| commit | 478bde3a4388997924a02ee9296864866d8ba3ba | [log] [tgz] |
|---|---|---|
| author | Russ Cox <rsc@golang.org> | Wed Dec 02 12:49:20 2020 -0500 |
| committer | Russ Cox <rsc@golang.org> | Fri Dec 04 16:49:30 2020 +0000 |
| tree | f474d0ffa817826e9d07f79a0df463da23060a32 | |
| parent | 5d4569197eeef42862b8ea87a7e8ccda1cd061a0 [diff] |
io/fs: add Sub Sub provides a convenient way to refer to a subdirectory automatically in future operations, like Unix's chdir(2). The CL also includes updates to fstest to check Sub implementations. As part of updating fstest, I changed the meaning of TestFS's expected list to introduce a special case: if you list no expected files, that means the FS must be empty. In general it's OK not to list all the expected files, but if you list none, that's almost certainly a mistake - if your FS were broken and empty, you wouldn't find out. Making no expected files mean "must be empty" makes the mistake less likely - if your file system ever worked, then your test will keep it working. That change found a testing bug: embedtest was making exactly that mistake. Fixes #42322. Change-Id: I63fd4aa866b30061a0e51ca9a1927e576d6ec41e Reviewed-on: https://go-review.googlesource.com/c/go/+/274856 Trust: Russ Cox <rsc@golang.org> Run-TryBot: Russ Cox <rsc@golang.org> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org>
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