require_relative '../../spec_helper' require 'bigdecimal' describe "BigDecimal#>" do before :each do @zero = BigDecimal("0") @zero_pos = BigDecimal("+0") @zero_neg = BigDecimal("-0") @mixed = BigDecimal("1.23456789") @pos_int = BigDecimal("2E5555") @neg_int = BigDecimal("-2E5555") @pos_frac = BigDecimal("2E-9999") @neg_frac = BigDecimal("-2E-9999") @int_mock = mock('123') class << @int_mock def coerce(other) return [other, BigDecimal('123')] end def >(other) BigDecimal('123') > other end end @values = [@mixed, @pos_int, @neg_int, @pos_frac, @neg_frac, -2**32, -2**31, -2**30, -2**16, -2**8, -100, -10, -1, @zero , 1, 2, 10, 10.5, 2**8, 2**16, 2**32, @int_mock, @zero_pos, @zero_neg] @infinity = BigDecimal("Infinity") @infinity_neg = BigDecimal("-Infinity") @float_infinity = Float::INFINITY @float_infinity_neg = -Float::INFINITY @nan = BigDecimal("NaN") end it "returns true if a > b" do one = BigDecimal("1") two = BigDecimal("2") frac_1 = BigDecimal("1E-99999") frac_2 = BigDecimal("0.9E-99999") (@zero > one).should == false (two > @zero).should == true (frac_2 > frac_1).should == false (@neg_int > @pos_int).should == false (@pos_int > @neg_int).should == true (@neg_int > @pos_frac).should == false (@pos_frac > @neg_int).should == true (@zero > @zero_pos).should == false (@zero > @zero_neg).should == false (@zero_neg > @zero_pos).should == false (@zero_pos > @zero_neg).should == false end it "properly handles infinity values" do @values.each { |val| (val > @infinity).should == false (@infinity > val).should == true (val > @infinity_neg).should == true (@infinity_neg > val).should == false } (@infinity > @infinity).should == false (@infinity_neg > @infinity_neg).should == false (@infinity > @infinity_neg).should == true (@infinity_neg > @infinity).should == false end it "properly handles Float infinity values" do @values.each { |val| (val > @float_infinity).should == false (@float_infinity > val).should == true (val > @float_infinity_neg).should == true (@float_infinity_neg > val).should == false } end it "properly handles NaN values" do @values += [@infinity, @infinity_neg, @nan] @values.each { |val| (@nan > val).should == false (val > @nan).should == false } end it "raises an ArgumentError if the argument can't be coerced into a BigDecimal" do -> {@zero > nil }.should raise_error(ArgumentError) -> {@infinity > nil }.should raise_error(ArgumentError) -> {@infinity_neg > nil }.should raise_error(ArgumentError) -> {@mixed > nil }.should raise_error(ArgumentError) -> {@pos_int > nil }.should raise_error(ArgumentError) -> {@neg_frac > nil }.should raise_error(ArgumentError) end end