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import pytest
from django.core import serializers
from django.core.exceptions import ValidationError
from django.utils import module_loading
from measurement import measures
from measurement.measures import Distance
from django_measurement.forms import MeasurementField
from tests.custom_measure_base import DegreePerTime, Temperature, Time
from tests.forms import (
BiDimensionalLabelTestForm,
LabelTestForm,
MeasurementTestForm,
SITestForm,
)
from tests.models import MeasurementTestModel
pytestmark = [
pytest.mark.django_db,
]
class TestMeasurementField:
def test_storage_of_standard_measurement(self):
measurement = measures.Weight(g=20)
instance = MeasurementTestModel()
instance.measurement_weight = measurement
instance.save()
retrieved = MeasurementTestModel.objects.get(pk=instance.pk)
assert retrieved.measurement_weight == measurement
def test_storage_of_temperature(self):
measurement = measures.Temperature(c=20)
instance = MeasurementTestModel()
instance.measurement_temperature = measurement
instance.save()
retrieved = MeasurementTestModel.objects.get(pk=instance.pk)
assert retrieved.measurement_temperature == measurement
def test_storage_of_string_value(self):
instance = MeasurementTestModel()
instance.measurement_weight = "21.4"
instance.save()
retrieved = MeasurementTestModel.objects.get(pk=instance.pk)
assert retrieved.measurement_weight == measures.Weight(g=21.4)
def test_storage_of_float_value(self):
instance = MeasurementTestModel()
instance.measurement_weight = 21.4
instance.save()
retrieved = MeasurementTestModel.objects.get(pk=instance.pk)
assert retrieved.measurement_weight == measures.Weight(g=21.4)
def test_storage_of_bidimensional_measurement(self):
measurement = measures.Speed(mph=20)
instance = MeasurementTestModel()
instance.measurement_speed = measurement
instance.save()
retrieved = MeasurementTestModel.objects.get(pk=instance.pk)
assert retrieved.measurement_speed == measurement
def test_storage_and_retrieval_of_bidimensional_measurement(self):
original_value = measures.Speed(mph=65)
MeasurementTestModel.objects.create(
measurement_speed=original_value,
)
retrieved = MeasurementTestModel.objects.get()
new_value = retrieved.measurement_speed
assert new_value == original_value
assert type(new_value) == type(original_value)
assert new_value.unit == original_value.STANDARD_UNIT
def test_storage_and_retrieval_of_bidimensional_measurement_choice(self):
original_value = measures.Speed(mph=65)
MeasurementTestModel.objects.create(
measurement_speed_mph=original_value,
)
retrieved = MeasurementTestModel.objects.get()
new_value = retrieved.measurement_speed_mph
assert new_value == original_value
assert type(new_value) == type(original_value)
assert new_value.unit == original_value.unit
def test_storage_and_retrieval_of_measurement(self):
original_value = measures.Weight(lb=124)
MeasurementTestModel.objects.create(
measurement_weight=original_value,
)
retrieved = MeasurementTestModel.objects.get()
new_value = retrieved.measurement_weight
assert new_value == original_value
assert type(new_value) == type(original_value)
assert new_value.unit == original_value.STANDARD_UNIT
def test_storage_and_retrieval_of_measurement_choice(self):
original_value = measures.Distance(km=100)
MeasurementTestModel.objects.create(
measurement_distance_km=original_value,
)
retrieved = MeasurementTestModel.objects.get()
new_value = retrieved.measurement_distance_km
assert new_value == original_value
assert type(new_value) == type(original_value)
assert new_value.unit == original_value.unit
@pytest.mark.parametrize(
"fieldname, measure_cls",
[
("measurement_weight", measures.Weight),
("measurement_distance", measures.Distance),
("measurement_distance_km", measures.Distance),
("measurement_speed", measures.Speed),
("measurement_temperature", measures.Temperature),
("measurement_speed_mph", measures.Speed),
("measurement_custom_degree_per_time", DegreePerTime),
("measurement_custom_temperature", Temperature),
("measurement_custom_time", Time),
],
)
class TestDeconstruct:
def test_deconstruct(self, fieldname, measure_cls):
field = MeasurementTestModel._meta.get_field(fieldname)
name, path, args, kwargs = field.deconstruct()
assert name == fieldname
assert path == "django_measurement.models.MeasurementField"
assert args == []
assert kwargs["blank"] == field.blank
assert kwargs["null"] == field.null
assert kwargs["measurement"] == field.measurement
new_cls = module_loading.import_string(path)
new_field = new_cls(name=name, *args, **kwargs)
assert type(field) == type(new_field)
assert field.deconstruct() == (name, path, args, kwargs)
@pytest.mark.parametrize(
"fieldname, measure, expected_serialized_value",
[
("measurement_weight", measures.Weight(kg=4.0), "4.0:kg"),
("measurement_speed", measures.Speed(mi__hr=2.0), "2.0:mi__hr"),
],
)
class TestSerialization:
def test_deconstruct(self, fieldname, measure, expected_serialized_value):
instance = MeasurementTestModel(pk=0)
setattr(instance, fieldname, measure)
serialized_object = serializers.serialize("python", [instance])[0]
serialized_value = serialized_object["fields"][fieldname]
assert isinstance(serialized_value, str)
assert serialized_value == expected_serialized_value
deserialized_obj = next(serializers.deserialize("python", [serialized_object]))
deserialized_value = getattr(deserialized_obj.object, fieldname)
assert deserialized_value == measure
class TestMeasurementFormField:
def test_max_value(self):
valid_form = MeasurementTestForm(
{"measurement_distance_0": 2.0, "measurement_distance_1": "mi"}
)
invalid_form = MeasurementTestForm(
{"measurement_distance_0": 4.0, "measurement_distance_1": "mi"}
)
assert valid_form.is_valid()
assert not invalid_form.is_valid()
field = MeasurementField(measures.Distance, max_value=measures.Distance(mi=1))
field.clean([0.5, "mi"])
with pytest.raises(ValidationError) as e:
field.clean([2.0, "mi"])
assert "Ensure this value is less than or equal to 1.0 mi." in str(e)
with pytest.raises(ValueError) as e:
MeasurementField(measures.Distance, max_value=1.0)
assert bytes(e) == '"max_value" must be a measure, got float'
def test_form_storage(self):
form = MeasurementTestForm(
{"measurement_distance_0": 2.0, "measurement_distance_1": "mi"}
)
assert form.is_valid()
obj = form.save()
assert obj.measurement_distance == measures.Distance(mi=2)
def test_form_bidir(self):
form = MeasurementTestForm(
{"measurement_speed_0": 2.0, "measurement_speed_1": "mi__hr"}
)
assert form.is_valid()
obj = form.save()
assert obj.measurement_speed == measures.Speed(mi__hr=2)
def test_min_value(self):
field = MeasurementField(measures.Distance, min_value=measures.Distance(mi=1.0))
field.clean([2.0, "mi"])
with pytest.raises(ValidationError) as e:
field.clean([0.5, "mi"])
assert "Ensure this value is greater than or equal to 1.0 mi." in str(e)
with pytest.raises(ValueError) as e:
MeasurementField(measures.Distance, min_value=1.0)
assert str(e) == '"min_value" must be a measure, got float'
def test_float_casting(self, caplog):
m = MeasurementTestModel(
measurement_distance=float(2000),
measurement_distance_km=2,
)
m.full_clean()
assert m.measurement_distance.value == 2000
assert m.measurement_distance.unit == Distance.STANDARD_UNIT
assert m.measurement_distance_km.value == 2
assert m.measurement_distance_km.unit == "km"
assert m.measurement_distance_km == Distance(km=2)
m.measurement_distance_km = Distance(km=1)
m.full_clean()
assert m.measurement_distance_km.value == 1
assert m.measurement_distance_km.unit == "km"
assert m.measurement_distance_km == Distance(km=1)
record = caplog.records[0]
assert record.levelname == "WARNING"
assert record.message == (
"You assigned a float instead of Distance to"
" tests.models.MeasurementTestModel.measurement_distance,"
' unit was guessed to be "m".'
)
def test_unicode_labels(self):
form = LabelTestForm()
assert ("c", u"°C") in form.fields["simple"].fields[1].choices
assert ("f", u"°F") in form.fields["simple"].fields[1].choices
assert ("k", u"°K") in form.fields["simple"].fields[1].choices
si_form = SITestForm()
assert ("ms", "ms") in si_form.fields["simple"].fields[1].choices
assert ("Ps", "Ps") in si_form.fields["simple"].fields[1].choices
bi_dim_form = BiDimensionalLabelTestForm()
assert ("c__ms", u"°C/ms") in bi_dim_form.fields["simple"].fields[1].choices
assert ("c__Ps", u"°C/Ps") in bi_dim_form.fields["simple"].fields[1].choices
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