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97 lines
3.6 KiB
Ruby
97 lines
3.6 KiB
Ruby
require 'bigdecimal'
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describe :bigdecimal_mult, shared: true do
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before :each do
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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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@one = BigDecimal "1"
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@mixed = BigDecimal "1.23456789"
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@pos_int = BigDecimal "2E5555"
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@neg_int = BigDecimal "-2E5555"
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@pos_frac = BigDecimal "2E-9999"
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@neg_frac = BigDecimal "-2E-9999"
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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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@e3_minus = BigDecimal "3E-20001"
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@e = BigDecimal "1.00000000000000000000123456789"
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@tolerance = @e.sub @one, 1000
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@tolerance2 = BigDecimal "30001E-20005"
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@special_vals = [@infinity, @infinity_minus, @nan]
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@regular_vals = [ @one, @mixed, @pos_int, @neg_int,
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@pos_frac, @neg_frac, @one_minus,
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@frac_1, @frac_2
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]
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@zeroes = [@zero, @zero_pos, @zero_neg]
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end
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it "returns zero of appropriate sign if self or argument is zero" do
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@zero.send(@method, @zero, *@object).sign.should == BigDecimal::SIGN_POSITIVE_ZERO
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@zero_neg.send(@method, @zero_neg, *@object).sign.should == BigDecimal::SIGN_POSITIVE_ZERO
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@zero.send(@method, @zero_neg, *@object).sign.should == BigDecimal::SIGN_NEGATIVE_ZERO
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@zero_neg.send(@method, @zero, *@object).sign.should == BigDecimal::SIGN_NEGATIVE_ZERO
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@one.send(@method, @zero, *@object).sign.should == BigDecimal::SIGN_POSITIVE_ZERO
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@one.send(@method, @zero_neg, *@object).sign.should == BigDecimal::SIGN_NEGATIVE_ZERO
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@zero.send(@method, @one, *@object).sign.should == BigDecimal::SIGN_POSITIVE_ZERO
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@zero.send(@method, @one_minus, *@object).sign.should == BigDecimal::SIGN_NEGATIVE_ZERO
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@zero_neg.send(@method, @one_minus, *@object).sign.should == BigDecimal::SIGN_POSITIVE_ZERO
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@zero_neg.send(@method, @one, *@object).sign.should == BigDecimal::SIGN_NEGATIVE_ZERO
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end
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it "returns NaN if NaN is involved" do
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values = @regular_vals + @zeroes
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values.each do |val|
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@nan.send(@method, val, *@object).should.nan?
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val.send(@method, @nan, *@object).should.nan?
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end
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end
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it "returns zero if self or argument is zero" do
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values = @regular_vals + @zeroes
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values.each do |val|
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@zeroes.each do |zero|
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zero.send(@method, val, *@object).should == 0
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zero.send(@method, val, *@object).should.zero?
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val.send(@method, zero, *@object).should == 0
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val.send(@method, zero, *@object).should.zero?
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end
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end
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end
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it "returns infinite value if self or argument is infinite" do
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values = @regular_vals
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infs = [@infinity, @infinity_minus]
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values.each do |val|
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infs.each do |inf|
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inf.send(@method, val, *@object).should_not.finite?
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val.send(@method, inf, *@object).should_not.finite?
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end
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end
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@infinity.send(@method, @infinity, *@object).infinite?.should == 1
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@infinity_minus.send(@method, @infinity_minus, *@object).infinite?.should == 1
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@infinity.send(@method, @infinity_minus, *@object).infinite?.should == -1
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@infinity_minus.send(@method, @infinity, *@object).infinite?.should == -1
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@infinity.send(@method, @one, *@object).infinite?.should == 1
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@infinity_minus.send(@method, @one, *@object).infinite?.should == -1
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end
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it "returns NaN if the result is undefined" do
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@zero.send(@method, @infinity, *@object).should.nan?
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@zero.send(@method, @infinity_minus, *@object).should.nan?
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@infinity.send(@method, @zero, *@object).should.nan?
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@infinity_minus.send(@method, @zero, *@object).should.nan?
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end
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end
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