def test_format_exceptions(cgitb, as_html, monkeypatch):
if cgitb:
monkeypatch.setitem(sys.modules, 'IPython.core.ultratb', None)
monkeypatch.setattr(
exceptions,
'standard_metadata',
lambda x: {
'package': 'test-package',
'version': '0.1.0'
},
)
# we make sure to actually raise the exceptions,
# otherwise they will miss the __traceback__ attributes.
try:
try:
raise ValueError('cause')
except ValueError as e:
raise PluginError(
'some error',
plugin_name='test_plugin',
plugin="mock",
cause=e,
)
except PluginError:
pass
formatted = exceptions.format_exceptions('test_plugin', as_html=as_html)
assert "some error" in formatted
assert "version: 0.1.0" in formatted
assert "plugin package: test-package" in formatted
assert exceptions.format_exceptions('nonexistent', as_html=as_html) == ''
def test_format_exceptions(plugin_manager):
"""Test that format_exceptions returns a string with traceback info."""
# check both as_html=True and False
assert 'Traceback' in format_exceptions('invalid', as_html=False)
assert 'Traceback' in format_exceptions('invalid', as_html=True)
# formatting exceptions for a plugin that has not errored returns None.
assert not format_exceptions('working')
def test_iter_reader_plugins(plugin_manager):
"""Test safe iteration through reader plugins even with errors.
`napari_bad_plugin2` is a plugin that loads fine but throws an error during
file-reading. this tests that we can gracefully handle that.
"""
# the plugin loads fine, so there should be no exceptions yet.
assert 'napari_bad_plugin2' not in PLUGIN_ERRORS
# make sure 'napari_bad_plugin2' gets called first
plugin_manager.hooks.napari_get_reader.bring_to_front(
['napari_bad_plugin2'])
# but when we try to read an image path, it will raise an IOError.
# we want to catch and store that IOError, and then move on to give other
# plugins chance to return layer_data
layer_data = read_data_with_plugins('image.ext', plugin_manager)
# the good plugins (like "napari_test_plugin") should return layer_data
assert layer_data
# but the exception from `bad_plugin2` should now be stored.
assert 'napari_bad_plugin2' in PLUGIN_ERRORS
# we can print out a string that should have the explanation of the error.
exception_string = format_exceptions('napari_bad_plugin2')
assert 'IOError' in exception_string
assert "napari_get_reader" in exception_string
def test_format_exceptions(cgitb, as_html, monkeypatch):
if cgitb:
monkeypatch.setitem(sys.modules, 'IPython.core.ultratb', None)
monkeypatch.setattr(
exceptions,
'standard_metadata',
lambda x: {'package': 'test-package', 'version': '0.1.0'},
)
_ = PluginError(
'some error',
plugin_name='test_plugin',
plugin="mock",
cause=ValueError("cause"),
)
formatted = exceptions.format_exceptions('test_plugin', as_html=as_html)
assert "some error" in formatted
assert "version: 0.1.0" in formatted
assert "plugin package: test-package" in formatted
assert exceptions.format_exceptions('nonexistent', as_html=as_html) == ''