test: add CI, RingBuffer tests, core proptest, RAII lua fixtures

crates/pipeview-core/tests/properties.rs

@@ -0,0 +1,96 @@
+use proptest::prelude::*;
+
+use pipeview_core::frame::Framer;
+use pipeview_core::frame::cobs::{CobsFramer, cobs_decode, cobs_encode};
+use pipeview_core::frame::length::{LengthConfig, LengthPrefixedFramer};
+use pipeview_core::protocol::Endian;
+use pipeview_core::protocol::ProtocolDecoder;
+use pipeview_core::protocol::hex::{HexConfig, HexDecoder};
+use pipeview_core::protocol::plot::{PlotConfig, PlotDecoder, SampleType};
+use pipeview_core::protocol::text::{TextDecoder, TextEncoding};
+
+proptest! {
+    #![proptest_config(ProptestConfig::with_cases(256))]
+
+    // ── COBS ─────────────────────────────────────────────────────────
+
+    #[test]
+    fn cobs_roundtrip_any_payload(payload in prop::collection::vec(any::<u8>(), 0..512)) {
+        let encoded = cobs_encode(&payload);
+        let decoded = cobs_decode(&encoded).unwrap();
+        prop_assert_eq!(&decoded, &payload);
+
+        let mut framer = CobsFramer::new(1024 * 1024);
+        let mut wire = encoded;
+        wire.push(0x00);
+        let frames = framer.feed(&wire);
+        prop_assert_eq!(frames.len(), 1);
+        prop_assert_eq!(&frames[0], &payload);
+    }
+
+    // ── Length-prefixed ──────────────────────────────────────────────
+
+    #[test]
+    fn length_roundtrip_any_payload(
+        len_bytes in prop_oneof![Just(1usize), Just(2usize), Just(4usize)],
+        little_endian in any::<bool>(),
+        includes_self in any::<bool>(),
+        payload in prop::collection::vec(any::<u8>(), 0..200)
+    ) {
+        let endian = if little_endian { Endian::Little } else { Endian::Big };
+        let raw_len = if includes_self {
+            payload.len() + len_bytes
+        } else {
+            payload.len()
+        };
+
+        let mut wire = Vec::with_capacity(len_bytes + payload.len());
+        match (len_bytes, endian) {
+            (1, _) => wire.push(raw_len as u8),
+            (2, Endian::Big) => wire.extend_from_slice(&(raw_len as u16).to_be_bytes()),
+            (2, Endian::Little) => wire.extend_from_slice(&(raw_len as u16).to_le_bytes()),
+            (4, Endian::Big) => wire.extend_from_slice(&(raw_len as u32).to_be_bytes()),
+            (4, Endian::Little) => wire.extend_from_slice(&(raw_len as u32).to_le_bytes()),
+            _ => unreachable!(),
+        }
+        wire.extend_from_slice(&payload);
+
+        let config = LengthConfig {
+            len_bytes,
+            endian,
+            length_includes_self: includes_self,
+            max_payload: 1024 * 1024,
+        };
+        let mut framer = LengthPrefixedFramer::new(config);
+        let frames = framer.feed(&wire);
+        prop_assert_eq!(frames.len(), 1);
+        prop_assert_eq!(&frames[0], &payload);
+    }
+
+    // ── Protocol decoders never panic on arbitrary bytes ─────────────
+
+    #[test]
+    fn plot_decode_arbitrary_bytes_never_panics(bytes in prop::collection::vec(any::<u8>(), 0..256)) {
+        let decoder = PlotDecoder::new(PlotConfig {
+            sample_type: SampleType::F32,
+            endian: Endian::Little,
+            channels: 2,
+            format: pipeview_core::protocol::plot::PlotFormat::Interleaved,
+        });
+        let _ = decoder.decode(&bytes);
+    }
+
+    #[test]
+    fn hex_decode_arbitrary_bytes_never_panics(bytes in prop::collection::vec(any::<u8>(), 0..256)) {
+        let decoder = HexDecoder::new(HexConfig::default());
+        let decoded = decoder.decode(&bytes);
+        prop_assert!(decoded.is_some());
+    }
+
+    #[test]
+    fn latin1_decode_arbitrary_bytes_never_panics(bytes in prop::collection::vec(any::<u8>(), 0..256)) {
+        let decoder = TextDecoder::new(TextEncoding::Latin1);
+        let decoded = decoder.decode(&bytes);
+        prop_assert!(decoded.is_some());
+    }
+}