The misc/cgo/life and misc/cgo/stdio tests started out as fairly simple
test cases when they were added, but the machinery to execute them has
grown in complexity over the years.

They currently reuse the test/run.go runner and its "run" action without
needing much of the additional flexibility that said runner implements.
Given that runner isn't well documented, it makes it harder to see that
ultimately these tests just do 'go run' on a few test programs and check
that the output matches a golden file.

Maybe these test cases should move out of misc to be near similar tests,
or the machinery to execute them can made available in a package that is
easier and safer to reuse. I'd rather not block the refactor of the test
directory runner on that, so for now rewrite these to be self-contained.

Also delete misc/cgo/stdio/testdata/run.out which has no effect on the
test. It was seemingly accidentally kept behind during the refactor in
CL 6220049.

For #56844.

Change-Id: I5e2f542824925092cdddb03b44b6295a4136ccb4
Reviewed-on: https://go-review.googlesource.com/c/go/+/465755
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Austin Clements <austin@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>

Now that the bare minimum change to make the run.go test runner into
a normal go test is done, there remain many opportunities to simplify,
modernize and generally clean up the test code.

Of all the opportunities available, this change tries to fit somewhere
between doing "not enough" and "way too much". This ends up including:

• replace verbose flag with testing.Verbose()
• replace custom temporary directory creation, removal, -keep flag
  with testing.T.TempDir
• replace custom code to find the go command with testenv.GoToolPath
• replace many instances of "t.err = err; return" with "return err",
  or with t.Fatal when it's clearly a test infrastructure error
• replace reliance on changing working directory to GOROOT/test to
  computing and using absolute paths
• replace uses of log.Fatal with t.Fatal
• replace uses of deprecated ioutil package with their replacements
• add some missing error checks, use more idiomatic identifier names

For #56844.

Change-Id: I5b301bb83a8e5b64cf211d7f2f4b14d38d48fea0
Reviewed-on: https://go-review.googlesource.com/c/go/+/466155
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>

The top-level test suite in $GOROOT/test is implemented as a normal
go test in the new internal/testenv package as of CL 463276. Update
the contribution guide accordingly.

Updates golang/go#56844.

Change-Id: I73bfa8e4fc7c35f63efdde42ddf3552b5a518136
Reviewed-on: https://go-review.googlesource.com/c/website/+/471895
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It's changed slightly to be inside 'cmd'.

For golang/go#56844.
For golang/go#60059.

Change-Id: I244f0ae627978a7b59d6a56d20aebc3ff81b3179
Reviewed-on: https://go-review.googlesource.com/c/website/+/493915
Reviewed-by: Bryan Mills <bcmills@google.com>
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Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>

The effect and motivation is for the test to be selected when doing
'go test cmd' and not when doing 'go test std' since it's primarily
about testing the Go compiler and linker. Other than that, it's run
by all.bash and 'go test std cmd' as before.

For #56844.
Fixes #60059.

Change-Id: I2d499af013f9d9b8761fdf4573f8d27d80c1fccf
Reviewed-on: https://go-review.googlesource.com/c/go/+/493876
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
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Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>

It was my oversight in CL 463276 to skip registerStdTestSpecially
packages in the race bench test registration loop. Package testdir
has no benchmarks and doesn't need to be skipped. (And if it had
benchmarks, it's very unlikely they'd need any special handling.)

By now there are more cmd/cgo/internal/... packages that are registered
specially, and there isn't a need for their few benchmarks not to be
used for the purpose of race bench tests. If the 3 benchmarks in
cmd/cgo/internal/test were to require something special, then we can
add it to a new registerRaceBenchTestSpecially map with a comment, and
do register them specially in registerTests instead of forgetting to.

This restores the automatic 'go_test_bench:cmd/cgo/internal/test'
registration and reduces prevalence of registerStdTestSpecially a bit.

For #37486.
For #56844.

Change-Id: I1791fe5bf94cb4b4e0859c5fff4e7a3d5a23723e
Reviewed-on: https://go-review.googlesource.com/c/go/+/494656
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>

The go command already places $GOROOT/bin at the beginning of $PATH in
the test's environment as of Go 1.19¹, so there's no need for the test
to do it anymore. Start enjoying yet another benefit of using 'go test'.

¹ See go.dev/issue/57050.

For #56844.

Change-Id: If7732cd8b8979eabf185485d3c73858a4e546d69
Reviewed-on: https://go-review.googlesource.com/c/go/+/498271
Reviewed-by: Bryan Mills <bcmills@google.com>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
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The go command already places $GOROOT/bin at the beginning of $PATH in
the test's environment as of Go 1.19¹, so there's no need for the test
to do it anymore. Start enjoying yet another benefit of using 'go test'.

¹ See go.dev/issue/57050.

For golang#56844.

Change-Id: If7732cd8b8979eabf185485d3c73858a4e546d69
Reviewed-on: https://go-review.googlesource.com/c/go/+/498271
Reviewed-by: Bryan Mills <bcmills@google.com>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>