cmd/go/internal/test: pass default timeout to test programs if not given from command line

[okamotoyuki]

Make 'go test' command to pass the default timeout (10m) to test programs if the value is not given from command line.

Fixes #28147

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Message from Bryan C. Mills:

Patch Set 1:

(2 comments)

Thanks for the fix! A couple of minor comments.

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Message from Yuki Okamoto:

Patch Set 2:

(2 comments)

Patch Set 1:

(2 comments)

Thanks for the fix! A couple of minor comments.

Thanks for your prompt review!
I just updated the pull request based on your review.

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Message from Emmanuel Odeke:

Patch Set 2: Run-TryBot+1 Code-Review+1

Nice, thank you Yuki!

Bryan I am just running the tests, merging all yours.

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Message from Yuki Okamoto:

Patch Set 2:

Patch Set 1:

(2 comments)

Thanks for the fix! A couple of minor comments.

Hi Bryan!

I applied the fixes but it seemed to break a few tests on some platforms unfortunately.

Let me confirm if my understanding is correct.

'testKillTimeout' is just a backup alarm as described in the following comment.

• https://github.com/golang/go/blob/master/src/cmd/go/internal/test/test.go#L551

Then, 'dt' itself in the following code (which is originally specified with '-timeout' option) should be passed to test programs as 'test.timeout' flag, right?

• https://github.com/golang/go/blob/master/src/cmd/go/internal/test/test.go#L554

Cheers,
Yuki

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Patch Set 3: Run-TryBot+1 Code-Review+2

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Patch Set 4: Patch Set 3 was rebased

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This PR is being closed because golang.org/cl/164963 has been merged.