includes:
     * <pre><code>
     * *{@literal /}it{@literal /}*
     * **{@literal /}NotIncludedByDefault.java
     * %regex[.*IT.*|.*Not.*]
     * </code></pre>
     */
    @Parameter( property = "failsafe.includesFile" )
    private File includesFile;

    /**
     * A file containing exclude patterns, each in a next line. Blank lines, or lines starting with # are ignored.
     * If {@code excludes} are also specified, these patterns are appended.
     * Example with path, simple and regex excludes:
     * <pre><code>
     * *{@literal /}it{@literal /}*
     * **{@literal /}DontRunIT.*
     * %regex[.*IT.*|.*Not.*]
     * </code></pre>
     */
    @Parameter( property = "failsafe.excludesFile" )
    private File excludesFile;

    /**
     * Set to error/failure count in order to skip remaining tests.
     * Due to race conditions in parallel/forked execution this may not be fully guaranteed.<br>
     * Enable with system property {@code -Dfailsafe.skipAfterFailureCount=1} or any number greater than zero.
     * Defaults to "0".<br>
     * See the prerequisites and limitations in documentation:<br>
     * <a href="http://maven.apache.org/plugins/maven-failsafe-plugin/examples/skip-after-failure.html">
     * http://maven.apache.org/plugins/maven-failsafe-plugin/examples/skip-after-failure.html</a>
     *
     * @since 2.19
     */
    @Parameter( property = "failsafe.skipAfterFailureCount", defaultValue = "0" )
    private int skipAfterFailureCount;

    /**
     * After the plugin process is shutdown by sending <i>SIGTERM signal (CTRL+C)</i>, <i>SHUTDOWN command</i> is
     * received by every forked JVM.
     * <br>
     * By default ({@code shutdown=testset}) forked JVM would not continue with new test which means that
     * the current test may still continue to run.
     * <br>
     * The parameter can be configured with other two values {@code exit} and {@code kill}.
     * <br>
     * Using {@code exit} forked JVM executes {@code System.exit(1)} after the plugin process has received
     * <i>SIGTERM signal</i>.
     * <br>
     * Using {@code kill} the JVM executes {@code Runtime.halt(1)} and kills itself.
     *
     * @since 2.19
     */
    @Parameter( property = "failsafe.shutdown", defaultValue = "testset" )
    private String shutdown;

    @Override
    protected int getRerunFailingTestsCount()
    {
        return rerunFailingTestsCount;
    }

    @Override
    @SuppressWarnings( "unchecked" )
    protected void handleSummary( RunResult summary, Exception firstForkException )
            throws MojoExecutionException, MojoFailureException
    {
        File summaryFile = getSummaryFile();
        if ( !summaryFile.getParentFile().isDirectory() )
        {
            //noinspection ResultOfMethodCallIgnored
            summaryFile.getParentFile().mkdirs();
        }

        try
        {
            Object token = getPluginContext().get( FAILSAFE_IN_PROGRESS_CONTEXT_KEY );
            writeSummary( summary, summaryFile, token != null );
        }
        catch ( Exception e )
        {
            throw new MojoExecutionException( e.getMessage(), e );
        }

        getPluginContext().put( FAILSAFE_IN_PROGRESS_CONTEXT_KEY, FAILSAFE_IN_PROGRESS_CONTEXT_KEY );
    }

    private boolean isJarArtifact( File artifactFile )
    {
        return artifactFile != null && artifactFile.isFile() && artifactFile.getName().toLowerCase().endsWith( ".jar" );
    }

    private static File toAbsoluteCanonical( File f )
    {
        try
        {
            return f == null ? null : f.getAbsoluteFile().getCanonicalFile();
        }
        catch ( IOException e )
        {
            throw new IllegalStateException( e.getLocalizedMessage(), e );
        }
    }

    @Override
    @SuppressWarnings( "deprecation" )
    protected boolean isSkipExecution()
    {
        return isSkip() || isSkipTests() || isSkipITs() || isSkipExec();
    }

    @Override
    protected String getPluginName()
    {
        return "failsafe";
    }

    @Override
    protected String[] getDefaultIncludes()
    {
        return new String[]{ "**/IT*.java", "**/*IT.java", "**/*ITCase.java" };
    }

    @Override
    protected String getReportSchemaLocation()
    {
        return "https://maven.apache.org/surefire/maven-failsafe-plugin/xsd/failsafe-test-report.xsd";
    }

    @Override
    public boolean isSkipTests()
    {
        return skipTests;
    }

    @Override
    public void setSkipTests( boolean skipTests )
    {
        this.skipTests = skipTests;
    }

    public boolean isSkipITs()
    {
        return skipITs;
    }

    public void setSkipITs( boolean skipITs )
    {
        this.skipITs = skipITs;
    }

    @Override
    @SuppressWarnings( "deprecation" )
    @Deprecated
    public boolean isSkipExec()
    {
        return skipExec;
    }

    @Override
    @SuppressWarnings( "deprecation" )
    @Deprecated
    public void setSkipExec( boolean skipExec )
    {
        this.skipExec = skipExec;
    }

    @Override
    public boolean isSkip()
    {
        return skip;
    }

    @Override
    public void setSkip( boolean skip )
    {
        this.skip = skip;
    }

    @Override
    public File getBasedir()
    {
        return basedir;
    }

    @Override
    public void setBasedir( File basedir )
    {
        this.basedir = basedir;
    }

    @Override
    public File getTestClassesDirectory()
    {
        return testClassesDirectory;
    }

    @Override
    public void setTestClassesDirectory( File testClassesDirectory )
    {
        this.testClassesDirectory = testClassesDirectory;
    }

    /**
     * @return Output directory, or artifact file if artifact type is "jar". If not forking the JVM, parameter
     * {@link #useSystemClassLoader} is ignored and the {@link org.apache.maven.surefire.booter.IsolatedClassLoader} is
     * used instead. See the resolution of {@link #getClassLoaderConfiguration() ClassLoaderConfiguration}.
     */
    @Override
    public File getClassesDirectory()
    {
        File artifact = getProject().getArtifact().getFile();
        boolean isDefaultClsDir = classesDirectory == null;
        return isDefaultClsDir ? ( isJarArtifact( artifact ) ? artifact : defaultClassesDirectory ) : classesDirectory;
    }

    @Override
    public void setClassesDirectory( File classesDirectory )
    {
        this.classesDirectory = toAbsoluteCanonical( classesDirectory );
    }

    public void setDefaultClassesDirectory( File defaultClassesDirectory )
    {
        this.defaultClassesDirectory = toAbsoluteCanonical( defaultClassesDirectory );
    }

    @Override
    public File getReportsDirectory()
    {
        return reportsDirectory;
    }

    @Override
    public void setReportsDirectory( File reportsDirectory )
    {
        this.reportsDirectory = reportsDirectory;
    }

    @Override
    public String getTest()
    {
        return test;
    }

    @Override
    public void setTest( String test )
    {
        this.test = test;
    }

    public File getSummaryFile()
    {
        return summaryFile;
    }

    public void setSummaryFile( File summaryFile )
    {
        this.summaryFile = summaryFile;
    }

    @Override
    public boolean isPrintSummary()
    {
        return printSummary;
    }

    @Override
    public void setPrintSummary( boolean printSummary )
    {
        this.printSummary = printSummary;
    }

    @Override
    public String getReportFormat()
    {
        return reportFormat;
    }

    @Override
    public void setReportFormat( String reportFormat )
    {
        this.reportFormat = reportFormat;
    }

    @Override
    public boolean isUseFile()
    {
        return useFile;
    }

    @Override
    public void setUseFile( boolean useFile )
    {
        this.useFile = useFile;
    }

    @Override
    public String getDebugForkedProcess()
    {
        return debugForkedProcess;
    }

    @Override
    public void setDebugForkedProcess( String debugForkedProcess )
    {
        this.debugForkedProcess = debugForkedProcess;
    }

    @Override
    public int getForkedProcessTimeoutInSeconds()
    {
        return forkedProcessTimeoutInSeconds;
    }

    @Override
    public void setForkedProcessTimeoutInSeconds( int forkedProcessTimeoutInSeconds )
    {
        this.forkedProcessTimeoutInSeconds = forkedProcessTimeoutInSeconds;
    }

    @Override
    public int getForkedProcessExitTimeoutInSeconds()
    {
        return forkedProcessExitTimeoutInSeconds;
    }

    @Override
    public void setForkedProcessExitTimeoutInSeconds( int forkedProcessExitTimeoutInSeconds )
    {
        this.forkedProcessExitTimeoutInSeconds = forkedProcessExitTimeoutInSeconds;
    }

    @Override
    public double getParallelTestsTimeoutInSeconds()
    {
        return parallelTestsTimeoutInSeconds;
    }

    @Override
    public void setParallelTestsTimeoutInSeconds( double parallelTestsTimeoutInSeconds )
    {
        this.parallelTestsTimeoutInSeconds = parallelTestsTimeoutInSeconds;
    }

    @Override
    public double getParallelTestsTimeoutForcedInSeconds()
    {
        return parallelTestsTimeoutForcedInSeconds;
    }

    @Override
    public void setParallelTestsTimeoutForcedInSeconds( double parallelTestsTimeoutForcedInSeconds )
    {
        this.parallelTestsTimeoutForcedInSeconds = parallelTestsTimeoutForcedInSeconds;
    }

    @Override
    public boolean isUseSystemClassLoader()
    {
        return useSystemClassLoader;
    }

    @Override
    public void setUseSystemClassLoader( boolean useSystemClassLoader )
    {
        this.useSystemClassLoader = useSystemClassLoader;
    }

    @Override
    public boolean isUseManifestOnlyJar()
    {
        return useManifestOnlyJar;
    }

    @Override
    public void setUseManifestOnlyJar( boolean useManifestOnlyJar )
    {
        this.useManifestOnlyJar = useManifestOnlyJar;
    }

    @Override
    public String getEncoding()
    {
        return encoding;
    }

    @Override
    public void setEncoding( String encoding )
    {
        this.encoding = encoding;
    }

    // the following will be refactored out once the common code is all in one place

    public boolean isTestFailureIgnore()
    {
        return true; // ignore
    }

    public void setTestFailureIgnore( boolean testFailureIgnore )
    {
        // ignore
    }

    @Override
    protected void addPluginSpecificChecksumItems( ChecksumCalculator checksum )
    {
        checksum.add( skipITs );
        checksum.add( summaryFile );
    }

    @Override
    public Boolean getFailIfNoSpecifiedTests()
    {
        return failIfNoSpecifiedTests;
    }

    @Override
    public void setFailIfNoSpecifiedTests( boolean failIfNoSpecifiedTests )
    {
        this.failIfNoSpecifiedTests = failIfNoSpecifiedTests;
    }

    @Override
    public int getSkipAfterFailureCount()
    {
        return skipAfterFailureCount;
    }

    @Override
    public String getShutdown()
    {
        return shutdown;
    }

    @Override
    public List<String> getIncludes()
    {
        return includes;
    }

    @Override
    public void setIncludes( List<String> includes )
    {
        this.includes = includes;
    }

    @Override
    public File[] getSuiteXmlFiles()
    {
        return suiteXmlFiles.clone();
    }

    @Override
    @SuppressWarnings( "UnusedDeclaration" )
    public void setSuiteXmlFiles( File[] suiteXmlFiles )
    {
        this.suiteXmlFiles = suiteXmlFiles.clone();
    }

    @Override
    public String getRunOrder()
    {
        return runOrder;
    }

    @Override
    @SuppressWarnings( "UnusedDeclaration" )
    public void setRunOrder( String runOrder )
    {
        this.runOrder = runOrder;
    }

    @Override
    public File getIncludesFile()
    {
        return includesFile;
    }

    @Override
    public File getExcludesFile()
    {
        return excludesFile;
    }

    @Override
    protected final List<File> suiteXmlFiles()
    {
        return hasSuiteXmlFiles() ? Arrays.asList( suiteXmlFiles ) : Collections.<File>emptyList();
    }

    @Override
    protected final boolean hasSuiteXmlFiles()
    {
        return suiteXmlFiles != null && suiteXmlFiles.length != 0;
    }

    static Charset toCharset( String encoding )
    {
        return Charset.forName( Charset.isSupported( encoding ) ? encoding : encoding.toUpperCase( Locale.ROOT ) );
    }
}
