Trace tests, don't re-allocate vec u8 all the time

crates/rc-zip/Cargo.toml

@@ -35,3 +35,6 @@ sync = []
 file = ["positioned-io"]
 deflate = ["flate2"]
 lzma = ["lzma-rs"]
+
+[dev-dependencies]
+tracing-test = "0.2.4"

crates/rc-zip/src/reader/sync/entry_reader/lzma_dec.rs

@@ -79,8 +79,9 @@ where
             dst_slice.copy_from_slice(src_slice);
         }
 
-        // TODO: use a ring buffer instead
-        *write_buf = write_buf.split_off(write_count);
+        // copy the remaining bytes to the front of the buffer
+        write_buf.rotate_left(write_count);
+        write_buf.truncate(write_buf.len() - write_count);
 
         self.total_write_count += write_count as u64;
         Ok(write_count)

crates/rc-zip/src/tests.rs

@@ -1,3 +1,5 @@
+use tracing_test::traced_test;
+
 use crate::{
     reader::sync::{HasCursor, SyncArchive, SyncStoredEntry},
     Archive,
@@ -286,6 +288,7 @@ fn test_cases() -> Vec<ZipTest> {
 }
 
 #[test]
+#[traced_test]
 fn read_from_slice() {
     let bytes = std::fs::read(zips_dir().join("test.zip")).unwrap();
     let slice = &bytes[..];
@@ -294,20 +297,23 @@ fn read_from_slice() {
 }
 
 #[test]
+#[traced_test]
 fn read_from_file() {
     let f = File::open(zips_dir().join("test.zip")).unwrap();
     let archive = f.read_zip().unwrap();
     assert_eq!(archive.entries().count(), 2);
 }
 
 #[test]
+#[traced_test]
 fn real_world_files() {
     for case in test_cases() {
         case.check(case.bytes().read_zip());
     }
 }
 
 #[test]
+#[traced_test]
 fn test_fsm() {
     use super::reader::{ArchiveReader, ArchiveReaderResult};