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require_relative '../../spec_helper'
require_relative 'fixtures/classes'
describe "Kernel.loop" do
it "is a private method" do
Kernel.should have_private_instance_method(:loop)
end
it "calls block until it is terminated by a break" do
i = 0
loop do
i += 1
break if i == 10
end
i.should == 10
end
it "returns value passed to break" do
loop do
break 123
end.should == 123
end
it "returns nil if no value passed to break" do
loop do
break
end.should == nil
end
it "returns an enumerator if no block given" do
enum = loop
enum.instance_of?(Enumerator).should be_true
cnt = 0
enum.each do |*args|
raise "Args should be empty #{args.inspect}" unless args.empty?
cnt += 1
break cnt if cnt >= 42
end.should == 42
end
it "rescues StopIteration" do
loop do
raise StopIteration
end
42.should == 42
end
it "rescues StopIteration's subclasses" do
finish = Class.new StopIteration
loop do
raise finish
end
42.should == 42
end
it "does not rescue other errors" do
lambda{ loop do raise StandardError end }.should raise_error( StandardError )
end
ruby_version_is "2.3" do
it "returns StopIteration#result, the result value of a finished iterator" do
e = Enumerator.new { |y|
y << 1
y << 2
:stopped
}
loop { e.next }.should == :stopped
end
end
describe "when no block is given" do
describe "returned Enumerator" do
describe "size" do
it "returns Float::INFINITY" do
loop.size.should == Float::INFINITY
end
end
end
end
end
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