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- '''
- Tests for fileinput module.
- Nick Mathewson
- '''
-
- from 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)
-