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# TODO(jayconrod): support shared memory on more platforms.
[!darwin] [!linux] [!windows] skip
[short] skip
# There are no seed values, so 'go test' should finish quickly.
go test
# Fuzzing should exit 0 after fuzztime, even if timeout is short.
go test -timeout=10ms -fuzz=FuzzFast -fuzztime=5s
# We should see the same behavior when invoking the test binary directly.
go test -c
exec ./fuzz.test$GOEXE -test.timeout=10ms -test.fuzz=FuzzFast -test.fuzztime=5s -test.parallel=1 -test.fuzzcachedir=$WORK/cache
# Timeout should not cause inputs to be written as crashers.
! exists testdata/fuzz
# When we use fuzztime with an "x" suffix, it runs a specific number of times.
# This fuzz function creates a file with a unique name ($pid.$count) on each run.
# We count the files to find the number of runs.
mkdir count
env GOCACHE=$WORK/tmp
go test -fuzz=FuzzCount -fuzztime=1000x -fuzzminimizetime=1x
go run check_file_count.go 1000
-- go.mod --
module fuzz
go 1.16
-- fuzz_fast_test.go --
package fuzz_test
import "testing"
func FuzzFast(f *testing.F) {
f.Fuzz(func (*testing.T, []byte) {})
}
-- fuzz_count_test.go --
package fuzz
import (
"fmt"
"os"
"testing"
)
func FuzzCount(f *testing.F) {
pid := os.Getpid()
n := 0
f.Fuzz(func(t *testing.T, _ []byte) {
name := fmt.Sprintf("count/%v.%d", pid, n)
if err := os.WriteFile(name, nil, 0666); err != nil {
t.Fatal(err)
}
n++
})
}
-- check_file_count.go --
// +build ignore
package main
import (
"fmt"
"os"
"strconv"
)
func main() {
dir, err := os.ReadDir("count")
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
got := len(dir)
want, _ := strconv.Atoi(os.Args[1])
if got != want {
fmt.Fprintf(os.Stderr, "got %d files; want %d\n", got, want)
os.Exit(1)
}
}
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