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testing: allow go test -run=^$ testing

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This should fix the ssacheck builder.

Change-Id: I4b6172df33d6447f7ec8fd8e301c6380efb92588
Reviewed-on: https://go-review.googlesource.com/c/go/+/431336
Auto-Submit: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: David Chase <drchase@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
This commit is contained in:
Russ Cox 2022-09-16 12:05:57 -04:00 committed by Gopher Robot
parent 0a1118b8a1
commit 1fc83690e6
1 changed files with 2 additions and 1 deletions
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3
src/testing/testing.go
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@ -1766,12 +1766,13 @@ func (m *M) Run() (code int) {
m.stopAlarm()
if !testRan && !exampleRan && !fuzzTargetsRan && *matchBenchmarks == "" && *matchFuzz == "" {
fmt.Fprintln(os.Stderr, "testing: warning: no tests to run")
if testingTesting {
if testingTesting && *match != "^$" {
// If this happens during testing of package testing it could be that
// package testing's own logic for when to run a test is broken,
// in which case every test will run nothing and succeed,
// with no obvious way to detect this problem (since no tests are running).
// So make 'no tests to run' a hard failure when testing package testing itself.
// The compile-only builders use -run=^$ to run no tests, so allow that.
fmt.Println("FAIL: package testing must run tests")
testOk = false
}