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Þ'¯°ÌME[YéïĵÂCå½ Ué©Áû'Ê9%eÔðNU”ë‘ÌsD3/®+UI˜9h.WC”빓$#:pz:YÓ ¿xž* ³$Í +$kñAŠ‹†¢ Uê>¸)_š¬÷©ßAÂÔb9ÇU ¯¾á•9¯ÏÏ÷O÷¼¼Fähal1‰3Ì[Ïr•´UCksNÐ] R‘¸¥H+§Šé†c©vÖÞ0iÓ76s†î!§=ß ¼~Ô'°Ãmäoäš³ªøi1úÉ)³yV8 CLÄØÁ‘WYïi€H6ÖÑiámø^ÈY´°Ñ7¥Û*—Ñ©L«Qƒï—Ùrÿ ›£Ð*š¸ˆL©ˆ$ˆ ÷¾D§9È®«qbqC)–ˆïv´çñsÑVT­Ø, <àïºÀO«Jý·õ àfPìð .wFšir´þ’2_Y *Æ€x\« ì€9š@ Ž|F⇥ˆkZ@hÖÄ0t¿-<“‹qµ¾*ZL¤Ú)&BJpÓF5=$„at*Zš$’ÑtdûÝRI1 2Ž‰$€$I$#‰SÞ’Hë¬ï;Á$¡t$’`<(ñÇt)$‡Ð.Êf¢X’Kt=Éé$‚ˆªè¢oÝëòI%Rgcª÷ŠyI%¡‰ÿ !ñ)´õ $¤ Ô’IIGÿÙ''' Tests for fileinput module. Nick Mathewson ''' import os import sys import re import fileinput import collections import builtins import tempfile import unittest try: import bz2 except ImportError: bz2 = None try: import gzip except ImportError: gzip = None from io import BytesIO, StringIO from fileinput import FileInput, hook_encoded from pathlib import Path from test.support import verbose, TESTFN, check_warnings from test.support import unlink as safe_unlink from test import support from unittest import mock # 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. class BaseTests: # Write a content (str or bytes) to temp file, and return the # temp file's name. def writeTmp(self, content, *, mode='w'): # opening in text mode is the default fd, name = tempfile.mkstemp() self.addCleanup(support.unlink, name) with open(fd, mode) as f: f.write(content) return name class LineReader: def __init__(self): self._linesread = [] @property def linesread(self): try: return self._linesread[:] finally: self._linesread = [] def openhook(self, filename, mode): self.it = iter(filename.splitlines(True)) return self def readline(self, size=None): line = next(self.it, '') self._linesread.append(line) return line def readlines(self, hint=-1): lines = [] size = 0 while True: line = self.readline() if not line: return lines lines.append(line) size += len(line) if size >= hint: return lines def close(self): pass class BufferSizesTests(BaseTests, unittest.TestCase): def test_buffer_sizes(self): t1 = self.writeTmp(''.join("Line %s of file 1\n" % (i+1) for i in range(15))) t2 = self.writeTmp(''.join("Line %s of file 2\n" % (i+1) for i in range(10))) t3 = self.writeTmp(''.join("Line %s of file 3\n" % (i+1) for i in range(5))) t4 = self.writeTmp(''.join("Line %s of file 4\n" % (i+1) for i in range(1))) pat = re.compile(r'LINE (\d+) OF FILE (\d+)') if verbose: print('1. Simple iteration') fi = FileInput(files=(t1, t2, t3, t4)) lines = list(fi) 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('2. Status variables') fi = FileInput(files=(t1, t2, t3, t4)) 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.assertFalse(fi.isfirstline()) self.assertFalse(fi.isstdin()) if verbose: print('3. Nextfile') fi.nextfile() self.assertEqual(fi.readline(), 'Line 1 of file 3\n') self.assertEqual(fi.lineno(), 22) fi.close() if verbose: print('4. Stdin') fi = FileInput(files=(t1, t2, t3, t4, '-')) 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(), '') fi.nextfile() finally: sys.stdin = savestdin if verbose: print('5. Boundary conditions') fi = FileInput(files=(t1, t2, t3, t4)) self.assertEqual(fi.lineno(), 0) self.assertEqual(fi.filename(), None) fi.nextfile() self.assertEqual(fi.lineno(), 0) self.assertEqual(fi.filename(), None) if verbose: print('6. Inplace') savestdout = sys.stdout try: fi = FileInput(files=(t1, t2, t3, t4), inplace=1) for line in fi: line = line[:-1].upper() print(line) fi.close() finally: sys.stdout = savestdout fi = FileInput(files=(t1, t2, t3, t4)) for line in fi: self.assertEqual(line[-1], '\n') m = pat.match(line[:-1]) self.assertNotEqual(m, None) self.assertEqual(int(m.group(1)), fi.filelineno()) fi.close() class UnconditionallyRaise: def __init__(self, exception_type): self.exception_type = exception_type self.invoked = False def __call__(self, *args, **kwargs): self.invoked = True raise self.exception_type() class FileInputTests(BaseTests, unittest.TestCase): def test_zero_byte_files(self): t1 = self.writeTmp("") t2 = self.writeTmp("") t3 = self.writeTmp("The only line there is.\n") t4 = self.writeTmp("") 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.assertFalse(line) self.assertEqual(fi.lineno(), 1) self.assertEqual(fi.filelineno(), 0) self.assertEqual(fi.filename(), t4) fi.close() def test_files_that_dont_end_with_newline(self): t1 = self.writeTmp("A\nB\nC") t2 = self.writeTmp("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) ## def test_unicode_filenames(self): ## # XXX A unicode string is always returned by writeTmp. ## # So is this needed? ## t1 = self.writeTmp("A\nB") ## encoding = sys.getfilesystemencoding() ## if encoding is None: ## encoding = 'ascii' ## fi = FileInput(files=str(t1, encoding)) ## lines = list(fi) ## self.assertEqual(lines, ["A\n", "B"]) def test_fileno(self): t1 = self.writeTmp("A\nB") t2 = self.writeTmp("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) 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 opening in universal newline mode t1 = self.writeTmp(b"A\nB\r\nC\rD", mode="wb") with check_warnings(('', DeprecationWarning)): fi = FileInput(files=t1, mode="U") with check_warnings(('', DeprecationWarning)): lines = list(fi) self.assertEqual(lines, ["A\n", "B\n", "C\n", "D"]) def test_stdin_binary_mode(self): with mock.patch('sys.stdin') as m_stdin: m_stdin.buffer = BytesIO(b'spam, bacon, sausage, and spam') fi = FileInput(files=['-'], mode='rb') lines = list(fi) self.assertEqual(lines, [b'spam, bacon, sausage, and spam']) def test_detached_stdin_binary_mode(self): orig_stdin = sys.stdin try: sys.stdin = BytesIO(b'spam, bacon, sausage, and spam') self.assertFalse(hasattr(sys.stdin, 'buffer')) fi = FileInput(files=['-'], mode='rb') lines = list(fi) self.assertEqual(lines, [b'spam, bacon, sausage, and spam']) finally: sys.stdin = orig_stdin 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 class CustomOpenHook: def __init__(self): self.invoked = False def __call__(self, *args): self.invoked = True return open(*args) t = self.writeTmp("\n") custom_open_hook = CustomOpenHook() with FileInput([t], openhook=custom_open_hook) as fi: fi.readline() self.assertTrue(custom_open_hook.invoked, "openhook not invoked") def test_readline(self): with open(TESTFN, 'wb') as f: f.write(b'A\nB\r\nC\r') # Fill TextIOWrapper buffer. f.write(b'123456789\n' * 1000) # Issue #20501: readline() shouldn't read whole file. f.write(b'\x80') self.addCleanup(safe_unlink, TESTFN) with FileInput(files=TESTFN, openhook=hook_encoded('ascii')) as fi: try: self.assertEqual(fi.readline(), 'A\n') self.assertEqual(fi.readline(), 'B\n') self.assertEqual(fi.readline(), 'C\n') except UnicodeDecodeError: self.fail('Read to end of file') with self.assertRaises(UnicodeDecodeError): # Read to the end of file. list(fi) self.assertEqual(fi.readline(), '') self.assertEqual(fi.readline(), '') def test_readline_binary_mode(self): with open(TESTFN, 'wb') as f: f.write(b'A\nB\r\nC\rD') self.addCleanup(safe_unlink, TESTFN) with FileInput(files=TESTFN, mode='rb') as fi: self.assertEqual(fi.readline(), b'A\n') self.assertEqual(fi.readline(), b'B\r\n') self.assertEqual(fi.readline(), b'C\rD') # Read to the end of file. self.assertEqual(fi.readline(), b'') self.assertEqual(fi.readline(), b'') def test_inplace_binary_write_mode(self): temp_file = self.writeTmp(b'Initial text.', mode='wb') with FileInput(temp_file, mode='rb', inplace=True) as fobj: line = fobj.readline() self.assertEqual(line, b'Initial text.') # print() cannot be used with files opened in binary mode. sys.stdout.write(b'New line.') with open(temp_file, 'rb') as f: self.assertEqual(f.read(), b'New line.') def test_context_manager(self): t1 = self.writeTmp("A\nB\nC") t2 = self.writeTmp("D\nE\nF") with FileInput(files=(t1, t2)) as fi: 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) self.assertEqual(fi._files, ()) def test_close_on_exception(self): t1 = self.writeTmp("") try: with FileInput(files=t1) as fi: raise OSError except OSError: self.assertEqual(fi._files, ()) def test_empty_files_list_specified_to_constructor(self): with FileInput(files=[]) as fi: self.assertEqual(fi._files, ('-',)) @support.ignore_warnings(category=DeprecationWarning) def test__getitem__(self): """Tests invoking FileInput.__getitem__() with the current line number""" t = self.writeTmp("line1\nline2\n") with FileInput(files=[t]) as fi: retval1 = fi[0] self.assertEqual(retval1, "line1\n") retval2 = fi[1] self.assertEqual(retval2, "line2\n") def test__getitem___deprecation(self): t = self.writeTmp("line1\nline2\n") with self.assertWarnsRegex(DeprecationWarning, r'Use iterator protocol instead'): with FileInput(files=[t]) as fi: self.assertEqual(fi[0], "line1\n") @support.ignore_warnings(category=DeprecationWarning) def test__getitem__invalid_key(self): """Tests invoking FileInput.__getitem__() with an index unequal to the line number""" t = self.writeTmp("line1\nline2\n") with FileInput(files=[t]) as fi: with self.assertRaises(RuntimeError) as cm: fi[1] self.assertEqual(cm.exception.args, ("accessing lines out of order",)) @support.ignore_warnings(category=DeprecationWarning) def test__getitem__eof(self): """Tests invoking FileInput.__getitem__() with the line number but at end-of-input""" t = self.writeTmp('') with FileInput(files=[t]) as fi: with self.assertRaises(IndexError) as cm: fi[0] self.assertEqual(cm.exception.args, ("end of input reached",)) def test_nextfile_oserror_deleting_backup(self): """Tests invoking FileInput.nextfile() when the attempt to delete the backup file would raise OSError. This error is expected to be silently ignored""" os_unlink_orig = os.unlink os_unlink_replacement = UnconditionallyRaise(OSError) try: t = self.writeTmp("\n") self.addCleanup(support.unlink, t + '.bak') with FileInput(files=[t], inplace=True) as fi: next(fi) # make sure the file is opened os.unlink = os_unlink_replacement fi.nextfile() finally: os.unlink = os_unlink_orig # sanity check to make sure that our test scenario was actually hit self.assertTrue(os_unlink_replacement.invoked, "os.unlink() was not invoked") def test_readline_os_fstat_raises_OSError(self): """Tests invoking FileInput.readline() when os.fstat() raises OSError. This exception should be silently discarded.""" os_fstat_orig = os.fstat os_fstat_replacement = UnconditionallyRaise(OSError) try: t = self.writeTmp("\n") with FileInput(files=[t], inplace=True) as fi: os.fstat = os_fstat_replacement fi.readline() finally: os.fstat = os_fstat_orig # sanity check to make sure that our test scenario was actually hit self.assertTrue(os_fstat_replacement.invoked, "os.fstat() was not invoked") def test_readline_os_chmod_raises_OSError(self): """Tests invoking FileInput.readline() when os.chmod() raises OSError. This exception should be silently discarded.""" os_chmod_orig = os.chmod os_chmod_replacement = UnconditionallyRaise(OSError) try: t = self.writeTmp("\n") with FileInput(files=[t], inplace=True) as fi: os.chmod = os_chmod_replacement fi.readline() finally: os.chmod = os_chmod_orig # sanity check to make sure that our test scenario was actually hit self.assertTrue(os_chmod_replacement.invoked, "os.fstat() was not invoked") def test_fileno_when_ValueError_raised(self): class FilenoRaisesValueError(UnconditionallyRaise): def __init__(self): UnconditionallyRaise.__init__(self, ValueError) def fileno(self): self.__call__() unconditionally_raise_ValueError = FilenoRaisesValueError() t = self.writeTmp("\n") with FileInput(files=[t]) as fi: file_backup = fi._file try: fi._file = unconditionally_raise_ValueError result = fi.fileno() finally: fi._file = file_backup # make sure the file gets cleaned up # sanity check to make sure that our test scenario was actually hit self.assertTrue(unconditionally_raise_ValueError.invoked, "_file.fileno() was not invoked") self.assertEqual(result, -1, "fileno() should return -1") def test_readline_buffering(self): src = LineReader() with FileInput(files=['line1\nline2', 'line3\n'], openhook=src.openhook) as fi: self.assertEqual(src.linesread, []) self.assertEqual(fi.readline(), 'line1\n') self.assertEqual(src.linesread, ['line1\n']) self.assertEqual(fi.readline(), 'line2') self.assertEqual(src.linesread, ['line2']) self.assertEqual(fi.readline(), 'line3\n') self.assertEqual(src.linesread, ['', 'line3\n']) self.assertEqual(fi.readline(), '') self.assertEqual(src.linesread, ['']) self.assertEqual(fi.readline(), '') self.assertEqual(src.linesread, []) def test_iteration_buffering(self): src = LineReader() with FileInput(files=['line1\nline2', 'line3\n'], openhook=src.openhook) as fi: self.assertEqual(src.linesread, []) self.assertEqual(next(fi), 'line1\n') self.assertEqual(src.linesread, ['line1\n']) self.assertEqual(next(fi), 'line2') self.assertEqual(src.linesread, ['line2']) self.assertEqual(next(fi), 'line3\n') self.assertEqual(src.linesread, ['', 'line3\n']) self.assertRaises(StopIteration, next, fi) self.assertEqual(src.linesread, ['']) self.assertRaises(StopIteration, next, fi) self.assertEqual(src.linesread, []) def test_pathlib_file(self): t1 = Path(self.writeTmp("Pathlib file.")) with FileInput(t1) as fi: line = fi.readline() self.assertEqual(line, 'Pathlib file.') self.assertEqual(fi.lineno(), 1) self.assertEqual(fi.filelineno(), 1) self.assertEqual(fi.filename(), os.fspath(t1)) def test_pathlib_file_inplace(self): t1 = Path(self.writeTmp('Pathlib file.')) with FileInput(t1, inplace=True) as fi: line = fi.readline() self.assertEqual(line, 'Pathlib file.') print('Modified %s' % line) with open(t1) as f: self.assertEqual(f.read(), 'Modified Pathlib file.\n') class MockFileInput: """A class that mocks out fileinput.FileInput for use during unit tests""" def __init__(self, files=None, inplace=False, backup="", *, mode="r", openhook=None): self.files = files self.inplace = inplace self.backup = backup self.mode = mode self.openhook = openhook self._file = None self.invocation_counts = collections.defaultdict(lambda: 0) self.return_values = {} def close(self): self.invocation_counts["close"] += 1 def nextfile(self): self.invocation_counts["nextfile"] += 1 return self.return_values["nextfile"] def filename(self): self.invocation_counts["filename"] += 1 return self.return_values["filename"] def lineno(self): self.invocation_counts["lineno"] += 1 return self.return_values["lineno"] def filelineno(self): self.invocation_counts["filelineno"] += 1 return self.return_values["filelineno"] def fileno(self): self.invocation_counts["fileno"] += 1 return self.return_values["fileno"] def isfirstline(self): self.invocation_counts["isfirstline"] += 1 return self.return_values["isfirstline"] def isstdin(self): self.invocation_counts["isstdin"] += 1 return self.return_values["isstdin"] class BaseFileInputGlobalMethodsTest(unittest.TestCase): """Base class for unit tests for the global function of the fileinput module.""" def setUp(self): self._orig_state = fileinput._state self._orig_FileInput = fileinput.FileInput fileinput.FileInput = MockFileInput def tearDown(self): fileinput.FileInput = self._orig_FileInput fileinput._state = self._orig_state def assertExactlyOneInvocation(self, mock_file_input, method_name): # assert that the method with the given name was invoked once actual_count = mock_file_input.invocation_counts[method_name] self.assertEqual(actual_count, 1, method_name) # assert that no other unexpected methods were invoked actual_total_count = len(mock_file_input.invocation_counts) self.assertEqual(actual_total_count, 1) class Test_fileinput_input(BaseFileInputGlobalMethodsTest): """Unit tests for fileinput.input()""" def test_state_is_not_None_and_state_file_is_not_None(self): """Tests invoking fileinput.input() when fileinput._state is not None and its _file attribute is also not None. Expect RuntimeError to be raised with a meaningful error message and for fileinput._state to *not* be modified.""" instance = MockFileInput() instance._file = object() fileinput._state = instance with self.assertRaises(RuntimeError) as cm: fileinput.input() self.assertEqual(("input() already active",), cm.exception.args) self.assertIs(instance, fileinput._state, "fileinput._state") def test_state_is_not_None_and_state_file_is_None(self): """Tests invoking fileinput.input() when fileinput._state is not None but its _file attribute *is* None. Expect it to create and return a new fileinput.FileInput object with all method parameters passed explicitly to the __init__() method; also ensure that fileinput._state is set to the returned instance.""" instance = MockFileInput() instance._file = None fileinput._state = instance self.do_test_call_input() def test_state_is_None(self): """Tests invoking fileinput.input() when fileinput._state is None Expect it to create and return a new fileinput.FileInput object with all method parameters passed explicitly to the __init__() method; also ensure that fileinput._state is set to the returned instance.""" fileinput._state = None self.do_test_call_input() def do_test_call_input(self): """Tests that fileinput.input() creates a new fileinput.FileInput object, passing the given parameters unmodified to fileinput.FileInput.__init__(). Note that this test depends on the monkey patching of fileinput.FileInput done by setUp().""" files = object() inplace = object() backup = object() mode = object() openhook = object() # call fileinput.input() with different values for each argument result = fileinput.input(files=files, inplace=inplace, backup=backup, mode=mode, openhook=openhook) # ensure fileinput._state was set to the returned object self.assertIs(result, fileinput._state, "fileinput._state") # ensure the parameters to fileinput.input() were passed directly # to FileInput.__init__() self.assertIs(files, result.files, "files") self.assertIs(inplace, result.inplace, "inplace") self.assertIs(backup, result.backup, "backup") self.assertIs(mode, result.mode, "mode") self.assertIs(openhook, result.openhook, "openhook") class Test_fileinput_close(BaseFileInputGlobalMethodsTest): """Unit tests for fileinput.close()""" def test_state_is_None(self): """Tests that fileinput.close() does nothing if fileinput._state is None""" fileinput._state = None fileinput.close() self.assertIsNone(fileinput._state) def test_state_is_not_None(self): """Tests that fileinput.close() invokes close() on fileinput._state and sets _state=None""" instance = MockFileInput() fileinput._state = instance fileinput.close() self.assertExactlyOneInvocation(instance, "close") self.assertIsNone(fileinput._state) class Test_fileinput_nextfile(BaseFileInputGlobalMethodsTest): """Unit tests for fileinput.nextfile()""" def test_state_is_None(self): """Tests fileinput.nextfile() when fileinput._state is None. Ensure that it raises RuntimeError with a meaningful error message and does not modify fileinput._state""" fileinput._state = None with self.assertRaises(RuntimeError) as cm: fileinput.nextfile() self.assertEqual(("no active input()",), cm.exception.args) self.assertIsNone(fileinput._state) def test_state_is_not_None(self): """Tests fileinput.nextfile() when fileinput._state is not None. Ensure that it invokes fileinput._state.nextfile() exactly once, returns whatever it returns, and does not modify fileinput._state to point to a different object.""" nextfile_retval = object() instance = MockFileInput() instance.return_values["nextfile"] = nextfile_retval fileinput._state = instance retval = fileinput.nextfile() self.assertExactlyOneInvocation(instance, "nextfile") self.assertIs(retval, nextfile_retval) self.assertIs(fileinput._state, instance) class Test_fileinput_filename(BaseFileInputGlobalMethodsTest): """Unit tests for fileinput.filename()""" def test_state_is_None(self): """Tests fileinput.filename() when fileinput._state is None. Ensure that it raises RuntimeError with a meaningful error message and does not modify fileinput._state""" fileinput._state = None with self.assertRaises(RuntimeError) as cm: fileinput.filename() self.assertEqual(("no active input()",), cm.exception.args) self.assertIsNone(fileinput._state) def test_state_is_not_None(self): """Tests fileinput.filename() when fileinput._state is not None. Ensure that it invokes fileinput._state.filename() exactly once, returns whatever it returns, and does not modify fileinput._state to point to a different object.""" filename_retval = object() instance = MockFileInput() instance.return_values["filename"] = filename_retval fileinput._state = instance retval = fileinput.filename() self.assertExactlyOneInvocation(instance, "filename") self.assertIs(retval, filename_retval) self.assertIs(fileinput._state, instance) class Test_fileinput_lineno(BaseFileInputGlobalMethodsTest): """Unit tests for fileinput.lineno()""" def test_state_is_None(self): """Tests fileinput.lineno() when fileinput._state is None. Ensure that it raises RuntimeError with a meaningful error message and does not modify fileinput._state""" fileinput._state = None with self.assertRaises(RuntimeError) as cm: fileinput.lineno() self.assertEqual(("no active input()",), cm.exception.args) self.assertIsNone(fileinput._state) def test_state_is_not_None(self): """Tests fileinput.lineno() when fileinput._state is not None. Ensure that it invokes fileinput._state.lineno() exactly once, returns whatever it returns, and does not modify fileinput._state to point to a different object.""" lineno_retval = object() instance = MockFileInput() instance.return_values["lineno"] = lineno_retval fileinput._state = instance retval = fileinput.lineno() self.assertExactlyOneInvocation(instance, "lineno") self.assertIs(retval, lineno_retval) self.assertIs(fileinput._state, instance) class Test_fileinput_filelineno(BaseFileInputGlobalMethodsTest): """Unit tests for fileinput.filelineno()""" def test_state_is_None(self): """Tests fileinput.filelineno() when fileinput._state is None. Ensure that it raises RuntimeError with a meaningful error message and does not modify fileinput._state""" fileinput._state = None with self.assertRaises(RuntimeError) as cm: fileinput.filelineno() self.assertEqual(("no active input()",), cm.exception.args) self.assertIsNone(fileinput._state) def test_state_is_not_None(self): """Tests fileinput.filelineno() when fileinput._state is not None. Ensure that it invokes fileinput._state.filelineno() exactly once, returns whatever it returns, and does not modify fileinput._state to point to a different object.""" filelineno_retval = object() instance = MockFileInput() instance.return_values["filelineno"] = filelineno_retval fileinput._state = instance retval = fileinput.filelineno() self.assertExactlyOneInvocation(instance, "filelineno") self.assertIs(retval, filelineno_retval) self.assertIs(fileinput._state, instance) class Test_fileinput_fileno(BaseFileInputGlobalMethodsTest): """Unit tests for fileinput.fileno()""" def test_state_is_None(self): """Tests fileinput.fileno() when fileinput._state is None. Ensure that it raises RuntimeError with a meaningful error message and does not modify fileinput._state""" fileinput._state = None with self.assertRaises(RuntimeError) as cm: fileinput.fileno() self.assertEqual(("no active input()",), cm.exception.args) self.assertIsNone(fileinput._state) def test_state_is_not_None(self): """Tests fileinput.fileno() when fileinput._state is not None. Ensure that it invokes fileinput._state.fileno() exactly once, returns whatever it returns, and does not modify fileinput._state to point to a different object.""" fileno_retval = object() instance = MockFileInput() instance.return_values["fileno"] = fileno_retval instance.fileno_retval = fileno_retval fileinput._state = instance retval = fileinput.fileno() self.assertExactlyOneInvocation(instance, "fileno") self.assertIs(retval, fileno_retval) self.assertIs(fileinput._state, instance) class Test_fileinput_isfirstline(BaseFileInputGlobalMethodsTest): """Unit tests for fileinput.isfirstline()""" def test_state_is_None(self): """Tests fileinput.isfirstline() when fileinput._state is None. Ensure that it raises RuntimeError with a meaningful error message and does not modify fileinput._state""" fileinput._state = None with self.assertRaises(RuntimeError) as cm: fileinput.isfirstline() self.assertEqual(("no active input()",), cm.exception.args) self.assertIsNone(fileinput._state) def test_state_is_not_None(self): """Tests fileinput.isfirstline() when fileinput._state is not None. Ensure that it invokes fileinput._state.isfirstline() exactly once, returns whatever it returns, and does not modify fileinput._state to point to a different object.""" isfirstline_retval = object() instance = MockFileInput() instance.return_values["isfirstline"] = isfirstline_retval fileinput._state = instance retval = fileinput.isfirstline() self.assertExactlyOneInvocation(instance, "isfirstline") self.assertIs(retval, isfirstline_retval) self.assertIs(fileinput._state, instance) class Test_fileinput_isstdin(BaseFileInputGlobalMethodsTest): """Unit tests for fileinput.isstdin()""" def test_state_is_None(self): """Tests fileinput.isstdin() when fileinput._state is None. Ensure that it raises RuntimeError with a meaningful error message and does not modify fileinput._state""" fileinput._state = None with self.assertRaises(RuntimeError) as cm: fileinput.isstdin() self.assertEqual(("no active input()",), cm.exception.args) self.assertIsNone(fileinput._state) def test_state_is_not_None(self): """Tests fileinput.isstdin() when fileinput._state is not None. Ensure that it invokes fileinput._state.isstdin() exactly once, returns whatever it returns, and does not modify fileinput._state to point to a different object.""" isstdin_retval = object() instance = MockFileInput() instance.return_values["isstdin"] = isstdin_retval fileinput._state = instance retval = fileinput.isstdin() self.assertExactlyOneInvocation(instance, "isstdin") self.assertIs(retval, isstdin_retval) self.assertIs(fileinput._state, instance) class InvocationRecorder: def __init__(self): self.invocation_count = 0 def __call__(self, *args, **kwargs): self.invocation_count += 1 self.last_invocation = (args, kwargs) class Test_hook_compressed(unittest.TestCase): """Unit tests for fileinput.hook_compressed()""" def setUp(self): self.fake_open = InvocationRecorder() def test_empty_string(self): self.do_test_use_builtin_open("", 1) def test_no_ext(self): self.do_test_use_builtin_open("abcd", 2) @unittest.skipUnless(gzip, "Requires gzip and zlib") def test_gz_ext_fake(self): original_open = gzip.open gzip.open = self.fake_open try: result = fileinput.hook_compressed("test.gz", 3) finally: gzip.open = original_open self.assertEqual(self.fake_open.invocation_count, 1) self.assertEqual(self.fake_open.last_invocation, (("test.gz", 3), {})) @unittest.skipUnless(bz2, "Requires bz2") def test_bz2_ext_fake(self): original_open = bz2.BZ2File bz2.BZ2File = self.fake_open try: result = fileinput.hook_compressed("test.bz2", 4) finally: bz2.BZ2File = original_open self.assertEqual(self.fake_open.invocation_count, 1) self.assertEqual(self.fake_open.last_invocation, (("test.bz2", 4), {})) def test_blah_ext(self): self.do_test_use_builtin_open("abcd.blah", 5) def test_gz_ext_builtin(self): self.do_test_use_builtin_open("abcd.Gz", 6) def test_bz2_ext_builtin(self): self.do_test_use_builtin_open("abcd.Bz2", 7) def do_test_use_builtin_open(self, filename, mode): original_open = self.replace_builtin_open(self.fake_open) try: result = fileinput.hook_compressed(filename, mode) finally: self.replace_builtin_open(original_open) self.assertEqual(self.fake_open.invocation_count, 1) self.assertEqual(self.fake_open.last_invocation, ((filename, mode), {})) @staticmethod def replace_builtin_open(new_open_func): original_open = builtins.open builtins.open = new_open_func return original_open class Test_hook_encoded(unittest.TestCase): """Unit tests for fileinput.hook_encoded()""" def test(self): encoding = object() errors = object() result = fileinput.hook_encoded(encoding, errors=errors) fake_open = InvocationRecorder() original_open = builtins.open builtins.open = fake_open try: filename = object() mode = object() open_result = result(filename, mode) finally: builtins.open = original_open self.assertEqual(fake_open.invocation_count, 1) args, kwargs = fake_open.last_invocation self.assertIs(args[0], filename) self.assertIs(args[1], mode) self.assertIs(kwargs.pop('encoding'), encoding) self.assertIs(kwargs.pop('errors'), errors) self.assertFalse(kwargs) def test_errors(self): with open(TESTFN, 'wb') as f: f.write(b'\x80abc') self.addCleanup(safe_unlink, TESTFN) def check(errors, expected_lines): with FileInput(files=TESTFN, mode='r', openhook=hook_encoded('utf-8', errors=errors)) as fi: lines = list(fi) self.assertEqual(lines, expected_lines) check('ignore', ['abc']) with self.assertRaises(UnicodeDecodeError): check('strict', ['abc']) check('replace', ['\ufffdabc']) check('backslashreplace', ['\\x80abc']) def test_modes(self): with open(TESTFN, 'wb') as f: # UTF-7 is a convenient, seldom used encoding f.write(b'A\nB\r\nC\rD+IKw-') self.addCleanup(safe_unlink, TESTFN) def check(mode, expected_lines): with FileInput(files=TESTFN, mode=mode, openhook=hook_encoded('utf-7')) as fi: lines = list(fi) self.assertEqual(lines, expected_lines) check('r', ['A\n', 'B\n', 'C\n', 'D\u20ac']) with self.assertWarns(DeprecationWarning): check('rU', ['A\n', 'B\n', 'C\n', 'D\u20ac']) with self.assertWarns(DeprecationWarning): check('U', ['A\n', 'B\n', 'C\n', 'D\u20ac']) with self.assertRaises(ValueError): check('rb', ['A\n', 'B\r\n', 'C\r', 'D\u20ac']) class MiscTest(unittest.TestCase): def test_all(self): support.check__all__(self, fileinput) if __name__ == "__main__": unittest.main()