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# -*- encoding: utf-8 -*-
require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)
require File.expand_path('../shared/readlines', __FILE__)
describe "IO.foreach" do
before :each do
@name = fixture __FILE__, "lines.txt"
@count = 0
ScratchPad.record []
end
ruby_version_is "1.8.7" do
it "returns an Enumerator when called without a block" do
IO.foreach(@name).should be_an_instance_of(enumerator_class)
IO.foreach(@name).to_a.should == IOSpecs.lines
end
end
it "updates $. with each yield" do
IO.foreach(@name) { $..should == @count += 1 }
end
describe "when the filename starts with |" do
it "gets data from the standard out of the subprocess" do
IO.foreach("|sh -c 'echo hello;echo line2'") { |l| ScratchPad << l }
ScratchPad.recorded.should == ["hello\n", "line2\n"]
end
it "gets data from a fork when passed -" do
parent_pid = $$
ret = IO.foreach("|-") { |l| ScratchPad << l; true }
if $$ == parent_pid
ScratchPad.recorded.should == ["hello\n", "from a fork\n"]
else # child
puts "hello"
puts "from a fork"
exit!
end
end
end
end
ruby_version_is ""..."1.9" do
describe "IO.foreach" do
before :each do
@name = fixture __FILE__, "lines.txt"
ScratchPad.record []
end
it_behaves_like :io_readlines, :foreach, IOSpecs.collector
it_behaves_like :io_readlines_options_18, :foreach, IOSpecs.collector
end
end
ruby_version_is "1.9" do
describe "IO.foreach" do
before :each do
@external = Encoding.default_external
Encoding.default_external = Encoding::UTF_8
@name = fixture __FILE__, "lines.txt"
ScratchPad.record []
end
after :each do
Encoding.default_external = @external
end
it "sets $_ to nil" do
$_ = "test"
IO.foreach(@name) { }
$_.should be_nil
end
it_behaves_like :io_readlines, :foreach, IOSpecs.collector
it_behaves_like :io_readlines_options_19, :foreach, IOSpecs.collector
end
end
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