django1/tests/forms_tests/field_tests/test_decimalfield.py

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import decimal
from django.forms import DecimalField, NumberInput, ValidationError, Widget
from django.test import SimpleTestCase, override_settings
from django.utils import formats, translation
from . import FormFieldAssertionsMixin
class DecimalFieldTest(FormFieldAssertionsMixin, SimpleTestCase):
def test_decimalfield_1(self):
f = DecimalField(max_digits=4, decimal_places=2)
self.assertWidgetRendersTo(f, '<input id="id_f" step="0.01" type="number" name="f" required />')
with self.assertRaisesMessage(ValidationError, "'This field is required.'"):
f.clean('')
with self.assertRaisesMessage(ValidationError, "'This field is required.'"):
f.clean(None)
self.assertEqual(f.clean('1'), decimal.Decimal("1"))
self.assertIsInstance(f.clean('1'), decimal.Decimal)
self.assertEqual(f.clean('23'), decimal.Decimal("23"))
self.assertEqual(f.clean('3.14'), decimal.Decimal("3.14"))
self.assertEqual(f.clean(3.14), decimal.Decimal("3.14"))
self.assertEqual(f.clean(decimal.Decimal('3.14')), decimal.Decimal("3.14"))
with self.assertRaisesMessage(ValidationError, "'Enter a number.'"):
f.clean('NaN')
with self.assertRaisesMessage(ValidationError, "'Enter a number.'"):
f.clean('Inf')
with self.assertRaisesMessage(ValidationError, "'Enter a number.'"):
f.clean('-Inf')
with self.assertRaisesMessage(ValidationError, "'Enter a number.'"):
f.clean('a')
with self.assertRaisesMessage(ValidationError, "'Enter a number.'"):
f.clean('łąść')
self.assertEqual(f.clean('1.0 '), decimal.Decimal("1.0"))
self.assertEqual(f.clean(' 1.0'), decimal.Decimal("1.0"))
self.assertEqual(f.clean(' 1.0 '), decimal.Decimal("1.0"))
with self.assertRaisesMessage(ValidationError, "'Enter a number.'"):
f.clean('1.0a')
with self.assertRaisesMessage(ValidationError, "'Ensure that there are no more than 4 digits in total.'"):
f.clean('123.45')
with self.assertRaisesMessage(ValidationError, "'Ensure that there are no more than 2 decimal places.'"):
f.clean('1.234')
msg = "'Ensure that there are no more than 2 digits before the decimal point.'"
with self.assertRaisesMessage(ValidationError, msg):
f.clean('123.4')
self.assertEqual(f.clean('-12.34'), decimal.Decimal("-12.34"))
with self.assertRaisesMessage(ValidationError, "'Ensure that there are no more than 4 digits in total.'"):
f.clean('-123.45')
self.assertEqual(f.clean('-.12'), decimal.Decimal("-0.12"))
self.assertEqual(f.clean('-00.12'), decimal.Decimal("-0.12"))
self.assertEqual(f.clean('-000.12'), decimal.Decimal("-0.12"))
with self.assertRaisesMessage(ValidationError, "'Ensure that there are no more than 2 decimal places.'"):
f.clean('-000.123')
with self.assertRaisesMessage(ValidationError, "'Ensure that there are no more than 4 digits in total.'"):
f.clean('-000.12345')
with self.assertRaisesMessage(ValidationError, "'Enter a number.'"):
f.clean('--0.12')
self.assertEqual(f.max_digits, 4)
self.assertEqual(f.decimal_places, 2)
self.assertIsNone(f.max_value)
self.assertIsNone(f.min_value)
def test_decimalfield_2(self):
f = DecimalField(max_digits=4, decimal_places=2, required=False)
self.assertIsNone(f.clean(''))
self.assertIsNone(f.clean(None))
self.assertEqual(f.clean('1'), decimal.Decimal("1"))
self.assertEqual(f.max_digits, 4)
self.assertEqual(f.decimal_places, 2)
self.assertIsNone(f.max_value)
self.assertIsNone(f.min_value)
def test_decimalfield_3(self):
f = DecimalField(
max_digits=4, decimal_places=2,
max_value=decimal.Decimal('1.5'),
min_value=decimal.Decimal('0.5')
)
self.assertWidgetRendersTo(
f,
'<input step="0.01" name="f" min="0.5" max="1.5" type="number" id="id_f" required />',
)
with self.assertRaisesMessage(ValidationError, "'Ensure this value is less than or equal to 1.5.'"):
f.clean('1.6')
with self.assertRaisesMessage(ValidationError, "'Ensure this value is greater than or equal to 0.5.'"):
f.clean('0.4')
self.assertEqual(f.clean('1.5'), decimal.Decimal("1.5"))
self.assertEqual(f.clean('0.5'), decimal.Decimal("0.5"))
self.assertEqual(f.clean('.5'), decimal.Decimal("0.5"))
self.assertEqual(f.clean('00.50'), decimal.Decimal("0.50"))
self.assertEqual(f.max_digits, 4)
self.assertEqual(f.decimal_places, 2)
self.assertEqual(f.max_value, decimal.Decimal('1.5'))
self.assertEqual(f.min_value, decimal.Decimal('0.5'))
def test_decimalfield_4(self):
f = DecimalField(decimal_places=2)
with self.assertRaisesMessage(ValidationError, "'Ensure that there are no more than 2 decimal places.'"):
f.clean('0.00000001')
def test_decimalfield_5(self):
f = DecimalField(max_digits=3)
# Leading whole zeros "collapse" to one digit.
self.assertEqual(f.clean('0000000.10'), decimal.Decimal("0.1"))
# But a leading 0 before the . doesn't count towards max_digits
self.assertEqual(f.clean('0000000.100'), decimal.Decimal("0.100"))
# Only leading whole zeros "collapse" to one digit.
self.assertEqual(f.clean('000000.02'), decimal.Decimal('0.02'))
with self.assertRaisesMessage(ValidationError, "'Ensure that there are no more than 3 digits in total.'"):
f.clean('000000.0002')
self.assertEqual(f.clean('.002'), decimal.Decimal("0.002"))
def test_decimalfield_6(self):
f = DecimalField(max_digits=2, decimal_places=2)
self.assertEqual(f.clean('.01'), decimal.Decimal(".01"))
msg = "'Ensure that there are no more than 0 digits before the decimal point.'"
with self.assertRaisesMessage(ValidationError, msg):
f.clean('1.1')
def test_decimalfield_scientific(self):
f = DecimalField(max_digits=2, decimal_places=2)
self.assertEqual(f.clean('1E+2'), decimal.Decimal('1E+2'))
self.assertEqual(f.clean('1e+2'), decimal.Decimal('1E+2'))
with self.assertRaisesMessage(ValidationError, "Ensure that there are no more"):
f.clean('0.546e+2')
def test_decimalfield_widget_attrs(self):
f = DecimalField(max_digits=6, decimal_places=2)
self.assertEqual(f.widget_attrs(Widget()), {})
self.assertEqual(f.widget_attrs(NumberInput()), {'step': '0.01'})
f = DecimalField(max_digits=10, decimal_places=0)
self.assertEqual(f.widget_attrs(NumberInput()), {'step': '1'})
f = DecimalField(max_digits=19, decimal_places=19)
self.assertEqual(f.widget_attrs(NumberInput()), {'step': '1e-19'})
f = DecimalField(max_digits=20)
self.assertEqual(f.widget_attrs(NumberInput()), {'step': 'any'})
f = DecimalField(max_digits=6, widget=NumberInput(attrs={'step': '0.01'}))
self.assertWidgetRendersTo(f, '<input step="0.01" name="f" type="number" id="id_f" required />')
def test_decimalfield_localized(self):
"""
A localized DecimalField's widget renders to a text input without
number input specific attributes.
"""
f = DecimalField(localize=True)
self.assertWidgetRendersTo(f, '<input id="id_f" name="f" type="text" required />')
def test_decimalfield_changed(self):
f = DecimalField(max_digits=2, decimal_places=2)
d = decimal.Decimal("0.1")
self.assertFalse(f.has_changed(d, '0.10'))
self.assertTrue(f.has_changed(d, '0.101'))
with translation.override('fr'), self.settings(USE_L10N=True):
f = DecimalField(max_digits=2, decimal_places=2, localize=True)
localized_d = formats.localize_input(d) # -> '0,1' in French
self.assertFalse(f.has_changed(d, localized_d))
@override_settings(USE_L10N=False, DECIMAL_SEPARATOR=',')
def test_decimalfield_support_decimal_separator(self):
f = DecimalField(localize=True)
self.assertEqual(f.clean('1001,10'), decimal.Decimal("1001.10"))
self.assertEqual(f.clean('1001.10'), decimal.Decimal("1001.10"))
@override_settings(USE_L10N=False, DECIMAL_SEPARATOR=',', USE_THOUSAND_SEPARATOR=True,
THOUSAND_SEPARATOR='.')
def test_decimalfield_support_thousands_separator(self):
f = DecimalField(localize=True)
self.assertEqual(f.clean('1.001,10'), decimal.Decimal("1001.10"))
msg = "'Enter a number.'"
with self.assertRaisesMessage(ValidationError, msg):
f.clean('1,001.1')