diff options
Diffstat (limited to 'spec/ruby/core/integer/rationalize_spec.rb')
-rw-r--r-- | spec/ruby/core/integer/rationalize_spec.rb | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/spec/ruby/core/integer/rationalize_spec.rb b/spec/ruby/core/integer/rationalize_spec.rb new file mode 100644 index 0000000000..1ff4cfa454 --- /dev/null +++ b/spec/ruby/core/integer/rationalize_spec.rb @@ -0,0 +1,39 @@ +require File.expand_path('../../../spec_helper', __FILE__) + +describe "Integer#rationalize" do + before :all do + @numbers = [ + 0, + 29871, + 99999999999999**99, + -72628191273, + ] + end + + it "returns a Rational object" do + @numbers.each do |number| + number.rationalize.should be_an_instance_of(Rational) + end + end + + it "uses self as the numerator" do + @numbers.each do |number| + number.rationalize.numerator.should == number + end + end + + it "uses 1 as the denominator" do + @numbers.each do |number| + number.rationalize.denominator.should == 1 + end + end + + it "ignores a single argument" do + 1.rationalize(0.1).should == Rational(1,1) + end + + it "raises ArgumentError when passed more than one argument" do + lambda { 1.rationalize(0.1, 0.1) }.should raise_error(ArgumentError) + lambda { 1.rationalize(0.1, 0.1, 2) }.should raise_error(ArgumentError) + end +end |