! go test -fuzz=FuzzMinimizerRecoverable -run=FuzzMinimizerRecoverable -fuzztime=10000x -fuzzminimizetime=-1ms .
! 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 .
! stdout '^ok'
! stdout 'contains a non-zero byte'

# corpus, and the total size of the cache is now 1.
go clean -fuzzcache
go test -fuzz=FuzzEmpty -fuzztime=10000x .
stdout 'new interesting: 1'
stdout 'total: 1'

# Fuzzing again with a small fuzztime does not find any other interesting
# values but still indicates that the cache size is 1.
go test -fuzz=FuzzEmpty -fuzztime=2x .
stdout 'new interesting: 0'
stdout 'total: 1'

! go clean -fuzzcache example.com/y

stdout 'this input caused a crash!'

! go test -run=FuzzWithNilPanic -fuzz=FuzzWithNilPanic -fuzztime=100x -fuzzminimizetime=1000x
stdout 'testdata[/\\]fuzz[/\\]FuzzWithNilPanic[/\\]'
stdout 'panic called with nil argument|test executed panic.nil. or runtime.Goexit'
go run check_testdata.go FuzzWithNilPanic

! go test -run=FuzzWithGoexit -fuzz=FuzzWithGoexit -fuzztime=100x -fuzzminimizetime=1000x
stdout 'testdata[/\\]fuzz[/\\]FuzzWithGoexit[/\\]'

# and doesn't write anything to testdata/fuzz
! go test -fuzz=FuzzWithAdd -run=FuzzWithAdd -fuzztime=1x
! stdout ^ok
! stdout 'Failing input written to testdata[/\\]fuzz[/\\]FuzzWithAdd[/\\]'
stdout FAIL

# Test that fuzzing a target with a success in f.Add and a fuzztime of only
# 1 does not produce a crash.
go test -fuzz=FuzzWithGoodAdd -run=FuzzWithGoodAdd -fuzztime=1x
stdout ok
! stdout FAIL

! stdout '^ok.*\[no tests to run\]'
stdout '^ok'

# Matches only for fuzzing.
go test -fuzz Fuzz -fuzztime 1x standalone_fuzz_test.go
! stdout '^ok.*\[no tests to run\]'
stdout '^ok'

# Matches none for fuzzing but will run the fuzz target as a test.
go test -fuzz ThisWillNotMatch -fuzztime 1x standalone_fuzz_test.go
! stdout '^ok.*no tests to run'
stdout '^ok'
stdout 'no fuzz tests to fuzz'

[short] stop

# address space (see https://go.dev/issue/65434).
env GOMAXPROCS=2

# Fuzzing should exit 0 after fuzztime, even if timeout is short.
go test -timeout=3s -fuzz=FuzzFast -fuzztime=5s

# We should see the same behavior when invoking the test binary directly.
go test -c
exec ./fuzz.test$GOEXE -test.timeout=3s -test.fuzz=FuzzFast -test.fuzztime=5s -test.parallel=1 -test.fuzzcachedir=$WORK/cache

# there is no timeout while fuzzing, even if -fuzztime is set.
go test -run=FuzzDeadline -wantdeadline=true # -timeout defaults to 10m
go test -run=FuzzDeadline -timeout=0 -wantdeadline=false
! go test -run=FuzzDeadline -timeout=1s -wantdeadline=false
go test -run=FuzzDeadline -timeout=1s -wantdeadline=true
go test -fuzz=FuzzDeadline -timeout=0 -fuzztime=1s -wantdeadline=false

! go test -fuzz=. ./zero ./one
stderr '^cannot use -fuzz flag with multiple packages$'
go test -fuzz=. -fuzztime=1x ./one

# With fuzzing enabled, at most one target in the same package may match.
! go test -fuzz=. ./two
stdout '^testing: will not fuzz, -fuzz matches more than one fuzz test: \[FuzzOne FuzzTwo\]$'
go test -fuzz=FuzzTwo -fuzztime=1x ./two

-- go.mod --
module fuzz

go 1.18
-- zero/zero.go --
package zero

go test -c -fuzz=.  # Build using shared build cache for speed.
env GOCACHE=$WORK/gocache
exec ./fuzz.test$GOEXE -test.fuzzcachedir=$GOCACHE/fuzz -test.fuzz=FuzzMinCache -test.fuzztime=1000x
go run check_cache/check_cache.go $GOCACHE/fuzz/FuzzMinCache

# Test that minimization occurs for a crash that appears while minimizing a
# newly found interesting input. There must be only one worker for this test to

[!fuzz] skip
[short] skip
env GOCACHE=$WORK/cache

go test -fuzz=FuzzA -fuzztime=100x fuzz_setenv_test.go

-- fuzz_setenv_test.go --
package fuzz

import (
  "flag"
  "os"
  "testing"
)

func FuzzA(f *testing.F) {
  if s := os.Getenv("TEST_FUZZ_SETENV_A"); isWorker() && s == "" {
    f.Fatal("environment variable not set")
  } else if !isWorker() && s != "" {
    f.Fatal("environment variable already set")
  }