#!/usr/bin/python
#
# Tests the functionality of gback's glob module
#
# This functions as a template for your own tests.
#
# Written for CS 3214 Spring 2015.
#
# To run this test on your own shell, simply run:
#
# /web/courses/cs3214/spring2015/projects/student-plugins/gback/glob/gback_glob_test.py eshoutput.py
#
# from the directory in which your "esh" and your "eshoutput.py" is located.
# It should also be possible to make a copy of that file anywhere, as long as the
# 'glob.so' file is located within the same directory.
#
# @author gback
#
import sys, imp, atexit, os
sys.path.append("/home/courses/cs3214/software/pexpect-dpty/");
import pexpect, shellio, signal, time, os, re, proc_check

# Determine the path this file is in
thisdir = os.path.dirname(os.path.realpath(__file__))

#Ensure the shell process is terminated
def force_shell_termination(shell_process):
	c.close(force=True)

# pulling in the regular expression and other definitions
# this should be the eshoutput.py file of the hosting shell, see usage above
definitions_scriptname = sys.argv[1]
def_module = imp.load_source('', definitions_scriptname)

# you can define logfile=open("log.txt", "w") in your eshoutput.py if you want logging!
logfile = None
if hasattr(def_module, 'logfile'):
    logfile = def_module.logfile

#spawn an instance of the shell, note the -p flags
c = pexpect.spawn(def_module.shell,  drainpty=True, logfile=logfile, args=['-p', thisdir])

atexit.register(force_shell_termination, shell_process=c)

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

#############################################################################
# Now the real test starts!
#

# ensure that shell prints expected prompt
assert c.expect(def_module.prompt) == 0, "Shell did not print expected prompt (1)" 

#################################################################
# Step 1. Create a temporary directory and put a few files in it
# 
#
import tempfile, shutil
tmpdir = tempfile.mkdtemp("esh")
testfiles = ['aa', 'ab', 'c']
for file in testfiles:
    open(tmpdir + "/" + file, "w")

# make sure it gets cleaned up on exit
def cleanup():
    shutil.rmtree(tmpdir)

atexit.register(cleanup)

expectedoutput = " ".join(tmpdir + "/" + f for f in testfiles)

#################################################################
# Step 2. Run echo with a glob
#
# run echo
c.sendline("echo " + tmpdir + "/*");

assert c.expect_exact(expectedoutput) == 0, \
    "expected glob expansion %s" % (expectedoutput)

#################################################################
# Test glob expansion at the end of the word

# ensure that shell prints expected prompt
assert c.expect(def_module.prompt) == 0, "Shell did not print expected prompt (3)" 

#################################################################
# Step 3. Run echo with a glob a*
#
c.sendline("echo %s/a*" % (tmpdir))

expectedoutput = " ".join(tmpdir + "/" + f for f in testfiles if f.startswith("a"))
assert c.expect_exact(expectedoutput) == 0, "echo a* does not work correctly"

shellio.success()