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/Maybe_test.cpp b/tools/aapt2/Maybe_test.cpp
new file mode 100644
index 0000000..348d7dd
--- /dev/null
+++ b/tools/aapt2/Maybe_test.cpp
@@ -0,0 +1,69 @@
+/*
+ * 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 <gtest/gtest.h>
+#include <string>
+
+#include "Maybe.h"
+
+namespace aapt {
+
+struct Dummy {
+    Dummy() {
+        std::cerr << "Constructing Dummy " << (void *) this << std::endl;
+    }
+
+    Dummy(const Dummy& rhs) {
+        std::cerr << "Copying Dummy " << (void *) this << " from " << (const void*) &rhs << std::endl;
+    }
+
+    Dummy(Dummy&& rhs) {
+        std::cerr << "Moving Dummy " << (void *) this << " from " << (void*) &rhs << std::endl;
+    }
+
+    ~Dummy() {
+        std::cerr << "Destroying Dummy " << (void *) this << std::endl;
+    }
+};
+
+TEST(MaybeTest, MakeNothing) {
+    Maybe<int> val = make_nothing<int>();
+    EXPECT_FALSE(val);
+
+    Maybe<std::string> val2 = make_nothing<std::string>();
+    EXPECT_FALSE(val2);
+
+    val2 = make_nothing<std::string>();
+    EXPECT_FALSE(val2);
+}
+
+TEST(MaybeTest, MakeSomething) {
+    Maybe<int> val = make_value(23);
+    ASSERT_TRUE(val);
+    EXPECT_EQ(23, val.value());
+
+    Maybe<std::string> val2 = make_value(std::string("hey"));
+    ASSERT_TRUE(val2);
+    EXPECT_EQ(std::string("hey"), val2.value());
+}
+
+TEST(MaybeTest, Lifecycle) {
+    Maybe<Dummy> val = make_nothing<Dummy>();
+
+    Maybe<Dummy> val2 = make_value(Dummy());
+}
+
+} // namespace aapt