Method CountOpenFds

be/src/kudu/util/file_cache-test.cc:78–83

  }

  int CountOpenFds() const {
    // Only count files in the test working directory so that we don't
    // accidentally count other fds that might be opened or closed in
    // the background by other threads.
    return kudu::CountOpenFds(env_, GetTestPath("*"));
  }

  void SetUp() override {
    KuduTest::SetUp();