| // Copyright (c) 2011 The LevelDB Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. See the AUTHORS file for names of contributors. |
| |
| #ifndef STORAGE_LEVELDB_UTIL_TESTUTIL_H_ |
| #define STORAGE_LEVELDB_UTIL_TESTUTIL_H_ |
| |
| #include "include/env.h" |
| #include "include/slice.h" |
| #include "util/random.h" |
| |
| namespace leveldb { |
| namespace test { |
| |
| // Store in *dst a random string of length "len" and return a Slice that |
| // references the generated data. |
| extern Slice RandomString(Random* rnd, int len, std::string* dst); |
| |
| // Return a random key with the specified length that may contain interesting |
| // characters (e.g. \x00, \xff, etc.). |
| extern std::string RandomKey(Random* rnd, int len); |
| |
| // Store in *dst a string of length "len" that will compress to |
| // "N*compressed_fraction" bytes and return a Slice that references |
| // the generated data. |
| extern Slice CompressibleString(Random* rnd, double compressed_fraction, |
| int len, std::string* dst); |
| |
| // A wrapper that allows injection of errors. |
| class ErrorEnv : public EnvWrapper { |
| public: |
| bool writable_file_error_; |
| int num_writable_file_errors_; |
| |
| ErrorEnv() : EnvWrapper(Env::Default()), |
| writable_file_error_(false), |
| num_writable_file_errors_(0) { } |
| |
| virtual Status NewWritableFile(const std::string& fname, |
| WritableFile** result) { |
| if (writable_file_error_) { |
| ++num_writable_file_errors_; |
| *result = NULL; |
| return Status::IOError(fname, "fake error"); |
| } |
| return target()->NewWritableFile(fname, result); |
| } |
| }; |
| |
| } |
| } |
| |
| #endif // STORAGE_LEVELDB_UTIL_TESTUTIL_H_ |