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require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../shared/power', __FILE__)
require 'bigdecimal'
describe "BigDecimal#**" do
it_behaves_like(:bigdecimal_power, :**)
end
describe "BigDecimal#exponent" do
it "returns an Integer" do
BigDecimal("2E100000000").exponent.kind_of?(Integer).should == true
BigDecimal("2E-999").exponent.kind_of?(Integer).should == true
end
it "is n if number can be represented as 0.xxx*10**n" do
BigDecimal("2E1000").exponent.should == 1001
BigDecimal("1234567E10").exponent.should == 17
end
# commenting this spec out after discussion with Defiler, since it seems to be an MRI bug, not a real feature
=begin
platform_is :wordsize => 32 do
# TODO: write specs for both 32 and 64 bit
it "returns 0 if exponent can't be represented as Fixnum" do
BigDecimal("2E1000000000000000").exponent.should == 0
BigDecimal("-5E-999999999999999").exponent.should == 0
end
end
=end
it "returns 0 if self is 0" do
BigDecimal("0").exponent.should == 0
BigDecimal("+0").exponent.should == 0
BigDecimal("-0").exponent.should == 0
end
end
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