| ''' |
| Tests for fileinput module. |
| Nick Mathewson |
| ''' |
| import os |
| import sys |
| import re |
| import fileinput |
| import collections |
| import builtins |
| import unittest |
| |
| try: |
| import bz2 |
| except ImportError: |
| bz2 = None |
| try: |
| import gzip |
| except ImportError: |
| gzip = None |
| |
| from io import StringIO |
| from fileinput import FileInput, hook_encoded |
| |
| from test.support import verbose, TESTFN, run_unittest |
| from test.support import unlink as safe_unlink |
| |
| |
| # 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. |
| |
| # 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) |
| for line in lines: |
| f.write(line) |
| f.close() |
| return name |
| |
| def remove_tempfiles(*names): |
| for name in names: |
| if name: |
| 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): |
| t1 = t2 = t3 = t4 = None |
| 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) |
| 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.assertFalse(fi.isfirstline()) |
| self.assertFalse(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() |
| 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: |
| 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(unittest.TestCase): |
| |
| def test_zero_byte_files(self): |
| t1 = t2 = t3 = t4 = None |
| 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.assertFalse(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): |
| t1 = t2 = None |
| 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): |
| ## # XXX A unicode string is always returned by writeTmp. |
| ## # So is this needed? |
| ## try: |
| ## t1 = writeTmp(1, ["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"]) |
| ## finally: |
| ## remove_tempfiles(t1) |
| |
| def test_fileno(self): |
| t1 = t2 = None |
| 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 |
| t1 = None |
| try: |
| # try opening in universal newline mode |
| t1 = writeTmp(1, [b"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 |
| |
| class CustomOpenHook: |
| def __init__(self): |
| self.invoked = False |
| def __call__(self, *args): |
| self.invoked = True |
| return open(*args) |
| |
| t = writeTmp(1, ["\n"]) |
| self.addCleanup(remove_tempfiles, t) |
| 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_context_manager(self): |
| try: |
| t1 = writeTmp(1, ["A\nB\nC"]) |
| t2 = writeTmp(2, ["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, ()) |
| finally: |
| remove_tempfiles(t1, t2) |
| |
| def test_close_on_exception(self): |
| try: |
| t1 = writeTmp(1, [""]) |
| with FileInput(files=t1) as fi: |
| raise IOError |
| except IOError: |
| self.assertEqual(fi._files, ()) |
| finally: |
| remove_tempfiles(t1) |
| |
| def test_empty_files_list_specified_to_constructor(self): |
| with FileInput(files=[]) as fi: |
| self.assertEqual(fi._files, ('-',)) |
| |
| def test__getitem__(self): |
| """Tests invoking FileInput.__getitem__() with the current |
| line number""" |
| t = writeTmp(1, ["line1\n", "line2\n"]) |
| self.addCleanup(remove_tempfiles, t) |
| 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__invalid_key(self): |
| """Tests invoking FileInput.__getitem__() with an index unequal to |
| the line number""" |
| t = writeTmp(1, ["line1\n", "line2\n"]) |
| self.addCleanup(remove_tempfiles, t) |
| with FileInput(files=[t]) as fi: |
| with self.assertRaises(RuntimeError) as cm: |
| fi[1] |
| self.assertEqual(cm.exception.args, ("accessing lines out of order",)) |
| |
| def test__getitem__eof(self): |
| """Tests invoking FileInput.__getitem__() with the line number but at |
| end-of-input""" |
| t = writeTmp(1, []) |
| self.addCleanup(remove_tempfiles, t) |
| 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 = writeTmp(1, ["\n"]) |
| self.addCleanup(remove_tempfiles, t) |
| 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 = writeTmp(1, ["\n"]) |
| self.addCleanup(remove_tempfiles, t) |
| 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") |
| |
| @unittest.skipIf(not hasattr(os, "chmod"), "os.chmod does not exist") |
| 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 = writeTmp(1, ["\n"]) |
| self.addCleanup(remove_tempfiles, t) |
| 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 = writeTmp(1, ["\n"]) |
| self.addCleanup(remove_tempfiles, t) |
| 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") |
| |
| class MockFileInput: |
| """A class that mocks out fileinput.FileInput for use during unit tests""" |
| |
| def __init__(self, files=None, inplace=False, backup="", bufsize=0, |
| mode="r", openhook=None): |
| self.files = files |
| self.inplace = inplace |
| self.backup = backup |
| self.bufsize = bufsize |
| 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() |
| bufsize = object() |
| mode = object() |
| openhook = object() |
| |
| # call fileinput.input() with different values for each argument |
| result = fileinput.input(files=files, inplace=inplace, backup=backup, |
| bufsize=bufsize, |
| 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(bufsize, result.bufsize, "bufsize") |
| 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() |
| result = fileinput.hook_encoded(encoding) |
| |
| 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.assertFalse(kwargs) |
| |
| def test_main(): |
| run_unittest( |
| BufferSizesTests, |
| FileInputTests, |
| Test_fileinput_input, |
| Test_fileinput_close, |
| Test_fileinput_nextfile, |
| Test_fileinput_filename, |
| Test_fileinput_lineno, |
| Test_fileinput_filelineno, |
| Test_fileinput_fileno, |
| Test_fileinput_isfirstline, |
| Test_fileinput_isstdin, |
| Test_hook_compressed, |
| Test_hook_encoded, |
| ) |
| |
| if __name__ == "__main__": |
| test_main() |