#!/usr/bin/python
#
#Brian Wright  bwright5@vt.edu
#
# Reverse Echo test
# Tests 3 cases:   valid string, single char, null input
#
#This file needs to be declared in plugins.tst and located in the plugins directory
#
import sys, imp, atexit, mmap
sys.path.append("/home/courses/cs3214/software/pexpect-dpty/");
import pexpect, shellio, signal, time, os, re, proc_check

#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]
plugin_dir = sys.argv[2]
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 + plugin_dir, drainpty=True, logfile=logfile)

atexit.register(force_shell_termination, shell_process=c)

c.sendline("touch log")
#make sure file exists in time
time.sleep(5)
# set timeout for all following 'expect*' calls to 2 seconds
c.timeout = 2
#create log file

# run commands through a child process
child = pexpect.spawn("./esh -p plugins")
#redirect output to a log file
with open("log","r+")as log_file:
	child.logfile = log_file
	child.send("recho abcdef\n")    #run 3 cases of recho to test full functionality
	child.expect(".*")
	child.send("recho a\n")
	child.expect(".*")
	child.send("recho \n")
	child.expect(".*")
	child.send("\n") # just send a command to cmd prompt to allow recho to run
	child.expect(".*")
	a = open("log").read() # grab string for file
	#test that strings are found for each case in valid locations
	case1 = a.find("Reversed!: fedcba") != -1
	case2 =  a.find("Reversed!: a ") != -1
	case3 = a.find("Need to type a string to reverse :(") != -1
	assert case1
	assert case2    #lame
	assert case3
	#assert a.find("Reversed!: fedcba \n") != -1  # FAILS WHY??? 
	#assert a.find("Reversed!: a \n") != -1
	#assert a.find("Need") != -1
assert log_file.closed
#make sure file closed
time.sleep(2)
os.remove("log")

shellio.success()