rewrite how eface and iface are handled

value_tests/iface_test.go

@@ -0,0 +1,45 @@
+package test
+
+import "io"
+
+func init() {
+	var pCloser1 = func(str string) *io.Closer {
+		closer := io.Closer(strCloser1(str))
+		return &closer
+	}
+	var pCloser2 = func(str string) *io.Closer {
+		strCloser := strCloser2(str)
+		closer := io.Closer(&strCloser)
+		return &closer
+	}
+	marshalCases = append(marshalCases,
+		pCloser1("hello"),
+		pCloser2("hello"),
+	)
+	unmarshalCases = append(unmarshalCases, unmarshalCase{
+		ptr: (*[]io.Closer)(nil),
+		input: "[null]",
+	}, unmarshalCase{
+		obj: func() interface{} {
+			strCloser := strCloser2("")
+			return &struct {
+				Field io.Closer
+			}{
+				&strCloser,
+			}
+		},
+		input: `{"Field": "hello"}`,
+	})
+}
+
+type strCloser1 string
+
+func (closer strCloser1) Close() error {
+	return nil
+}
+
+type strCloser2 string
+
+func (closer *strCloser2) Close() error {
+	return nil
+}