def _printTraceback(self, test, err):
"""Print a nicely formatted traceback.
:arg err: exc_info()-style traceback triple
:arg test: the test that precipitated this call
"""
# Don't bind third item to a local var; that can create
# circular refs which are expensive to collect. See the
# sys.exc_info() docs.
exception_type, exception_value = err[:2]
extracted_tb = extract_relevant_tb(
err[2], exception_type, exception_type is test.failureException)
test_frame_index = index_of_test_frame(extracted_tb, exception_type,
exception_value, test)
if test_frame_index:
# We have a good guess at which frame is the test, so
# trim everything until that. We don't care to see test
# framework frames.
extracted_tb = extracted_tb[test_frame_index:]
with self.bar.dodging():
self.stream.write(''.join(
format_traceback(extracted_tb, exception_type, exception_value,
self._cwd, self._term,
self._options.function_color,
self._options.dim_color,
self._options.editor)))
def test_unicode():
"""Don't have encoding explosions when a line of code contains non-ASCII."""
unicode_tb = (
[("/usr/lib/whatever.py", 69, "getMethod", """return u'あ'""")],
AttributeError,
AttributeError("'NoneType' object has no pants.'"),
)
"".join(format_traceback(*unicode_tb))
def test_empty_tracebacks():
"""Make sure we don't crash on empty tracebacks.
Sometimes, stuff crashes before we even get to the test. pdbpp has been
doing this a lot to me lately. When that happens, we receive an empty
traceback.
"""
list(format_traceback([], AttributeError, AttributeError("'NoneType' object has no attribute 'pgpImportPubkey'")))
def test_none_members():
"""Don't crash if the attrs of an extracted traceback are None.
This can happen when using mocking.
"""
list(
format_traceback([(None, None, None, None)], AttributeError,
AttributeError('I have many nasty attributes.')))
def test_none_members():
"""Don't crash if the attrs of an extracted traceback are None.
This can happen when using mocking.
"""
list(format_traceback(
[(None, None, None, None)],
AttributeError,
AttributeError('I have many nasty attributes.')))
def test_empty_tracebacks():
"""Make sure we don't crash on empty tracebacks.
Sometimes, stuff crashes before we even get to the test. pdbpp has been
doing this a lot to me lately. When that happens, we receive an empty
traceback.
"""
list(format_traceback(
[],
AttributeError,
AttributeError("'NoneType' object has no attribute 'pgpImportPubkey'")))
def _printError(self, kind, err, test, isFailure=True):
"""Output a human-readable error report to the stream.
kind -- the (string) type of incident the precipitated this call
err -- exc_info()-style traceback triple
test -- the test that precipitated this call
"""
if isFailure or self._options.show_advisories:
writeln = self.stream.writeln
write = self.stream.write
with self.bar.dodging():
writeln('\n' +
(self._term.bold if isFailure else '') +
'%s: %s' % (kind, nose_selector(test)) +
(self._term.normal if isFailure else '')) # end bold
if isFailure: # Then show traceback
# Don't bind third item to a local var; that can create
# circular refs which are expensive to collect. See the
# sys.exc_info() docs.
exception_type, exception_value = err[:2]
extracted_tb = extract_relevant_tb(
err[2],
exception_type,
exception_type is test.failureException)
test_frame_index = index_of_test_frame(
extracted_tb,
exception_type,
exception_value,
test)
if test_frame_index:
# We have a good guess at which frame is the test, so
# trim everything until that. We don't care to see test
# framework frames.
extracted_tb = extracted_tb[test_frame_index:]
write(''.join(
format_traceback(
extracted_tb,
exception_type,
exception_value,
self._cwd,
self._term,
self._options.function_color,
self._options.dim_color,
self._options.editor)))
def _printTraceback(self, test, err):
"""Print a nicely formatted traceback.
:arg err: exc_info()-style traceback triple
:arg test: the test that precipitated this call
"""
# Don't bind third item to a local var; that can create
# circular refs which are expensive to collect. See the
# sys.exc_info() docs.
exception_type, exception_value = err[:2]
# TODO: In Python 3, the traceback is attached to the exception
# instance through the __traceback__ attribute. If the instance
# is saved in a local variable that persists outside the except
# block, the traceback will create a reference cycle with the
# current frame and its dictionary of local variables. This will
# delay reclaiming dead resources until the next cyclic garbage
# collection pass.
extracted_tb = extract_relevant_tb(
err[2],
exception_type,
exception_type is test.failureException)
test_frame_index = index_of_test_frame(
extracted_tb,
exception_type,
exception_value,
test)
if test_frame_index:
# We have a good guess at which frame is the test, so
# trim everything until that. We don't care to see test
# framework frames.
extracted_tb = extracted_tb[test_frame_index:]
with self.bar.dodging():
self.stream.write(''.join(
format_traceback(
extracted_tb,
exception_type,
exception_value,
self._cwd,
self._term,
self._options.function_color,
self._options.dim_color,
self._options.editor,
self._options.editor_shortcut_template)))
def test_proxied_syntax_error():
"""The logcapture plugin formats errors by extracting and converting
the value to a string. Nose recreates a proxy exception lacking
filename and lineno attributes, crashing the shortcut formatting
"""
string_error = ''.join([
"invalid syntax (package.py, line 111)\n",
"-------------------- >> begin captured logging << --------------------\n",
"DEBUG: a logged message\n",
"--------------------- >> end captured logging << ---------------------"
])
# This is essentially what nose does with a string exception
proxied_syntax_error = type('SyntaxError', (Exception,), {})(string_error)
proxied_syntax_tb = ([
('/usr/lib/python2.7/site-packages/nose/loader.py', 403, 'loadTestsFromName', 'module = resolve_name(addr.module)'),
('/usr/lib/python2.7/site-packages/nose/util.py', 311, 'resolve_name', "module = __import__('.'.join(parts_copy))"),
('/usr/local/venvs/project/tests.py', 8, '<module>', 'from project.package import something')
], SyntaxError, proxied_syntax_error
)
''.join(format_traceback(*proxied_syntax_tb))
def test_proxied_syntax_error():
"""The logcapture plugin formats errors by extracting and converting
the value to a string. Nose recreates a proxy exception lacking
filename and lineno attributes, crashing the shortcut formatting
"""
string_error = ''.join([
"invalid syntax (package.py, line 111)\n",
"-------------------- >> begin captured logging << --------------------\n",
"DEBUG: a logged message\n",
"--------------------- >> end captured logging << ---------------------"
])
# This is essentially what nose does with a string exception
proxied_syntax_error = type('SyntaxError', (Exception, ), {})(string_error)
proxied_syntax_tb = ([
('/usr/lib/python2.7/site-packages/nose/loader.py', 403,
'loadTestsFromName', 'module = resolve_name(addr.module)'),
('/usr/lib/python2.7/site-packages/nose/util.py', 311, 'resolve_name',
"module = __import__('.'.join(parts_copy))"),
('/usr/local/venvs/project/tests.py', 8, '<module>',
'from project.package import something')
], SyntaxError, proxied_syntax_error)
''.join(format_traceback(*proxied_syntax_tb))
def _printTraceback(self, test, err):
"""Print a nicely formatted traceback.
:arg err: exc_info()-style traceback triple
:arg test: the test that precipitated this call
"""
# Don't bind third item to a local var; that can create
# circular refs which are expensive to collect. See the
# sys.exc_info() docs.
exception_type, exception_value = err[:2]
extracted_tb = extract_relevant_tb(
err[2],
exception_type,
exception_type is test.failureException)
test_frame_index = index_of_test_frame(
extracted_tb,
exception_type,
exception_value,
test)
if test_frame_index:
# We have a good guess at which frame is the test, so
# trim everything until that. We don't care to see test
# framework frames.
extracted_tb = extracted_tb[test_frame_index:]
with self.bar.dodging():
self.stream.write(''.join(
format_traceback(
extracted_tb,
exception_type,
exception_value,
self._cwd,
self._term,
self._options.function_color,
self._options.dim_color,
self._options.editor)))
def test_non_syntax_error():
"""Exercise typical error formatting to show it doesn't crash."""
"".join(format_traceback(*attr_error_tb))
def test_syntax_error():
"""Exercise special handling of syntax errors to show it doesn't crash."""
"".join(format_traceback(*syntax_error_tb))
def test_syntax_error():
"""Exercise special handling of syntax errors."""
''.join(format_traceback(*syntax_error_tb))
def test_non_syntax_error():
"""Exercise typical error formatting."""
''.join(format_traceback(*attr_error_tb))
def test_unicode():
"""Don't have encoding explosions when a line of code contains non-ASCII."""
unicode_tb = ([
("/usr/lib/whatever.py", 69, 'getMethod', """return u'あ'""")
], AttributeError, AttributeError("'NoneType' object has no pants.'"))
''.join(format_traceback(*unicode_tb))
def test_non_syntax_error():
"""Exercise typical error formatting to show it doesn't crash."""
''.join(format_traceback(*attr_error_tb))
def test_syntax_error():
"""Exercise special handling of syntax errors to show it doesn't crash."""
''.join(format_traceback(*syntax_error_tb))
