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require_relative '../../spec_helper'
describe "Complex#<=>" do
it "returns nil if either self or argument has imaginary part" do
(Complex(5, 1) <=> Complex(2)).should be_nil
(Complex(1) <=> Complex(2, 1)).should be_nil
(5 <=> Complex(2, 1)).should be_nil
end
it "returns nil if argument is not numeric" do
(Complex(5, 1) <=> "cmp").should be_nil
(Complex(1) <=> "cmp").should be_nil
(Complex(1) <=> Object.new).should be_nil
end
it "returns 0, 1, or -1 if self and argument do not have imaginary part" do
(Complex(5) <=> Complex(2)).should == 1
(Complex(2) <=> Complex(3)).should == -1
(Complex(2) <=> Complex(2)).should == 0
(Complex(5) <=> 2).should == 1
(Complex(2) <=> 3).should == -1
(Complex(2) <=> 2).should == 0
end
end
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