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