Current Path : /compat/linux/proc/self/root/usr/local/lib/python2.5/test/ |
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Current File : //compat/linux/proc/self/root/usr/local/lib/python2.5/test/test_fileinput.py |
''' Tests for fileinput module. Nick Mathewson ''' from test.test_support import verify, verbose, TESTFN, TestFailed import sys, os, re from StringIO import StringIO from fileinput import FileInput, hook_encoded # 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, mode='w'): # opening in text mode is the default name = TESTFN + str(i) f = open(name, mode) 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) if verbose: print "15. Unicode filenames" try: t1 = writeTmp(1, ["A\nB"]) encoding = sys.getfilesystemencoding() if encoding is None: encoding = 'ascii' fi = FileInput(files=unicode(t1, encoding)) lines = list(fi) verify(lines == ["A\n", "B"]) finally: remove_tempfiles(t1) if verbose: print "16. fileno()" try: t1 = writeTmp(1, ["A\nB"]) t2 = writeTmp(2, ["C\nD"]) fi = FileInput(files=(t1, t2)) verify(fi.fileno() == -1) line = fi.next() verify(fi.fileno() != -1) fi.nextfile() verify(fi.fileno() == -1) line = list(fi) verify(fi.fileno() == -1) finally: remove_tempfiles(t1, t2) if verbose: print "17. Specify opening mode" try: # invalid mode, should raise ValueError fi = FileInput(mode="w") raise TestFailed("FileInput should reject invalid mode argument") except ValueError: pass try: # try opening in universal newline mode t1 = writeTmp(1, ["A\nB\r\nC\rD"], mode="wb") fi = FileInput(files=t1, mode="U") lines = list(fi) verify(lines == ["A\n", "B\n", "C\n", "D"]) finally: remove_tempfiles(t1) if verbose: print "18. Test file opening hook" try: # cannot use openhook and inplace mode fi = FileInput(inplace=1, openhook=lambda f,m: None) raise TestFailed("FileInput should raise if both inplace " "and openhook arguments are given") except ValueError: pass try: fi = FileInput(openhook=1) raise TestFailed("FileInput should check openhook for being callable") except ValueError: pass try: t1 = writeTmp(1, ["A\nB"], mode="wb") fi = FileInput(files=t1, openhook=hook_encoded("rot13")) lines = list(fi) verify(lines == ["N\n", "O"]) finally: remove_tempfiles(t1)