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[dev.fuzz] testing: allow -fuzzminimizetime to be 0

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Fixes golang/go#48321

Change-Id: I1547379eb7a703f7f3c4594d27833eb3587796a0
Reviewed-on: https://go-review.googlesource.com/c/go/+/349089
Trust: Katie Hockman <katie@golang.org>
Run-TryBot: Katie Hockman <katie@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
This commit is contained in:
Katie Hockman 2021-09-10 13:16:32 -04:00
parent b38e853d04
commit 363f2f3df9
3 changed files with 32 additions and 5 deletions
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26
src/cmd/go/testdata/script/test_fuzz_minimize.txt vendored
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@ -6,6 +6,32 @@
# We clean the fuzz cache during this test. Don't clean the user's cache. # We clean the fuzz cache during this test. Don't clean the user's cache.
env GOCACHE=$WORK/gocache env GOCACHE=$WORK/gocache
# Test that fuzzminimizetime can be zero seconds
! go test -fuzz=FuzzMinimizerRecoverable -run=FuzzMinimizerRecoverable -fuzztime=10000x -fuzzminimizetime=0s minimizer_test.go
! stdout '^ok'
stdout 'contains a non-zero byte'
stdout FAIL
# Test that fuzzminimizetime can be zero times
! go test -fuzz=FuzzMinimizerRecoverable -run=FuzzMinimizerRecoverable -fuzztime=10000x -fuzzminimizetime=0x minimizer_test.go
! stdout '^ok'
stdout 'contains a non-zero byte'
stdout FAIL
# Test that fuzzminimizetime cannot be negative seconds
! go test -fuzz=FuzzMinimizerRecoverable -run=FuzzMinimizerRecoverable -fuzztime=10000x -fuzzminimizetime=-1ms minimizer_test.go
! stdout '^ok'
! stdout 'contains a non-zero byte'
stdout 'invalid duration'
stdout FAIL
# Test that fuzzminimizetime cannot be negative times
! go test -fuzz=FuzzMinimizerRecoverable -run=FuzzMinimizerRecoverable -fuzztime=10000x -fuzzminimizetime=-1x minimizer_test.go
! stdout '^ok'
! stdout 'contains a non-zero byte'
stdout 'invalid count'
stdout FAIL
# Test that minimization is working for recoverable errors. # Test that minimization is working for recoverable errors.
! go test -fuzz=FuzzMinimizerRecoverable -run=FuzzMinimizerRecoverable -fuzztime=10000x minimizer_test.go ! go test -fuzz=FuzzMinimizerRecoverable -run=FuzzMinimizerRecoverable -fuzztime=10000x minimizer_test.go
! stdout '^ok' ! stdout '^ok'

5
src/testing/benchmark.go
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@ -38,6 +38,7 @@ var (
type durationOrCountFlag struct { type durationOrCountFlag struct {
d time.Duration d time.Duration
n int n int
allowZero bool
} }
func (f *durationOrCountFlag) String() string { func (f *durationOrCountFlag) String() string {
@ -50,14 +51,14 @@ func (f *durationOrCountFlag) String() string {
func (f *durationOrCountFlag) Set(s string) error { func (f *durationOrCountFlag) Set(s string) error {
if strings.HasSuffix(s, "x") { if strings.HasSuffix(s, "x") {
n, err := strconv.ParseInt(s[:len(s)-1], 10, 0) n, err := strconv.ParseInt(s[:len(s)-1], 10, 0)
if err != nil || n <= 0 { if err != nil || n < 0 || (!f.allowZero && n == 0) {
return fmt.Errorf("invalid count") return fmt.Errorf("invalid count")
} }
*f = durationOrCountFlag{n: int(n)} *f = durationOrCountFlag{n: int(n)}
return nil return nil
} }
d, err := time.ParseDuration(s) d, err := time.ParseDuration(s)
if err != nil || d <= 0 { if err != nil || d < 0 || (!f.allowZero && d == 0) {
return fmt.Errorf("invalid duration") return fmt.Errorf("invalid duration")
} }
*f = durationOrCountFlag{d: d} *f = durationOrCountFlag{d: d}

2
src/testing/fuzz.go
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@ -28,7 +28,7 @@ func initFuzzFlags() {
var ( var (
matchFuzz *string matchFuzz *string
fuzzDuration durationOrCountFlag fuzzDuration durationOrCountFlag
minimizeDuration = durationOrCountFlag{d: 60 * time.Second} minimizeDuration = durationOrCountFlag{d: 60 * time.Second, allowZero: true}
fuzzCacheDir *string fuzzCacheDir *string
isFuzzWorker *bool isFuzzWorker *bool