tests/ltp/ltp-diff.py

#!/usr/bin/python2.4
# (C) Copyright IBM Corp. 2006
# Author: Dustin Kirkland <dustin.kirkland@us.ibm.com>
# Description:
#  Input:  Two or more files containing results from different executions of
#          the LTP. The input can either be file names or the url location
#          of the ltp.results file.  
#  Output: A report on the following:
#	   - The total number of tests executed in each run
#	   - The testname, sequence number, and output of each run
#            where the results of those runs differ
#  Return:
#	   0 if all runs had identical results
#	   Non-zero if results differ, or bad input


import sys
import string
import re
import urllib

def usage():
	print "\nUsage: \n\
  ltp-diff results1 results2 ... locationN \n\
  Note: location[1,2,N] may be local files or URLs of LTP results\n"
	sys.exit(1)

def get_results(results_files):
	"""
	Download the results if needed.
	Return results of each run in a numerically-indexed dictionary
	of dictionaries keyed on testnames.
	Return dictionary keyed on unique testnames across all runs.
	"""
	r = re.compile('(\S+\s+\S+)\s+(\S+)\s+:')
	i = 0
	runs = {}
	testnames = {}
	for file in results_files:
		runs[i] = {}
		try:
			fh = urllib.urlopen(file)
			results = fh.readlines()
			fh.close()
		except:
			print "ERROR: reading results resource [%s]" % (file)
			usage()
		for line in results:
			try:
				s = r.match(line)
				testname = s.group(1)
				status = s.group(2)
				runs[i][testname] = status
				testnames[testname] = 1
			except:
				pass
		i += 1
	return (runs, testnames)



def compare_results(runs):
	""" 
	Loop through all testnames alpahbetically.
	Print any testnames with differing results across runs.
	Return 1 if any test results across runs differ.
	Return 0 if all test results match.
	"""
	rc = 0
	print "LTP Test Results to Compare"
	for i in range(len(runs)):
		print "  Run[%d]: %d" % (i, len(runs[i].keys()))
	print ""
	header = 0
	all_testnames = testnames.keys()
	all_testnames.sort()
	for testname in all_testnames:
		differ = 0
		for i in range(1,len(runs)):
			# Must handle testcases that executed in one run
			# but not another by setting status to "null"
			if not runs[i].has_key(testname):
				runs[i][testname] = "null"
			if not runs[i-1].has_key(testname):
				runs[i-i][testname] = "null"
			# Check for the results inconsistencies
			if runs[i][testname] != runs[i-1][testname]:
				differ = 1
		if differ:
			if header == 0:
				# Print the differences header only once
				print "Tests with Inconsistent Results across Runs"
				print "  %-35s:\t%s" % ("Testname,Sequence", "Run Results")
				header = 1

			# Print info if results differ
			rc = 1
			testname_cleaned = re.sub('\s+', ',', testname)
			print "  %-35s:\t" % (testname_cleaned),
			all_results = ""
			for i in range(len(runs)):
				all_results += runs[i][testname]
				if i+1<len(runs):
					all_results += "/"
			print all_results
	if rc == 0:
		print "All LTP results are identical"	
	return rc


########
# Main #
########
sys.argv.pop(0)
if (len(sys.argv) < 2):
	usage()
(runs, testnames) = get_results(sys.argv)
rc = compare_results(runs)
sys.exit(rc)