diff options
Diffstat (limited to 'Lib/test/test_fileinput.py')
| -rw-r--r-- | Lib/test/test_fileinput.py | 397 |
1 files changed, 197 insertions, 200 deletions
diff --git a/Lib/test/test_fileinput.py b/Lib/test/test_fileinput.py index 17ca944..10d3cfc 100644 --- a/Lib/test/test_fileinput.py +++ b/Lib/test/test_fileinput.py @@ -3,7 +3,9 @@ Tests for fileinput module. Nick Mathewson ''' -from test.test_support import verify, verbose, TESTFN, TestFailed +import unittest +from test.test_support import verbose, TESTFN, run_unittest +from test.test_support import unlink as safe_unlink import sys, os, re from StringIO import StringIO from fileinput import FileInput, hook_encoded @@ -18,211 +20,206 @@ from fileinput import FileInput, hook_encoded def writeTmp(i, lines, mode='w'): # opening in text mode is the default name = TESTFN + str(i) f = open(name, mode) - for line in lines: - f.write(line) + 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") + safe_unlink(name) + +class BufferSizesTests(unittest.TestCase): + def test_buffer_sizes(self): + # First, run the tests with default and teeny buffer size. + for round, bs in (0, 0), (1, 30): + try: + 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)]) + self.buffer_size_test(t1, t2, t3, t4, bs, round) + finally: + remove_tempfiles(t1, t2, t3, t4) + + def buffer_size_test(self, t1, t2, t3, t4, bs=0, round=0): + pat = re.compile(r'LINE (\d+) OF FILE (\d+)') + + 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) - verify(len(lines) == 33) - verify(lines[32] == 'Line 2 of stdin\n') - verify(fi.filename() == '<stdin>') + fi.close() + self.assertEqual(len(lines), 31) + self.assertEqual(lines[4], 'Line 5 of file 1\n') + self.assertEqual(lines[30], 'Line 1 of file 4\n') + self.assertEqual(fi.lineno(), 31) + self.assertEqual(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() + self.assertEqual(fi.filename(), t2) + self.assertEqual(fi.lineno(), 21) + self.assertEqual(fi.filelineno(), 6) + self.failIf(fi.isfirstline()) + self.failIf(fi.isstdin()) + + if verbose: + print('%s. Nextfile (bs=%s)' % (start+2, bs)) + fi.nextfile() + self.assertEqual(fi.readline(), 'Line 1 of file 3\n') + self.assertEqual(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) + self.assertEqual(len(lines), 33) + self.assertEqual(lines[32], 'Line 2 of stdin\n') + self.assertEqual(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) + self.assertEqual(fi.lineno(), 0) + self.assertEqual(fi.filename(), None) 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) + self.assertEqual(fi.lineno(), 0) + self.assertEqual(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: - line = line[:-1].upper() - print(line) + self.assertEqual(line[-1], '\n') + m = pat.match(line[:-1]) + self.assertNotEqual(m, None) + self.assertEqual(int(m.group(1)), fi.filelineno()) 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 = next(fi) - 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) + +class FileInputTests(unittest.TestCase): + def test_zero_byte_files(self): + 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() + self.assertEqual(line, 'The only line there is.\n') + self.assertEqual(fi.lineno(), 1) + self.assertEqual(fi.filelineno(), 1) + self.assertEqual(fi.filename(), t3) + + line = fi.readline() + self.failIf(line) + self.assertEqual(fi.lineno(), 1) + self.assertEqual(fi.filelineno(), 0) + self.assertEqual(fi.filename(), t4) + fi.close() + finally: + remove_tempfiles(t1, t2, t3, t4) + + def test_files_that_dont_end_with_newline(self): + try: + t1 = writeTmp(1, ["A\nB\nC"]) + t2 = writeTmp(2, ["D\nE\nF"]) + fi = FileInput(files=(t1, t2)) + lines = list(fi) + self.assertEqual(lines, ["A\n", "B\n", "C", "D\n", "E\n", "F"]) + self.assertEqual(fi.filelineno(), 3) + self.assertEqual(fi.lineno(), 6) + finally: + remove_tempfiles(t1, t2) + + def test_unicode_filenames(self): + try: + t1 = writeTmp(1, ["A\nB"]) + encoding = sys.getfilesystemencoding() + if encoding is None: + encoding = 'ascii' + fi = FileInput(files=unicode(t1, encoding)) + lines = list(fi) + self.assertEqual(lines, ["A\n", "B"]) + finally: + remove_tempfiles(t1) + + def test_fileno(self): + try: + t1 = writeTmp(1, ["A\nB"]) + t2 = writeTmp(2, ["C\nD"]) + fi = FileInput(files=(t1, t2)) + self.assertEqual(fi.fileno(), -1) + line =next( fi) + self.assertNotEqual(fi.fileno(), -1) + fi.nextfile() + self.assertEqual(fi.fileno(), -1) + line = list(fi) + self.assertEqual(fi.fileno(), -1) + finally: + remove_tempfiles(t1, t2) + + def test_opening_mode(self): + try: + # invalid mode, should raise ValueError + fi = FileInput(mode="w") + self.fail("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) + self.assertEqual(lines, ["A\n", "B\n", "C\n", "D"]) + finally: + remove_tempfiles(t1) + + def test_file_opening_hook(self): + try: + # cannot use openhook and inplace mode + fi = FileInput(inplace=1, openhook=lambda f, m: None) + self.fail("FileInput should raise if both inplace " + "and openhook arguments are given") + except ValueError: + pass + try: + fi = FileInput(openhook=1) + self.fail("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) + self.assertEqual(lines, ["N\n", "O"]) + finally: + remove_tempfiles(t1) + +def test_main(): + run_unittest(BufferSizesTests, FileInputTests) + +if __name__ == "__main__": + test_main() |