Prevent mutation of original data (#23)

lib/datory/attributes/serialization/model.rb

@@ -14,7 +14,7 @@ def self.to_hash(...)
 
  def prepare(data)
  if data.is_a?(Hash)
- build(data)
+ build(data.deep_dup)
  else
  data
  end

spec/examples/usual/example1/serial_spec.rb

@@ -260,6 +260,8 @@
  describe "singular" do
  subject(:perform) { described_class.serialize(serial) }
 
+ it { expect { perform }.not_to(change { serial }) }
+
  it do
  expect(perform).to match(
  {
@@ -316,6 +318,8 @@
 
  let(:serials) { [serial] }
 
+ it { expect { perform }.not_to(change { serials }) }
+
  it do
  expect(perform).to contain_exactly(
  {
@@ -514,13 +518,13 @@
  end
 
  let(:ratings) do
- Usual::Example1::Ratings.new(
- imdb: Usual::Example1::Rating.new(
+ {
+ imdb: {
  value: 8.6,
  quantity: 324_000,
  link_url: nil # NOTE: This example explicitly passes the value `nil` for the optional attribute.
- )
- )
+ }
+ }
  end
 
  context "when the data required for work is valid" do

spec/examples/usual/example2/product_spec.rb

@@ -132,6 +132,8 @@
  describe "singular" do
  subject(:perform) { described_class.serialize(product) }
 
+ it { expect { perform }.not_to(change { product }) }
+
  it do
  expect(perform).to match(
  {
@@ -153,6 +155,8 @@
 
  let(:products) { [product] }
 
+ it { expect { perform }.not_to(change { products }) }
+
  it do
  expect(perform).to contain_exactly(
  {

spec/examples/usual/example3/language_spec.rb

@@ -130,6 +130,8 @@
  describe "singular" do
  subject(:perform) { described_class.serialize(language) }
 
+ it { expect { perform }.not_to(change { language }) }
+
  it do
  expect(perform).to match(
  {
@@ -152,6 +154,8 @@
 
  let(:languages) { [language] }
 
+ it { expect { perform }.not_to(change { languages }) }
+
  it do
  expect(perform).to contain_exactly(
  {

spec/examples/usual/example4/comment_spec.rb

@@ -120,6 +120,8 @@
  describe "singular" do
  subject(:perform) { described_class.serialize(comment) }
 
+ it { expect { perform }.not_to(change { comment }) }
+
  it do
  expect(perform).to match(
  {
@@ -138,6 +140,8 @@
 
  let(:comments) { [comment] }
 
+ it { expect { perform }.not_to(change { comments }) }
+
  it do
  expect(perform).to contain_exactly(
  {