spec/ruby/core/complex/finite_spec.rb


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require_relative '../../spec_helper'

describe "Complex#finite?" do
  it "returns true if magnitude is finite" do
    (1+1i).should.finite?
  end

  it "returns false for positive infinity" do
    value = Complex(Float::INFINITY, 42)
    value.should_not.finite?
  end

  it "returns false for positive complex with infinite imaginary" do
    value = Complex(1, Float::INFINITY)
    value.should_not.finite?
  end

  it "returns false for negative infinity" do
    value = -Complex(Float::INFINITY, 42)
    value.should_not.finite?
  end

  it "returns false for negative complex with infinite imaginary" do
    value = -Complex(1, Float::INFINITY)
    value.should_not.finite?
  end

  it "returns false for NaN" do
    value = Complex(Float::NAN, Float::NAN)
    value.should_not.finite?
  end
end