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require File.expand_path('../../../spec_helper', __FILE__)
require 'rational'
describe :rational_div_rat, :shared => true do
it "performs integer division and returns the result" do
Rational(2, 3).div(Rational(2, 3)).should == 1
Rational(-2, 9).div(Rational(-9, 2)).should == 0
end
it "raises a ZeroDivisionError when the argument has a numerator of 0" do
lambda { Rational(3, 4).div(Rational(0, 3)) }.should raise_error(ZeroDivisionError)
end
# 1.8 doesn't accept Floats for Rational() arguments
ruby_version_is "1.9" do
it "raises a ZeroDivisionError when the argument has a numerator of 0.0" do
lambda { Rational(3, 4).div(Rational(0.0, 3)) }.should raise_error(ZeroDivisionError)
end
end
end
describe :rational_div_float, :shared => true do
# The version guard is necessary because 1.8 can't cope with Floats passed
# to Rational(), so we need to simplify the examples accordingly.
ruby_version_is "1.9" do
it "performs integer division and returns the result" do
Rational(2, 3).div(30.333).should == 0
Rational(2, 9).div(Rational(-8.6)).should == -1
Rational(3.12).div(0.5).should == 6
end
end
ruby_version_is ""..."1.9" do
it "performs integer division and returns the result" do
Rational(2, 3).div(30.333).should == 0
Rational(7, 12).div(0.5).should == 1
end
end
ruby_version_is ""..."1.9" do
it "raises a FloatDomainError when the argument is 0.0" do
lambda { Rational(3, 4).div(0.0) }.should raise_error(FloatDomainError)
end
end
ruby_version_is "1.9" do
it "raises a ZeroDivisionError when the argument is 0.0" do
lambda { Rational(3, 4).div(0.0) }.should raise_error(ZeroDivisionError)
end
end
end
describe :rational_div_int, :shared => true do
it "performs integer division and returns the result" do
Rational(2, 1).div(1).should == 2
Rational(25, 5).div(-50).should == -1
end
it "raises a ZeroDivisionError when the argument is 0" do
lambda { Rational(3, 4).div(0) }.should raise_error(ZeroDivisionError)
end
end
describe :rational_div, :shared => true do
it "returns an Integer" do
Rational(229, 21).div(82).should be_kind_of(Integer)
end
it "raises an ArgumentError if passed more than one argument" do
lambda { Rational(3, 4).div(2,3) }.should raise_error(ArgumentError)
end
# See http://redmine.ruby-lang.org/issues/show/1648
ruby_version_is "1.8.8" do
it "raises a TypeError if passed a non-numeric argument" do
lambda { Rational(3, 4).div([]) }.should raise_error(TypeError)
end
end
end
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