require_relative '../../spec_helper'

ruby_version_is ""..."3.4" do
  require 'bigdecimal'

  describe "BigDecimal#-@" do
    before :each do
      @one = BigDecimal("1")
      @zero = BigDecimal("0")
      @zero_pos = BigDecimal("+0")
      @zero_neg = BigDecimal("-0")
      @nan = BigDecimal("NaN")
      @infinity = BigDecimal("Infinity")
      @infinity_minus = BigDecimal("-Infinity")
      @one_minus = BigDecimal("-1")
      @frac_1 = BigDecimal("1E-99999")
      @frac_2 = BigDecimal("0.9E-99999")
      @big = BigDecimal("333E99999")
      @big_neg = BigDecimal("-333E99999")
      @values = [@one, @zero, @zero_pos, @zero_neg, @infinity,
        @infinity_minus, @one_minus, @frac_1, @frac_2, @big, @big_neg]
    end

    it "negates self" do
      @one.send(:-@).should == @one_minus
      @one_minus.send(:-@).should == @one
      @frac_1.send(:-@).should == BigDecimal("-1E-99999")
      @frac_2.send(:-@).should == BigDecimal("-0.9E-99999")
      @big.send(:-@).should == @big_neg
      @big_neg.send(:-@).should == @big
      BigDecimal("2.221").send(:-@).should == BigDecimal("-2.221")
      BigDecimal("2E10000").send(:-@).should == BigDecimal("-2E10000")
      some_number = BigDecimal("2455999221.5512")
      some_number_neg = BigDecimal("-2455999221.5512")
      some_number.send(:-@).should == some_number_neg
      (-BigDecimal("-5.5")).should == BigDecimal("5.5")
      another_number = BigDecimal("-8.551551551551551551")
      another_number_pos = BigDecimal("8.551551551551551551")
      another_number.send(:-@).should == another_number_pos
      @values.each do |val|
        (val.send(:-@).send(:-@)).should == val
      end
    end

    it "properly handles special values" do
      @infinity.send(:-@).should == @infinity_minus
      @infinity_minus.send(:-@).should == @infinity
      @infinity.send(:-@).infinite?.should == -1
      @infinity_minus.send(:-@).infinite?.should == 1

      @zero.send(:-@).should == @zero
      @zero.send(:-@).sign.should == -1
      @zero_pos.send(:-@).should == @zero
      @zero_pos.send(:-@).sign.should == -1
      @zero_neg.send(:-@).should == @zero
      @zero_neg.send(:-@).sign.should == 1

      @nan.send(:-@).should.nan?
    end
  end
end
