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64 lines
1.9 KiB
64 lines
1.9 KiB
// Copyright (c) 2018 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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#include "leveldb/env.h"
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#include "port/port.h"
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#include "util/env_windows_test_helper.h"
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#include "util/testharness.h"
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namespace leveldb {
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static const int kMMapLimit = 4;
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class EnvWindowsTest {
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public:
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static void SetFileLimits(int mmap_limit) {
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EnvWindowsTestHelper::SetReadOnlyMMapLimit(mmap_limit);
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}
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EnvWindowsTest() : env_(Env::Default()) {}
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Env* env_;
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};
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TEST(EnvWindowsTest, TestOpenOnRead) {
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// Write some test data to a single file that will be opened |n| times.
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std::string test_dir;
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ASSERT_OK(env_->GetTestDirectory(&test_dir));
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std::string test_file = test_dir + "/open_on_read.txt";
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FILE* f = fopen(test_file.c_str(), "w");
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ASSERT_TRUE(f != nullptr);
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const char kFileData[] = "abcdefghijklmnopqrstuvwxyz";
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fputs(kFileData, f);
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fclose(f);
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// Open test file some number above the sum of the two limits to force
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// leveldb::WindowsEnv to switch from mapping the file into memory
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// to basic file reading.
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const int kNumFiles = kMMapLimit + 5;
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leveldb::RandomAccessFile* files[kNumFiles] = {0};
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for (int i = 0; i < kNumFiles; i++) {
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ASSERT_OK(env_->NewRandomAccessFile(test_file, &files[i]));
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}
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char scratch;
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Slice read_result;
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for (int i = 0; i < kNumFiles; i++) {
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ASSERT_OK(files[i]->Read(i, 1, &read_result, &scratch));
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ASSERT_EQ(kFileData[i], read_result[0]);
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}
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for (int i = 0; i < kNumFiles; i++) {
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delete files[i];
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}
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ASSERT_OK(env_->DeleteFile(test_file));
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}
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} // namespace leveldb
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int main(int argc, char** argv) {
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// All tests currently run with the same read-only file limits.
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leveldb::EnvWindowsTest::SetFileLimits(leveldb::kMMapLimit);
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return leveldb::test::RunAllTests();
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}
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