Method NewWritableFile

src/leveldb/util/testutil.h:42–50

  ~ErrorEnv() override { delete target(); }

  Status NewWritableFile(const std::string& fname,
                         WritableFile** result) override {
    if (writable_file_error_) {
      ++num_writable_file_errors_;
      *result = nullptr;
      return Status::IOError(fname, "fake error");
    }
    return target()->NewWritableFile(fname, result);
  }

  Status NewAppendableFile(const std::string& fname,
                           WritableFile** result) override {