167 lines
6.8 KiB
C++
167 lines
6.8 KiB
C++
/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "optimize/ResourcePathShortener.h"
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#include "ResourceTable.h"
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#include "test/Test.h"
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using ::aapt::test::GetValue;
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using ::testing::Not;
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using ::testing::NotNull;
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using ::testing::Eq;
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android::StringPiece GetExtension(android::StringPiece path) {
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auto iter = std::find(path.begin(), path.end(), '.');
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return android::StringPiece(iter, path.end() - iter);
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}
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void FillTable(aapt::test::ResourceTableBuilder& builder, int start, int end) {
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for (int i=start; i<end; i++) {
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builder.AddFileReference(
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"android:drawable/xmlfile" + std::to_string(i),
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"res/drawable/xmlfile" + std::to_string(i) + ".xml");
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}
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}
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namespace aapt {
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TEST(ResourcePathShortenerTest, FileRefPathsChangedInResourceTable) {
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std::unique_ptr<IAaptContext> context = test::ContextBuilder().Build();
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std::unique_ptr<ResourceTable> table =
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test::ResourceTableBuilder()
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.AddFileReference("android:drawable/xmlfile", "res/drawables/xmlfile.xml")
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.AddFileReference("android:drawable/xmlfile2", "res/drawables/xmlfile2.xml")
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.AddString("android:string/string", "res/should/still/be/the/same.png")
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.Build();
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std::map<std::string, std::string> path_map;
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ASSERT_TRUE(ResourcePathShortener(path_map).Consume(context.get(), table.get()));
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// Expect that the path map is populated
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ASSERT_THAT(path_map.find("res/drawables/xmlfile.xml"), Not(Eq(path_map.end())));
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ASSERT_THAT(path_map.find("res/drawables/xmlfile2.xml"), Not(Eq(path_map.end())));
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// The file paths were changed
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EXPECT_THAT(path_map.at("res/drawables/xmlfile.xml"), Not(Eq("res/drawables/xmlfile.xml")));
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EXPECT_THAT(path_map.at("res/drawables/xmlfile2.xml"), Not(Eq("res/drawables/xmlfile2.xml")));
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// Different file paths should remain different
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EXPECT_THAT(path_map["res/drawables/xmlfile.xml"],
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Not(Eq(path_map["res/drawables/xmlfile2.xml"])));
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FileReference* ref =
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GetValue<FileReference>(table.get(), "android:drawable/xmlfile");
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ASSERT_THAT(ref, NotNull());
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// The map correctly points to the new location of the file
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EXPECT_THAT(path_map["res/drawables/xmlfile.xml"], Eq(*ref->path));
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// Strings should not be affected, only file paths
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EXPECT_THAT(
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*GetValue<String>(table.get(), "android:string/string")->value,
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Eq("res/should/still/be/the/same.png"));
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EXPECT_THAT(path_map.find("res/should/still/be/the/same.png"), Eq(path_map.end()));
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}
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TEST(ResourcePathShortenerTest, SkipColorFileRefPaths) {
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std::unique_ptr<IAaptContext> context = test::ContextBuilder().Build();
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std::unique_ptr<ResourceTable> table =
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test::ResourceTableBuilder()
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.AddFileReference("android:color/colorlist", "res/color/colorlist.xml")
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.AddFileReference("android:color/colorlist",
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"res/color-mdp-v21/colorlist.xml",
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test::ParseConfigOrDie("mdp-v21"))
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.Build();
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std::map<std::string, std::string> path_map;
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ASSERT_TRUE(ResourcePathShortener(path_map).Consume(context.get(), table.get()));
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// Expect that the path map to not contain the ColorStateList
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ASSERT_THAT(path_map.find("res/color/colorlist.xml"), Eq(path_map.end()));
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ASSERT_THAT(path_map.find("res/color-mdp-v21/colorlist.xml"), Eq(path_map.end()));
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}
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TEST(ResourcePathShortenerTest, KeepExtensions) {
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std::unique_ptr<IAaptContext> context = test::ContextBuilder().Build();
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std::string original_xml_path = "res/drawable/xmlfile.xml";
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std::string original_png_path = "res/drawable/pngfile.png";
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std::unique_ptr<ResourceTable> table =
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test::ResourceTableBuilder()
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.AddFileReference("android:color/xmlfile", original_xml_path)
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.AddFileReference("android:color/pngfile", original_png_path)
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.Build();
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std::map<std::string, std::string> path_map;
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ASSERT_TRUE(ResourcePathShortener(path_map).Consume(context.get(), table.get()));
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// Expect that the path map is populated
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ASSERT_THAT(path_map.find("res/drawable/xmlfile.xml"), Not(Eq(path_map.end())));
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ASSERT_THAT(path_map.find("res/drawable/pngfile.png"), Not(Eq(path_map.end())));
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auto shortend_xml_path = path_map[original_xml_path];
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auto shortend_png_path = path_map[original_png_path];
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EXPECT_THAT(GetExtension(path_map[original_xml_path]), Eq(android::StringPiece(".xml")));
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EXPECT_THAT(GetExtension(path_map[original_png_path]), Eq(android::StringPiece(".png")));
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}
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TEST(ResourcePathShortenerTest, DeterministicallyHandleCollisions) {
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std::unique_ptr<IAaptContext> context = test::ContextBuilder().Build();
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// 4000 resources is the limit at which the hash space is expanded to 3
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// letters to reduce collisions, we want as many collisions as possible thus
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// N-1.
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const auto kNumResources = 3999;
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const auto kNumTries = 5;
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test::ResourceTableBuilder builder1;
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FillTable(builder1, 0, kNumResources);
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std::unique_ptr<ResourceTable> table1 = builder1.Build();
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std::map<std::string, std::string> expected_mapping;
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ASSERT_TRUE(ResourcePathShortener(expected_mapping).Consume(context.get(), table1.get()));
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// We are trying to ensure lack of non-determinism, it is not simple to prove
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// a negative, thus we must try the test a few times so that the test itself
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// is non-flaky. Basically create the pathmap 5 times from the same set of
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// resources but a different order of addition and then ensure they are always
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// mapped to the same short path.
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for (int i=0; i<kNumTries; i++) {
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test::ResourceTableBuilder builder2;
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// This loop adds resources to the resource table in the range of
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// [0:kNumResources). Adding the file references in different order makes
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// non-determinism more likely to surface. Thus we add resources
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// [start_index:kNumResources) first then [0:start_index). We also use a
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// different start_index each run.
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int start_index = (kNumResources/kNumTries)*i;
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FillTable(builder2, start_index, kNumResources);
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FillTable(builder2, 0, start_index);
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std::unique_ptr<ResourceTable> table2 = builder2.Build();
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std::map<std::string, std::string> actual_mapping;
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ASSERT_TRUE(ResourcePathShortener(actual_mapping).Consume(context.get(), table2.get()));
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for (auto& item : actual_mapping) {
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ASSERT_THAT(expected_mapping[item.first], Eq(item.second));
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}
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}
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}
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} // namespace aapt
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