66 lines
1.8 KiB
Rust
66 lines
1.8 KiB
Rust
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use std::{env, fs};
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use weezl::{decode, encode, BitOrder};
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#[derive(Clone, Copy, Debug)]
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enum Flavor {
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Gif,
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Tiff,
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}
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#[test]
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fn roundtrip_all() {
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let file = env::args().next().unwrap();
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let data = fs::read(file).unwrap();
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for &flavor in &[Flavor::Gif, Flavor::Tiff] {
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for &bit_order in &[BitOrder::Lsb, BitOrder::Msb] {
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for bit_width in 2..8 {
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let data: Vec<_> = data
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.iter()
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.copied()
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.map(|b| b & ((1 << bit_width) - 1))
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.collect();
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println!("Roundtrip test {:?} {:?} {}", flavor, bit_order, bit_width);
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assert_roundtrips(&*data, flavor, bit_width, bit_order);
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}
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}
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}
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}
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fn assert_roundtrips(data: &[u8], flavor: Flavor, bit_width: u8, bit_order: BitOrder) {
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let (c, d): (
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fn(BitOrder, u8) -> encode::Encoder,
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fn(BitOrder, u8) -> decode::Decoder,
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) = match flavor {
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Flavor::Gif => (encode::Encoder::new, decode::Decoder::new),
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Flavor::Tiff => (
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encode::Encoder::with_tiff_size_switch,
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decode::Decoder::with_tiff_size_switch,
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),
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};
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let mut encoder = c(bit_order, bit_width);
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let mut buffer = Vec::with_capacity(2 * data.len() + 40);
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let _ = encoder.into_vec(&mut buffer).encode_all(data);
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let mut decoder = d(bit_order, bit_width);
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let mut compare = vec![];
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let result = decoder.into_vec(&mut compare).decode_all(buffer.as_slice());
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assert!(
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result.status.is_ok(),
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"{:?}, {}, {:?}",
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bit_order,
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bit_width,
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result.status
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);
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assert!(
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data == &*compare,
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"{:?}, {}\n{:?}\n{:?}",
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bit_order,
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bit_width,
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data,
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compare
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);
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}
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