332 lines
13 KiB
Python
332 lines
13 KiB
Python
# testing.py
|
|
|
|
from contextlib import contextmanager
|
|
import typing
|
|
|
|
from .core import (
|
|
ParserElement,
|
|
ParseException,
|
|
Keyword,
|
|
__diag__,
|
|
__compat__,
|
|
)
|
|
|
|
|
|
class pyparsing_test:
|
|
"""
|
|
namespace class for classes useful in writing unit tests
|
|
"""
|
|
|
|
class reset_pyparsing_context:
|
|
"""
|
|
Context manager to be used when writing unit tests that modify pyparsing config values:
|
|
- packrat parsing
|
|
- bounded recursion parsing
|
|
- default whitespace characters.
|
|
- default keyword characters
|
|
- literal string auto-conversion class
|
|
- __diag__ settings
|
|
|
|
Example::
|
|
|
|
with reset_pyparsing_context():
|
|
# test that literals used to construct a grammar are automatically suppressed
|
|
ParserElement.inlineLiteralsUsing(Suppress)
|
|
|
|
term = Word(alphas) | Word(nums)
|
|
group = Group('(' + term[...] + ')')
|
|
|
|
# assert that the '()' characters are not included in the parsed tokens
|
|
self.assertParseAndCheckList(group, "(abc 123 def)", ['abc', '123', 'def'])
|
|
|
|
# after exiting context manager, literals are converted to Literal expressions again
|
|
"""
|
|
|
|
def __init__(self):
|
|
self._save_context = {}
|
|
|
|
def save(self):
|
|
self._save_context["default_whitespace"] = ParserElement.DEFAULT_WHITE_CHARS
|
|
self._save_context["default_keyword_chars"] = Keyword.DEFAULT_KEYWORD_CHARS
|
|
|
|
self._save_context[
|
|
"literal_string_class"
|
|
] = ParserElement._literalStringClass
|
|
|
|
self._save_context["verbose_stacktrace"] = ParserElement.verbose_stacktrace
|
|
|
|
self._save_context["packrat_enabled"] = ParserElement._packratEnabled
|
|
if ParserElement._packratEnabled:
|
|
self._save_context[
|
|
"packrat_cache_size"
|
|
] = ParserElement.packrat_cache.size
|
|
else:
|
|
self._save_context["packrat_cache_size"] = None
|
|
self._save_context["packrat_parse"] = ParserElement._parse
|
|
self._save_context[
|
|
"recursion_enabled"
|
|
] = ParserElement._left_recursion_enabled
|
|
|
|
self._save_context["__diag__"] = {
|
|
name: getattr(__diag__, name) for name in __diag__._all_names
|
|
}
|
|
|
|
self._save_context["__compat__"] = {
|
|
"collect_all_And_tokens": __compat__.collect_all_And_tokens
|
|
}
|
|
|
|
return self
|
|
|
|
def restore(self):
|
|
# reset pyparsing global state
|
|
if (
|
|
ParserElement.DEFAULT_WHITE_CHARS
|
|
!= self._save_context["default_whitespace"]
|
|
):
|
|
ParserElement.set_default_whitespace_chars(
|
|
self._save_context["default_whitespace"]
|
|
)
|
|
|
|
ParserElement.verbose_stacktrace = self._save_context["verbose_stacktrace"]
|
|
|
|
Keyword.DEFAULT_KEYWORD_CHARS = self._save_context["default_keyword_chars"]
|
|
ParserElement.inlineLiteralsUsing(
|
|
self._save_context["literal_string_class"]
|
|
)
|
|
|
|
for name, value in self._save_context["__diag__"].items():
|
|
(__diag__.enable if value else __diag__.disable)(name)
|
|
|
|
ParserElement._packratEnabled = False
|
|
if self._save_context["packrat_enabled"]:
|
|
ParserElement.enable_packrat(self._save_context["packrat_cache_size"])
|
|
else:
|
|
ParserElement._parse = self._save_context["packrat_parse"]
|
|
ParserElement._left_recursion_enabled = self._save_context[
|
|
"recursion_enabled"
|
|
]
|
|
|
|
__compat__.collect_all_And_tokens = self._save_context["__compat__"]
|
|
|
|
return self
|
|
|
|
def copy(self):
|
|
ret = type(self)()
|
|
ret._save_context.update(self._save_context)
|
|
return ret
|
|
|
|
def __enter__(self):
|
|
return self.save()
|
|
|
|
def __exit__(self, *args):
|
|
self.restore()
|
|
|
|
class TestParseResultsAsserts:
|
|
"""
|
|
A mixin class to add parse results assertion methods to normal unittest.TestCase classes.
|
|
"""
|
|
|
|
def assertParseResultsEquals(
|
|
self, result, expected_list=None, expected_dict=None, msg=None
|
|
):
|
|
"""
|
|
Unit test assertion to compare a :class:`ParseResults` object with an optional ``expected_list``,
|
|
and compare any defined results names with an optional ``expected_dict``.
|
|
"""
|
|
if expected_list is not None:
|
|
self.assertEqual(expected_list, result.as_list(), msg=msg)
|
|
if expected_dict is not None:
|
|
self.assertEqual(expected_dict, result.as_dict(), msg=msg)
|
|
|
|
def assertParseAndCheckList(
|
|
self, expr, test_string, expected_list, msg=None, verbose=True
|
|
):
|
|
"""
|
|
Convenience wrapper assert to test a parser element and input string, and assert that
|
|
the resulting ``ParseResults.asList()`` is equal to the ``expected_list``.
|
|
"""
|
|
result = expr.parse_string(test_string, parse_all=True)
|
|
if verbose:
|
|
print(result.dump())
|
|
else:
|
|
print(result.as_list())
|
|
self.assertParseResultsEquals(result, expected_list=expected_list, msg=msg)
|
|
|
|
def assertParseAndCheckDict(
|
|
self, expr, test_string, expected_dict, msg=None, verbose=True
|
|
):
|
|
"""
|
|
Convenience wrapper assert to test a parser element and input string, and assert that
|
|
the resulting ``ParseResults.asDict()`` is equal to the ``expected_dict``.
|
|
"""
|
|
result = expr.parse_string(test_string, parseAll=True)
|
|
if verbose:
|
|
print(result.dump())
|
|
else:
|
|
print(result.as_list())
|
|
self.assertParseResultsEquals(result, expected_dict=expected_dict, msg=msg)
|
|
|
|
def assertRunTestResults(
|
|
self, run_tests_report, expected_parse_results=None, msg=None
|
|
):
|
|
"""
|
|
Unit test assertion to evaluate output of ``ParserElement.runTests()``. If a list of
|
|
list-dict tuples is given as the ``expected_parse_results`` argument, then these are zipped
|
|
with the report tuples returned by ``runTests`` and evaluated using ``assertParseResultsEquals``.
|
|
Finally, asserts that the overall ``runTests()`` success value is ``True``.
|
|
|
|
:param run_tests_report: tuple(bool, [tuple(str, ParseResults or Exception)]) returned from runTests
|
|
:param expected_parse_results (optional): [tuple(str, list, dict, Exception)]
|
|
"""
|
|
run_test_success, run_test_results = run_tests_report
|
|
|
|
if expected_parse_results is not None:
|
|
merged = [
|
|
(*rpt, expected)
|
|
for rpt, expected in zip(run_test_results, expected_parse_results)
|
|
]
|
|
for test_string, result, expected in merged:
|
|
# expected should be a tuple containing a list and/or a dict or an exception,
|
|
# and optional failure message string
|
|
# an empty tuple will skip any result validation
|
|
fail_msg = next(
|
|
(exp for exp in expected if isinstance(exp, str)), None
|
|
)
|
|
expected_exception = next(
|
|
(
|
|
exp
|
|
for exp in expected
|
|
if isinstance(exp, type) and issubclass(exp, Exception)
|
|
),
|
|
None,
|
|
)
|
|
if expected_exception is not None:
|
|
with self.assertRaises(
|
|
expected_exception=expected_exception, msg=fail_msg or msg
|
|
):
|
|
if isinstance(result, Exception):
|
|
raise result
|
|
else:
|
|
expected_list = next(
|
|
(exp for exp in expected if isinstance(exp, list)), None
|
|
)
|
|
expected_dict = next(
|
|
(exp for exp in expected if isinstance(exp, dict)), None
|
|
)
|
|
if (expected_list, expected_dict) != (None, None):
|
|
self.assertParseResultsEquals(
|
|
result,
|
|
expected_list=expected_list,
|
|
expected_dict=expected_dict,
|
|
msg=fail_msg or msg,
|
|
)
|
|
else:
|
|
# warning here maybe?
|
|
print("no validation for {!r}".format(test_string))
|
|
|
|
# do this last, in case some specific test results can be reported instead
|
|
self.assertTrue(
|
|
run_test_success, msg=msg if msg is not None else "failed runTests"
|
|
)
|
|
|
|
@contextmanager
|
|
def assertRaisesParseException(self, exc_type=ParseException, msg=None):
|
|
with self.assertRaises(exc_type, msg=msg):
|
|
yield
|
|
|
|
@staticmethod
|
|
def with_line_numbers(
|
|
s: str,
|
|
start_line: typing.Optional[int] = None,
|
|
end_line: typing.Optional[int] = None,
|
|
expand_tabs: bool = True,
|
|
eol_mark: str = "|",
|
|
mark_spaces: typing.Optional[str] = None,
|
|
mark_control: typing.Optional[str] = None,
|
|
) -> str:
|
|
"""
|
|
Helpful method for debugging a parser - prints a string with line and column numbers.
|
|
(Line and column numbers are 1-based.)
|
|
|
|
:param s: tuple(bool, str - string to be printed with line and column numbers
|
|
:param start_line: int - (optional) starting line number in s to print (default=1)
|
|
:param end_line: int - (optional) ending line number in s to print (default=len(s))
|
|
:param expand_tabs: bool - (optional) expand tabs to spaces, to match the pyparsing default
|
|
:param eol_mark: str - (optional) string to mark the end of lines, helps visualize trailing spaces (default="|")
|
|
:param mark_spaces: str - (optional) special character to display in place of spaces
|
|
:param mark_control: str - (optional) convert non-printing control characters to a placeholding
|
|
character; valid values:
|
|
- "unicode" - replaces control chars with Unicode symbols, such as "␍" and "␊"
|
|
- any single character string - replace control characters with given string
|
|
- None (default) - string is displayed as-is
|
|
|
|
:return: str - input string with leading line numbers and column number headers
|
|
"""
|
|
if expand_tabs:
|
|
s = s.expandtabs()
|
|
if mark_control is not None:
|
|
if mark_control == "unicode":
|
|
tbl = str.maketrans(
|
|
{c: u for c, u in zip(range(0, 33), range(0x2400, 0x2433))}
|
|
| {127: 0x2421}
|
|
)
|
|
eol_mark = ""
|
|
else:
|
|
tbl = str.maketrans(
|
|
{c: mark_control for c in list(range(0, 32)) + [127]}
|
|
)
|
|
s = s.translate(tbl)
|
|
if mark_spaces is not None and mark_spaces != " ":
|
|
if mark_spaces == "unicode":
|
|
tbl = str.maketrans({9: 0x2409, 32: 0x2423})
|
|
s = s.translate(tbl)
|
|
else:
|
|
s = s.replace(" ", mark_spaces)
|
|
if start_line is None:
|
|
start_line = 1
|
|
if end_line is None:
|
|
end_line = len(s)
|
|
end_line = min(end_line, len(s))
|
|
start_line = min(max(1, start_line), end_line)
|
|
|
|
if mark_control != "unicode":
|
|
s_lines = s.splitlines()[start_line - 1 : end_line]
|
|
else:
|
|
s_lines = [line + "␊" for line in s.split("␊")[start_line - 1 : end_line]]
|
|
if not s_lines:
|
|
return ""
|
|
|
|
lineno_width = len(str(end_line))
|
|
max_line_len = max(len(line) for line in s_lines)
|
|
lead = " " * (lineno_width + 1)
|
|
if max_line_len >= 99:
|
|
header0 = (
|
|
lead
|
|
+ "".join(
|
|
"{}{}".format(" " * 99, (i + 1) % 100)
|
|
for i in range(max(max_line_len // 100, 1))
|
|
)
|
|
+ "\n"
|
|
)
|
|
else:
|
|
header0 = ""
|
|
header1 = (
|
|
header0
|
|
+ lead
|
|
+ "".join(
|
|
" {}".format((i + 1) % 10)
|
|
for i in range(-(-max_line_len // 10))
|
|
)
|
|
+ "\n"
|
|
)
|
|
header2 = lead + "1234567890" * (-(-max_line_len // 10)) + "\n"
|
|
return (
|
|
header1
|
|
+ header2
|
|
+ "\n".join(
|
|
"{:{}d}:{}{}".format(i, lineno_width, line, eol_mark)
|
|
for i, line in enumerate(s_lines, start=start_line)
|
|
)
|
|
+ "\n"
|
|
)
|