Add FuzzHash

Author: bep

go.mod

@@ -1,3 +1,5 @@
 module github.com/gohugoio/hashstructure
 
 go 1.18
+
+require github.com/AdaLogics/go-fuzz-headers v0.0.0-20240806141605-e8a1dd7889d6 // indirect

go.sum

@@ -0,0 +1,2 @@
+github.com/AdaLogics/go-fuzz-headers v0.0.0-20240806141605-e8a1dd7889d6 h1:He8afgbRMd7mFxO99hRNu+6tazq8nFF9lIwo9JFroBk=
+github.com/AdaLogics/go-fuzz-headers v0.0.0-20240806141605-e8a1dd7889d6/go.mod h1:8o94RPi1/7XTJvwPpRSzSUedZrtlirdB3r9Z20bi2f8=

hashstructure_fuzz_test.go

@@ -0,0 +1,40 @@
+package hashstructure
+
+import (
+	"testing"
+	"time"
+
+	fuzz "github.com/AdaLogics/go-fuzz-headers"
+)
+
+func FuzzHash(f *testing.F) {
+	type Test struct {
+		Str         string
+		Int         int
+		In64        int64
+		Float64     float64
+		MapStr      map[string]string
+		MapStruct   map[string]Test
+		SliceStr    []string
+		SliceStrSet []string `hash:"set"`
+		SliceByte   []byte
+		StrPtr      *string
+		IntPtr      *int
+		Time        time.Time
+		Duration    time.Duration
+		UUID        string `hash:"ignore"`
+	}
+
+	f.Fuzz(func(t *testing.T, data []byte) {
+		fuzzConsumer := fuzz.NewConsumer(data)
+		targetStruct := &Test{}
+		err := fuzzConsumer.GenerateStruct(targetStruct)
+		if err != nil {
+			return
+		}
+		_, err = Hash(targetStruct, nil)
+		if err != nil {
+			t.Fatal(err)
+		}
+	})
+}