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| 1 // Copyright (c) 2010 The Chromium OS 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. |
| 4 |
| 5 #include <sys/stat.h> |
| 6 #include <sys/types.h> |
| 7 #include <unistd.h> |
| 8 #include <set> |
| 9 #include <string> |
| 10 #include <vector> |
| 11 #include <gtest/gtest.h> |
| 12 #include "base/basictypes.h" |
| 13 #include "update_engine/extent_mapper.h" |
| 14 #include "update_engine/utils.h" |
| 15 |
| 16 using std::set; |
| 17 using std::string; |
| 18 using std::vector; |
| 19 |
| 20 namespace chromeos_update_engine { |
| 21 |
| 22 class ExtentMapperTest : public ::testing::Test {}; |
| 23 |
| 24 TEST(ExtentMapperTest, RunAsRootSimpleTest) { |
| 25 // It's hard to have a concrete test for extent mapping without including |
| 26 // a specific filesystem image. |
| 27 // In lieu of this, we do a weak test: make sure the extents of the unittest |
| 28 // executable are consistent and they match with the size of the file. |
| 29 const string kFilename = "/proc/self/exe"; |
| 30 const off_t kBlockSize = 4096; |
| 31 |
| 32 vector<Extent> extents; |
| 33 |
| 34 ASSERT_TRUE(ExtentsForFileFibmap(kFilename, &extents)); |
| 35 |
| 36 EXPECT_FALSE(extents.empty()); |
| 37 set<uint64> blocks; |
| 38 |
| 39 for (vector<Extent>::const_iterator it = extents.begin(); |
| 40 it != extents.end(); ++it) { |
| 41 for (uint64 block = it->start_block(); |
| 42 block < it->start_block() + it->num_blocks(); |
| 43 block++) { |
| 44 EXPECT_FALSE(utils::SetContainsKey(blocks, block)); |
| 45 blocks.insert(block); |
| 46 } |
| 47 } |
| 48 |
| 49 struct stat stbuf; |
| 50 EXPECT_EQ(0, stat(kFilename.c_str(), &stbuf)); |
| 51 EXPECT_EQ(blocks.size(), (stbuf.st_size + kBlockSize - 1)/kBlockSize); |
| 52 } |
| 53 |
| 54 } // namespace chromeos_update_engine |
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