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require_relative '../../spec_helper'
require_relative 'fixtures/common'
describe "Process.wait" do
ProcessSpecs.use_system_ruby(self)
before :all do
begin
leaked = Process.waitall
puts "leaked before wait specs: #{leaked}" unless leaked.empty?
with_feature :mjit do
# Ruby-space should not see PIDs used by mjit
leaked.should be_empty
end
rescue NotImplementedError
end
end
it "raises an Errno::ECHILD if there are no child processes" do
lambda { Process.wait }.should raise_error(Errno::ECHILD)
end
platform_is_not :windows do
it "returns its child pid" do
pid = Process.spawn(ruby_cmd('exit'))
Process.wait.should == pid
end
it "sets $? to a Process::Status" do
pid = Process.spawn(ruby_cmd('exit'))
Process.wait
$?.should be_kind_of(Process::Status)
$?.pid.should == pid
end
it "waits for any child process if no pid is given" do
pid = Process.spawn(ruby_cmd('exit'))
Process.wait.should == pid
lambda { Process.kill(0, pid) }.should raise_error(Errno::ESRCH)
end
it "waits for a specific child if a pid is given" do
pid1 = Process.spawn(ruby_cmd('exit'))
pid2 = Process.spawn(ruby_cmd('exit'))
Process.wait(pid2).should == pid2
Process.wait(pid1).should == pid1
lambda { Process.kill(0, pid1) }.should raise_error(Errno::ESRCH)
lambda { Process.kill(0, pid2) }.should raise_error(Errno::ESRCH)
end
it "coerces the pid to an Integer" do
pid1 = Process.spawn(ruby_cmd('exit'))
Process.wait(mock_int(pid1)).should == pid1
lambda { Process.kill(0, pid1) }.should raise_error(Errno::ESRCH)
end
# This spec is probably system-dependent.
it "waits for a child whose process group ID is that of the calling process" do
pid1 = Process.spawn(ruby_cmd('exit'), pgroup: true)
pid2 = Process.spawn(ruby_cmd('exit'))
Process.wait(0).should == pid2
Process.wait.should == pid1
end
# This spec is probably system-dependent.
it "doesn't block if no child is available when WNOHANG is used" do
read, write = IO.pipe
pid = Process.fork do
read.close
Signal.trap("TERM") { Process.exit! }
write << 1
write.close
sleep
end
Process.wait(pid, Process::WNOHANG).should be_nil
# wait for the child to setup its TERM handler
write.close
read.read(1)
read.close
Process.kill("TERM", pid)
Process.wait.should == pid
end
it "always accepts flags=0" do
pid = Process.spawn(ruby_cmd('exit'))
Process.wait(-1, 0).should == pid
lambda { Process.kill(0, pid) }.should raise_error(Errno::ESRCH)
end
end
end
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