#! /usr/bin/env python

"""Regression test.

This will find all modules whose name is "test_*" in the test
directory, and run them.  Various command line options provide
additional facilities.

Command line options:

-v: verbose -- print the name name of each test as it is being run
-q: quiet -- don't print anything except if a test fails
-g: generate -- write the output file for a test instead of comparing it
-x: exclude -- arguments are tests to *exclude*

If non-option arguments are present, they are names for tests to run,
unless -x is given, in which case they are names for tests not to run.
If no test names are given, all tests are run.
"""

import sys
import string
import os
import getopt

import test_support

def main():
    try:
	opts, args = getopt.getopt(sys.argv[1:], 'vgqx')
    except getopt.error, msg:
	print msg
	print __doc__
	sys.exit(2)
    verbose = 0
    quiet = 0
    generate = 0
    exclude = 0
    for o, a in opts:
	if o == '-v': verbose = 1
	if o == '-q': quiet = 1
	if o == '-g': generate = 1
	if o == '-x': exclude = 1
    good = []
    bad = []
    skipped = []
    if exclude:
	nottests[:0] = args
	args = []
    tests = args or findtests()
    test_support.verbose = 0		# Tell tests to be moderately quiet
    for test in tests:
	if verbose:
	    print test
	ok = runtest(test, generate)
	if ok > 0:
	    good.append(test)
	elif ok == 0:
	    bad.append(test)
	else:
	    if not quiet:
		print "test", test,
		print "skipped -- an optional feature could not be imported"
	    skipped.append(test)
    if good and not quiet:
	if not bad and not skipped and len(good) > 1:
	    print "All",
	print count(len(good), "test"), "OK."
    if bad:
	print count(len(bad), "test"), "failed:",
	print string.join(bad)
    if skipped and not quiet:
	print count(len(skipped), "test"), "skipped:",
	print string.join(skipped)
    sys.exit(len(bad) > 0)

stdtests = [
    'test_grammar',
    'test_opcodes',
    'test_operations',
    'test_builtin',
    'test_exceptions',
    'test_types',
   ]

nottests = [
    'test_support',
    'test_b1',
    'test_b2',
    ]

def findtests():
    """Return a list of all applicable test modules."""
    testdir = findtestdir()
    names = os.listdir(testdir)
    tests = []
    for name in names:
	if name[:5] == "test_" and name[-3:] == ".py":
	    modname = name[:-3]
	    if modname not in stdtests and modname not in nottests:
		tests.append(modname)
    tests.sort()
    return stdtests + tests

def runtest(test, generate):
    test_support.unload(test)
    testdir = findtestdir()
    outputdir = os.path.join(testdir, "output")
    outputfile = os.path.join(outputdir, test)
    try:
	if generate:
	    cfp = open(outputfile, "w")
	else:
	    cfp = Compare(outputfile)
    except IOError:
	cfp = None
	print "Warning: can't open", outputfile
    try:
	save_stdout = sys.stdout
	try:
	    if cfp:
		sys.stdout = cfp
		print test		# Output file starts with test name
	    __import__(test)
	finally:
	    sys.stdout = save_stdout
    except ImportError, msg:
	return -1
    except test_support.TestFailed, msg:
	print "test", test, "failed --", msg
	return 0
    else:
	return 1

def findtestdir():
    if __name__ == '__main__':
	file = sys.argv[0]
    else:
	file = __file__
    testdir = os.path.dirname(file) or os.curdir
    return testdir

def count(n, word):
    if n == 1:
	return "%d %s" % (n, word)
    else:
	return "%d %ss" % (n, word)

class Compare:

    def __init__(self, filename):
	self.fp = open(filename, 'r')

    def write(self, data):
	expected = self.fp.read(len(data))
	if data <> expected:
	    raise test_support.TestFailed, \
		    'Writing: '+`data`+', expected: '+`expected`

    def close(self):
	leftover = self.fp.read()
	if leftover:
	    raise test_support.TestFailed, 'Unread: '+`leftover`
	self.fp.close()

    def isatty(self):
	return 0

if __name__ == '__main__':
    main()