test: add failing test for mitchellhGH-347

Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>
go-viper · Dec 18, 2023 · d48a857 · d48a857
1 parent 8244341
commit d48a857
Showing 1 changed file with 107 additions and 0 deletions.
diff --git a/mapstructure_bugs_test.go b/mapstructure_bugs_test.go
@@ -638,3 +638,110 @@ func TestDecode_nonComparableType(t *testing.T) {
 		t.Fatalf("fail: %#v", decodeTo.NonComparableType)
 	}
 }
+
+// GH-347: Decoding maps with multiple indirection results in an error
+func TestDecodeToMapWithMultipleIndirection(t *testing.T) {
+	t.Run("Struct", func(t *testing.T) {
+		type Struct struct {
+			Foo string `mapstructure:"foo"`
+		}
+
+		v := Struct{
+			Foo: "bar",
+		}
+
+		i := &v
+		ii := &i
+		iii := &ii
+
+		var actual map[string]interface{}
+
+		if err := Decode(iii, &actual); err != nil {
+			t.Fatal(err)
+		}
+
+		expected := map[string]interface{}{
+			"foo": "bar",
+		}
+
+		if !reflect.DeepEqual(actual, expected) {
+			t.Fatalf("expected: %#v, got: %#v", expected, actual)
+		}
+	})
+
+	t.Run("Map", func(t *testing.T) {
+		v := map[string]interface{}{
+			"foo": "bar",
+		}
+
+		i := &v
+		ii := &i
+		iii := &ii
+
+		var actual map[string]interface{}
+
+		if err := Decode(iii, &actual); err != nil {
+			t.Fatal(err)
+		}
+
+		expected := map[string]interface{}{
+			"foo": "bar",
+		}
+
+		if !reflect.DeepEqual(actual, expected) {
+			t.Fatalf("expected: %#v, got: %#v", expected, actual)
+		}
+	})
+
+	t.Run("Array", func(t *testing.T) {
+		v := [1]map[string]interface{}{
+			{
+				"foo": "bar",
+			},
+		}
+
+		i := &v
+		ii := &i
+		iii := &ii
+
+		var actual map[string]interface{}
+
+		if err := WeakDecode(iii, &actual); err != nil {
+			t.Fatal(err)
+		}
+
+		expected := map[string]interface{}{
+			"foo": "bar",
+		}
+
+		if !reflect.DeepEqual(actual, expected) {
+			t.Fatalf("expected: %#v, got: %#v", expected, actual)
+		}
+	})
+
+	t.Run("Slice", func(t *testing.T) {
+		v := []map[string]interface{}{
+			{
+				"foo": "bar",
+			},
+		}
+
+		i := &v
+		ii := &i
+		iii := &ii
+
+		var actual map[string]interface{}
+
+		if err := WeakDecode(iii, &actual); err != nil {
+			t.Fatal(err)
+		}
+
+		expected := map[string]interface{}{
+			"foo": "bar",
+		}
+
+		if !reflect.DeepEqual(actual, expected) {
+			t.Fatalf("expected: %#v, got: %#v", expected, actual)
+		}
+	})
+}