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8c5b60eb22
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60525 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
47 lines
1.9 KiB
Ruby
47 lines
1.9 KiB
Ruby
require File.expand_path('../../../spec_helper', __FILE__)
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require 'bigdecimal'
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describe "BigDecimal#sign" do
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it "defines several constants for signs" do
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# are these really correct?
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BigDecimal::SIGN_POSITIVE_INFINITE.should == 3
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BigDecimal::SIGN_NEGATIVE_INFINITE.should == -3
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BigDecimal::SIGN_POSITIVE_ZERO.should == 1
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BigDecimal::SIGN_NEGATIVE_ZERO.should == -1
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BigDecimal::SIGN_POSITIVE_FINITE.should == 2
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BigDecimal::SIGN_NEGATIVE_FINITE.should == -2
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end
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it "returns positive value if BigDecimal greater than 0" do
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BigDecimal("1").sign.should == BigDecimal::SIGN_POSITIVE_FINITE
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BigDecimal("1E-20000000").sign.should == BigDecimal::SIGN_POSITIVE_FINITE
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BigDecimal("1E200000000").sign.should == BigDecimal::SIGN_POSITIVE_FINITE
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BigDecimal("Infinity").sign.should == BigDecimal::SIGN_POSITIVE_INFINITE
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end
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it "returns negative value if BigDecimal less than 0" do
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BigDecimal("-1").sign.should == BigDecimal::SIGN_NEGATIVE_FINITE
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BigDecimal("-1E-9990000").sign.should == BigDecimal::SIGN_NEGATIVE_FINITE
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BigDecimal("-1E20000000").sign.should == BigDecimal::SIGN_NEGATIVE_FINITE
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BigDecimal("-Infinity").sign.should == BigDecimal::SIGN_NEGATIVE_INFINITE
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end
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it "returns positive zero if BigDecimal equals positive zero" do
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BigDecimal("0").sign.should == BigDecimal::SIGN_POSITIVE_ZERO
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BigDecimal("0E-200000000").sign.should == BigDecimal::SIGN_POSITIVE_ZERO
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BigDecimal("0E200000000").sign.should == BigDecimal::SIGN_POSITIVE_ZERO
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end
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it "returns negative zero if BigDecimal equals negative zero" do
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BigDecimal("-0").sign.should == BigDecimal::SIGN_NEGATIVE_ZERO
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BigDecimal("-0E-200000000").sign.should == BigDecimal::SIGN_NEGATIVE_ZERO
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BigDecimal("-0E200000000").sign.should == BigDecimal::SIGN_NEGATIVE_ZERO
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end
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it "returns BigDecimal::SIGN_NaN if BigDecimal is NaN" do
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BigDecimal("NaN").sign.should == BigDecimal::SIGN_NaN
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end
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end
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