public static File createTestDir(Class<?> clazz) throws IOException {
		String systemTmpDir = System.getProperty("java.io.tmpdir");
		long simpleRandomLong = (long) (Long.MAX_VALUE * Math.random());
		File testTempDir = new File(systemTmpDir, "flamingo-" + clazz.getClass().getSimpleName() + '-' + simpleRandomLong);
		if (!testTempDir.mkdir()) {
			throw new IOException("임시 디렉토리를 생성할 수 없습니다: " + testTempDir);
		}
		testTempDir.deleteOnExit();
		return testTempDir;
	}