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Diffstat (limited to 'spec/ruby/core/numeric/numerator_spec.rb')
-rw-r--r-- | spec/ruby/core/numeric/numerator_spec.rb | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/spec/ruby/core/numeric/numerator_spec.rb b/spec/ruby/core/numeric/numerator_spec.rb new file mode 100644 index 0000000000..4a20f8792a --- /dev/null +++ b/spec/ruby/core/numeric/numerator_spec.rb @@ -0,0 +1,33 @@ +require File.expand_path('../../../spec_helper', __FILE__) + +describe "Numeric#numerator" do + before :all do + @numbers = [ + 0, + 29871, + 99999999999999**99, + -72628191273, + 29282.2827, + -2927.00091, + 0.0, + 12.0, + Float::MAX, + ] + end + + # This isn't entirely true, as NaN.numerator works, whereas + # Rational(NaN) raises an exception, but we test this in Float#numerator + it "converts self to a Rational object then returns its numerator" do + @numbers.each do |number| + number.numerator.should == Rational(number).numerator + end + end + + it "works with Numeric subclasses" do + rational = mock_numeric('rational') + rational.should_receive(:numerator).and_return(:numerator) + numeric = mock_numeric('numeric') + numeric.should_receive(:to_r).and_return(rational) + numeric.numerator.should == :numerator + end +end |