spec/ruby/shared/rational/arithmetic_exception_in_coerce.rb


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require File.expand_path('../../../fixtures/rational', __FILE__)

describe :rational_arithmetic_exception_in_coerce, shared: true do
  ruby_version_is ""..."2.5" do
    it "rescues exception (StandardError and subclasses) raised in other#coerce and raises TypeError" do
      b = mock("numeric with failed #coerce")
      b.should_receive(:coerce).and_raise(RationalSpecs::CoerceError)

      # e.g. Rational(3, 4) + b
      -> { Rational(3, 4).send(@method, b) }.should raise_error(TypeError, /MockObject can't be coerced into Rational/)
    end

    it "does not rescue Exception and StandardError siblings raised in other#coerce" do
      [Exception, NoMemoryError].each do |exception|
        b = mock("numeric with failed #coerce")
        b.should_receive(:coerce).and_raise(exception)

        # e.g. Rational(3, 4) + b
        -> { Rational(3, 4).send(@method, b) }.should raise_error(exception)
      end
    end
  end

  ruby_version_is "2.5" do
    it "does not rescue exception raised in other#coerce" do
      b = mock("numeric with failed #coerce")
      b.should_receive(:coerce).and_raise(RationalSpecs::CoerceError)

      # e.g. Rational(3, 4) + b
      -> { Rational(3, 4).send(@method, b) }.should raise_error(RationalSpecs::CoerceError)
    end
  end
end