WIP - Implement abstractions for working with bytes

test/test_byte_buf.rs

@@ -0,0 +1,46 @@
+use bytes::ByteBuf;
+use bytes::traits::*;
+
+#[test]
+pub fn test_initial_buf_empty() {
+    let buf = ByteBuf::mut_with_capacity(100);
+
+    assert!(buf.capacity() == 128);
+    assert!(buf.remaining() == 128);
+
+    let buf = buf.flip();
+
+    assert!(buf.remaining() == 0);
+
+    let buf = buf.flip();
+
+    assert!(buf.remaining() == 128);
+}
+
+#[test]
+pub fn test_byte_buf_read_write() {
+    let mut buf = ByteBuf::mut_with_capacity(32);
+
+    buf.write(b"hello world").unwrap();
+    assert_eq!(21, buf.remaining());
+
+    buf.write(b" goodbye").unwrap();
+    assert_eq!(13, buf.remaining());
+
+    let mut buf = buf.flip();
+    let mut dst = [0; 5];
+
+    assert_eq!(5, buf.read(dst.as_mut_slice()).unwrap());
+    assert_eq!(b"hello", dst);
+
+    assert_eq!(5, buf.read(dst.as_mut_slice()).unwrap());
+    assert_eq!(b" worl", dst);
+
+    let mut dst = [0; 2];
+    assert_eq!(2, buf.read(dst.as_mut_slice()).unwrap());
+    assert_eq!(b"d ", dst);
+
+    let mut dst = [0; 7];
+    assert_eq!(7, buf.read(dst.as_mut_slice()).unwrap());
+    assert_eq!(b"goodbye", dst);
+}