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compress/flate: fix test

The test was checking for a buffer to be empty but
actually racing with the background goroutine that
was emptying it.  Left a comment so that the check
is not reintroduced later.

Fixes #1557.

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/4248063
This commit is contained in:
Russ Cox 2011-03-05 14:35:03 -05:00
parent 1169559658
commit d044674a0d

View File

@ -191,9 +191,16 @@ func testSync(t *testing.T, level int, input []byte, name string) {
t.Errorf("testSync/%d: read wrong bytes: %x vs %x", i, input[lo:hi], out[:hi-lo])
return
}
if i == 0 && buf.buf.Len() != 0 {
t.Errorf("testSync/%d (%d, %d, %s): extra data after %d", i, level, len(input), name, hi-lo)
}
// This test originally checked that after reading
// the first half of the input, there was nothing left
// in the read buffer (buf.buf.Len() != 0) but that is
// not necessarily the case: the write Flush may emit
// some extra framing bits that are not necessary
// to process to obtain the first half of the uncompressed
// data. The test ran correctly most of the time, because
// the background goroutine had usually read even
// those extra bits by now, but it's not a useful thing to
// check.
buf.WriteMode()
}
buf.ReadMode()