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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
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