add unit testing

README.md

@@ -7,7 +7,7 @@ To understand  The software-defined networking well, I trying to create a simple
 ## TODOs
 
 - [x] design structure of code and working.
-- [ ] test case. ([Read docs](https://doc.rust-lang.org/book/ch11-01-writing-tests.html))
+- [x] test case. ([Read docs](https://doc.rust-lang.org/book/ch11-01-writing-tests.html))
 - [ ] write more description in README.
 
 ## Learning resources

tests/headers.rs

@@ -0,0 +1,24 @@
+#[cfg(test)]
+mod tests {
+    use tenjin::{
+        openflow::{
+            controller_frame::ControllerFrame, ofp_manager::OfpMsgEvent, ofp_v1_0::Openflow10,
+        },
+        Controller,
+    };
+
+    #[test]
+    fn test_header_v1_0_parser() {
+        let ofp_header_bytes: Vec<u8> = vec![1, 0, 0, 8, 0, 0, 0, 1];
+
+        let controller = Controller::new(Openflow10::new());
+        let ofp = controller.get_ofp();
+
+        let header = ofp.header_parse(&ofp_header_bytes);
+
+        assert_eq!(header.version(), 1);
+        assert_eq!(header.message(), 0);
+        assert_eq!(header.length(), 8);
+        assert_eq!(header.xid(), 1);
+    }
+}