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require 'abstract_unit'
uses_mocha 'Memoizable' do
class MemoizableTest < Test::Unit::TestCase
class Person
include ActiveSupport::Memoizable
def name
fetch_name_from_floppy
end
memoize :name
def age
nil
end
memoize :age
private
def fetch_name_from_floppy
"Josh"
end
end
def test_memoization
person = Person.new
assert_equal "Josh", person.name
person.expects(:fetch_name_from_floppy).never
2.times { assert_equal "Josh", person.name }
end
def test_memoized_methods_are_frozen
person = Person.new
person.freeze
assert_equal "Josh", person.name
assert_equal true, person.name.frozen?
end
def test_memoization_frozen_with_nil_value
person = Person.new
person.freeze
assert_equal nil, person.age
end
def test_double_memoization
assert_raise(RuntimeError) { Person.memoize :name }
end
end
end
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