Make VEA test support videos with different coded size and visible size

base/files/memory_mapped_file_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/files/memory_mapped_file.h"
 
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
@@ skipping 143 matching lines @@
   MemoryMappedFile map;
 
   File file(temp_file_path(), File::FLAG_OPEN | File::FLAG_READ);
   map.Initialize(file.Pass(), MemoryMappedFile::Region(kOffset, kPartialSize));
   ASSERT_EQ(kPartialSize, map.length());
   ASSERT_TRUE(map.data() != NULL);
   EXPECT_TRUE(map.IsValid());
   ASSERT_TRUE(CheckBufferContents(map.data(), kPartialSize, kOffset));
 }
 
+TEST_F(MemoryMappedFileTest, MapWholeFileWithWrite) {
+  const size_t kFileSize = 68 * 1024;
+  CreateTemporaryTestFile(kFileSize);
+  MemoryMappedFile map;
+  map.Initialize(File(temp_file_path(), File::FLAG_OPEN |
+                                        File::FLAG_READ |
+                                        File::FLAG_WRITE), true);
+  ASSERT_EQ(kFileSize, map.length());
+  ASSERT_TRUE(map.data() != NULL);
+  EXPECT_TRUE(map.IsValid());
+  ASSERT_TRUE(CheckBufferContents(map.data(), kFileSize, 0));
+
+  const char* test_string = "TEST_STRING";

[wuchengli, 2014/09/01 06:57:15]

Can we use CreateTestBuffer with a non-0 offset?

[henryhsu, 2014/09/01 07:49:49]

Done.

+  memcpy(map.data(), test_string, strlen(test_string));
+  map.CloseHandles();
+
+  MemoryMappedFile read_map;
+  read_map.Initialize(File(temp_file_path(), File::FLAG_OPEN |
+                                             File::FLAG_READ));
+  ASSERT_EQ(kFileSize, read_map.length());
+  ASSERT_TRUE(read_map.data() != NULL);
+  EXPECT_TRUE(read_map.IsValid());
+  ASSERT_TRUE(memcmp(read_map.data(), test_string, strlen(test_string)) == 0);

[wuchengli, 2014/09/01 06:57:15]

Use CheckBufferContents with a non-0 offset?

[henryhsu, 2014/09/01 07:49:49]

Done.

+}
+
+TEST_F(MemoryMappedFileTest, MapLargePartialRegionInTheMiddleWithWrite) {
+  const size_t kFileSize = 157 * 1024;
+  const size_t kOffset = 1024 * 5 + 32;
+  const size_t kPartialSize = 16 * 1024 - 32;
+
+  CreateTemporaryTestFile(kFileSize);
+  MemoryMappedFile map;
+
+  File file(temp_file_path(), File::FLAG_OPEN |
+                              File::FLAG_READ |
+                              File::FLAG_WRITE);
+  map.Initialize(
+      file.Pass(), MemoryMappedFile::Region(kOffset, kPartialSize), true);
+  ASSERT_EQ(kPartialSize, map.length());
+  ASSERT_TRUE(map.data() != NULL);
+  EXPECT_TRUE(map.IsValid());
+  ASSERT_TRUE(CheckBufferContents(map.data(), kPartialSize, kOffset));
+
+  const char* test_string = "TEST_STRING";
+  memcpy(map.data(), test_string, strlen(test_string));
+  map.CloseHandles();
+
+  MemoryMappedFile read_map;
+  read_map.Initialize(File(temp_file_path(), File::FLAG_OPEN |
+                                             File::FLAG_READ));
+  ASSERT_EQ(kFileSize, read_map.length());
+  ASSERT_TRUE(read_map.data() != NULL);
+  EXPECT_TRUE(read_map.IsValid());
+  ASSERT_TRUE(
+      memcmp(read_map.data() + kOffset, test_string, strlen(test_string)) == 0);

[wuchengli, 2014/09/01 06:57:15]

Use CheckBufferContents with a non-0 offset?

[henryhsu, 2014/09/01 07:49:49]

Done.

+}
+
 }  // namespace
 
 }  // namespace base