// Register mock system helper
            SystemHelper mockSystemHelper = new SystemHelper() {
                @Override
                public File createTempFile(String prefix, String suffix) {
                    try {
                        return File.createTempFile(prefix, suffix);
                    } catch (Exception e) {
                        throw new RuntimeException(e);
                    }
                }

        server.start();

        final String url = "http://localhost:7070/";
        try {
            final int maxCount = 50;
            final int numOfThread = 10;

            final File file = File.createTempFile("crawler-", "");
            file.delete();
            file.mkdirs();
            file.deleteOnExit();
            fileTransformer.setPath(file.getAbsolutePath());
            crawler.addUrl(url);

    public TestSystemProperties() {
        // Create a temporary file to satisfy DynamicProperties constructor
        super(createTempFile());
        loadTestProperties();
    }

    private static File createTempFile() {
        try {
            File tempFile = File.createTempFile("test-system", ".properties");
            tempFile.deleteOnExit();
            return tempFile;
        } catch (IOException e) {

        ContentCache cache = new ContentCache(data);

        assertNotNull(cache);
    }

    @Test
    public void testFileBasedCacheConstructor() throws IOException {
        tempFile = File.createTempFile("test", ".tmp", Curl.tmpDir);
        ContentCache cache = new ContentCache(tempFile);

        assertNotNull(cache);
    }

    @Test
    public void testMemoryBasedCacheGetInputStream() throws IOException {

        server.start();

        final String url = "http://localhost:7070/";
        try {
            final int maxCount = 50;
            final int numOfThread = 10;

            final File file = File.createTempFile("crawler-", "");
            file.delete();
            file.mkdirs();
            file.deleteOnExit();
            fileTransformer.setPath(file.getAbsolutePath());
            crawler.addUrl(url);

        assertTrue(true);
    }

    // Basic generate tests that work without component dependencies
    public void test_generate_outputFile_exists() throws Exception {
        final File outputFile = File.createTempFile("command_generator", ".out");
        try {
            assertTrue(outputFile.exists());
            generator.setCommandList(Collections.singletonList("invalid_command_for_test"));

        server.start();

        final String url = "http://localhost:7070/";
        try {
            final int maxCount = 50;
            final int numOfThread = 10;

            final File file = File.createTempFile("crawler-", "");
            file.delete();
            file.mkdirs();
            file.deleteOnExit();
            fileTransformer.setPath(file.getAbsolutePath());
            crawler.addUrl(url);

            public String getHostname() {
                return "test-host";
            }

            @Override
            public File createTempFile(String prefix, String suffix) {
                try {
                    return File.createTempFile(prefix, suffix);
                } catch (Exception e) {
                    throw new RuntimeException(e);
                }
            }
        };

                super.parseProjectProperties(propFile.toPath());
            }

            @Override
            public File createTempFile(String prefix, String suffix) {
                try {
                    File tempFile = File.createTempFile(prefix, suffix);
                    tempFile.deleteOnExit();
                    return tempFile;
                } catch (IOException e) {

     * @return The created temporary file.
     */
    protected File createTempFile(final String prefix, final String suffix, final File directory) {
        try {
            final File tempFile = File.createTempFile(prefix, suffix, directory);
            tempFile.setReadable(false, false);
            tempFile.setReadable(true, true);