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#!/usr/bin/python

#

# Ctrl-C Test: Start a shell, send SIGINT, run a program, 

#              send SIGINT, then exit

#

# Requires the following commands to be implemented

# or otherwise usable:

#

#	sleep, ctrl-c control

#

import sys, imp, atexit

sys.path.append("/home/courses/cs3214/software/pexpect-dpty/");

import pexpect, proc_check, shellio, signal, time, threading

#Ensure the shell process is terminated

def force_shell_termination(shell_process):

	c.close(force=True)

#pulling in the regular expression and other definitions

definitions_scriptname = sys.argv[1]

def_module = imp.load_source('', definitions_scriptname)

logfile = None

if hasattr(def_module, 'logfile'):

    logfile = def_module.logfile

# spawn an instance of the shell

c = pexpect.spawn(def_module.shell, drainpty=True, logfile=logfile)

atexit.register(force_shell_termination, shell_process=c)

# set timeout for all following 'expect*' calls to 2 seconds

c.timeout = 2

# ensure that shell prints expected prompt

assert c.expect(def_module.prompt) == 0, "Shell did not print expected prompt"

# run a command

c.sendline("sleep 60")

# The following call is necessary to ensure that the SIGINT

# we are sending below reaches the 'sleep' child.

# This is NOT a bullet-proof fix, you may fail on occasion!

time.sleep(1)

#checks that our process is running

proc_check.count_active_children(c, 1)

# send SIGINT

c.sendintr()

#prompt check

assert c.expect(def_module.prompt) == 0, "Shell did not print expected prompt"

#checks that the process was ended

proc_check.count_active_children(c, 0)

c.sendline("exit")

assert c.expect_exact("exit\r\n") == 0, "Shell output extraneous characters"

shellio.success()