mirror of
https://github.com/ruby/ruby.git
synced 2022-11-09 12:17:21 -05:00
37 lines
1.7 KiB
Ruby
37 lines
1.7 KiB
Ruby
|
require File.expand_path('../../../spec_helper', __FILE__)
|
||
|
|
require 'bigdecimal'
|
||
|
|
|
||
|
|
describe "BigDecimal.mode" do
|
||
|
|
#the default value of BigDecimal exception constants is false
|
||
|
|
after :each do
|
||
|
|
BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false)
|
||
|
|
BigDecimal.mode(BigDecimal::EXCEPTION_INFINITY, false)
|
||
|
|
BigDecimal.mode(BigDecimal::EXCEPTION_UNDERFLOW, false)
|
||
|
|
BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false)
|
||
|
|
BigDecimal.mode(BigDecimal::EXCEPTION_ZERODIVIDE, false)
|
||
|
|
end
|
||
|
|
|
||
|
|
it "returns the appropriate value and continue the computation if the flag is false" do
|
||
|
|
BigDecimal("NaN").add(BigDecimal("1"),0).nan?.should == true
|
||
|
|
BigDecimal("0").add(BigDecimal("Infinity"),0).should == BigDecimal("Infinity")
|
||
|
|
BigDecimal("1").quo(BigDecimal("0")).should == BigDecimal("Infinity")
|
||
|
|
end
|
||
|
|
|
||
|
|
it "returns Infinity when too big" do
|
||
|
|
BigDecimal("1E11111111111111111111").should == BigDecimal("Infinity")
|
||
|
|
(BigDecimal("1E1000000000000000000")**10).should == BigDecimal("Infinity")
|
||
|
|
end
|
||
|
|
|
||
|
|
it "raise an exception if the flag is true" do
|
||
|
|
BigDecimal.mode(BigDecimal::EXCEPTION_NaN, true)
|
||
|
|
lambda { BigDecimal("NaN").add(BigDecimal("1"),0) }.should raise_error(FloatDomainError)
|
||
|
|
BigDecimal.mode(BigDecimal::EXCEPTION_INFINITY, true)
|
||
|
|
lambda { BigDecimal("0").add(BigDecimal("Infinity"),0) }.should raise_error(FloatDomainError)
|
||
|
|
BigDecimal.mode(BigDecimal::EXCEPTION_ZERODIVIDE, true)
|
||
|
|
lambda { BigDecimal("1").quo(BigDecimal("0")) }.should raise_error(FloatDomainError)
|
||
|
|
BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, true)
|
||
|
|
lambda { BigDecimal("1E11111111111111111111") }.should raise_error(FloatDomainError)
|
||
|
|
lambda { (BigDecimal("1E1000000000000000000")**10) }.should raise_error(FloatDomainError)
|
||
|
|
end
|
||
|
|
end
|