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require_relative '../../spec_helper'
require_relative 'fixtures/classes'
ruby_version_is '2.7' do
describe "UnboundMethod#bind_call" do
before :each do
@normal_um = UnboundMethodSpecs::Methods.new.method(:foo).unbind
@parent_um = UnboundMethodSpecs::Parent.new.method(:foo).unbind
@child1_um = UnboundMethodSpecs::Child1.new.method(:foo).unbind
@child2_um = UnboundMethodSpecs::Child2.new.method(:foo).unbind
end
it "raises TypeError if object is not kind_of? the Module the method defined in" do
-> { @normal_um.bind_call(UnboundMethodSpecs::B.new) }.should raise_error(TypeError)
end
it "binds and calls the method if object is kind_of the Module the method defined in" do
@normal_um.bind_call(UnboundMethodSpecs::Methods.new).should == true
end
it "binds and calls the method on any object when UnboundMethod is unbound from a module" do
UnboundMethodSpecs::Mod.instance_method(:from_mod).bind_call(Object.new).should == nil
end
it "binds and calls the method for any object kind_of? the Module the method is defined in" do
@parent_um.bind_call(UnboundMethodSpecs::Child1.new).should == nil
@child1_um.bind_call(UnboundMethodSpecs::Parent.new).should == nil
@child2_um.bind_call(UnboundMethodSpecs::Child1.new).should == nil
end
it "binds and calls a Kernel method retrieved from Object on BasicObject" do
Object.instance_method(:instance_of?).bind_call(BasicObject.new, BasicObject).should == true
end
it "binds and calls a Parent's class method to any Child's class methods" do
um = UnboundMethodSpecs::Parent.method(:class_method).unbind
um.bind_call(UnboundMethodSpecs::Child1).should == "I am UnboundMethodSpecs::Child1"
end
it "will raise when binding a an object singleton's method to another object" do
other = UnboundMethodSpecs::Parent.new
p = UnboundMethodSpecs::Parent.new
class << p
def singleton_method
:single
end
end
um = p.method(:singleton_method).unbind
->{ um.bind_call(other) }.should raise_error(TypeError)
end
end
end
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