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require_relative '../../../spec_helper'
require_relative '../fixtures/common'
describe "Process::Status.wait" do
ProcessSpecs.use_system_ruby(self)
before :all do
begin
leaked = Process.waitall
# Ruby-space should not see PIDs used by rjit
raise "subprocesses leaked before wait specs: #{leaked}" unless leaked.empty?
rescue NotImplementedError
end
end
it "returns a status with pid -1 if there are no child processes" do
Process::Status.wait.pid.should == -1
end
platform_is_not :windows do
it "returns a status with its child pid" do
pid = Process.spawn(ruby_cmd('exit'))
status = Process::Status.wait
status.should be_an_instance_of(Process::Status)
status.pid.should == pid
end
it "should not set $? to the Process::Status" do
pid = Process.spawn(ruby_cmd('exit'))
status = Process::Status.wait
$?.should_not equal(status)
end
it "should not change the value of $?" do
pid = Process.spawn(ruby_cmd('exit'))
Process.wait
status = $?
Process::Status.wait
status.should equal($?)
end
it "waits for any child process if no pid is given" do
pid = Process.spawn(ruby_cmd('exit'))
Process::Status.wait.pid.should == pid
-> { 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::Status.wait(pid2).pid.should == pid2
Process::Status.wait(pid1).pid.should == pid1
-> { Process.kill(0, pid1) }.should raise_error(Errno::ESRCH)
-> { 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::Status.wait(mock_int(pid1)).pid.should == pid1
-> { 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::Status.wait(0).pid.should == pid2
Process::Status.wait.pid.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::Status.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::Status.wait.pid.should == pid
end
it "always accepts flags=0" do
pid = Process.spawn(ruby_cmd('exit'))
Process::Status.wait(-1, 0).pid.should == pid
-> { Process.kill(0, pid) }.should raise_error(Errno::ESRCH)
end
end
end
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