1 files changed, 21 insertions, 0 deletions
diff --git a/compat/json/compat_test.go b/compat/json/compat_test.go
index 128bd1b..0c14a60 100644
--- a/compat/json/compat_test.go
+++ b/compat/json/compat_test.go
@@ -11,6 +11,27 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
+func TestCompatHTMLEscape(t *testing.T) {
+	t.Parallel()
+	type testcase struct {
+		In  string
+		Out string
+	}
+	testcases := map[string]testcase{
+		"invalid": {In: `x`, Out: `x`},
+	}
+	for tcName, tc := range testcases {
+		tc := tc
+		t.Run(tcName, func(t *testing.T) {
+			t.Parallel()
+			t.Logf("in=%q", tc.In)
+			var dst bytes.Buffer
+			HTMLEscape(&dst, []byte(tc.In))
+			assert.Equal(t, tc.Out, dst.String())
+		})
+	}
+}
+
 func TestCompatValid(t *testing.T) {
 	t.Parallel()
 	type testcase struct {