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require_relative '../../spec_helper'
describe "Kernel#<=>" do
it "returns 0 if self" do
obj = Object.new
obj.<=>(obj).should == 0
end
it "returns 0 if self is == to the argument" do
obj = mock('has ==')
obj.should_receive(:==).and_return(true)
obj.<=>(Object.new).should == 0
end
it "returns nil if self is eql? but not == to the argument" do
obj = mock('has eql?')
obj.should_not_receive(:eql?)
obj.<=>(Object.new).should be_nil
end
it "returns nil if self.==(arg) returns nil" do
obj = mock('wrong ==')
obj.should_receive(:==).and_return(nil)
obj.<=>(Object.new).should be_nil
end
it "returns nil if self is not == to the argument" do
obj = Object.new
obj.<=>(3.14).should be_nil
end
end
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