diff options
Diffstat (limited to 'spec/rubyspec/library/bigdecimal/mode_spec.rb')
-rw-r--r-- | spec/rubyspec/library/bigdecimal/mode_spec.rb | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/spec/rubyspec/library/bigdecimal/mode_spec.rb b/spec/rubyspec/library/bigdecimal/mode_spec.rb new file mode 100644 index 0000000000..d88ac61aaf --- /dev/null +++ b/spec/rubyspec/library/bigdecimal/mode_spec.rb @@ -0,0 +1,36 @@ +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 |