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from __future__ import annotations
import pickle
import pytest
from pint import (
DefinitionSyntaxError,
DimensionalityError,
LogarithmicUnitCalculusError,
OffsetUnitCalculusError,
PintError,
Quantity,
RedefinitionError,
UndefinedUnitError,
UnitRegistry,
)
from pint.errors import LOG_ERROR_DOCS_HTML, OFFSET_ERROR_DOCS_HTML
class TestErrors:
def test_definition_syntax_error(self):
ex = DefinitionSyntaxError("foo")
assert str(ex) == "foo"
def test_redefinition_error(self):
ex = RedefinitionError("foo", "bar")
assert str(ex) == "Cannot redefine 'foo' (bar)"
with pytest.raises(PintError):
raise ex
def test_undefined_unit_error(self):
x = ("meter",)
msg = "'meter' is not defined in the unit registry"
ex = UndefinedUnitError(x)
assert str(ex) == msg
ex = UndefinedUnitError(list(x))
assert str(ex) == msg
ex = UndefinedUnitError(set(x))
assert str(ex) == msg
with pytest.raises(PintError):
raise ex
def test_undefined_unit_error_multi(self):
x = ("meter", "kg")
msg = "('meter', 'kg') are not defined in the unit registry"
ex = UndefinedUnitError(x)
assert str(ex) == msg
ex = UndefinedUnitError(list(x))
assert str(ex) == msg
with pytest.raises(PintError):
raise ex
def test_dimensionality_error(self):
ex = DimensionalityError("a", "b")
assert str(ex) == "Cannot convert from 'a' to 'b'"
ex = DimensionalityError("a", "b", "c")
assert str(ex) == "Cannot convert from 'a' (c) to 'b' ()"
ex = DimensionalityError("a", "b", "c", "d", extra_msg=": msg")
assert str(ex) == "Cannot convert from 'a' (c) to 'b' (d): msg"
with pytest.raises(PintError):
raise ex
def test_offset_unit_calculus_error(self):
ex = OffsetUnitCalculusError(Quantity("1 kg")._units)
assert (
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)
assert (
str(ex)
== "Ambiguous operation with offset unit (kilogram, second). See "
+ OFFSET_ERROR_DOCS_HTML
+ " for guidance."
)
with pytest.raises(PintError):
raise ex
def test_logarithmic_unit_calculus_error(self):
Quantity = UnitRegistry(autoconvert_offset_to_baseunit=True).Quantity
ex = LogarithmicUnitCalculusError(Quantity("1 dB")._units)
assert (
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
)
assert (
str(ex)
== "Ambiguous operation with logarithmic unit (decibel, octave). See "
+ LOG_ERROR_DOCS_HTML
+ " for guidance."
)
with pytest.raises(PintError):
raise ex
def test_pickle_definition_syntax_error(self, subtests):
# 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"),
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 subtests.test(protocol=protocol, etype=type(ex)):
pik = pickle.dumps(ureg.Quantity("1 foo"), protocol)
with pytest.raises(UndefinedUnitError):
pickle.loads(pik)
# assert False, ex.__reduce__()
ex2 = pickle.loads(pickle.dumps(ex, protocol))
print(ex)
print(ex2)
assert type(ex) is type(ex2)
assert ex == ex
# assert ex.__dict__ == ex2.__dict__
assert str(ex) == str(ex2)
with pytest.raises(PintError):
raise ex
def test_dimensionality_error_message(self):
ureg = UnitRegistry(system="SI")
with pytest.raises(ValueError) as error:
ureg.get_dimensionality("[bilbo]")
assert (
str(error.value)
== "[bilbo] is not defined as dimension in the pint UnitRegistry"
)
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