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update test to check Take limits after copying

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This commit is contained in:
The8472 2020-12-02 23:33:17 +01:00
parent af69066aa6
commit 9b390e73db
1 changed files with 9 additions and 2 deletions
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11
library/std/src/sys/unix/kernel_copy/tests.rs
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@ -42,8 +42,15 @@ fn copy_specialization() -> Result<()> {
assert_eq!(sink.buffer(), b"wxyz");
let copied = crate::io::copy(&mut source, &mut sink)?;
assert_eq!(copied, 10);
assert_eq!(sink.buffer().len(), 0);
assert_eq!(copied, 10, "copy obeyed limit imposed by Take");
assert_eq!(sink.buffer().len(), 0, "sink buffer was flushed");
assert_eq!(source.limit(), 0, "outer Take was exhausted");
assert_eq!(source.get_ref().buffer().len(), 0, "source buffer should be drained");
assert_eq!(
source.get_ref().get_ref().limit(),
1,
"inner Take allowed reading beyond end of file, some bytes should be left"
);
let mut sink = sink.into_inner()?;
sink.seek(SeekFrom::Start(0))?;