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# -*- encoding: utf-8 -*-
require_relative '../../spec_helper'
require_relative 'fixtures/classes'
require_relative 'shared/readlines'
describe "IO.foreach" do
before :each do
@name = fixture __FILE__, "lines.txt"
@count = 0
ScratchPad.record []
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
cmd = "|sh -c 'echo hello;echo line2'"
platform_is :windows do
cmd = "|cmd.exe /C echo hello&echo line2"
end
suppress_warning do # https://bugs.ruby-lang.org/issues/19630
IO.foreach(cmd) { |l| ScratchPad << l }
end
ScratchPad.recorded.should == ["hello\n", "line2\n"]
end
platform_is_not :windows do
it "gets data from a fork when passed -" do
parent_pid = $$
suppress_warning do # https://bugs.ruby-lang.org/issues/19630
IO.foreach("|-") { |l| ScratchPad << l }
end
if $$ == parent_pid
ScratchPad.recorded.should == ["hello\n", "from a fork\n"]
else # child
puts "hello"
puts "from a fork"
exit!
end
end
end
ruby_version_is "3.3" do
# https://bugs.ruby-lang.org/issues/19630
it "warns about deprecation given a path with a pipe" do
cmd = "|echo ok"
-> {
IO.foreach(cmd).to_a
}.should complain(/IO process creation with a leading '\|'/)
end
end
end
end
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
describe "when no block is given" do
it "returns an Enumerator" do
IO.foreach(@name).should be_an_instance_of(Enumerator)
IO.foreach(@name).to_a.should == IOSpecs.lines
end
describe "returned Enumerator" do
describe "size" do
it "should return nil" do
IO.foreach(@name).size.should == nil
end
end
end
end
it_behaves_like :io_readlines, :foreach, IOSpecs.collector
it_behaves_like :io_readlines_options_19, :foreach, IOSpecs.collector
end
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