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61 lines
2.3 KiB
Ruby
61 lines
2.3 KiB
Ruby
require_relative '../../spec_helper'
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require_relative 'fixtures/classes'
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describe "UnboundMethod#bind" do
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before :each do
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@normal_um = UnboundMethodSpecs::Methods.new.method(:foo).unbind
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@parent_um = UnboundMethodSpecs::Parent.new.method(:foo).unbind
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@child1_um = UnboundMethodSpecs::Child1.new.method(:foo).unbind
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@child2_um = UnboundMethodSpecs::Child2.new.method(:foo).unbind
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end
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it "raises TypeError if object is not kind_of? the Module the method defined in" do
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-> { @normal_um.bind(UnboundMethodSpecs::B.new) }.should raise_error(TypeError)
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end
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it "returns Method for any object that is kind_of? the Module method was extracted from" do
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@normal_um.bind(UnboundMethodSpecs::Methods.new).should be_kind_of(Method)
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end
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it "returns Method on any object when UnboundMethod is unbound from a module" do
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UnboundMethodSpecs::Mod.instance_method(:from_mod).bind(Object.new).should be_kind_of(Method)
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end
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it "the returned Method is equal to the one directly returned by obj.method" do
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obj = UnboundMethodSpecs::Methods.new
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@normal_um.bind(obj).should == obj.method(:foo)
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end
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it "returns Method for any object kind_of? the Module the method is defined in" do
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@parent_um.bind(UnboundMethodSpecs::Child1.new).should be_kind_of(Method)
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@child1_um.bind(UnboundMethodSpecs::Parent.new).should be_kind_of(Method)
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@child2_um.bind(UnboundMethodSpecs::Child1.new).should be_kind_of(Method)
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end
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it "allows binding a Kernel method retrieved from Object on BasicObject" do
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Object.instance_method(:instance_of?).bind(BasicObject.new).call(BasicObject).should == true
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end
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it "returns a callable method" do
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obj = UnboundMethodSpecs::Methods.new
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@normal_um.bind(obj).call.should == obj.foo
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end
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it "binds a Parent's class method to any Child's class methods" do
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m = UnboundMethodSpecs::Parent.method(:class_method).unbind.bind(UnboundMethodSpecs::Child1)
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m.should be_an_instance_of(Method)
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m.call.should == "I am UnboundMethodSpecs::Child1"
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end
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it "will raise when binding a an object singleton's method to another object" do
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other = UnboundMethodSpecs::Parent.new
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p = UnboundMethodSpecs::Parent.new
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class << p
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def singleton_method
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:single
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end
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end
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um = p.method(:singleton_method).unbind
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->{ um.bind(other) }.should raise_error(TypeError)
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end
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end
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