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Contents
require File.dirname(File.join(__rhoGetCurrentDir(), __FILE__)) + '/../../spec_helper'
require File.dirname(File.join(__rhoGetCurrentDir(), __FILE__)) + '/fixtures/classes'
describe "Enumerable#cycle" do
ruby_version_is '1.8.7' do
it "loops indefinitely if no argument or nil argument" do
[[],[nil]].each do |args|
bomb = 10
EnumerableSpecs::Numerous.new.cycle(*args) do
bomb -= 1
break 42 if bomb <= 0
end.should == 42
bomb.should == 0
end
end
describe "passed a number n as an argument" do
it "returns nil and does nothing for non positive n" do
EnumerableSpecs::ThrowingEach.new.cycle(0){}.should be_nil
EnumerableSpecs::NoEach.new.cycle(-22){}.should be_nil
end
it "calls each at most once" do
enum = EnumerableSpecs::EachCounter.new(1, 2)
enum.cycle(3).to_a.should == [1,2,1,2,1,2]
enum.times_called.should == 1
end
it "yields only when necessary" do
enum = EnumerableSpecs::EachCounter.new(10, 20, 30)
enum.cycle(3){|x| break if x == 20}
enum.times_yielded.should == 2
end
it "tries to convert n to an Integer using #to_int" do
enum = EnumerableSpecs::Numerous.new(3, 2, 1)
enum.cycle(2.3).to_a.should == [3, 2, 1, 3, 2, 1]
obj = mock('to_int')
obj.should_receive(:to_int).and_return(2)
enum.cycle(obj).to_a.should == [3, 2, 1, 3, 2, 1]
end
it "raises a TypeError when the passed n can be coerced to Integer" do
enum = EnumerableSpecs::Numerous.new
lambda{ enum.cycle("cat"){} }.should raise_error(TypeError)
end
it "raises an ArgumentError if more arguments are passed" do
enum = EnumerableSpecs::Numerous.new
lambda{ enum.cycle(1, 2){} }.should raise_error(ArgumentError)
end
end
end
end
Version data entries
83 entries across 83 versions & 1 rubygems