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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63293 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
79 lines
1.6 KiB
Ruby
79 lines
1.6 KiB
Ruby
require_relative '../../spec_helper'
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require_relative 'fixtures/classes'
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describe "Kernel.loop" do
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it "is a private method" do
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Kernel.should have_private_instance_method(:loop)
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end
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it "calls block until it is terminated by a break" do
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i = 0
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loop do
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i += 1
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break if i == 10
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end
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i.should == 10
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end
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it "returns value passed to break" do
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loop do
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break 123
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end.should == 123
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end
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it "returns nil if no value passed to break" do
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loop do
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break
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end.should == nil
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end
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it "returns an enumerator if no block given" do
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enum = loop
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enum.instance_of?(Enumerator).should be_true
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cnt = 0
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enum.each do |*args|
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raise "Args should be empty #{args.inspect}" unless args.empty?
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cnt += 1
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break cnt if cnt >= 42
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end.should == 42
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end
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it "rescues StopIteration" do
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loop do
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raise StopIteration
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end
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42.should == 42
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end
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it "rescues StopIteration's subclasses" do
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finish = Class.new StopIteration
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loop do
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raise finish
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end
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42.should == 42
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end
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it "does not rescue other errors" do
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lambda{ loop do raise StandardError end }.should raise_error( StandardError )
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end
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it "returns StopIteration#result, the result value of a finished iterator" do
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e = Enumerator.new { |y|
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y << 1
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y << 2
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:stopped
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}
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loop { e.next }.should == :stopped
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end
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describe "when no block is given" do
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describe "returned Enumerator" do
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describe "size" do
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it "returns Float::INFINITY" do
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loop.size.should == Float::INFINITY
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end
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end
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end
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end
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end
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