if (installationToolchainsFile != null && installationToolchainsFile.isFile()) {
            toolchainsRequest.setGlobalToolchainsSource(new FileSource(installationToolchainsFile));
        }
        if (userToolchainsFile != null && userToolchainsFile.isFile()) {
            toolchainsRequest.setUserToolchainsSource(new FileSource(userToolchainsFile));
        }

        }
    }

    private
    fun assertLeftoverFilesCleanedUpEventually(vararg leftoverFiles: String) {
        leftoverFiles.forEach {
            assertTrue(projectDir.resolve(it).walk().filter { it.isFile }.toList().isEmpty())
        }
    }

    @Test
    fun `fail build if leftover file found and test passes`() {
        val result = run(":successful-test-with-leftover:test", "--no-watch-fs").buildAndFail()

                responseData.setHttpStatusCode(Constants.NOT_FOUND_STATUS_CODE);
                responseData.setCharSet(charset);
                responseData.setContentLength(0);
            } else if (file.isFile()) {
                // check file size
                responseData.setContentLength(file.length());
                checkMaxContentLength(responseData);

                parseFileOwnerAttribute(responseData, file);

                    cmdList.add(expandPath(value.replace("${url}", tempPath).replace("${outputFile}", outputPath)));
                }

                executeCommand(thumbnailId, cmdList);

                if (outputFile.isFile() && outputFile.length() == 0) {
                    logger.warn("Thumbnail File is empty. ID is {}", thumbnailId);
                    if (outputFile.delete()) {

                    logger.debug("generator path: {}", s);
                }
                return s;
            }).allMatch(s -> {
                final boolean found = new File(s).isFile();
                if (found && logger.isDebugEnabled()) {
                    logger.debug("{} is found.", s);
                }
                return found;
            });
        } else {

                responseData.setHttpStatusCode(Constants.NOT_FOUND_STATUS_CODE);
                responseData.setCharSet(charset);
                responseData.setContentLength(0);
            } else if (file.isFile()) {
                if (logger.isDebugEnabled()) {
                    logger.debug("Checking SmbFile Size: {}", filePath);
                }
                responseData.setContentLength(file.length());

        if (pluginFile == null) {
            throw new IllegalStateException("plugin main artifact has not been resolved for " + getId());
        }

        if (pluginFile.isFile()) {
            try {
                return new URL("jar:" + pluginFile.toURI() + "!/" + descriptor).openStream();
            } catch (MalformedURLException e) {
                throw new IllegalStateException(e);

                responseData.setHttpStatusCode(Constants.NOT_FOUND_STATUS_CODE);
                responseData.setCharSet(charset);
                responseData.setContentLength(0);
            } else if (file.isFile()) {
                if (logger.isDebugEnabled()) {
                    logger.debug("Checking SmbFile Size: {}", filePath);
                }
                responseData.setContentLength(file.length());

                throw new ArtifactNotFoundException(
                        "System artifact: " + artifact + " not found in path: " + systemFile, artifact);
            }

            if (!systemFile.isFile()) {
                throw new ArtifactNotFoundException(
                        "System artifact: " + artifact + " is not a file: " + systemFile, artifact);
            }

            artifact.setResolved(true);

		// Upon error just return Go-syntax representation of the value
		return fmt.Sprintf("%#v", req)
	}

	// Formatted string.
	return strings.TrimSpace(buffer.String())
}

// isFile - returns whether given path is a file or not.
func isFile(path string) bool {
	if fi, err := os.Stat(path); err == nil {
		return fi.Mode().IsRegular()
	}

	return false
}

// UTCNow - returns current UTC time.