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require 'spec_helper'
require 'yaml'
require 'psych'
require 'syck'
module Spy
describe "serialization" do
class SerializableObject < Struct.new(:foo, :bar); end
class SerializableMockProxy
attr_reader :mock_proxy
def initialize(mock_proxy)
@mock_proxy = mock_proxy
end
def ==(other)
other.class == self.class && other.mock_proxy == mock_proxy
end
end
def self.with_yaml_loaded(&block)
context 'with YAML loaded' do
module_eval(&block)
end
end
def self.without_yaml_loaded(&block)
context 'without YAML loaded' do
before do
# We can't really unload yaml, but we can fake it here...
@yaml = YAML
Object.send(:remove_const, "YAML")
Struct.class_eval do
alias __old_to_yaml to_yaml
undef to_yaml
end
end
module_eval(&block)
after do
Struct.class_eval do
alias to_yaml __old_to_yaml
undef __old_to_yaml
end
Object.send(:const_set, "YAML", @yaml)
end
end
end
let(:serializable_object) { SerializableObject.new(7, "something") }
def set_spy
Spy::Subroutine.new(serializable_object, :bazz).hook(force: true).and_return(5)
end
shared_examples_for 'normal YAML serialization' do
it 'serializes to yaml the same with and without stubbing, using #to_yaml' do
set_spy
expect { Spy.get(serializable_object, :bazz) }.to_not change { serializable_object.to_yaml }
end
it 'serializes to yaml the same with and without stubbing, using YAML.dump' do
set_spy
expect { Spy.get(serializable_object, :bazz) }.to_not change { ::YAML.dump(serializable_object) }
end
end
with_yaml_loaded do
compiled_with_psych = begin
require 'psych'
true
rescue LoadError
false
end
if compiled_with_psych
context 'using Syck as the YAML engine' do
before(:each) { ::YAML::ENGINE.yamler = 'syck' }
it_behaves_like 'normal YAML serialization'
end
context 'using Psych as the YAML engine' do
before(:each) { ::YAML::ENGINE.yamler = 'psych' }
it_behaves_like 'normal YAML serialization'
end
else
it_behaves_like 'normal YAML serialization'
end
end
without_yaml_loaded do
it 'does not add #to_yaml to the stubbed object' do
expect(serializable_object).not_to respond_to(:to_yaml)
set_spy
expect(serializable_object).not_to respond_to(:to_yaml)
end
end
it 'marshals the same with and without stubbing' do
expect { Spy.get(serializable_object, :bazz) }.to_not change { Marshal.dump(serializable_object) }
end
describe "an object that has its own mock_proxy instance variable" do
let(:serializable_object) { SerializableMockProxy.new(:my_mock_proxy) }
it 'does not interfere with its marshalling' do
marshalled_copy = Marshal.load(Marshal.dump(serializable_object))
expect(marshalled_copy).to eq serializable_object
end
end
end
end
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