Fuzz filter package with Go 1.18's fuzzer

Signed-off-by: Kazuyoshi Kato <katokazu@amazon.com>

contrib/fuzz/filters_fuzzers.go

@@ -1,32 +0,0 @@
-//go:build gofuzz
-// +build gofuzz
-
-/*
-   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.
-*/
-
-package fuzz
-
-import (
-	"github.com/containerd/containerd/filters"
-)
-
-func FuzzFiltersParse(data []byte) int {
-	_, err := filters.Parse(string(data))
-	if err != nil {
-		return 0
-	}
-	return 1
-}

filters/filter_test.go

@@ -334,3 +334,13 @@ func TestOperatorStrings(t *testing.T) {
 		}
 	}
 }
+
+func FuzzFiltersParse(f *testing.F) {
+	f.Add("foo=bar")
+	f.Fuzz(func(t *testing.T, expr string) {
+		filter, err := Parse(expr)
+		if filter != nil && err != nil {
+			t.Fatal("either filter or err must be non-nil")
+		}
+	})
+}