@After
    public void teardown() throws Exception {
        this.fileManager.shutdown();
        this.allocateService.shutdown(true);
        super.teardown();
    }
Use indexFile to test fileManager
@author hzh (642256541@qq.com)
jraft-extension/java-log-storage-impl/src/test/java/com/alipay/sofa/jraft/storage/file/FileManagerTest.java