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require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)
describe "Kernel#equal?" do
it "returns true only if obj and other are the same object" do
o1 = mock('o1')
o2 = mock('o2')
(o1.equal? o1).should == true
(o2.equal? o2).should == true
(o1.equal? o2).should== false
(nil.equal? nil).should == true
(o1.equal? nil).should== false
(nil.equal? o2).should== false
('stuff'.equal? 'stuff').should == false
(true.equal? true).should == true
(false.equal? false).should == true
end
it "returns true if obj and anObject have the same value." do
o1 = 1
o2 = :hola
(:hola.equal? o1).should == false
(1.equal? o1).should == true
(:hola.equal? o2).should == true
end
it "is unaffected by overriding object_id" do
o1 = mock("object")
o1.stub!(:object_id).and_return(10)
o2 = mock("object")
o2.stub!(:object_id).and_return(10)
o1.equal?(o2).should be_false
end
it "is unaffected by overriding ==" do
# different objects, overriding == to return true
o1 = mock("object")
o1.stub!(:==).and_return(true)
o2 = mock("object")
o1.equal?(o2).should be_false
# same objects, overriding == to return false
o3 = mock("object")
o3.stub!(:==).and_return(false)
o3.equal?(o3).should be_true
end
it "is unaffected by overriding eql?" do
# different objects, overriding eql? to return true
o1 = mock("object")
o1.stub!(:eql?).and_return(true)
o2 = mock("object")
o1.equal?(o2).should be_false
# same objects, overriding eql? to return false
o3 = mock("object")
o3.stub!(:eql?).and_return(false)
o3.equal?(o3).should be_true
end
it "is unaffected by overriding __id__" do
o1 = mock("object")
o1.stub!(:__id__).and_return(10)
o2 = mock("object")
o2.stub!(:__id__).and_return(10)
o1.equal?(o2).should be_false
end
end
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