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require File.expand_path('../../../spec_helper', __FILE__)
describe :complex_abs, :shared => true do
it "returns the modulus: |a + bi| = sqrt((a ^ 2) + (b ^ 2))" do
Complex(0, 0).send(@method).should == 0
Complex(3, 4).send(@method).should == 5 # well-known integer case
Complex(-3, 4).send(@method).should == 5
Complex(1, -1).send(@method).should be_close(Math.sqrt(2), TOLERANCE)
Complex(6.5, 0).send(@method).should be_close(6.5, TOLERANCE)
Complex(0, -7.2).send(@method).should be_close(7.2, TOLERANCE)
end
end
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