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import pickle
from pint import (
DefinitionSyntaxError,
DimensionalityError,
LogarithmicUnitCalculusError,
OffsetUnitCalculusError,
Quantity,
RedefinitionError,
UndefinedUnitError,
UnitRegistry,
)
from pint.errors import LOG_ERROR_DOCS_HTML, OFFSET_ERROR_DOCS_HTML
from pint.testsuite import BaseTestCase
class TestErrors(BaseTestCase):
def test_definition_syntax_error(self):
ex = DefinitionSyntaxError("foo")
self.assertEqual(str(ex), "foo")
# filename and lineno can be attached after init
ex.filename = "a.txt"
ex.lineno = 123
self.assertEqual(str(ex), "While opening a.txt, in line 123: foo")
ex = DefinitionSyntaxError("foo", lineno=123)
self.assertEqual(str(ex), "In line 123: foo")
ex = DefinitionSyntaxError("foo", filename="a.txt")
self.assertEqual(str(ex), "While opening a.txt: foo")
ex = DefinitionSyntaxError("foo", filename="a.txt", lineno=123)
self.assertEqual(str(ex), "While opening a.txt, in line 123: foo")
def test_redefinition_error(self):
ex = RedefinitionError("foo", "bar")
self.assertEqual(str(ex), "Cannot redefine 'foo' (bar)")
# filename and lineno can be attached after init
ex.filename = "a.txt"
ex.lineno = 123
self.assertEqual(
str(ex), "While opening a.txt, in line 123: Cannot redefine 'foo' (bar)"
)
ex = RedefinitionError("foo", "bar", lineno=123)
self.assertEqual(str(ex), "In line 123: Cannot redefine 'foo' (bar)")
ex = RedefinitionError("foo", "bar", filename="a.txt")
self.assertEqual(str(ex), "While opening a.txt: Cannot redefine 'foo' (bar)")
ex = RedefinitionError("foo", "bar", filename="a.txt", lineno=123)
self.assertEqual(
str(ex), "While opening a.txt, in line 123: Cannot redefine 'foo' (bar)"
)
def test_undefined_unit_error(self):
x = ("meter",)
msg = "'meter' is not defined in the unit registry"
self.assertEqual(str(UndefinedUnitError(x)), msg)
self.assertEqual(str(UndefinedUnitError(list(x))), msg)
self.assertEqual(str(UndefinedUnitError(set(x))), msg)
def test_undefined_unit_error_multi(self):
x = ("meter", "kg")
msg = "('meter', 'kg') are not defined in the unit registry"
self.assertEqual(str(UndefinedUnitError(x)), msg)
self.assertEqual(str(UndefinedUnitError(list(x))), msg)
def test_dimensionality_error(self):
ex = DimensionalityError("a", "b")
self.assertEqual(str(ex), "Cannot convert from 'a' to 'b'")
ex = DimensionalityError("a", "b", "c")
self.assertEqual(str(ex), "Cannot convert from 'a' (c) to 'b' ()")
ex = DimensionalityError("a", "b", "c", "d", extra_msg=": msg")
self.assertEqual(str(ex), "Cannot convert from 'a' (c) to 'b' (d): msg")
def test_offset_unit_calculus_error(self):
ex = OffsetUnitCalculusError(Quantity("1 kg")._units)
self.assertEqual(
str(ex),
"Ambiguous operation with offset unit (kilogram). See "
+ OFFSET_ERROR_DOCS_HTML
+ " for guidance.",
)
ex = OffsetUnitCalculusError(Quantity("1 kg")._units, Quantity("1 s")._units)
self.assertEqual(
str(ex),
"Ambiguous operation with offset unit (kilogram, second). See "
+ OFFSET_ERROR_DOCS_HTML
+ " for guidance.",
)
def test_logarithmic_unit_calculus_error(self):
Quantity = UnitRegistry(autoconvert_offset_to_baseunit=True).Quantity
ex = LogarithmicUnitCalculusError(Quantity("1 dB")._units)
self.assertEqual(
str(ex),
"Ambiguous operation with logarithmic unit (decibel). See "
+ LOG_ERROR_DOCS_HTML
+ " for guidance.",
)
ex = LogarithmicUnitCalculusError(
Quantity("1 dB")._units, Quantity("1 octave")._units
)
self.assertEqual(
str(ex),
"Ambiguous operation with logarithmic unit (decibel, octave). See "
+ LOG_ERROR_DOCS_HTML
+ " for guidance.",
)
def test_pickle_definition_syntax_error(self):
# OffsetUnitCalculusError raised from a custom ureg must be pickleable even if
# the ureg is not registered as the application ureg
ureg = UnitRegistry(filename=None)
ureg.define("foo = [bar]")
ureg.define("bar = 2 foo")
q1 = ureg.Quantity("1 foo")
q2 = ureg.Quantity("1 bar")
for protocol in range(pickle.HIGHEST_PROTOCOL + 1):
for ex in [
DefinitionSyntaxError("foo", filename="a.txt", lineno=123),
RedefinitionError("foo", "bar"),
UndefinedUnitError("meter"),
DimensionalityError("a", "b", "c", "d", extra_msg=": msg"),
OffsetUnitCalculusError(
Quantity("1 kg")._units, Quantity("1 s")._units
),
OffsetUnitCalculusError(q1._units, q2._units),
]:
with self.subTest(protocol=protocol, etype=type(ex)):
pik = pickle.dumps(ureg.Quantity("1 foo"), protocol)
with self.assertRaises(UndefinedUnitError):
pickle.loads(pik)
# assert False, ex.__reduce__()
ex2 = pickle.loads(pickle.dumps(ex, protocol))
assert type(ex) is type(ex2)
self.assertEqual(ex.args, ex2.args)
self.assertEqual(ex.__dict__, ex2.__dict__)
self.assertEqual(str(ex), str(ex2))
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