# Argument Clinic # Copyright 2012-2013 by Larry Hastings. # Licensed to the PSF under a contributor agreement. # import builtins import clinic from clinic import DSLParser import collections import inspect from test import support import sys import unittest from unittest import TestCase class FakeConverter: def __init__(self, name, args): self.name = name self.args = args class FakeConverterFactory: def __init__(self, name): self.name = name def __call__(self, name, default, **kwargs): return FakeConverter(self.name, kwargs) class FakeConvertersDict: def __init__(self): self.used_converters = {} def get(self, name, default): return self.used_converters.setdefault(name, FakeConverterFactory(name)) class FakeClinic: def __init__(self): self.converters = FakeConvertersDict() self.legacy_converters = FakeConvertersDict() self.language = clinic.CLanguage() self.filename = None self.block_parser = clinic.BlockParser('', self.language) self.modules = collections.OrderedDict() clinic.clinic = self self.name = "FakeClinic" def is_directive(self, name): return name == "module" def directive(self, name, args): self.called_directives[name] = args _module_and_class = clinic.Clinic._module_and_class class ClinicWholeFileTest(TestCase): def test_eol(self): # regression test: # clinic's block parser didn't recognize # the "end line" for the block if it # didn't end in "\n" (as in, the last) # byte of the file was '/'. # so it woudl spit out an end line for you. # and since you really already had one, # the last line of the block got corrupted. c = clinic.Clinic(clinic.CLanguage()) raw = "/*[clinic]\nfoo\n[clinic]*/" cooked = c.parse(raw).splitlines() end_line = cooked[2].rstrip() # this test is redundant, it's just here explicitly to catch # the regression test so we don't forget what it looked like self.assertNotEqual(end_line, "[clinic]*/[clinic]*/") self.assertEqual(end_line, "[clinic]*/") class ClinicGroupPermuterTest(TestCase): def _test(self, l, m, r, output): computed = clinic.permute_optional_groups(l, m, r) self.assertEqual(output, computed) def test_range(self): self._test([['start']], ['stop'], [['step']], ( ('stop',), ('start', 'stop',), ('start', 'stop', 'step',), )) def test_add_window(self): self._test([['x', 'y']], ['ch'], [['attr']], ( ('ch',), ('ch', 'attr'), ('x', 'y', 'ch',), ('x', 'y', 'ch', 'attr'), )) def test_ludicrous(self): self._test([['a1', 'a2', 'a3'], ['b1', 'b2']], ['c1'], [['d1', 'd2'], ['e1', 'e2', 'e3']], ( ('c1',), ('b1', 'b2', 'c1'), ('b1', 'b2', 'c1', 'd1', 'd2'), ('a1', 'a2', 'a3', 'b1', 'b2', 'c1'), ('a1', 'a2', 'a3', 'b1', 'b2', 'c1', 'd1', 'd2'), ('a1', 'a2', 'a3', 'b1', 'b2', 'c1', 'd1', 'd2', 'e1', 'e2', 'e3'), )) def test_right_only(self): self._test([], [], [['a'],['b'],['c']], ( (), ('a',), ('a', 'b'), ('a', 'b', 'c') )) def test_have_left_options_but_required_is_empty(self): def fn(): clinic.permute_optional_groups(['a'], [], []) self.assertRaises(AssertionError, fn) class ClinicLinearFormatTest(TestCase): def _test(self, input, output, **kwargs): computed = clinic.linear_format(input, **kwargs) self.assertEqual(output, computed) def test_empty_strings(self): self._test('', '') def test_solo_newline(self): self._test('\n', '\n') def test_no_substitution(self): self._test(""" abc """, """ abc """) def test_empty_substitution(self): self._test(""" abc {name} def """, """ abc def """, name='') def test_single_line_substitution(self): self._test(""" abc {name} def """, """ abc GARGLE def """, name='GARGLE') def test_multiline_substitution(self): self._test(""" abc {name} def """, """ abc bingle bungle def """, name='bingle\nbungle\n') class InertParser: def __init__(self, clinic): pass def parse(self, block): pass class CopyParser: def __init__(self, clinic): pass def parse(self, block): block.output = block.input class ClinicBlockParserTest(TestCase): def _test(self, input, output): language = clinic.CLanguage() blocks = list(clinic.BlockParser(input, language)) writer = clinic.BlockPrinter(language) for block in blocks: writer.print_block(block) output = writer.f.getvalue() assert output == input, "output != input!\n\noutput " + repr(output) + "\n\n input " + repr(input) def round_trip(self, input): return self._test(input, input) def test_round_trip_1(self): self.round_trip(""" verbatim text here lah dee dah """) def test_round_trip_2(self): self.round_trip(""" verbatim text here lah dee dah /*[inert] abc [inert]*/ def /*[inert checksum: 7b18d017f89f61cf17d47f92749ea6930a3f1deb]*/ xyz """) def _test_clinic(self, input, output): language = clinic.CLanguage() c = clinic.Clinic(language) c.parsers['inert'] = InertParser(c) c.parsers['copy'] = CopyParser(c) computed = c.parse(input) self.assertEqual(output, computed) def test_clinic_1(self): self._test_clinic(""" verbatim text here lah dee dah /*[copy input] def [copy start generated code]*/ abc /*[copy end generated code: checksum=03cfd743661f07975fa2f1220c5194cbaff48451]*/ xyz """, """ verbatim text here lah dee dah /*[copy input] def [copy start generated code]*/ def /*[copy end generated code: checksum=7b18d017f89f61cf17d47f92749ea6930a3f1deb]*/ xyz """) class ClinicParserTest(TestCase): def test_trivial(self): parser = DSLParser(FakeClinic()) block = clinic.Block("module os\nos.access") parser.parse(block) module, function = block.signatures self.assertEqual("access", function.name) self.assertEqual("os", module.name) def test_ignore_line(self): block = self.parse("#\nmodule os\nos.access") module, function = block.signatures self.assertEqual("access", function.name) self.assertEqual("os", module.name) def test_param(self): function = self.parse_function("module os\nos.access\n path: int") self.assertEqual("access", function.name) self.assertEqual(1, len(function.parameters)) p = function.parameters['path'] self.assertEqual('path', p.name) self.assertIsInstance(p.converter, clinic.int_converter) def test_param_default(self): function = self.parse_function("module os\nos.access\n follow_symlinks: bool = True") p = function.parameters['follow_symlinks'] self.assertEqual(True, p.default) def test_param_with_continuations(self): function = self.parse_function("module os\nos.access\n follow_symlinks: \\\n bool \\\n =\\\n True") p = function.parameters['follow_symlinks'] self.assertEqual(True, p.default) def test_param_default_expression(self): function = self.parse_function("module os\nos.access\n follow_symlinks: int(c_default='MAXSIZE') = sys.maxsize") p = function.parameters['follow_symlinks'] self.assertEqual(sys.maxsize, p.default) self.assertEqual("MAXSIZE", p.converter.c_default) s = self.parse_function_should_fail("module os\nos.access\n follow_symlinks: int = sys.maxsize") self.assertEqual(s, "Error on line 0:\nWhen you specify a named constant ('sys.maxsize') as your default value,\nyou MUST specify a valid c_default.\n") def test_param_no_docstring(self): function = self.parse_function(""" module os os.access follow_symlinks: bool = True something_else: str""") p = function.parameters['follow_symlinks'] self.assertEqual(2, len(function.parameters)) self.assertIsInstance(function.parameters['something_else'].converter, clinic.str_converter) def disabled_test_converter_arguments(self): function = self.parse_function("module os\nos.access\n path: path_t(allow_fd=1)") p = function.parameters['path'] self.assertEqual(1, p.converter.args['allow_fd']) def test_function_docstring(self): function = self.parse_function(""" module os os.stat as os_stat_fn path: str Path to be examined Perform a stat system call on the given path.""") self.assertEqual(""" stat(path) Perform a stat system call on the given path. path Path to be examined """.strip(), function.docstring) def test_explicit_parameters_in_docstring(self): function = self.parse_function(""" module foo foo.bar x: int Documentation for x. y: int This is the documentation for foo. Okay, we're done here. """) self.assertEqual(""" bar(x, y) This is the documentation for foo. x Documentation for x. Okay, we're done here. """.strip(), function.docstring) def test_parser_regression_special_character_in_parameter_column_of_docstring_first_line(self): function = self.parse_function(""" module os os.stat path: str This/used to break Clinic! """) self.assertEqual("os.stat(path)\n\nThis/used to break Clinic!", function.docstring) def test_c_name(self): function = self.parse_function("module os\nos.stat as os_stat_fn") self.assertEqual("os_stat_fn", function.c_basename) def test_return_converter(self): function = self.parse_function("module os\nos.stat -> int") self.assertIsInstance(function.return_converter, clinic.int_return_converter) def test_star(self): function = self.parse_function("module os\nos.access\n *\n follow_symlinks: bool = True") p = function.parameters['follow_symlinks'] self.assertEqual(inspect.Parameter.KEYWORD_ONLY, p.kind) self.assertEqual(0, p.group) def test_group(self): function = self.parse_function("module window\nwindow.border\n [\n ls : int\n ]\n /\n") p = function.parameters['ls'] self.assertEqual(1, p.group) def test_left_group(self): function = self.parse_function(""" module curses curses.addch [ y: int Y-coordinate. x: int X-coordinate. ] ch: char Character to add. [ attr: long Attributes for the character. ] / """) for name, group in ( ('y', -1), ('x', -1), ('ch', 0), ('attr', 1), ): p = function.parameters[name] self.assertEqual(p.group, group) self.assertEqual(p.kind, inspect.Parameter.POSITIONAL_ONLY) self.assertEqual(function.docstring.strip(), """ addch([y, x,] ch, [attr]) y Y-coordinate. x X-coordinate. ch Character to add. attr Attributes for the character. """.strip()) def test_nested_groups(self): function = self.parse_function(""" module curses curses.imaginary [ [ y1: int Y-coordinate. y2: int Y-coordinate. ] x1: int X-coordinate. x2: int X-coordinate. ] ch: char Character to add. [ attr1: long Attributes for the character. attr2: long Attributes for the character. attr3: long Attributes for the character. [ attr4: long Attributes for the character. attr5: long Attributes for the character. attr6: long Attributes for the character. ] ] / """) for name, group in ( ('y1', -2), ('y2', -2), ('x1', -1), ('x2', -1), ('ch', 0), ('attr1', 1), ('attr2', 1), ('attr3', 1), ('attr4', 2), ('attr5', 2), ('attr6', 2), ): p = function.parameters[name] self.assertEqual(p.group, group) self.assertEqual(p.kind, inspect.Parameter.POSITIONAL_ONLY) self.assertEqual(function.docstring.strip(), """ imaginary([[y1, y2,] x1, x2,] ch, [attr1, attr2, attr3, [attr4, attr5, attr6]]) y1 Y-coordinate. y2 Y-coordinate. x1 X-coordinate. x2 X-coordinate. ch Character to add. attr1 Attributes for the character. attr2 Attributes for the character. attr3 Attributes for the character. attr4 Attributes for the character. attr5 Attributes for the character. attr6 Attributes for the character. """.strip()) def parse_function_should_fail(self, s): with support.captured_stdout() as stdout: with self.assertRaises(SystemExit): self.parse_function(s) return stdout.getvalue() def test_disallowed_grouping__two_top_groups_on_left(self): s = self.parse_function_should_fail(""" module foo foo.two_top_groups_on_left [ group1 : int ] [ group2 : int ] param: int """) self.assertEqual(s, ('Error on line 0:\n' 'Function two_top_groups_on_left has an unsupported group configuration. (Unexpected state 2)\n')) def test_disallowed_grouping__two_top_groups_on_right(self): self.parse_function_should_fail(""" module foo foo.two_top_groups_on_right param: int [ group1 : int ] [ group2 : int ] """) def test_disallowed_grouping__parameter_after_group_on_right(self): self.parse_function_should_fail(""" module foo foo.parameter_after_group_on_right param: int [ [ group1 : int ] group2 : int ] """) def test_disallowed_grouping__group_after_parameter_on_left(self): self.parse_function_should_fail(""" module foo foo.group_after_parameter_on_left [ group2 : int [ group1 : int ] ] param: int """) def test_disallowed_grouping__empty_group_on_left(self): self.parse_function_should_fail(""" module foo foo.empty_group [ [ ] group2 : int ] param: int """) def test_disallowed_grouping__empty_group_on_right(self): self.parse_function_should_fail(""" module foo foo.empty_group param: int [ [ ] group2 : int ] """) def test_no_parameters(self): function = self.parse_function(""" module foo foo.bar Docstring """) self.assertEqual("bar()\nDocstring", function.docstring) self.assertEqual(0, len(function.parameters)) def test_illegal_module_line(self): self.parse_function_should_fail(""" module foo foo.bar => int / """) def test_illegal_c_basename(self): self.parse_function_should_fail(""" module foo foo.bar as 935 / """) def test_single_star(self): self.parse_function_should_fail(""" module foo foo.bar * * """) def test_parameters_required_after_star_without_initial_parameters_or_docstring(self): self.parse_function_should_fail(""" module foo foo.bar * """) def test_parameters_required_after_star_without_initial_parameters_with_docstring(self): self.parse_function_should_fail(""" module foo foo.bar * Docstring here. """) def test_parameters_required_after_star_with_initial_parameters_without_docstring(self): self.parse_function_should_fail(""" module foo foo.bar this: int * """) def test_parameters_required_after_star_with_initial_parameters_and_docstring(self): self.parse_function_should_fail(""" module foo foo.bar this: int * Docstring. """) def test_single_slash(self): self.parse_function_should_fail(""" module foo foo.bar / / """) def test_mix_star_and_slash(self): self.parse_function_should_fail(""" module foo foo.bar x: int y: int * z: int / """) def test_parameters_not_permitted_after_slash_for_now(self): self.parse_function_should_fail(""" module foo foo.bar / x: int """) def test_function_not_at_column_0(self): function = self.parse_function(""" module foo foo.bar x: int Nested docstring here, goeth. * y: str Not at column 0! """) self.assertEqual(""" bar(x, *, y) Not at column 0! x Nested docstring here, goeth. """.strip(), function.docstring) def test_parser_regression_special_character_in_parameter_column_of_docstring_first_line(self): function = self.parse_function(""" module os os.stat path: str This/used to break Clinic! """) self.assertEqual("stat(path)\nThis/used to break Clinic!", function.docstring) def test_directive(self): c = FakeClinic() parser = DSLParser(c) parser.flag = False parser.directives['setflag'] = lambda : setattr(parser, 'flag', True) block = clinic.Block("setflag") parser.parse(block) self.assertTrue(parser.flag) def test_legacy_converters(self): block = self.parse('module os\nos.access\n path: "s"') module, function = block.signatures self.assertIsInstance((function.parameters['path']).converter, clinic.str_converter) def parse(self, text): c = FakeClinic() parser = DSLParser(c) block = clinic.Block(text) parser.parse(block) return block def parse_function(self, text): block = self.parse(text) s = block.signatures self.assertEqual(len(s), 2) assert isinstance(s[0], clinic.Module) assert isinstance(s[1], clinic.Function) return s[1] def test_scaffolding(self): # test repr on special values self.assertEqual(repr(clinic.unspecified), '') self.assertEqual(repr(clinic.NULL), '') # test that fail fails with support.captured_stdout() as stdout: with self.assertRaises(SystemExit): clinic.fail('The igloos are melting!', filename='clown.txt', line_number=69) self.assertEqual(stdout.getvalue(), 'Error in file "clown.txt" on line 69:\nThe igloos are melting!\n') if __name__ == "__main__": unittest.main()