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require "abstract_unit"
require "active_support/core_ext/module/attribute_accessors"
class ModuleAttributeAccessorTest < ActiveSupport::TestCase
def setup
m = @module = Module.new do
mattr_accessor :foo
mattr_accessor :bar, instance_writer: false
mattr_reader :shaq, instance_reader: false
mattr_accessor :camp, instance_accessor: false
cattr_accessor(:defa) { "default_accessor_value" }
cattr_reader(:defr) { "default_reader_value" }
cattr_writer(:defw) { "default_writer_value" }
cattr_accessor(:quux) { :quux }
end
@class = Class.new
@class.instance_eval { include m }
@object = @class.new
end
def test_should_use_mattr_default
assert_nil @module.foo
assert_nil @object.foo
end
def test_should_set_mattr_value
@module.foo = :test
assert_equal :test, @object.foo
@object.foo = :test2
assert_equal :test2, @module.foo
end
def test_cattr_accessor_default_value
assert_equal :quux, @module.quux
assert_equal :quux, @object.quux
end
def test_should_not_create_instance_writer
assert_respond_to @module, :foo
assert_respond_to @module, :foo=
assert_respond_to @object, :bar
assert !@object.respond_to?(:bar=)
end
def test_should_not_create_instance_reader
assert_respond_to @module, :shaq
assert !@object.respond_to?(:shaq)
end
def test_should_not_create_instance_accessors
assert_respond_to @module, :camp
assert !@object.respond_to?(:camp)
assert !@object.respond_to?(:camp=)
end
def test_should_raise_name_error_if_attribute_name_is_invalid
exception = assert_raises NameError do
Class.new do
cattr_reader "1nvalid"
end
end
assert_equal "invalid attribute name: 1nvalid", exception.message
exception = assert_raises NameError do
Class.new do
cattr_writer "1nvalid"
end
end
assert_equal "invalid attribute name: 1nvalid", exception.message
exception = assert_raises NameError do
Class.new do
mattr_reader "valid_part\ninvalid_part"
end
end
assert_equal "invalid attribute name: valid_part\ninvalid_part", exception.message
exception = assert_raises NameError do
Class.new do
mattr_writer "valid_part\ninvalid_part"
end
end
assert_equal "invalid attribute name: valid_part\ninvalid_part", exception.message
end
def test_should_use_default_value_if_block_passed
assert_equal "default_accessor_value", @module.defa
assert_equal "default_reader_value", @module.defr
assert_equal "default_writer_value", @module.class_variable_get("@@defw")
end
def test_should_not_invoke_default_value_block_multiple_times
count = 0
@module.cattr_accessor(:defcount) { count += 1 }
assert_equal 1, count
end
end
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