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require File.expand_path('../../../spec_helper', __FILE__)
require 'bigdecimal'
describe "BigDecimal#precs" do
before(:each) do
@infinity = BigDecimal("Infinity")
@infinity_neg = BigDecimal("-Infinity")
@nan = BigDecimal("NaN")
@zero = BigDecimal("0")
@zero_neg = BigDecimal("-0")
@arr = [BigDecimal("2E40001"), BigDecimal("3E-20001"),\
@infinity, @infinity_neg, @nan, @zero, @zero_neg]
@precision = BigDecimal::BASE.to_s.length - 1
end
it "returns array of two values" do
@arr.each do |x|
x.precs.kind_of?(Array).should == true
x.precs.size.should == 2
end
end
it "returns Integers as array values" do
@arr.each do |x|
x.precs[0].kind_of?(Integer).should == true
x.precs[1].kind_of?(Integer).should == true
end
end
it "returns the current value of significant digits as the first value" do
BigDecimal("3.14159").precs[0].should >= 6
BigDecimal('1').precs[0].should == BigDecimal('1' + '0' * 100).precs[0]
[@infinity, @infinity_neg, @nan, @zero, @zero_neg].each do |value|
value.precs[0].should <= @precision
end
end
it "returns the maximum number of significant digits as the second value" do
BigDecimal("3.14159").precs[1].should >= 6
BigDecimal('1').precs[1].should >= 1
BigDecimal('1' + '0' * 100).precs[1] >= 101
[@infinity, @infinity_neg, @nan, @zero, @zero_neg].each do |value|
value.precs[1].should >= 1
end
end
end
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