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require_relative '../../spec_helper'
require 'bigdecimal'
describe "BigDecimal#abs" do
before :each do
@one = BigDecimal("1")
@zero = BigDecimal("0")
@zero_pos = BigDecimal("+0")
@zero_neg = BigDecimal("-0")
@two = BigDecimal("2")
@three = BigDecimal("3")
@mixed = BigDecimal("1.23456789")
@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")
end
it "returns the absolute value" do
pos_int = BigDecimal("2E5555")
neg_int = BigDecimal("-2E5555")
pos_frac = BigDecimal("2E-9999")
neg_frac = BigDecimal("-2E-9999")
pos_int.abs.should == pos_int
neg_int.abs.should == pos_int
pos_frac.abs.should == pos_frac
neg_frac.abs.should == pos_frac
@one.abs.should == 1
@two.abs.should == 2
@three.abs.should == 3
@mixed.abs.should == @mixed
@one_minus.abs.should == @one
end
it "properly handles special values" do
@infinity.abs.should == @infinity
@infinity_minus.abs.should == @infinity
@nan.abs.should.nan? # have to do it this way, since == doesn't work on NaN
@zero.abs.should == 0
@zero.abs.sign.should == BigDecimal::SIGN_POSITIVE_ZERO
@zero_pos.abs.should == 0
@zero_pos.abs.sign.should == BigDecimal::SIGN_POSITIVE_ZERO
@zero_neg.abs.should == 0
@zero_neg.abs.sign.should == BigDecimal::SIGN_POSITIVE_ZERO
end
end
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