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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"""Testing `tabnanny` module. Glossary: * errored : Whitespace related problems present in file. """ from unittest import TestCase, mock import errno import os import tabnanny import tokenize import tempfile import textwrap from test.support import (captured_stderr, captured_stdout, script_helper, findfile, unlink) SOURCE_CODES = { "incomplete_expression": ( 'fruits = [\n' ' "Apple",\n' ' "Orange",\n' ' "Banana",\n' '\n' 'print(fruits)\n' ), "wrong_indented": ( 'if True:\n' ' print("hello")\n' ' print("world")\n' 'else:\n' ' print("else called")\n' ), "nannynag_errored": ( 'if True:\n' ' \tprint("hello")\n' '\tprint("world")\n' 'else:\n' ' print("else called")\n' ), "error_free": ( 'if True:\n' ' print("hello")\n' ' print("world")\n' 'else:\n' ' print("else called")\n' ), "tab_space_errored_1": ( 'def my_func():\n' '\t print("hello world")\n' '\t if True:\n' '\t\tprint("If called")' ), "tab_space_errored_2": ( 'def my_func():\n' '\t\tprint("Hello world")\n' '\t\tif True:\n' '\t print("If called")' ) } class TemporaryPyFile: """Create a temporary python source code file.""" def __init__(self, source_code='', directory=None): self.source_code = source_code self.dir = directory def __enter__(self): with tempfile.NamedTemporaryFile( mode='w', dir=self.dir, suffix=".py", delete=False ) as f: f.write(self.source_code) self.file_path = f.name return self.file_path def __exit__(self, exc_type, exc_value, exc_traceback): unlink(self.file_path) class TestFormatWitnesses(TestCase): """Testing `tabnanny.format_witnesses()`.""" def test_format_witnesses(self): """Asserting formatter result by giving various input samples.""" tests = [ ('Test', 'at tab sizes T, e, s, t'), ('', 'at tab size '), ('t', 'at tab size t'), (' t ', 'at tab sizes , , t, , '), ] for words, expected in tests: with self.subTest(words=words, expected=expected): self.assertEqual(tabnanny.format_witnesses(words), expected) class TestErrPrint(TestCase): """Testing `tabnanny.errprint()`.""" def test_errprint(self): """Asserting result of `tabnanny.errprint()` by giving sample inputs.""" tests = [ (['first', 'second'], 'first second\n'), (['first'], 'first\n'), ([1, 2, 3], '1 2 3\n'), ([], '\n') ] for args, expected in tests: with self.subTest(arguments=args, expected=expected): with captured_stderr() as stderr: tabnanny.errprint(*args) self.assertEqual(stderr.getvalue() , expected) class TestNannyNag(TestCase): def test_all_methods(self): """Asserting behaviour of `tabnanny.NannyNag` exception.""" tests = [ ( tabnanny.NannyNag(0, "foo", "bar"), {'lineno': 0, 'msg': 'foo', 'line': 'bar'} ), ( tabnanny.NannyNag(5, "testmsg", "testline"), {'lineno': 5, 'msg': 'testmsg', 'line': 'testline'} ) ] for nanny, expected in tests: line_number = nanny.get_lineno() msg = nanny.get_msg() line = nanny.get_line() with self.subTest( line_number=line_number, expected=expected['lineno'] ): self.assertEqual(expected['lineno'], line_number) with self.subTest(msg=msg, expected=expected['msg']): self.assertEqual(expected['msg'], msg) with self.subTest(line=line, expected=expected['line']): self.assertEqual(expected['line'], line) class TestCheck(TestCase): """Testing tabnanny.check().""" def setUp(self): self.addCleanup(setattr, tabnanny, 'verbose', tabnanny.verbose) tabnanny.verbose = 0 # Forcefully deactivating verbose mode. def verify_tabnanny_check(self, dir_or_file, out="", err=""): """Common verification for tabnanny.check(). Use this method to assert expected values of `stdout` and `stderr` after running tabnanny.check() on given `dir` or `file` path. Because tabnanny.check() captures exceptions and writes to `stdout` and `stderr`, asserting standard outputs is the only way. """ with captured_stdout() as stdout, captured_stderr() as stderr: tabnanny.check(dir_or_file) self.assertEqual(stdout.getvalue(), out) self.assertEqual(stderr.getvalue(), err) def test_correct_file(self): """A python source code file without any errors.""" with TemporaryPyFile(SOURCE_CODES["error_free"]) as file_path: self.verify_tabnanny_check(file_path) def test_correct_directory_verbose(self): """Directory containing few error free python source code files. Because order of files returned by `os.lsdir()` is not fixed, verify the existence of each output lines at `stdout` using `in` operator. `verbose` mode of `tabnanny.verbose` asserts `stdout`. """ with tempfile.TemporaryDirectory() as tmp_dir: lines = [f"{tmp_dir!r}: listing directory\n",] file1 = TemporaryPyFile(SOURCE_CODES["error_free"], directory=tmp_dir) file2 = TemporaryPyFile(SOURCE_CODES["error_free"], directory=tmp_dir) with file1 as file1_path, file2 as file2_path: for file_path in (file1_path, file2_path): lines.append(f"{file_path!r}: Clean bill of health.\n") tabnanny.verbose = 1 with captured_stdout() as stdout, captured_stderr() as stderr: tabnanny.check(tmp_dir) stdout = stdout.getvalue() for line in lines: with self.subTest(line=line): self.assertIn(line, stdout) self.assertEqual(stderr.getvalue(), "") def test_correct_directory(self): """Directory which contains few error free python source code files.""" with tempfile.TemporaryDirectory() as tmp_dir: with TemporaryPyFile(SOURCE_CODES["error_free"], directory=tmp_dir): self.verify_tabnanny_check(tmp_dir) def test_when_wrong_indented(self): """A python source code file eligible for raising `IndentationError`.""" with TemporaryPyFile(SOURCE_CODES["wrong_indented"]) as file_path: err = ('unindent does not match any outer indentation level' ' (, line 3)\n') err = f"{file_path!r}: Indentation Error: {err}" self.verify_tabnanny_check(file_path, err=err) def test_when_tokenize_tokenerror(self): """A python source code file eligible for raising 'tokenize.TokenError'.""" with TemporaryPyFile(SOURCE_CODES["incomplete_expression"]) as file_path: err = "('EOF in multi-line statement', (7, 0))\n" err = f"{file_path!r}: Token Error: {err}" self.verify_tabnanny_check(file_path, err=err) def test_when_nannynag_error_verbose(self): """A python source code file eligible for raising `tabnanny.NannyNag`. Tests will assert `stdout` after activating `tabnanny.verbose` mode. """ with TemporaryPyFile(SOURCE_CODES["nannynag_errored"]) as file_path: out = f"{file_path!r}: *** Line 3: trouble in tab city! ***\n" out += "offending line: '\\tprint(\"world\")\\n'\n" out += "indent not equal e.g. at tab size 1\n" tabnanny.verbose = 1 self.verify_tabnanny_check(file_path, out=out) def test_when_nannynag_error(self): """A python source code file eligible for raising `tabnanny.NannyNag`.""" with TemporaryPyFile(SOURCE_CODES["nannynag_errored"]) as file_path: out = f"{file_path} 3 '\\tprint(\"world\")\\n'\n" self.verify_tabnanny_check(file_path, out=out) def test_when_no_file(self): """A python file which does not exist actually in system.""" path = 'no_file.py' err = (f"{path!r}: I/O Error: [Errno {errno.ENOENT}] " f"{os.strerror(errno.ENOENT)}: {path!r}\n") self.verify_tabnanny_check(path, err=err) def test_errored_directory(self): """Directory containing wrongly indented python source code files.""" with tempfile.TemporaryDirectory() as tmp_dir: error_file = TemporaryPyFile( SOURCE_CODES["wrong_indented"], directory=tmp_dir ) code_file = TemporaryPyFile( SOURCE_CODES["error_free"], directory=tmp_dir ) with error_file as e_file, code_file as c_file: err = ('unindent does not match any outer indentation level' ' (, line 3)\n') err = f"{e_file!r}: Indentation Error: {err}" self.verify_tabnanny_check(tmp_dir, err=err) class TestProcessTokens(TestCase): """Testing `tabnanny.process_tokens()`.""" @mock.patch('tabnanny.NannyNag') def test_with_correct_code(self, MockNannyNag): """A python source code without any whitespace related problems.""" with TemporaryPyFile(SOURCE_CODES["error_free"]) as file_path: with open(file_path) as f: tabnanny.process_tokens(tokenize.generate_tokens(f.readline)) self.assertFalse(MockNannyNag.called) def test_with_errored_codes_samples(self): """A python source code with whitespace related sampled problems.""" # "tab_space_errored_1": executes block under type == tokenize.INDENT # at `tabnanny.process_tokens()`. # "tab space_errored_2": executes block under # `check_equal and type not in JUNK` condition at # `tabnanny.process_tokens()`. for key in ["tab_space_errored_1", "tab_space_errored_2"]: with self.subTest(key=key): with TemporaryPyFile(SOURCE_CODES[key]) as file_path: with open(file_path) as f: tokens = tokenize.generate_tokens(f.readline) with self.assertRaises(tabnanny.NannyNag): tabnanny.process_tokens(tokens) class TestCommandLine(TestCase): """Tests command line interface of `tabnanny`.""" def validate_cmd(self, *args, stdout="", stderr="", partial=False): """Common function to assert the behaviour of command line interface.""" _, out, err = script_helper.assert_python_ok('-m', 'tabnanny', *args) # Note: The `splitlines()` will solve the problem of CRLF(\r) added # by OS Windows. out = os.fsdecode(out) err = os.fsdecode(err) if partial: for std, output in ((stdout, out), (stderr, err)): _output = output.splitlines() for _std in std.splitlines(): with self.subTest(std=_std, output=_output): self.assertIn(_std, _output) else: self.assertListEqual(out.splitlines(), stdout.splitlines()) self.assertListEqual(err.splitlines(), stderr.splitlines()) def test_with_errored_file(self): """Should displays error when errored python file is given.""" with TemporaryPyFile(SOURCE_CODES["wrong_indented"]) as file_path: stderr = f"{file_path!r}: Indentation Error: " stderr += ('unindent does not match any outer indentation level' ' (, line 3)') self.validate_cmd(file_path, stderr=stderr) def test_with_error_free_file(self): """Should not display anything if python file is correctly indented.""" with TemporaryPyFile(SOURCE_CODES["error_free"]) as file_path: self.validate_cmd(file_path) def test_command_usage(self): """Should display usage on no arguments.""" path = findfile('tabnanny.py') stderr = f"Usage: {path} [-v] file_or_directory ..." self.validate_cmd(stderr=stderr) def test_quiet_flag(self): """Should display less when quite mode is on.""" with TemporaryPyFile(SOURCE_CODES["nannynag_errored"]) as file_path: stdout = f"{file_path}\n" self.validate_cmd("-q", file_path, stdout=stdout) def test_verbose_mode(self): """Should display more error information if verbose mode is on.""" with TemporaryPyFile(SOURCE_CODES["nannynag_errored"]) as path: stdout = textwrap.dedent( "offending line: '\\tprint(\"world\")\\n'" ).strip() self.validate_cmd("-v", path, stdout=stdout, partial=True) def test_double_verbose_mode(self): """Should display detailed error information if double verbose is on.""" with TemporaryPyFile(SOURCE_CODES["nannynag_errored"]) as path: stdout = textwrap.dedent( "offending line: '\\tprint(\"world\")\\n'" ).strip() self.validate_cmd("-vv", path, stdout=stdout, partial=True)