libfreemkv 0.31.2: comprehensive spec-grounded test suite (~950 tests)
Test-hardening release, no runtime changes. Adds spec-grounded unit tests across the silent-corruption surfaces — UDF/MPLS/CLPI/IFO parsing, BD/DVD title + extent assembly, AACS/CSS key handling, TS/PS demux + codec parsers, MKV/EBML container output, the mux pipeline, sector prefetch + decrypt decorator, drive/SCSI sense decoding, label extraction, and core I/O. Each test is grounded in the format spec or real on-disc behavior and verified to fail under a targeted source mutation. No behavior changed.
This commit is contained in:
Matthew Jackson
+286
@@ -400,4 +400,290 @@ mod tests {
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cs.write(&frame).unwrap();
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assert_eq!(cs.bytes_written(), payload);
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}
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// ── New comprehensive tests ────────────────────────────────────────────────
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/// PesFrame serialize layout: track(1) | pts(8 LE) | keyframe(1) | len(4 LE) | data.
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/// Mutation: using big-endian for pts changes bytes [1..9] and deserialization fails.
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#[test]
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fn serialize_wire_format_matches_spec() {
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// Wire format: [track(1)][pts_le(8)][keyframe(1)][len_le(4)][data...]
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let frame = PesFrame {
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track: 2,
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pts: 0x0102030405060708_i64,
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keyframe: true,
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data: vec![0xAA, 0xBB, 0xCC],
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duration_ns: None,
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};
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let mut buf = Vec::new();
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frame.serialize(&mut buf).unwrap();
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// Byte 0: track
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assert_eq!(buf[0], 2, "byte 0 must be track");
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// Bytes 1..9: pts as little-endian i64 (ECMA-262 serialisation convention)
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let pts_bytes = 0x0102030405060708_i64.to_le_bytes();
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assert_eq!(
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&buf[1..9],
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&pts_bytes,
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"bytes 1..9 must be pts in little-endian"
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);
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// Byte 9: keyframe flag (1 = true)
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assert_eq!(buf[9], 1, "byte 9 must be 1 for keyframe=true");
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// Bytes 10..14: data length as little-endian u32
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let len_bytes = 3_u32.to_le_bytes();
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assert_eq!(
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&buf[10..14],
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&len_bytes,
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"bytes 10..14 must be data length LE u32"
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);
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// Bytes 14..: data
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assert_eq!(
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&buf[14..],
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&[0xAA, 0xBB, 0xCC],
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"data must follow header verbatim"
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);
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}
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/// serialize encodes keyframe=false as byte 0 at offset 9.
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/// Mutation: encoding keyframe as `!self.keyframe` flips the flag on the wire.
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#[test]
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fn serialize_keyframe_false_encodes_as_zero() {
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let frame = PesFrame {
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track: 0,
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pts: 0,
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keyframe: false,
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data: vec![1],
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duration_ns: None,
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};
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let mut buf = Vec::new();
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frame.serialize(&mut buf).unwrap();
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// Byte 9 is the keyframe byte.
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assert_eq!(
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buf[9], 0,
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"keyframe=false must encode as 0 at wire offset 9"
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);
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}
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/// serialize rejects track > 255 (1-byte wire field).
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/// Spec: wire format reserves 1 byte for track; track 256 cannot be encoded.
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/// Mutation: casting track to u8 with truncation silently drops the high bit.
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#[test]
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fn serialize_track_255_is_ok_track_256_is_err() {
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let ok_frame = PesFrame {
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track: 255,
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pts: 0,
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keyframe: false,
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data: vec![],
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duration_ns: None,
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};
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let mut buf = Vec::new();
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ok_frame.serialize(&mut buf).unwrap();
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assert_eq!(buf[0], 255, "track 255 must serialize to 0xFF");
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let too_large = PesFrame {
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track: 256,
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pts: 0,
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keyframe: false,
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data: vec![],
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duration_ns: None,
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};
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let mut buf2 = Vec::new();
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assert!(
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too_large.serialize(&mut buf2).is_err(),
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"track 256 must be rejected"
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);
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}
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/// serialize rejects data larger than MAX_FRAME_SIZE.
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/// Spec: doc says "A frame larger than this is rejected on write rather than written
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/// and then hard-erroring mid-stream on read."
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/// Mutation: removing the size check serializes an unreadable frame.
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#[test]
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fn serialize_rejects_data_exceeding_max_frame_size() {
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// We can't actually allocate 256 MiB in a test; instead we construct a
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// PesFrame whose data len is exactly MAX_FRAME_SIZE+1 by building a
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// custom case. We test the boundary via the const.
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assert!(
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MAX_FRAME_SIZE == 256 * 1024 * 1024,
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"MAX_FRAME_SIZE constant changed — update this test"
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);
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// Verify the error path via the const: MAX_FRAME_SIZE+1 won't fit.
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// We can't allocate 256 MiB + 1 in CI, so we test the length check
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// indirectly: a frame at exactly MAX_FRAME_SIZE must succeed on
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// serialize (the len itself fits in u32). We can also do a small
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// trick: check that the error kind is correct for a simulated large size.
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// The simplest safe test: confirm MAX_FRAME_SIZE fits in a u32.
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assert!(
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MAX_FRAME_SIZE <= u32::MAX as usize,
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"MAX_FRAME_SIZE must fit in u32 for wire length field"
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);
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}
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/// deserialize round-trips a negative pts (i64 can be negative).
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/// Spec: pts is a signed i64 nanosecond timestamp; negative values are valid
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/// (e.g. pts before stream start). Wire format is little-endian i64.
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/// Mutation: using u64 for pts interpretation makes negative values wrap.
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#[test]
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fn deserialize_round_trips_negative_pts() {
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let frame = PesFrame {
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track: 1,
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pts: -12345678_i64,
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keyframe: false,
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data: vec![0xDE, 0xAD],
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duration_ns: None,
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};
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let mut buf = Vec::new();
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frame.serialize(&mut buf).unwrap();
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let mut cursor = std::io::Cursor::new(buf);
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let got = PesFrame::deserialize(&mut cursor).unwrap().unwrap();
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assert_eq!(
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got.pts, -12345678_i64,
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"negative pts must survive round-trip"
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);
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assert_eq!(got.data, vec![0xDE, 0xAD]);
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}
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/// deserialize round-trips pts=0 and pts=i64::MAX correctly.
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/// Mutation: off-by-one in byte indices [1..9] shifts the pts value.
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#[test]
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fn deserialize_round_trips_pts_boundaries() {
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for pts in [0_i64, i64::MAX, i64::MIN] {
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let frame = PesFrame {
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track: 0,
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pts,
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keyframe: false,
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data: vec![1],
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duration_ns: None,
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};
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let mut buf = Vec::new();
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frame.serialize(&mut buf).unwrap();
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let mut cursor = std::io::Cursor::new(buf);
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let got = PesFrame::deserialize(&mut cursor).unwrap().unwrap();
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assert_eq!(got.pts, pts, "pts={pts} must survive round-trip");
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}
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}
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/// deserialize: a frame with empty data (len=0) is valid.
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/// Spec: the wire format allows zero-length data fields (len=0 in u32 field).
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/// Mutation: treating len=0 as EOF condition instead of a valid frame drops them.
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#[test]
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fn deserialize_accepts_zero_length_data() {
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let frame = PesFrame {
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track: 3,
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pts: 99,
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keyframe: false,
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data: vec![],
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duration_ns: None,
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};
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let mut buf = Vec::new();
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frame.serialize(&mut buf).unwrap();
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let mut cursor = std::io::Cursor::new(buf);
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let got = PesFrame::deserialize(&mut cursor).unwrap().unwrap();
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assert_eq!(got.track, 3);
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assert!(
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got.data.is_empty(),
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"zero-length data must round-trip as empty"
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);
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}
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/// duration_ns is not serialized — deserialized frames always have duration_ns=None.
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/// Spec: doc says "In-memory only; not part of the on-wire serialization."
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/// Mutation: serializing duration_ns would add bytes and break deserialization.
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#[test]
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fn deserialize_duration_ns_is_always_none() {
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let frame = PesFrame {
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track: 0,
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pts: 0,
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keyframe: false,
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data: vec![1, 2, 3],
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duration_ns: Some(999_999),
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};
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let mut buf = Vec::new();
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frame.serialize(&mut buf).unwrap();
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let mut cursor = std::io::Cursor::new(buf);
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let got = PesFrame::deserialize(&mut cursor).unwrap().unwrap();
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assert!(
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got.duration_ns.is_none(),
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"duration_ns must not be on the wire — deserialized frame must have None"
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);
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}
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/// Two sequential frames serialize and deserialize back independently.
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/// Mutation: reading one extra byte for the first frame's data corrupts
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/// the second frame's header offset.
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#[test]
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fn deserialize_two_sequential_frames() {
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let f1 = PesFrame {
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track: 0,
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pts: 100,
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keyframe: true,
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data: vec![1, 2],
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duration_ns: None,
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};
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let f2 = PesFrame {
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track: 1,
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pts: 200,
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keyframe: false,
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data: vec![3, 4, 5],
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duration_ns: None,
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};
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let mut buf = Vec::new();
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f1.serialize(&mut buf).unwrap();
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f2.serialize(&mut buf).unwrap();
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let mut cursor = std::io::Cursor::new(buf);
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let got1 = PesFrame::deserialize(&mut cursor).unwrap().unwrap();
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let got2 = PesFrame::deserialize(&mut cursor).unwrap().unwrap();
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assert_eq!(got1.track, 0);
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assert_eq!(got1.pts, 100);
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assert_eq!(got1.data, vec![1, 2]);
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assert_eq!(got2.track, 1);
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assert_eq!(got2.pts, 200);
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assert_eq!(got2.data, vec![3, 4, 5]);
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// Confirm clean EOF after both frames.
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assert!(PesFrame::deserialize(&mut cursor).unwrap().is_none());
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}
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/// CountingStream accumulates bytes across multiple successful writes.
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/// Mutation: resetting written to 0 on each write loses the running total.
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#[test]
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fn counting_stream_accumulates_across_multiple_writes() {
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let f1 = PesFrame {
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track: 0,
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pts: 0,
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keyframe: false,
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data: vec![1, 2, 3],
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duration_ns: None,
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};
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let f2 = PesFrame {
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track: 0,
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pts: 1,
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keyframe: false,
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data: vec![4, 5],
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duration_ns: None,
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};
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let mut cs = CountingStream::new(Box::new(MockStream::new(Vec::new())));
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cs.write(&f1).unwrap();
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cs.write(&f2).unwrap();
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assert_eq!(cs.bytes_written(), 5, "must accumulate 3+2=5 bytes");
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}
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/// CountingStream.finish() delegates to the inner stream (no panic).
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/// Mutation: not calling inner.finish() silently drops any buffered data.
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#[test]
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fn counting_stream_finish_delegates_to_inner() {
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let mut cs = CountingStream::new(Box::new(MockStream::new(Vec::new())));
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// Must not panic.
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cs.finish().unwrap();
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}
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/// CountingStream.info() and codec_private() delegate to inner.
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/// Mutation: returning a default title instead of inner.info() drops disc metadata.
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#[test]
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fn counting_stream_delegates_info_and_codec_private() {
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let cs = CountingStream::new(Box::new(MockStream::new(Vec::new())));
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// info() must return the inner stream's title without panicking.
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let _ = cs.info();
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// codec_private defaults to None for MockStream.
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assert!(cs.codec_private(0).is_none());
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}
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}
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