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require File.expand_path('../../../spec_helper', __FILE__)
require 'bigdecimal'
describe "BigDecimal#sign" do
it "defines several constants for signs" do
# are these really correct?
BigDecimal::SIGN_POSITIVE_INFINITE.should == 3
BigDecimal::SIGN_NEGATIVE_INFINITE.should == -3
BigDecimal::SIGN_POSITIVE_ZERO.should == 1
BigDecimal::SIGN_NEGATIVE_ZERO.should == -1
BigDecimal::SIGN_POSITIVE_FINITE.should == 2
BigDecimal::SIGN_NEGATIVE_FINITE.should == -2
end
it "returns positive value if BigDecimal greater than 0" do
BigDecimal("1").sign.should == BigDecimal::SIGN_POSITIVE_FINITE
BigDecimal("1E-20000000").sign.should == BigDecimal::SIGN_POSITIVE_FINITE
BigDecimal("1E200000000").sign.should == BigDecimal::SIGN_POSITIVE_FINITE
BigDecimal("Infinity").sign.should == BigDecimal::SIGN_POSITIVE_INFINITE
end
it "returns negative value if BigDecimal less than 0" do
BigDecimal("-1").sign.should == BigDecimal::SIGN_NEGATIVE_FINITE
BigDecimal("-1E-9990000").sign.should == BigDecimal::SIGN_NEGATIVE_FINITE
BigDecimal("-1E20000000").sign.should == BigDecimal::SIGN_NEGATIVE_FINITE
BigDecimal("-Infinity").sign.should == BigDecimal::SIGN_NEGATIVE_INFINITE
end
it "returns positive zero if BigDecimal equals positive zero" do
BigDecimal("0").sign.should == BigDecimal::SIGN_POSITIVE_ZERO
BigDecimal("0E-200000000").sign.should == BigDecimal::SIGN_POSITIVE_ZERO
BigDecimal("0E200000000").sign.should == BigDecimal::SIGN_POSITIVE_ZERO
end
it "returns negative zero if BigDecimal equals negative zero" do
BigDecimal("-0").sign.should == BigDecimal::SIGN_NEGATIVE_ZERO
BigDecimal("-0E-200000000").sign.should == BigDecimal::SIGN_NEGATIVE_ZERO
BigDecimal("-0E200000000").sign.should == BigDecimal::SIGN_NEGATIVE_ZERO
end
it "returns BigDecimal::SIGN_NaN if BigDecimal is NaN" do
BigDecimal("NaN").sign.should == BigDecimal::SIGN_NaN
end
end
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