AAPT2

First checking of AAPT2. The individual phases of AAPT2 work, but there
are some missing pieces.

For early testing we are missing:
- Need to properly mark file references and include them in package
- Need to package into zip

Final AAPT for apps we are missing:
- Need to crush PNGs
- Need to parse 9-patches
- Need to validate all of AndroidManifest.xml
- Need to write align method to align resource tables for splits.

Final AAPT for apps + system we are missing:
- Need to handle overlays
- Need to store comments for R file
- Need to handle --shared-lib (dynamic references too).

New AAPT features coming:
- Need to import compiled libraries
    - Name mangling
    - R file generation for library code

Change-Id: I95f8a63581b81a1f424ae6fb2c373c883b72c18d
diff --git a/tools/aapt2/XmlFlattener_test.cpp b/tools/aapt2/XmlFlattener_test.cpp
new file mode 100644
index 0000000..79030be
--- /dev/null
+++ b/tools/aapt2/XmlFlattener_test.cpp
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "Resolver.h"
+#include "ResourceTable.h"
+#include "ResourceValues.h"
+#include "SourceXmlPullParser.h"
+#include "Util.h"
+#include "XmlFlattener.h"
+
+#include <androidfw/AssetManager.h>
+#include <androidfw/ResourceTypes.h>
+#include <gtest/gtest.h>
+#include <sstream>
+#include <string>
+
+namespace aapt {
+
+constexpr const char* kXmlPreamble = "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n";
+
+class XmlFlattenerTest : public ::testing::Test {
+public:
+    virtual void SetUp() override {
+        std::shared_ptr<ResourceTable> table = std::make_shared<ResourceTable>();
+        table->setPackage(u"android");
+        table->setPackageId(0x01);
+
+        table->addResource(ResourceName{ {}, ResourceType::kAttr, u"id" },
+                           ResourceId{ 0x01010000 }, {}, {},
+                           util::make_unique<Attribute>(false, android::ResTable_map::TYPE_ANY));
+
+        table->addResource(ResourceName{ {}, ResourceType::kId, u"test" },
+                           ResourceId{ 0x01020000 }, {}, {}, util::make_unique<Id>());
+
+        mFlattener = std::make_shared<XmlFlattener>(
+                std::make_shared<Resolver>(table, std::make_shared<android::AssetManager>()));
+    }
+
+    ::testing::AssertionResult testFlatten(std::istream& in, android::ResXMLTree* outTree) {
+        std::stringstream input(kXmlPreamble);
+        input << in.rdbuf() << std::endl;
+        std::shared_ptr<XmlPullParser> xmlParser = std::make_shared<SourceXmlPullParser>(input);
+        BigBuffer outBuffer(1024);
+        if (!mFlattener->flatten(Source{ "test" }, xmlParser, &outBuffer, {})) {
+            return ::testing::AssertionFailure();
+        }
+
+        std::unique_ptr<uint8_t[]> data = util::copy(outBuffer);
+        if (outTree->setTo(data.get(), outBuffer.size(), true) != android::NO_ERROR) {
+            return ::testing::AssertionFailure();
+        }
+        return ::testing::AssertionSuccess();
+    }
+
+    std::shared_ptr<XmlFlattener> mFlattener;
+};
+
+TEST_F(XmlFlattenerTest, ParseSimpleView) {
+    std::stringstream input;
+    input << "<View xmlns:android=\"http://schemas.android.com/apk/res/android\"" << std::endl
+          << "      android:id=\"@id/test\">" << std::endl
+          << "</View>" << std::endl;
+
+    android::ResXMLTree tree;
+    ASSERT_TRUE(testFlatten(input, &tree));
+
+    while (tree.next() != android::ResXMLTree::END_DOCUMENT) {
+        ASSERT_NE(tree.getEventType(), android::ResXMLTree::BAD_DOCUMENT);
+    }
+}
+
+} // namespace aapt