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# frozen_string_literal: true
RSpec.describe "serializing MemoWise" do # rubocop:disable RSpec/DescribeClass
context "when serializing using Marshal" do
let(:class_with_memo) do
Class.new do
prepend MemoWise
attr_reader :name, :name_upper_counter, :hello_counter
def initialize(name:)
@name = name
@name_upper_counter = 0
@hello_counter = 0
end
# We test both 0- and 1-arity methods here because they use different
# storage schemes.
def name_upper
@name_upper_counter += 1
name.upcase
end
memo_wise :name_upper
def hello(n) # rubocop:disable Naming/MethodParameterName
@hello_counter += 1
"Hello #{n} times, #{name}!"
end
memo_wise :hello
end
end
before :each do
stub_const("ClassForTest", class_with_memo)
end
it "dumps and loads without error" do
obj1 = ClassForTest.new(name: "foo")
obj2 = Marshal.load(Marshal.dump(obj1))
expect(obj2.class).to be(ClassForTest)
expect(obj2.name).to eq(obj1.name)
end
it "dumps and loads memoized state" do
obj1 = ClassForTest.new(name: "foo")
obj1.name_upper
obj1.hello(3)
obj2 = Marshal.load(Marshal.dump(obj1))
expect { obj2.name_upper }.
not_to change { obj2.name_upper_counter }.
from(1)
expect { obj2.hello(3) }.
not_to change { obj2.hello_counter }.
from(1)
expect(obj2.name_upper).to eq("FOO")
expect(obj2.hello(3)).to eq("Hello 3 times, foo!")
end
end
end
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