fix: camel cased key of map item in config (#2715)

* fix: camel cased key of map item in config

* fix: mapping anonymous problem

* fix: mapping anonymous problem

* chore: refactor

* chore: add more tests

* chore: refactor

core/mapping/valuer_test.go

@@ -31,3 +31,27 @@ func TestMapValuerWithInherit_Value(t *testing.T) {
 	assert.Equal(t, "localhost", m["host"])
 	assert.Equal(t, 8080, m["port"])
 }
+
+func TestRecursiveValuer_Value(t *testing.T) {
+	input := map[string]interface{}{
+		"component": map[string]interface{}{
+			"name": "test",
+			"foo": map[string]interface{}{
+				"bar": "baz",
+			},
+		},
+		"foo": "value",
+	}
+	valuer := recursiveValuer{
+		current: mapValuer(input["component"].(map[string]interface{})),
+		parent: simpleValuer{
+			current: mapValuer(input),
+		},
+	}
+
+	val, ok := valuer.Value("foo")
+	assert.True(t, ok)
+	assert.EqualValues(t, map[string]interface{}{
+		"bar": "baz",
+	}, val)
+}