Initial commit of OpenSPARC T2 architecture model.

[OpenSPARC-T2-SAM] / sam-t2 / devtools / amd64 / lib / python2.4 / test / test_fileinput.py

'''
Tests for fileinput module.
Nick Mathewson
'''

from test.test_support import verify, verbose, TESTFN
import sys, os, re
from StringIO import StringIO
from fileinput import FileInput

# The fileinput module has 2 interfaces: the FileInput class which does
# all the work, and a few functions (input, etc.) that use a global _state
# variable.  We only test the FileInput class, since the other functions
# only provide a thin facade over FileInput.

# Write lines (a list of lines) to temp file number i, and return the
# temp file's name.
def writeTmp(i, lines):
   name = TESTFN + str(i)
   f = open(name, 'w')
   f.writelines(lines)
   f.close()
   return name

pat = re.compile(r'LINE (\d+) OF FILE (\d+)')

def remove_tempfiles(*names):
   for name in names:
       try:
           os.unlink(name)
       except:
           pass

def runTests(t1, t2, t3, t4, bs=0, round=0):
   start = 1 + round*6
   if verbose:
       print '%s. Simple iteration (bs=%s)' % (start+0, bs)
   fi = FileInput(files=(t1, t2, t3, t4), bufsize=bs)
   lines = list(fi)
   fi.close()
   verify(len(lines) == 31)
   verify(lines[4] == 'Line 5 of file 1\n')
   verify(lines[30] == 'Line 1 of file 4\n')
   verify(fi.lineno() == 31)
   verify(fi.filename() == t4)

   if verbose:
       print '%s. Status variables (bs=%s)' % (start+1, bs)
   fi = FileInput(files=(t1, t2, t3, t4), bufsize=bs)
   s = "x"
   while s and s != 'Line 6 of file 2\n':
       s = fi.readline()
   verify(fi.filename() == t2)
   verify(fi.lineno() == 21)
   verify(fi.filelineno() == 6)
   verify(not fi.isfirstline())
   verify(not fi.isstdin())

   if verbose:
       print '%s. Nextfile (bs=%s)' % (start+2, bs)
   fi.nextfile()
   verify(fi.readline() == 'Line 1 of file 3\n')
   verify(fi.lineno() == 22)
   fi.close()

   if verbose:
       print '%s. Stdin (bs=%s)' % (start+3, bs)
   fi = FileInput(files=(t1, t2, t3, t4, '-'), bufsize=bs)
   savestdin = sys.stdin
   try:
       sys.stdin = StringIO("Line 1 of stdin\nLine 2 of stdin\n")
       lines = list(fi)
       verify(len(lines) == 33)
       verify(lines[32] == 'Line 2 of stdin\n')
       verify(fi.filename() == '<stdin>')
       fi.nextfile()
   finally:
       sys.stdin = savestdin

   if verbose:
       print '%s. Boundary conditions (bs=%s)' % (start+4, bs)
   fi = FileInput(files=(t1, t2, t3, t4), bufsize=bs)
   verify(fi.lineno() == 0)
   verify(fi.filename() == None)
   fi.nextfile()
   verify(fi.lineno() == 0)
   verify(fi.filename() == None)

   if verbose:
       print '%s. Inplace (bs=%s)' % (start+5, bs)
   savestdout = sys.stdout
   try:
       fi = FileInput(files=(t1, t2, t3, t4), inplace=1, bufsize=bs)
       for line in fi:
           line = line[:-1].upper()
           print line
       fi.close()
   finally:
       sys.stdout = savestdout

   fi = FileInput(files=(t1, t2, t3, t4), bufsize=bs)
   for line in fi:
       verify(line[-1] == '\n')
       m = pat.match(line[:-1])
       verify(m != None)
       verify(int(m.group(1)) == fi.filelineno())
   fi.close()


def writeFiles():
   global t1, t2, t3, t4
   t1 = writeTmp(1, ["Line %s of file 1\n" % (i+1) for i in range(15)])
   t2 = writeTmp(2, ["Line %s of file 2\n" % (i+1) for i in range(10)])
   t3 = writeTmp(3, ["Line %s of file 3\n" % (i+1) for i in range(5)])
   t4 = writeTmp(4, ["Line %s of file 4\n" % (i+1) for i in range(1)])

# First, run the tests with default and teeny buffer size.
for round, bs in (0, 0), (1, 30):
   try:
       writeFiles()
       runTests(t1, t2, t3, t4, bs, round)
   finally:
       remove_tempfiles(t1, t2, t3, t4)

# Next, check for proper behavior with 0-byte files.
if verbose:
   print "13. 0-byte files"
try:
   t1 = writeTmp(1, [""])
   t2 = writeTmp(2, [""])
   t3 = writeTmp(3, ["The only line there is.\n"])
   t4 = writeTmp(4, [""])
   fi = FileInput(files=(t1, t2, t3, t4))
   line = fi.readline()
   verify(line == 'The only line there is.\n')
   verify(fi.lineno() == 1)
   verify(fi.filelineno() == 1)
   verify(fi.filename() == t3)
   line = fi.readline()
   verify(not line)
   verify(fi.lineno() == 1)
   verify(fi.filelineno() == 0)
   verify(fi.filename() == t4)
   fi.close()
finally:
   remove_tempfiles(t1, t2, t3, t4)

if verbose:
   print "14. Files that don't end with newline"
try:
   t1 = writeTmp(1, ["A\nB\nC"])
   t2 = writeTmp(2, ["D\nE\nF"])
   fi = FileInput(files=(t1, t2))
   lines = list(fi)
   verify(lines == ["A\n", "B\n", "C", "D\n", "E\n", "F"])
   verify(fi.filelineno() == 3)
   verify(fi.lineno() == 6)
finally:
   remove_tempfiles(t1, t2)