Compressing .pak resources with new option: "type=GZIPPABLE_BINDATA"

ui/base/resource/resource_bundle_unittest.cc

 // Copyright (c) 2012 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 "ui/base/resource/resource_bundle.h"
 
 #include <stddef.h>
 #include <stdint.h>
+#include <string.h>
 
 #include "base/base_paths.h"
 #include "base/big_endian.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted_memory.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 244 matching lines @@
   ui::ScaleFactor scale_factor = ui::SCALE_FACTOR_NONE;
 
   EXPECT_CALL(delegate, LoadDataResourceBytes(resource_id, scale_factor))
       .Times(1).WillOnce(Return(static_memory.get()));
 
   scoped_refptr<base::RefCountedMemory> result =
       resource_bundle->LoadDataResourceBytesForScale(resource_id, scale_factor);
   EXPECT_EQ(static_memory, result);
 }
 
+TEST_F(ResourceBundleTest, LoadDataResourceBytesGzip) {
+  base::ScopedTempDir dir;
+  ASSERT_TRUE(dir.CreateUniqueTempDir());
+  base::FilePath data_path = dir.path().Append(FILE_PATH_LITERAL("sample.pak"));
+
+  char kCompressedEntryPakContents[] = {
+      0x04u, 0x00u, 0x00u, 0x00u,                // header(version
+      0x01u, 0x00u, 0x00u, 0x00u,                //        no. entries
+      0x01u,                                     //        encoding)
+      0x04u, 0x00u, 0x15u, 0x00u, 0x00u, 0x00u,  // index entry 4
+      0x00u, 0x00u, 0x3bu, 0x00u, 0x00u,
+      0x00u,  // extra entry for the size of last
+      // Entry 4 is a compressed gzip file (with custom leading byte) saying:
+      // "This is compressed\n"
+      ResourceBundle::CUSTOM_GZIP_HEADER[0], 0x1fu, 0x8bu, 0x08u, 0x00u, 0x00u,
+      0x00u, 0x00u, 0x00u, 0x00u, 0x03u, 0x0bu, 0xc9u, 0xc8u, 0x2cu, 0x56u,
+      0x00u, 0xa2u, 0xe4u, 0xfcu, 0xdcu, 0x82u, 0xa2u, 0xd4u, 0xe2u, 0xe2u,
+      0xd4u, 0x14u, 0x2eu, 0x00u, 0xd9u, 0xf8u, 0xc4u, 0x6fu, 0x13u, 0x00u,
+      0x00u, 0x00u};
+
+  size_t compressed_entry_pak_size = sizeof(kCompressedEntryPakContents);
+
+  // Dump contents into the pak file.
+  ASSERT_EQ(base::WriteFile(data_path, kCompressedEntryPakContents,
+      compressed_entry_pak_size), static_cast<int>(compressed_entry_pak_size));
+
+  ResourceBundle* resource_bundle = CreateResourceBundle(nullptr);
+  resource_bundle->AddDataPackFromPath(data_path, SCALE_FACTOR_NONE);
+
+  // Load the compressed resource.
+  scoped_refptr<base::RefCountedMemory> result =
+      resource_bundle->LoadDataResourceBytes(4);
+  EXPECT_EQ(
+      strncmp("This is compressed\n",
+              reinterpret_cast<const char*>(result->front()), result->size()),
+      0);
+}
+
 TEST_F(ResourceBundleTest, DelegateGetRawDataResource) {
   MockResourceBundleDelegate delegate;
   ResourceBundle* resource_bundle = CreateResourceBundle(&delegate);
 
   // Create the string piece for testing purposes.
   char data[] = "My test data";
   base::StringPiece string_piece(data);
 
   int resource_id = 5;
 
@@ skipping 420 matching lines @@
   resource_bundle->AddDataPackFromPath(data_default_path, SCALE_FACTOR_NONE);
 
   gfx::ImageSkia* image_skia = resource_bundle->GetImageSkiaNamed(3);
   EXPECT_EQ(1u, image_skia->image_reps().size());
   EXPECT_TRUE(image_skia->image_reps()[0].unscaled());
   EXPECT_EQ(ui::SCALE_FACTOR_100P,
             GetSupportedScaleFactor(image_skia->image_reps()[0].scale()));
 }
 
 }  // namespace ui