jorlow@chromium.org | 179be58 | 2011-03-18 22:37:00 +0000 | [diff] [blame] | 1 | // Copyright (c) 2011 The LevelDB Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. See the AUTHORS file for names of contributors. |
| 4 | |
| 5 | #ifndef STORAGE_LEVELDB_UTIL_TESTUTIL_H_ |
| 6 | #define STORAGE_LEVELDB_UTIL_TESTUTIL_H_ |
| 7 | |
| 8 | #include "include/env.h" |
| 9 | #include "include/slice.h" |
| 10 | #include "util/random.h" |
| 11 | |
| 12 | namespace leveldb { |
| 13 | namespace test { |
| 14 | |
| 15 | // Store in *dst a random string of length "len" and return a Slice that |
| 16 | // references the generated data. |
| 17 | extern Slice RandomString(Random* rnd, int len, std::string* dst); |
| 18 | |
| 19 | // Return a random key with the specified length that may contain interesting |
| 20 | // characters (e.g. \x00, \xff, etc.). |
| 21 | extern std::string RandomKey(Random* rnd, int len); |
| 22 | |
| 23 | // Store in *dst a string of length "len" that will compress to |
| 24 | // "N*compressed_fraction" bytes and return a Slice that references |
| 25 | // the generated data. |
| 26 | extern Slice CompressibleString(Random* rnd, double compressed_fraction, |
| 27 | int len, std::string* dst); |
| 28 | |
| 29 | // A wrapper that allows injection of errors. |
| 30 | class ErrorEnv : public EnvWrapper { |
| 31 | public: |
| 32 | bool writable_file_error_; |
| 33 | int num_writable_file_errors_; |
| 34 | |
| 35 | ErrorEnv() : EnvWrapper(Env::Default()), |
| 36 | writable_file_error_(false), |
| 37 | num_writable_file_errors_(0) { } |
| 38 | |
| 39 | virtual Status NewWritableFile(const std::string& fname, |
| 40 | WritableFile** result) { |
| 41 | if (writable_file_error_) { |
| 42 | ++num_writable_file_errors_; |
| 43 | *result = NULL; |
| 44 | return Status::IOError(fname, "fake error"); |
| 45 | } |
| 46 | return target()->NewWritableFile(fname, result); |
| 47 | } |
| 48 | }; |
| 49 | |
| 50 | } |
| 51 | } |
| 52 | |
| 53 | #endif // STORAGE_LEVELDB_UTIL_TESTUTIL_H_ |