1 files changed, 464 insertions, 0 deletions
diff --git a/tests/codecs.rs b/tests/codecs.rs
new file mode 100644
index 0000000..f9a7801
--- /dev/null
+++ b/tests/codecs.rs
@@ -0,0 +1,464 @@
+#![warn(rust_2018_idioms)]
+
+use tokio_util::codec::{AnyDelimiterCodec, BytesCodec, Decoder, Encoder, LinesCodec};
+
+use bytes::{BufMut, Bytes, BytesMut};
+
+#[test]
+fn bytes_decoder() {
+    let mut codec = BytesCodec::new();
+    let buf = &mut BytesMut::new();
+    buf.put_slice(b"abc");
+    assert_eq!("abc", codec.decode(buf).unwrap().unwrap());
+    assert_eq!(None, codec.decode(buf).unwrap());
+    assert_eq!(None, codec.decode(buf).unwrap());
+    buf.put_slice(b"a");
+    assert_eq!("a", codec.decode(buf).unwrap().unwrap());
+}
+
+#[test]
+fn bytes_encoder() {
+    let mut codec = BytesCodec::new();
+
+    // Default capacity of BytesMut
+    #[cfg(target_pointer_width = "64")]
+    const INLINE_CAP: usize = 4 * 8 - 1;
+    #[cfg(target_pointer_width = "32")]
+    const INLINE_CAP: usize = 4 * 4 - 1;
+
+    let mut buf = BytesMut::new();
+    codec
+        .encode(Bytes::from_static(&[0; INLINE_CAP + 1]), &mut buf)
+        .unwrap();
+
+    // Default capacity of Framed Read
+    const INITIAL_CAPACITY: usize = 8 * 1024;
+
+    let mut buf = BytesMut::with_capacity(INITIAL_CAPACITY);
+    codec
+        .encode(Bytes::from_static(&[0; INITIAL_CAPACITY + 1]), &mut buf)
+        .unwrap();
+    codec
+        .encode(BytesMut::from(&b"hello"[..]), &mut buf)
+        .unwrap();
+}
+
+#[test]
+fn lines_decoder() {
+    let mut codec = LinesCodec::new();
+    let buf = &mut BytesMut::new();
+    buf.reserve(200);
+    buf.put_slice(b"line 1\nline 2\r\nline 3\n\r\n\r");
+    assert_eq!("line 1", codec.decode(buf).unwrap().unwrap());
+    assert_eq!("line 2", codec.decode(buf).unwrap().unwrap());
+    assert_eq!("line 3", codec.decode(buf).unwrap().unwrap());
+    assert_eq!("", codec.decode(buf).unwrap().unwrap());
+    assert_eq!(None, codec.decode(buf).unwrap());
+    assert_eq!(None, codec.decode_eof(buf).unwrap());
+    buf.put_slice(b"k");
+    assert_eq!(None, codec.decode(buf).unwrap());
+    assert_eq!("\rk", codec.decode_eof(buf).unwrap().unwrap());
+    assert_eq!(None, codec.decode(buf).unwrap());
+    assert_eq!(None, codec.decode_eof(buf).unwrap());
+}
+
+#[test]
+fn lines_decoder_max_length() {
+    const MAX_LENGTH: usize = 6;
+
+    let mut codec = LinesCodec::new_with_max_length(MAX_LENGTH);
+    let buf = &mut BytesMut::new();
+
+    buf.reserve(200);
+    buf.put_slice(b"line 1 is too long\nline 2\nline 3\r\nline 4\n\r\n\r");
+
+    assert!(codec.decode(buf).is_err());
+
+    let line = codec.decode(buf).unwrap().unwrap();
+    assert!(
+        line.len() <= MAX_LENGTH,
+        "{:?}.len() <= {:?}",
+        line,
+        MAX_LENGTH
+    );
+    assert_eq!("line 2", line);
+
+    assert!(codec.decode(buf).is_err());
+
+    let line = codec.decode(buf).unwrap().unwrap();
+    assert!(
+        line.len() <= MAX_LENGTH,
+        "{:?}.len() <= {:?}",
+        line,
+        MAX_LENGTH
+    );
+    assert_eq!("line 4", line);
+
+    let line = codec.decode(buf).unwrap().unwrap();
+    assert!(
+        line.len() <= MAX_LENGTH,
+        "{:?}.len() <= {:?}",
+        line,
+        MAX_LENGTH
+    );
+    assert_eq!("", line);
+
+    assert_eq!(None, codec.decode(buf).unwrap());
+    assert_eq!(None, codec.decode_eof(buf).unwrap());
+    buf.put_slice(b"k");
+    assert_eq!(None, codec.decode(buf).unwrap());
+
+    let line = codec.decode_eof(buf).unwrap().unwrap();
+    assert!(
+        line.len() <= MAX_LENGTH,
+        "{:?}.len() <= {:?}",
+        line,
+        MAX_LENGTH
+    );
+    assert_eq!("\rk", line);
+
+    assert_eq!(None, codec.decode(buf).unwrap());
+    assert_eq!(None, codec.decode_eof(buf).unwrap());
+
+    // Line that's one character too long. This could cause an out of bounds
+    // error if we peek at the next characters using slice indexing.
+    buf.put_slice(b"aaabbbc");
+    assert!(codec.decode(buf).is_err());
+}
+
+#[test]
+fn lines_decoder_max_length_underrun() {
+    const MAX_LENGTH: usize = 6;
+
+    let mut codec = LinesCodec::new_with_max_length(MAX_LENGTH);
+    let buf = &mut BytesMut::new();
+
+    buf.reserve(200);
+    buf.put_slice(b"line ");
+    assert_eq!(None, codec.decode(buf).unwrap());
+    buf.put_slice(b"too l");
+    assert!(codec.decode(buf).is_err());
+    buf.put_slice(b"ong\n");
+    assert_eq!(None, codec.decode(buf).unwrap());
+
+    buf.put_slice(b"line 2");
+    assert_eq!(None, codec.decode(buf).unwrap());
+    buf.put_slice(b"\n");
+    assert_eq!("line 2", codec.decode(buf).unwrap().unwrap());
+}
+
+#[test]
+fn lines_decoder_max_length_bursts() {
+    const MAX_LENGTH: usize = 10;
+
+    let mut codec = LinesCodec::new_with_max_length(MAX_LENGTH);
+    let buf = &mut BytesMut::new();
+
+    buf.reserve(200);
+    buf.put_slice(b"line ");
+    assert_eq!(None, codec.decode(buf).unwrap());
+    buf.put_slice(b"too l");
+    assert_eq!(None, codec.decode(buf).unwrap());
+    buf.put_slice(b"ong\n");
+    assert!(codec.decode(buf).is_err());
+}
+
+#[test]
+fn lines_decoder_max_length_big_burst() {
+    const MAX_LENGTH: usize = 10;
+
+    let mut codec = LinesCodec::new_with_max_length(MAX_LENGTH);
+    let buf = &mut BytesMut::new();
+
+    buf.reserve(200);
+    buf.put_slice(b"line ");
+    assert_eq!(None, codec.decode(buf).unwrap());
+    buf.put_slice(b"too long!\n");
+    assert!(codec.decode(buf).is_err());
+}
+
+#[test]
+fn lines_decoder_max_length_newline_between_decodes() {
+    const MAX_LENGTH: usize = 5;
+
+    let mut codec = LinesCodec::new_with_max_length(MAX_LENGTH);
+    let buf = &mut BytesMut::new();
+
+    buf.reserve(200);
+    buf.put_slice(b"hello");
+    assert_eq!(None, codec.decode(buf).unwrap());
+
+    buf.put_slice(b"\nworld");
+    assert_eq!("hello", codec.decode(buf).unwrap().unwrap());
+}
+
+// Regression test for [infinite loop bug](https://github.com/tokio-rs/tokio/issues/1483)
+#[test]
+fn lines_decoder_discard_repeat() {
+    const MAX_LENGTH: usize = 1;
+
+    let mut codec = LinesCodec::new_with_max_length(MAX_LENGTH);
+    let buf = &mut BytesMut::new();
+
+    buf.reserve(200);
+    buf.put_slice(b"aa");
+    assert!(codec.decode(buf).is_err());
+    buf.put_slice(b"a");
+    assert_eq!(None, codec.decode(buf).unwrap());
+}
+
+// Regression test for [subsequent calls to LinesCodec decode does not return the desired results bug](https://github.com/tokio-rs/tokio/issues/3555)
+#[test]
+fn lines_decoder_max_length_underrun_twice() {
+    const MAX_LENGTH: usize = 11;
+
+    let mut codec = LinesCodec::new_with_max_length(MAX_LENGTH);
+    let buf = &mut BytesMut::new();
+
+    buf.reserve(200);
+    buf.put_slice(b"line ");
+    assert_eq!(None, codec.decode(buf).unwrap());
+    buf.put_slice(b"too very l");
+    assert!(codec.decode(buf).is_err());
+    buf.put_slice(b"aaaaaaaaaaaaaaaaaaaaaaa");
+    assert_eq!(None, codec.decode(buf).unwrap());
+    buf.put_slice(b"ong\nshort\n");
+    assert_eq!("short", codec.decode(buf).unwrap().unwrap());
+}
+
+#[test]
+fn lines_encoder() {
+    let mut codec = LinesCodec::new();
+    let mut buf = BytesMut::new();
+
+    codec.encode("line 1", &mut buf).unwrap();
+    assert_eq!("line 1\n", buf);
+
+    codec.encode("line 2", &mut buf).unwrap();
+    assert_eq!("line 1\nline 2\n", buf);
+}
+
+#[test]
+fn any_delimiters_decoder_any_character() {
+    let mut codec = AnyDelimiterCodec::new(b",;\n\r".to_vec(), b",".to_vec());
+    let buf = &mut BytesMut::new();
+    buf.reserve(200);
+    buf.put_slice(b"chunk 1,chunk 2;chunk 3\n\r");
+    assert_eq!("chunk 1", codec.decode(buf).unwrap().unwrap());
+    assert_eq!("chunk 2", codec.decode(buf).unwrap().unwrap());
+    assert_eq!("chunk 3", codec.decode(buf).unwrap().unwrap());
+    assert_eq!("", codec.decode(buf).unwrap().unwrap());
+    assert_eq!(None, codec.decode(buf).unwrap());
+    assert_eq!(None, codec.decode_eof(buf).unwrap());
+    buf.put_slice(b"k");
+    assert_eq!(None, codec.decode(buf).unwrap());
+    assert_eq!("k", codec.decode_eof(buf).unwrap().unwrap());
+    assert_eq!(None, codec.decode(buf).unwrap());
+    assert_eq!(None, codec.decode_eof(buf).unwrap());
+}
+
+#[test]
+fn any_delimiters_decoder_max_length() {
+    const MAX_LENGTH: usize = 7;
+
+    let mut codec =
+        AnyDelimiterCodec::new_with_max_length(b",;\n\r".to_vec(), b",".to_vec(), MAX_LENGTH);
+    let buf = &mut BytesMut::new();
+
+    buf.reserve(200);
+    buf.put_slice(b"chunk 1 is too long\nchunk 2\nchunk 3\r\nchunk 4\n\r\n");
+
+    assert!(codec.decode(buf).is_err());
+
+    let chunk = codec.decode(buf).unwrap().unwrap();
+    assert!(
+        chunk.len() <= MAX_LENGTH,
+        "{:?}.len() <= {:?}",
+        chunk,
+        MAX_LENGTH
+    );
+    assert_eq!("chunk 2", chunk);
+
+    let chunk = codec.decode(buf).unwrap().unwrap();
+    assert!(
+        chunk.len() <= MAX_LENGTH,
+        "{:?}.len() <= {:?}",
+        chunk,
+        MAX_LENGTH
+    );
+    assert_eq!("chunk 3", chunk);
+
+    // \r\n cause empty chunk
+    let chunk = codec.decode(buf).unwrap().unwrap();
+    assert!(
+        chunk.len() <= MAX_LENGTH,
+        "{:?}.len() <= {:?}",
+        chunk,
+        MAX_LENGTH
+    );
+    assert_eq!("", chunk);
+
+    let chunk = codec.decode(buf).unwrap().unwrap();
+    assert!(
+        chunk.len() <= MAX_LENGTH,
+        "{:?}.len() <= {:?}",
+        chunk,
+        MAX_LENGTH
+    );
+    assert_eq!("chunk 4", chunk);
+
+    let chunk = codec.decode(buf).unwrap().unwrap();
+    assert!(
+        chunk.len() <= MAX_LENGTH,
+        "{:?}.len() <= {:?}",
+        chunk,
+        MAX_LENGTH
+    );
+    assert_eq!("", chunk);
+
+    let chunk = codec.decode(buf).unwrap().unwrap();
+    assert!(
+        chunk.len() <= MAX_LENGTH,
+        "{:?}.len() <= {:?}",
+        chunk,
+        MAX_LENGTH
+    );
+    assert_eq!("", chunk);
+
+    assert_eq!(None, codec.decode(buf).unwrap());
+    assert_eq!(None, codec.decode_eof(buf).unwrap());
+    buf.put_slice(b"k");
+    assert_eq!(None, codec.decode(buf).unwrap());
+
+    let chunk = codec.decode_eof(buf).unwrap().unwrap();
+    assert!(
+        chunk.len() <= MAX_LENGTH,
+        "{:?}.len() <= {:?}",
+        chunk,
+        MAX_LENGTH
+    );
+    assert_eq!("k", chunk);
+
+    assert_eq!(None, codec.decode(buf).unwrap());
+    assert_eq!(None, codec.decode_eof(buf).unwrap());
+
+    // Delimiter that's one character too long. This could cause an out of bounds
+    // error if we peek at the next characters using slice indexing.
+    buf.put_slice(b"aaabbbcc");
+    assert!(codec.decode(buf).is_err());
+}
+
+#[test]
+fn any_delimiter_decoder_max_length_underrun() {
+    const MAX_LENGTH: usize = 7;
+
+    let mut codec =
+        AnyDelimiterCodec::new_with_max_length(b",;\n\r".to_vec(), b",".to_vec(), MAX_LENGTH);
+    let buf = &mut BytesMut::new();
+
+    buf.reserve(200);
+    buf.put_slice(b"chunk ");
+    assert_eq!(None, codec.decode(buf).unwrap());
+    buf.put_slice(b"too l");
+    assert!(codec.decode(buf).is_err());
+    buf.put_slice(b"ong\n");
+    assert_eq!(None, codec.decode(buf).unwrap());
+
+    buf.put_slice(b"chunk 2");
+    assert_eq!(None, codec.decode(buf).unwrap());
+    buf.put_slice(b",");
+    assert_eq!("chunk 2", codec.decode(buf).unwrap().unwrap());
+}
+
+#[test]
+fn any_delimiter_decoder_max_length_underrun_twice() {
+    const MAX_LENGTH: usize = 11;
+
+    let mut codec =
+        AnyDelimiterCodec::new_with_max_length(b",;\n\r".to_vec(), b",".to_vec(), MAX_LENGTH);
+    let buf = &mut BytesMut::new();
+
+    buf.reserve(200);
+    buf.put_slice(b"chunk ");
+    assert_eq!(None, codec.decode(buf).unwrap());
+    buf.put_slice(b"too very l");
+    assert!(codec.decode(buf).is_err());
+    buf.put_slice(b"aaaaaaaaaaaaaaaaaaaaaaa");
+    assert_eq!(None, codec.decode(buf).unwrap());
+    buf.put_slice(b"ong\nshort\n");
+    assert_eq!("short", codec.decode(buf).unwrap().unwrap());
+}
+#[test]
+fn any_delimiter_decoder_max_length_bursts() {
+    const MAX_LENGTH: usize = 11;
+
+    let mut codec =
+        AnyDelimiterCodec::new_with_max_length(b",;\n\r".to_vec(), b",".to_vec(), MAX_LENGTH);
+    let buf = &mut BytesMut::new();
+
+    buf.reserve(200);
+    buf.put_slice(b"chunk ");
+    assert_eq!(None, codec.decode(buf).unwrap());
+    buf.put_slice(b"too l");
+    assert_eq!(None, codec.decode(buf).unwrap());
+    buf.put_slice(b"ong\n");
+    assert!(codec.decode(buf).is_err());
+}
+
+#[test]
+fn any_delimiter_decoder_max_length_big_burst() {
+    const MAX_LENGTH: usize = 11;
+
+    let mut codec =
+        AnyDelimiterCodec::new_with_max_length(b",;\n\r".to_vec(), b",".to_vec(), MAX_LENGTH);
+    let buf = &mut BytesMut::new();
+
+    buf.reserve(200);
+    buf.put_slice(b"chunk ");
+    assert_eq!(None, codec.decode(buf).unwrap());
+    buf.put_slice(b"too long!\n");
+    assert!(codec.decode(buf).is_err());
+}
+
+#[test]
+fn any_delimiter_decoder_max_length_delimiter_between_decodes() {
+    const MAX_LENGTH: usize = 5;
+
+    let mut codec =
+        AnyDelimiterCodec::new_with_max_length(b",;\n\r".to_vec(), b",".to_vec(), MAX_LENGTH);
+    let buf = &mut BytesMut::new();
+
+    buf.reserve(200);
+    buf.put_slice(b"hello");
+    assert_eq!(None, codec.decode(buf).unwrap());
+
+    buf.put_slice(b",world");
+    assert_eq!("hello", codec.decode(buf).unwrap().unwrap());
+}
+
+#[test]
+fn any_delimiter_decoder_discard_repeat() {
+    const MAX_LENGTH: usize = 1;
+
+    let mut codec =
+        AnyDelimiterCodec::new_with_max_length(b",;\n\r".to_vec(), b",".to_vec(), MAX_LENGTH);
+    let buf = &mut BytesMut::new();
+
+    buf.reserve(200);
+    buf.put_slice(b"aa");
+    assert!(codec.decode(buf).is_err());
+    buf.put_slice(b"a");
+    assert_eq!(None, codec.decode(buf).unwrap());
+}
+
+#[test]
+fn any_delimiter_encoder() {
+    let mut codec = AnyDelimiterCodec::new(b",".to_vec(), b";--;".to_vec());
+    let mut buf = BytesMut::new();
+
+    codec.encode("chunk 1", &mut buf).unwrap();
+    assert_eq!("chunk 1;--;", buf);
+
+    codec.encode("chunk 2", &mut buf).unwrap();
+    assert_eq!("chunk 1;--;chunk 2;--;", buf);
+}