AssetManager2: Add GetResourceId

Add ability to lookup a resource by name.

Test: make libandroidfw_tests
Change-Id: I262ba5ce4c9892458226fbdb44cf21f9877fb92d
diff --git a/libs/androidfw/tests/ResourceUtils_test.cpp b/libs/androidfw/tests/ResourceUtils_test.cpp
new file mode 100644
index 0000000..b64a884
--- /dev/null
+++ b/libs/androidfw/tests/ResourceUtils_test.cpp
@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2017 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 "androidfw/ResourceUtils.h"
+
+#include "TestHelpers.h"
+
+namespace android {
+
+TEST(ResourceUtilsTest, ExtractResourceName) {
+  StringPiece package, type, entry;
+  ASSERT_TRUE(ExtractResourceName("android:string/foo", &package, &type, &entry));
+  EXPECT_EQ("android", package);
+  EXPECT_EQ("string", type);
+  EXPECT_EQ("foo", entry);
+
+  ASSERT_TRUE(ExtractResourceName("string/foo", &package, &type, &entry));
+  EXPECT_EQ("", package);
+  EXPECT_EQ("string", type);
+  EXPECT_EQ("foo", entry);
+
+  ASSERT_TRUE(ExtractResourceName("foo", &package, &type, &entry));
+  EXPECT_EQ("", package);
+  EXPECT_EQ("", type);
+  EXPECT_EQ("foo", entry);
+
+  ASSERT_TRUE(ExtractResourceName("android:foo", &package, &type, &entry));
+  EXPECT_EQ("android", package);
+  EXPECT_EQ("", type);
+  EXPECT_EQ("foo", entry);
+
+  EXPECT_FALSE(ExtractResourceName(":string/foo", &package, &type, &entry));
+  EXPECT_FALSE(ExtractResourceName("/foo", &package, &type, &entry));
+}
+
+}  // namespace android