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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
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