public File getReportDataFile(long testId, String key) {
		File reportFolder = config.getHome().getPerfTestReportDirectory(String.valueOf(testId));
		return new File(reportFolder, key + ".data");
	}
Get a single file for the given report key.

@param testId test id
@param key    key
@return return file
ngrinder-controller/src/main/java/org/ngrinder/perftest/service/PerfTestService.java