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 "base/base_paths.h"
@@ skipping 252 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 compressedEntryPakContents[] = {
+      0x04, 0x00, 0x00, 0x00,              // header(version
+      0x01, 0x00, 0x00, 0x00,              //        no. entries
+      0x01,                                //        encoding)
+      0x04, 0x00, 0x15, 0x00, 0x00, 0x00,  // index entry 4
+      0x00, 0x00, 0x3b, 0x00, 0x00, 0x00,  // 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], 0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x03, 0x0b, 0xc9, 0xc8, 0x2c, 0x56, 0x00, 0xa2, 0xe4,
+      0xfc, 0xdc, 0x82, 0xa2, 0xd4, 0xe2, 0xe2, 0xd4, 0x14, 0x2e, 0x00, 0xd9,
+      0xf8, 0xc4, 0x6f, 0x13, 0x00, 0x00, 0x00};
+
+  size_t compressedEntryPakSize = sizeof(compressedEntryPakContents);
+
+  // Dump contents into the pak file.
+  ASSERT_EQ(base::WriteFile(data_path, compressedEntryPakContents,
+      compressedEntryPakSize), static_cast<int>(compressedEntryPakSize));
+
+  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_STREQ("This is compressed\n",
+               reinterpret_cast<const char*>(result->front()));
+}
+
 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