{V(new(bytes.Buffer)), ReaderV(new(bytes.Buffer))},
	{ReadWriterV(new(bytes.Buffer)), ReaderV(new(bytes.Buffer))},
	{V(new(bytes.Buffer)), ReadWriterV(new(bytes.Buffer))},
}

func TestConvert(t *testing.T) {
	canConvert := map[[2]Type]bool{}
	all := map[Type]bool{}

	for _, tt := range convertTests {
		t1 := tt.in.Type()
		if !t1.ConvertibleTo(t1) {