game event writing

src/lib.rs

@@ -15,7 +15,7 @@ mod nullhasher;
 
 #[cfg(test)]
 #[track_caller]
-fn test_roundtrip_encode<
+fn test_roundtrip_write<
     'a,
     T: bitbuffer::BitRead<'a, bitbuffer::LittleEndian>
         + bitbuffer::BitWrite<bitbuffer::LittleEndian>
@@ -41,6 +41,40 @@ fn test_roundtrip_encode<
     assert_eq!(
         pos,
         read.pos(),
-        "Failed to assert that all encoded bytes are used for decoding"
+        "Failed to assert that all encoded bits ({}) are used for decoding ({})",
+        pos,
+        read.pos()
+    );
+}
+
+#[cfg(test)]
+#[track_caller]
+fn test_roundtrip_encode<
+    'a,
+    T: Parse<'a> + crate::demo::parser::Encode + std::fmt::Debug + std::cmp::PartialEq,
+>(
+    val: T,
+    state: &ParserState,
+) {
+    let mut data = Vec::with_capacity(128);
+    use bitbuffer::{BitReadBuffer, BitReadStream, BitWriteStream, LittleEndian};
+    let pos = {
+        let mut stream = BitWriteStream::new(&mut data, LittleEndian);
+        val.encode(&mut stream, state).unwrap();
+        stream.bit_len()
+    };
+
+    let mut read = BitReadStream::new(BitReadBuffer::new_owned(data, LittleEndian));
+    assert_eq!(
+        val,
+        T::parse(&mut read, state).unwrap(),
+        "Failed to assert the parsed message is equal to the original"
+    );
+    assert_eq!(
+        pos,
+        read.pos(),
+        "Failed to assert that all encoded bits ({}) are used for decoding ({})",
+        pos,
+        read.pos()
     );
 }