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-rw-r--r--spec/ruby/core/io/popen_spec.rb285
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diff --git a/spec/ruby/core/io/popen_spec.rb b/spec/ruby/core/io/popen_spec.rb
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+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+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('foo') }.should raise_error(IOError)
+ 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
+
+ with_feature :fork 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
+
+ with_feature :encoding do
+ 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
+ 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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