1 files changed, 102 insertions, 0 deletions
diff --git a/go/snowflake_fuzz_test.go b/go/snowflake_fuzz_test.go
new file mode 100644
index 0000000..a2ba624
--- /dev/null
+++ b/go/snowflake_fuzz_test.go
@@ -0,0 +1,102 @@
+package snowflake
+
+import "testing"
+
+func FuzzFromString(f *testing.F) {
+	s := New()
+	f.Add(s.String())
+	f.Add("")
+	f.Add("0")
+	f.Add("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789")
+
+	f.Fuzz(func(t *testing.T, data string) {
+		result, err := FromString(data)
+		if err != nil {
+			return
+		}
+		if !result.IsZero() {
+			roundTrip := result.String()
+			parsed, err := FromString(roundTrip)
+			if err != nil {
+				t.Fatalf("round-trip failed: %v", err)
+			}
+			if parsed != result {
+				t.Fatalf("round-trip mismatch: %v != %v", result, parsed)
+			}
+		}
+	})
+}
+
+func FuzzFromHex(f *testing.F) {
+	s := New()
+	f.Add(s.Hex())
+	f.Add("")
+	f.Add("00")
+
+	f.Fuzz(func(t *testing.T, data string) {
+		result, err := FromHex(data)
+		if err != nil {
+			return
+		}
+		roundTrip := result.Hex()
+		parsed, err := FromHex(roundTrip)
+		if err != nil {
+			t.Fatalf("round-trip failed: %v", err)
+		}
+		if parsed != result {
+			t.Fatalf("round-trip mismatch: %v != %v", result, parsed)
+		}
+	})
+}
+
+func FuzzUnmarshalJSON(f *testing.F) {
+	s := New()
+	serialized, _ := s.MarshalJSON()
+	f.Add(string(serialized))
+	f.Add(`""`)
+	f.Add(`"0"`)
+
+	f.Fuzz(func(t *testing.T, data string) {
+		var result Snowflake
+		err := result.UnmarshalJSON([]byte(data))
+		if err != nil {
+			return
+		}
+		if !result.IsZero() {
+			roundTrip, _ := result.MarshalJSON()
+			var parsed Snowflake
+			if err := parsed.UnmarshalJSON(roundTrip); err != nil {
+				t.Fatalf("round-trip failed: %v", err)
+			}
+			if parsed != result {
+				t.Fatalf("round-trip mismatch: %v != %v", result, parsed)
+			}
+		}
+	})
+}
+
+func FuzzUnmarshalText(f *testing.F) {
+	s := New()
+	serialized, _ := s.MarshalText()
+	f.Add(string(serialized))
+	f.Add("")
+	f.Add("0")
+
+	f.Fuzz(func(t *testing.T, data string) {
+		var result Snowflake
+		err := result.UnmarshalText([]byte(data))
+		if err != nil {
+			return
+		}
+		if !result.IsZero() {
+			roundTrip, _ := result.MarshalText()
+			var parsed Snowflake
+			if err := parsed.UnmarshalText(roundTrip); err != nil {
+				t.Fatalf("round-trip failed: %v", err)
+			}
+			if parsed != result {
+				t.Fatalf("round-trip mismatch: %v != %v", result, parsed)
+			}
+		}
+	})
+}