1 files changed, 50 insertions, 0 deletions
diff --git a/src/encoding/json/fold_test.go b/src/encoding/json/fold_test.go
new file mode 100644
index 0000000..9d6fd05
--- /dev/null
+++ b/src/encoding/json/fold_test.go
@@ -0,0 +1,50 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package json
+
+import (
+	"bytes"
+	"testing"
+)
+
+func FuzzEqualFold(f *testing.F) {
+	for _, ss := range [][2]string{
+		{"", ""},
+		{"123abc", "123ABC"},
+		{"αβδ", "ΑΒΔ"},
+		{"abc", "xyz"},
+		{"abc", "XYZ"},
+		{"1", "2"},
+		{"hello, world!", "hello, world!"},
+		{"hello, world!", "Hello, World!"},
+		{"hello, world!", "HELLO, WORLD!"},
+		{"hello, world!", "jello, world!"},
+		{"γειά, κόσμε!", "γειά, κόσμε!"},
+		{"γειά, κόσμε!", "Γειά, Κόσμε!"},
+		{"γειά, κόσμε!", "ΓΕΙΆ, ΚΌΣΜΕ!"},
+		{"γειά, κόσμε!", "ΛΕΙΆ, ΚΌΣΜΕ!"},
+		{"AESKey", "aesKey"},
+		{"AESKEY", "aes_key"},
+		{"aes_key", "AES_KEY"},
+		{"AES_KEY", "aes-key"},
+		{"aes-key", "AES-KEY"},
+		{"AES-KEY", "aesKey"},
+		{"aesKey", "AesKey"},
+		{"AesKey", "AESKey"},
+		{"AESKey", "aeskey"},
+		{"DESKey", "aeskey"},
+		{"AES Key", "aeskey"},
+	} {
+		f.Add([]byte(ss[0]), []byte(ss[1]))
+	}
+	equalFold := func(x, y []byte) bool { return string(foldName(x)) == string(foldName(y)) }
+	f.Fuzz(func(t *testing.T, x, y []byte) {
+		got := equalFold(x, y)
+		want := bytes.EqualFold(x, y)
+		if got != want {
+			t.Errorf("equalFold(%q, %q) = %v, want %v", x, y, got, want)
+		}
+	})
+}