Migrated dexlist from Dalvik (libdex) into Art (libart)

Rationale:
The new dexlist (temporarily called dexlist2 until we are
satisfied with the migration) is a re-implementation of the
original dexlist utility that was based on Dalvik functions
in libdex into a new dexlist that is now based on Art functions
in libart instead.

Bug: 22322814
Change-Id: I0f034d66c1a1f3c5450423f57fcdc23e2f5a1e29
diff --git a/dexlist/dexlist_test.cc b/dexlist/dexlist_test.cc
new file mode 100644
index 0000000..7b1b63d
--- /dev/null
+++ b/dexlist/dexlist_test.cc
@@ -0,0 +1,88 @@
+/*
+ * 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 <string>
+#include <vector>
+#include <sstream>
+
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "base/stringprintf.h"
+#include "common_runtime_test.h"
+#include "runtime/arch/instruction_set.h"
+#include "runtime/gc/heap.h"
+#include "runtime/gc/space/image_space.h"
+#include "runtime/os.h"
+#include "runtime/utils.h"
+#include "utils.h"
+
+namespace art {
+
+class DexListTest : public CommonRuntimeTest {
+ protected:
+  virtual void SetUp() {
+    CommonRuntimeTest::SetUp();
+    // Dogfood our own lib core dex file.
+    dex_file_ = GetLibCoreDexFileName();
+  }
+
+  // Runs test with given arguments.
+  bool Exec(const std::vector<std::string>& args, std::string* error_msg) {
+    // TODO(ajcbik): dexlist2 -> dexlist
+    std::string file_path = GetTestAndroidRoot();
+    if (IsHost()) {
+      file_path += "/bin/dexlist2";
+    } else {
+      file_path += "/xbin/dexlist2";
+    }
+    EXPECT_TRUE(OS::FileExists(file_path.c_str())) << file_path << " should be a valid file path";
+    std::vector<std::string> exec_argv = { file_path };
+    exec_argv.insert(exec_argv.end(), args.begin(), args.end());
+    return ::art::Exec(exec_argv, error_msg);
+  }
+
+  std::string dex_file_;
+};
+
+
+TEST_F(DexListTest, NoInputFileGiven) {
+  std::string error_msg;
+  ASSERT_FALSE(Exec({}, &error_msg)) << error_msg;
+}
+
+TEST_F(DexListTest, CantOpenOutput) {
+  std::string error_msg;
+  ASSERT_FALSE(Exec({"-o", "/joho", dex_file_}, &error_msg)) << error_msg;
+}
+
+TEST_F(DexListTest, IllFormedMethod) {
+  std::string error_msg;
+  ASSERT_FALSE(Exec({"-m", "joho", dex_file_}, &error_msg)) << error_msg;
+}
+
+TEST_F(DexListTest, FullOutput) {
+  std::string error_msg;
+  ASSERT_TRUE(Exec({"-o", "/dev/null", dex_file_}, &error_msg)) << error_msg;
+}
+
+TEST_F(DexListTest, MethodOutput) {
+  std::string error_msg;
+  ASSERT_TRUE(Exec({"-o", "/dev/null", "-m", "java.lang.Object.toString",
+    dex_file_}, &error_msg)) << error_msg;
+}
+
+}  // namespace art