add test case for syntax
tree664a34aaf12f9e66bdba45efb93c3f069fcd8380
-rw-r--r-- 8 .gitignore
drwxr-xr-x - .vscode
-rw-r--r-- 137 Cargo.lock
-rw-r--r-- 227 Cargo.toml
drwxr-xr-x - src