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59 lines
2.1 KiB
Ruby
59 lines
2.1 KiB
Ruby
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require File.expand_path('../../../spec_helper', __FILE__)
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require 'bigdecimal'
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describe "BigDecimal#-@" do
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before :each do
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@one = BigDecimal("1")
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@zero = BigDecimal("0")
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@zero_pos = BigDecimal("+0")
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@zero_neg = BigDecimal("-0")
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@nan = BigDecimal("NaN")
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@infinity = BigDecimal("Infinity")
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@infinity_minus = BigDecimal("-Infinity")
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@one_minus = BigDecimal("-1")
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@frac_1 = BigDecimal("1E-99999")
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@frac_2 = BigDecimal("0.9E-99999")
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@big = BigDecimal("333E99999")
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@big_neg = BigDecimal("-333E99999")
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@values = [@one, @zero, @zero_pos, @zero_neg, @infinity,
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@infinity_minus, @one_minus, @frac_1, @frac_2, @big, @big_neg]
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end
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it "negates self" do
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@one.send(:-@).should == @one_minus
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@one_minus.send(:-@).should == @one
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@frac_1.send(:-@).should == BigDecimal("-1E-99999")
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@frac_2.send(:-@).should == BigDecimal("-0.9E-99999")
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@big.send(:-@).should == @big_neg
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@big_neg.send(:-@).should == @big
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BigDecimal("2.221").send(:-@).should == BigDecimal("-2.221")
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BigDecimal("2E10000").send(:-@).should == BigDecimal("-2E10000")
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some_number = BigDecimal("2455999221.5512")
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some_number_neg = BigDecimal("-2455999221.5512")
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some_number.send(:-@).should == some_number_neg
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(-BigDecimal("-5.5")).should == BigDecimal("5.5")
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another_number = BigDecimal("-8.551551551551551551")
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another_number_pos = BigDecimal("8.551551551551551551")
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another_number.send(:-@).should == another_number_pos
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@values.each do |val|
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(val.send(:-@).send(:-@)).should == val
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end
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end
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it "properly handles special values" do
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@infinity.send(:-@).should == @infinity_minus
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@infinity_minus.send(:-@).should == @infinity
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@infinity.send(:-@).infinite?.should == -1
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@infinity_minus.send(:-@).infinite?.should == 1
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@zero.send(:-@).should == @zero
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@zero.send(:-@).sign.should == -1
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@zero_pos.send(:-@).should == @zero
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@zero_pos.send(:-@).sign.should == -1
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@zero_neg.send(:-@).should == @zero
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@zero_neg.send(:-@).sign.should == 1
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@nan.send(:-@).nan?.should == true
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end
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end
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