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require File.dirname(__FILE__) + '/../../spec_helper'
require 'complex'
describe "Complex#- with Complex" do
it "subtracts both the real and imaginary components" do
(Complex(1, 2) - Complex(10, 20)).should == Complex(1 - 10, 2 - 20)
(Complex(1.5, 2.1) - Complex(100.2, -30.3)).should == Complex(1.5 - 100.2, 2.1 - (-30.3))
end
end
describe "Complex#- with Integer" do
it "subtracts the real number from the real component of self" do
(Complex(1, 2) - 50).should == Complex(-49, 2)
(Complex(1, 2) - 50.5).should == Complex(-49.5, 2)
end
end
describe "Complex#- with Object" do
it "tries to coerce self into other" do
value = Complex(3, 9)
obj = mock("Object")
obj.should_receive(:coerce).with(value).and_return([2, 5])
(value - obj).should == 2 - 5
end
end
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