script/go-test-fuzz.sh
#!/usr/bin/env bash

#   Copyright The containerd Authors.

#   Licensed under the Apache License, Version 2.0 (the "License");
#   you may not use this file except in compliance with the License.
#   You may obtain a copy of the License at

#       http://www.apache.org/licenses/LICENSE-2.0

#   Unless required by applicable law or agreed to in writing, software
#   distributed under the License is distributed on an "AS IS" BASIS,
#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#   See the License for the specific language governing permissions and
#   limitations under the License.

# Running Go 1.18's fuzzing for 30 seconds each. While this would be too
# short to actually find issues, we want to make sure that these fuzzing
# tests are not fundamentally broken.

set -euo pipefail
set -x

fuzztime=30s
# keep the filename and Fuzz function name so we can run every fuzz test
# in a package separately (`go test -fuzz` only supports single fuzz function)
pkgs=$(git grep 'func Fuzz.*testing\.F' | grep -o '.*testing\.F)' | grep -v -E "vendor" | sort | uniq)

IFS=$'\n'
for pkg in $pkgs
do
    pkg_path=$(echo $pkg | grep -o '.*/')
    fuzz_name=$(echo $pkg | grep -o 'Fuzz[^(]*')
    go test -fuzz=$fuzz_name ./$pkg_path -fuzztime=$fuzztime
done