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* pages,
  34    :                      size_t page_size)
  35    :        : MsfFileStream(file, length, pages, page_size) {}
  36    :  
  37  E :    virtual ~TestMsfFileStream() {}
  38    :  
  39    :    using MsfFileStream::ReadBytes;
  40    :    using MsfFileStream::ReadFromPage;
  41    :  };
  42    :  
  43    :  class MsfFileStreamTest : public testing::Test {
  44    :   public:
  45  E :    virtual void SetUp() {
  46    :      file_ = new RefCountedFILE(base::OpenFile(
  47  E :          testing::GetSrcRelativePath(testing::kTestPdbFilePath), "rb"));
  48  E :      ASSERT_TRUE(file_.get() != NULL);
  49  E :    }
  50    :  
  51    :   protected:
  52    :    scoped_refptr<RefCountedFILE> file_;
  53    :  };
  54    :  
  55    :  }  // namespace
  56    :  
  57  E :  TEST_F(MsfFileStreamTest, Constructor) {
  58  E :    size_t pages[] = {1, 2, 3};
  59    :    scoped_refptr<MsfFileStream> stream(
  60  E :        new MsfFileStream(file_.get(), 10, pages, 8));
  61  E :    EXPECT_EQ(10, stream->length());
  62  E :  }
  63    :  
  64  E :  TEST_F(MsfFileStreamTest, ReadFromPage) {
  65    :    struct TestCase {
  66    :      uint32 page_num;
  67    :      size_t offset;
  68    :      size_t count;
  69    :      char* expected;
  70    :    };
  71    :  
  72    :    // Test calling ReadFromPage with different combinations of page number,
  73    :    // offset and count.
  74    :    TestCase test_cases[] = {{0, 0, 3, "Mic"},
  75    :                             {0, 0, 4, "Micr"},
  76    :                             {0, 1, 2, "ic"},
  77    :                             {0, 2, 2, "cr"},
  78    :                             {1, 0, 2, "os"},
  79    :                             {1, 1, 3, "sof"},
  80    :                             {2, 0, 4, "t C/"},
  81  E :                             {2, 2, 2, "C/"}};
  82    :  
  83  E :    size_t pages[] = {0, 1, 2};
  84  E :    size_t page_size = 4;
  85    :    scoped_refptr<TestMsfFileStream> stream(
  86  E :        new TestMsfFileStream(file_.get(), sizeof(MsfHeader), pages, page_size));
  87    :  
  88  E :    char buffer[4] = {0};
  89  E :    for (uint32 i = 0; i < arraysize(test_cases); ++i) {
  90  E :      TestCase test_case = test_cases[i];
  91    :      EXPECT_TRUE(stream->ReadFromPage(&buffer, test_case.page_num,
  92  E :                                       test_case.offset, test_case.count));
  93    :      EXPECT_EQ(0,
  94  E :                memcmp(buffer, test_case.expected, strlen(test_case.expected)));
  95  E :    }
  96  E :  }
  97    :  
  98  E :  TEST_F(MsfFileStreamTest, ReadBytes) {
  99    :    // Different sections of the MSF header magic string.
 100  E :    char* test_cases[] = {"Mic", "roso", "ft", " C/C+", "+ MS", "F 7.00"};
 101    :  
 102    :    // Test that we can read varying sizes of bytes from the header of the
 103    :    // file with varying page sizes.
 104  E :    char buffer[8] = {0};
 105  E :    for (size_t page_size = 4; page_size <= 32; page_size *= 2) {
 106  E :      size_t pages[] = {0, 1, 2, 3, 4, 5, 6, 7};
 107    :      scoped_refptr<TestMsfFileStream> stream(new TestMsfFileStream(
 108  E :          file_.get(), sizeof(MsfHeader), pages, page_size));
 109    :  
 110  E :      for (uint32 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 :        size_t bytes_read = 0;
 114  E :        EXPECT_TRUE(stream->ReadBytes(&buffer, len, &bytes_read));
 115  E :        EXPECT_EQ(0, memcmp(buffer, test_case, len));
 116  E :        EXPECT_EQ(len, bytes_read);
 117  E :      }
 118  E :    }
 119  E :  }
 120    :  
 121    :  }  // namespace msf