1    :  // Copyright 2012 Google Inc. All Rights Reserved.
   2    :  //
   3    :  // Licensed under the Apache License, Version 2.0 (the "License");
   4    :  // you may not use this file except in compliance with the License.
   5    :  // You may obtain a copy of the License at
   6    :  //
   7    :  //     http://www.apache.org/licenses/LICENSE-2.0
   8    :  //
   9    :  // Unless required by applicable law or agreed to in writing, software
  10    :  // distributed under the License is distributed on an "AS IS" BASIS,
  11    :  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12    :  // See the License for the specific language governing permissions and
  13    :  // limitations under the License.
  14    :  
  15    :  #include "syzygy/msf/msf_file_stream.h"
  16    :  
  17    :  #include "base/path_service.h"
  18    :  #include "base/files/file_util.h"
  19    :  #include "gtest/gtest.h"
  20    :  #include "syzygy/core/unittest_util.h"
  21    :  #include "syzygy/msf/msf_constants.h"
  22    :  #include "syzygy/msf/msf_data.h"
  23    :  #include "syzygy/msf/unittest_util.h"
  24    :  
  25    :  namespace msf {
  26    :  
  27    :  namespace {
  28    :  
  29    :  class TestMsfFileStream : public MsfFileStream {
  30    :   public:
  31  E :    TestMsfFileStream(RefCountedFILE* file,
  32    :                      size_t length,
  33    :                      const uint32_t* pages,
  34    :                      size_t page_size)
  35  E :        : MsfFileStream(file, length, pages, page_size) {}
  36    :  
  37  E :    virtual ~TestMsfFileStream() {}
  38    :  
  39    :    using MsfFileStream::ReadFromPage;
  40    :  };
  41    :  
  42    :  class MsfFileStreamTest : public testing::Test {
  43    :   public:
  44  E :    virtual void SetUp() {
  45  E :      file_ = new RefCountedFILE(base::OpenFile(
  46    :          testing::GetSrcRelativePath(testing::kTestPdbFilePath), "rb"));
  47  E :      ASSERT_TRUE(file_.get() != NULL);
  48  E :    }
  49    :  
  50    :   protected:
  51    :    scoped_refptr<RefCountedFILE> file_;
  52    :  };
  53    :  
  54    :  }  // namespace
  55    :  
  56  E :  TEST_F(MsfFileStreamTest, Constructor) {
  57  E :    size_t pages[] = {1, 2, 3};
  58  E :    scoped_refptr<MsfFileStream> stream(
  59    :        new MsfFileStream(file_.get(), 10, pages, 8));
  60  E :    EXPECT_EQ(10, stream->length());
  61  E :  }
  62    :  
  63  E :  TEST_F(MsfFileStreamTest, ReadFromPage) {
  64    :    struct TestCase {
  65    :      uint32_t page_num;
  66    :      size_t offset;
  67    :      size_t count;
  68    :      char* expected;
  69    :    };
  70    :  
  71    :    // Test calling ReadFromPage with different combinations of page number,
  72    :    // offset and count.
  73  E :    TestCase test_cases[] = {{0, 0, 3, "Mic"},
  74  E :                             {0, 0, 4, "Micr"},
  75  E :                             {0, 1, 2, "ic"},
  76  E :                             {0, 2, 2, "cr"},
  77  E :                             {1, 0, 2, "os"},
  78  E :                             {1, 1, 3, "sof"},
  79  E :                             {2, 0, 4, "t C/"},
  80  E :                             {2, 2, 2, "C/"}};
  81    :  
  82  E :    size_t pages[] = {0, 1, 2};
  83  E :    size_t page_size = 4;
  84  E :    scoped_refptr<TestMsfFileStream> stream(
  85    :        new TestMsfFileStream(file_.get(), sizeof(MsfHeader), pages, page_size));
  86    :  
  87  E :    char buffer[4] = {0};
  88  E :    for (uint32_t i = 0; i < arraysize(test_cases); ++i) {
  89  E :      TestCase test_case = test_cases[i];
  90  E :      EXPECT_TRUE(stream->ReadFromPage(&buffer, test_case.page_num,
  91  E :                                       test_case.offset, test_case.count));
  92  E :      EXPECT_EQ(0,
  93  E :                ::memcmp(buffer, test_case.expected, strlen(test_case.expected)));
  94  E :    }
  95  E :  }
  96    :  
  97  E :  TEST_F(MsfFileStreamTest, ReadBytesAt) {
  98    :    // Different sections of the MSF header magic string.
  99  E :    char* test_cases[] = {"Mic", "roso", "ft", " C/C+", "+ MS", "F 7.00"};
 100    :  
 101    :    // Test that we can read varying sizes of bytes from the header of the
 102    :    // file with varying page sizes.
 103  E :    char buffer[8] = {0};
 104  E :    for (size_t page_size = 4; page_size <= 32; page_size *= 2) {
 105  E :      size_t pages[] = {0, 1, 2, 3, 4, 5, 6, 7};
 106  E :      scoped_refptr<TestMsfFileStream> stream(new TestMsfFileStream(
 107    :          file_.get(), sizeof(MsfHeader), pages, page_size));
 108    :  
 109  E :      size_t pos = 0;
 110  E :      for (uint32_t j = 0; j < arraysize(test_cases); ++j) {
 111  E :        char* test_case = test_cases[j];
 112  E :        size_t len = strlen(test_case);
 113  E :        EXPECT_TRUE(stream->ReadBytesAt(pos, len, &buffer));
 114  E :        EXPECT_EQ(0U, ::memcmp(buffer, test_case, len));
 115  E :        pos += len;
 116  E :      }
 117    :  
 118    :      // Try a read past the end of the file.
 119  E :      EXPECT_FALSE(stream->ReadBytesAt(sizeof(MsfHeader) - 1, 2, buffer));
 120  E :    }
 121  E :  }
 122    :  
 123    :  }  // namespace msf