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require_relative '../../spec_helper'
require_relative 'fixtures/classes'
describe "IO.popen" do
before :each do
@io = nil
end
after :each do
@io.close if @io
end
it "returns an open IO" do
@io = IO.popen(ruby_cmd('exit'), "r")
@io.closed?.should be_false
end
it "reads a read-only pipe" do
@io = IO.popen(ruby_cmd('puts "foo"'), "r")
@io.read.should == "foo\n"
end
it "raises IOError when writing a read-only pipe" do
@io = IO.popen(ruby_cmd('puts "foo"'), "r")
lambda { @io.write('bar') }.should raise_error(IOError)
@io.read.should == "foo\n"
end
end
describe "IO.popen" do
before :each do
@fname = tmp("IO_popen_spec")
@io = nil
end
after :each do
@io.close if @io and !@io.closed?
rm_r @fname
end
it "sees an infinitely looping subprocess exit when read pipe is closed" do
io = IO.popen ruby_cmd('r = loop{puts "y"; 0} rescue 1; exit r'), 'r'
io.close
$?.exitstatus.should_not == 0
end
it "writes to a write-only pipe" do
@io = IO.popen(ruby_cmd('IO.copy_stream(STDIN,STDOUT)', args: "> #{@fname}"), "w")
@io.write("bar")
@io.close
File.read(@fname).should == "bar"
end
it "raises IOError when reading a write-only pipe" do
@io = IO.popen(ruby_cmd('IO.copy_stream(STDIN,STDOUT)'), "w")
lambda { @io.read }.should raise_error(IOError)
end
it "reads and writes a read/write pipe" do
@io = IO.popen(ruby_cmd('IO.copy_stream(STDIN,STDOUT)'), "r+")
@io.write("bar")
@io.read(3).should == "bar"
end
it "waits for the child to finish" do
@io = IO.popen(ruby_cmd('IO.copy_stream(STDIN,STDOUT)', args: "> #{@fname}"), "w")
@io.write("bar")
@io.close
$?.exitstatus.should == 0
File.read(@fname).should == "bar"
end
it "does not throw an exception if child exited and has been waited for" do
@io = IO.popen([*ruby_exe, '-e', 'sleep'])
pid = @io.pid
Process.kill "KILL", pid
@io.close
platform_is_not :windows do
$?.signaled?.should == true
end
platform_is :windows do
$?.exited?.should == true
end
end
it "returns an instance of a subclass when called on a subclass" do
@io = IOSpecs::SubIO.popen(ruby_cmd('exit'), "r")
@io.should be_an_instance_of(IOSpecs::SubIO)
end
it "coerces mode argument with #to_str" do
mode = mock("mode")
mode.should_receive(:to_str).and_return("r")
@io = IO.popen(ruby_cmd('exit 0'), mode)
end
end
describe "IO.popen" do
before :each do
@io = nil
end
after :each do
@io.close if @io
end
describe "with a block" do
it "yields an open IO to the block" do
IO.popen(ruby_cmd('exit'), "r") do |io|
io.closed?.should be_false
end
end
it "yields an instance of a subclass when called on a subclass" do
IOSpecs::SubIO.popen(ruby_cmd('exit'), "r") do |io|
io.should be_an_instance_of(IOSpecs::SubIO)
end
end
it "closes the IO after yielding" do
io = IO.popen(ruby_cmd('exit'), "r") { |_io| _io }
io.closed?.should be_true
end
it "allows the IO to be closed inside the block" do
io = IO.popen(ruby_cmd('exit'), 'r') { |_io| _io.close; _io }
io.closed?.should be_true
end
it "returns the value of the block" do
IO.popen(ruby_cmd('exit'), "r") { :hello }.should == :hello
end
end
platform_is_not :windows do
it "starts returns a forked process if the command is -" do
io = IO.popen("-")
if io # parent
begin
io.gets.should == "hello from child\n"
ensure
io.close
end
else # child
puts "hello from child"
exit!
end
end
end
it "has the given external encoding" do
@io = IO.popen(ruby_cmd('exit'), external_encoding: Encoding::EUC_JP)
@io.external_encoding.should == Encoding::EUC_JP
end
it "has the given internal encoding" do
@io = IO.popen(ruby_cmd('exit'), internal_encoding: Encoding::EUC_JP)
@io.internal_encoding.should == Encoding::EUC_JP
end
it "sets the internal encoding to nil if it's the same as the external encoding" do
@io = IO.popen(ruby_cmd('exit'), external_encoding: Encoding::EUC_JP,
internal_encoding: Encoding::EUC_JP)
@io.internal_encoding.should be_nil
end
context "with a leading ENV Hash" do
it "accepts a single String command" do
IO.popen({"FOO" => "bar"}, ruby_cmd('puts ENV["FOO"]')) do |io|
io.read.should == "bar\n"
end
end
it "accepts a single String command, and an IO mode" do
IO.popen({"FOO" => "bar"}, ruby_cmd('puts ENV["FOO"]'), "r") do |io|
io.read.should == "bar\n"
end
end
it "accepts a single String command with a trailing Hash of Process.exec options" do
IO.popen({"FOO" => "bar"}, ruby_cmd('STDERR.puts ENV["FOO"]'),
err: [:child, :out]) do |io|
io.read.should == "bar\n"
end
end
it "accepts a single String command with a trailing Hash of Process.exec options, and an IO mode" do
IO.popen({"FOO" => "bar"}, ruby_cmd('STDERR.puts ENV["FOO"]'), "r",
err: [:child, :out]) do |io|
io.read.should == "bar\n"
end
end
it "accepts an Array of command and arguments" do
exe, *args = ruby_exe
IO.popen({"FOO" => "bar"}, [[exe, "specfu"], *args, "-e", "puts ENV['FOO']"]) do |io|
io.read.should == "bar\n"
end
end
it "accepts an Array of command and arguments, and an IO mode" do
exe, *args = ruby_exe
IO.popen({"FOO" => "bar"}, [[exe, "specfu"], *args, "-e", "puts ENV['FOO']"], "r") do |io|
io.read.should == "bar\n"
end
end
it "accepts an Array command with a separate trailing Hash of Process.exec options" do
IO.popen({"FOO" => "bar"}, [*ruby_exe, "-e", "STDERR.puts ENV['FOO']"],
err: [:child, :out]) do |io|
io.read.should == "bar\n"
end
end
it "accepts an Array command with a separate trailing Hash of Process.exec options, and an IO mode" do
IO.popen({"FOO" => "bar"}, [*ruby_exe, "-e", "STDERR.puts ENV['FOO']"],
"r", err: [:child, :out]) do |io|
io.read.should == "bar\n"
end
end
end
context "with a leading Array argument" do
it "uses the Array as command plus args for the child process" do
IO.popen([*ruby_exe, "-e", "puts 'hello'"]) do |io|
io.read.should == "hello\n"
end
end
it "accepts a leading ENV Hash" do
IO.popen([{"FOO" => "bar"}, *ruby_exe, "-e", "puts ENV['FOO']"]) do |io|
io.read.should == "bar\n"
end
end
it "accepts a trailing Hash of Process.exec options" do
IO.popen([*ruby_exe, "does_not_exist", {err: [:child, :out]}]) do |io|
io.read.should =~ /LoadError/
end
end
it "accepts an IO mode argument following the Array" do
IO.popen([*ruby_exe, "does_not_exist", {err: [:child, :out]}], "r") do |io|
io.read.should =~ /LoadError/
end
end
it "accepts [env, command, arg1, arg2, ..., exec options]" do
IO.popen([{"FOO" => "bar"}, *ruby_exe, "-e", "STDERR.puts ENV[:FOO.to_s]",
err: [:child, :out]]) do |io|
io.read.should == "bar\n"
end
end
it "accepts '[env, command, arg1, arg2, ..., exec options], mode'" do
IO.popen([{"FOO" => "bar"}, *ruby_exe, "-e", "STDERR.puts ENV[:FOO.to_s]",
err: [:child, :out]], "r") do |io|
io.read.should == "bar\n"
end
end
it "accepts '[env, command, arg1, arg2, ..., exec options], mode, IO options'" do
IO.popen([{"FOO" => "bar"}, *ruby_exe, "-e", "STDERR.puts ENV[:FOO.to_s]",
err: [:child, :out]], "r",
internal_encoding: Encoding::EUC_JP) do |io|
io.read.should == "bar\n"
io.internal_encoding.should == Encoding::EUC_JP
end
end
it "accepts '[env, command, arg1, arg2, ...], mode, IO + exec options'" do
IO.popen([{"FOO" => "bar"}, *ruby_exe, "-e", "STDERR.puts ENV[:FOO.to_s]"], "r",
err: [:child, :out], internal_encoding: Encoding::EUC_JP) do |io|
io.read.should == "bar\n"
io.internal_encoding.should == Encoding::EUC_JP
end
end
end
end
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