Add test files

Author: soimkim

tests/test_files/sample.cpp

@@ -0,0 +1,15 @@
+/*
+  * SPDX-FileCopyrightText: Copyright 2022 LG Electronics Inc.
+  * SPDX-License-Identifier: Apache-2.0
+  * DownloadLocation: https://github.com/browserify/acorn-node
+  * SPDX-FileCopyrightText: Copyright 2017 Free Software Foundation Europe e.V.
+  * SPDX-License-Identifier: MIT
+  * DownloadLocation: https://github.com/fsfe/reuse-tool 
+ */
+#include <iostream>
+
+int main()
+{
+    std::cout << "Hello, world!" << std::endl;
+    return 0;
+}

tests/test_files/temp.cpp

@@ -0,0 +1,12 @@
+/*
+  * SPDX-FileCopyrightText: Copyright 2022 LG Electronics Inc.
+  * SPDX-License-Identifier: Apache-2.0
+  * DownloadLocation: https://github.com/browserify/acorn-node
+ */
+#include <iostream>
+
+int main()
+{
+    std::cout << "Hello, world!" << std::endl;
+    return 0;
+}