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require_relative '../../spec_helper'
require_relative 'fixtures/classes'
describe "Module#attr_writer" do
it "creates a setter for each given attribute name" do
c = Class.new do
attr_writer :test1, "test2"
end
o = c.new
o.respond_to?("test1").should == false
o.respond_to?("test2").should == false
o.respond_to?("test1=").should == true
o.test1 = "test_1"
o.instance_variable_get(:@test1).should == "test_1"
o.respond_to?("test2=").should == true
o.test2 = "test_2"
o.instance_variable_get(:@test2).should == "test_2"
o.send(:test1=,"test_1 updated")
o.instance_variable_get(:@test1).should == "test_1 updated"
o.send(:test2=,"test_2 updated")
o.instance_variable_get(:@test2).should == "test_2 updated"
end
it "not allows for adding an attr_writer to an immediate" do
class TrueClass
attr_writer :spec_attr_writer
end
-> { true.spec_attr_writer = "a" }.should raise_error(FrozenError)
end
it "raises FrozenError if the receiver if frozen" do
c = Class.new do
attr_writer :foo
end
obj = c.new
obj.freeze
-> { obj.foo = 42 }.should raise_error(FrozenError)
end
it "converts non string/symbol names to strings using to_str" do
(o = mock('test')).should_receive(:to_str).any_number_of_times.and_return("test")
c = Class.new do
attr_writer o
end
c.new.respond_to?("test").should == false
c.new.respond_to?("test=").should == true
end
it "raises a TypeError when the given names can't be converted to strings using to_str" do
o = mock('test1')
-> { Class.new { attr_writer o } }.should raise_error(TypeError)
(o = mock('123')).should_receive(:to_str).and_return(123)
-> { Class.new { attr_writer o } }.should raise_error(TypeError)
end
it "applies current visibility to methods created" do
c = Class.new do
protected
attr_writer :foo
end
-> { c.new.foo=1 }.should raise_error(NoMethodError)
end
it "is a public method" do
Module.should have_public_instance_method(:attr_writer, false)
end
ruby_version_is ""..."3.0" do
it "returns nil" do
Class.new do
(attr_writer :foo, 'bar').should == nil
end
end
end
ruby_version_is "3.0" do
it "returns an array of defined method names as symbols" do
Class.new do
(attr_writer :foo, 'bar').should == [:foo=, :bar=]
end
end
end
end
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