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require_relative '../../spec_helper'
describe "Kernel#initialize_copy" do
it "returns self" do
obj = Object.new
obj.send(:initialize_copy, obj).should.equal?(obj)
end
it "does nothing if the argument is the same as the receiver" do
obj = Object.new
obj.send(:initialize_copy, obj).should.equal?(obj)
obj = Object.new.freeze
obj.send(:initialize_copy, obj).should.equal?(obj)
1.send(:initialize_copy, 1).should.equal?(1)
end
it "raises FrozenError if the receiver is frozen" do
-> { Object.new.freeze.send(:initialize_copy, Object.new) }.should raise_error(FrozenError)
-> { 1.send(:initialize_copy, Object.new) }.should raise_error(FrozenError)
end
it "raises TypeError if the objects are of different class" do
klass = Class.new
sub = Class.new(klass)
a = klass.new
b = sub.new
message = 'initialize_copy should take same class object'
-> { a.send(:initialize_copy, b) }.should raise_error(TypeError, message)
-> { b.send(:initialize_copy, a) }.should raise_error(TypeError, message)
-> { a.send(:initialize_copy, 1) }.should raise_error(TypeError, message)
-> { a.send(:initialize_copy, 1.0) }.should raise_error(TypeError, message)
end
end
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