[bencode] Implement round trip test

src/bencode.rs

@@ -1,4 +1,48 @@
 pub mod custom;
 pub mod de;
 pub mod ser;
-pub mod error;
+pub  mod error;
+
+#[cfg(test)]
+mod test {
+    use std::collections::HashMap;
+    use serde::{Deserialize, Serialize};
+    use crate::bencode::de::from_bytes;
+    use crate::bencode::ser::to_bytes;
+
+    #[test]
+    fn test_roundtrip() {
+        #[derive(Serialize, Deserialize, PartialEq, Debug)]
+        struct A {
+            l: Vec<String>,
+            li: Vec<i32>,
+            m: HashMap<String, String>,
+            b: Vec<[u8; 4]>
+        }
+
+        let a = A {
+            l: vec!["foo".to_string(), "bar".to_string(), "".to_string(), "💩".to_string()],
+            li: vec![18, 7, 26, 8, 9],
+            m: HashMap::from([
+                ("foo".to_string(), "bar".to_string()),
+                ("💩".to_string(), "🤷‍♂️".to_string()),
+                ("18".to_string(), "asdf".to_string())
+            ]),
+            b: vec![
+                [4, 26, 7, 18],
+                [24, 13, 12, 4],
+                [8, 9, 10, 11]
+            ],
+        };
+
+        let ser = to_bytes(&a).unwrap();
+
+        let de = from_bytes(&ser).unwrap();
+
+        assert_eq!(a, de);
+
+        let ser2 = to_bytes(&de).unwrap();
+
+        assert_eq!(ser, ser2)
+    }
+}