[BlobStorage] Enforcing renderer constraints to prevent broken blobs

third_party/WebKit/Source/core/fileapi/FileTest.cpp

 // 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 "core/fileapi/File.h"
 
+#include "platform/FileMetadata.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace blink {
 
 TEST(FileTest, nativeFile) {
   File* const file = File::create("/native/path");
   EXPECT_TRUE(file->hasBackingFile());
   EXPECT_EQ("/native/path", file->path());
   EXPECT_TRUE(file->fileSystemURL().isEmpty());
 }
 
 TEST(FileTest, blobBackingFile) {
   const RefPtr<BlobDataHandle> blobDataHandle = BlobDataHandle::create();
   File* const file = File::create("name", 0.0, blobDataHandle);
   EXPECT_FALSE(file->hasBackingFile());
   EXPECT_TRUE(file->path().isEmpty());
   EXPECT_TRUE(file->fileSystemURL().isEmpty());
 }
 
 TEST(FileTest, fileSystemFileWithNativeSnapshot) {
   FileMetadata metadata;
   metadata.platformPath = "/native/snapshot";
   File* const file =
       File::createForFileSystemFile("name", metadata, File::IsUserVisible);
   EXPECT_TRUE(file->hasBackingFile());
   EXPECT_EQ("/native/snapshot", file->path());
   EXPECT_TRUE(file->fileSystemURL().isEmpty());
 }
 
+TEST(FileTest, fileSystemFileWithNativeSnapshotAndSize) {
+  FileMetadata metadata;
+  metadata.length = 1024ll;
+  metadata.platformPath = "/native/snapshot";
+  File* const file =
+      File::createForFileSystemFile("name", metadata, File::IsUserVisible);
+  EXPECT_TRUE(file->hasBackingFile());
+  EXPECT_EQ("/native/snapshot", file->path());
+  EXPECT_TRUE(file->fileSystemURL().isEmpty());
+}
+
 TEST(FileTest, fileSystemFileWithoutNativeSnapshot) {
   KURL url(ParsedURLStringTag(),
            "filesystem:http://example.com/isolated/hash/non-native-file");
   FileMetadata metadata;
   File* const file =
       File::createForFileSystemFile(url, metadata, File::IsUserVisible);
   EXPECT_FALSE(file->hasBackingFile());
   EXPECT_TRUE(file->path().isEmpty());
   EXPECT_EQ(url, file->fileSystemURL());
 }
@@ skipping 32 matching lines @@
   EXPECT_TRUE(blobFileA1->hasSameSource(*blobFileA1));
   EXPECT_TRUE(blobFileA1->hasSameSource(*blobFileA2));
   EXPECT_FALSE(blobFileA1->hasSameSource(*blobFileB));
 
   EXPECT_TRUE(fileSystemFileA1->hasSameSource(*fileSystemFileA1));
   EXPECT_TRUE(fileSystemFileA1->hasSameSource(*fileSystemFileA2));
   EXPECT_FALSE(fileSystemFileA1->hasSameSource(*fileSystemFileB));
 }
 
 }  // namespace blink