From 5ad613b21aaae4e5937bb281b7164d40d889aa3b Mon Sep 17 00:00:00 2001
From: Antoine Toulme <antoine@lunar-ocean.com>
Date: Tue, 2 Apr 2024 17:14:20 -0700
Subject: [PATCH] add TestRecursiveUnmarshaling

---
 confmap/confmap_test.go | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/confmap/confmap_test.go b/confmap/confmap_test.go
index 3e7552a207d..661c3fe550a 100644
--- a/confmap/confmap_test.go
+++ b/confmap/confmap_test.go
@@ -759,3 +759,27 @@ func TestUnmarshalOwnThroughEmbeddedSquashedStruct(t *testing.T) {
 	require.Equal(t, "success", cfg.Cfg.EmbeddedStructWithUnmarshal.success)
 	require.Equal(t, "bar", cfg.Cfg.EmbeddedStructWithUnmarshal.Foo)
 }
+
+type Recursive struct {
+	Foo string `mapstructure:"foo"`
+}
+
+func (r *Recursive) Unmarshal(conf *Conf) error {
+	newR := &Recursive{}
+	if err := conf.Unmarshal(newR); err != nil {
+		return err
+	}
+	*r = *newR
+	return nil
+}
+
+// Tests that a struct can unmarshal itself by creating a new copy of itself, unmarshaling itself, and setting its value.
+func TestRecursiveUnmarshaling(t *testing.T) {
+	t.Skip("this test fails to run because it engages in recursive unmarshaling")
+	conf := NewFromStringMap(map[string]any{
+		"foo": "something",
+	})
+	r := &Recursive{}
+	require.NoError(t, conf.Unmarshal(r))
+	require.Equal(t, "something", r.Foo)
+}