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File: //usr/local/rvm/src/ruby-2.5.9/spec/ruby/core/rational/integer_spec.rb

describe "Rational#integer?" do
  it "returns false for a rational with a numerator and no denominator" do
    Rational(20).integer?.should be_false
  end

  it "returns false for a rational with a numerator and a denominator" do
    Rational(20,3).integer?.should be_false
  end
end