def test_str_method(self):
# Assert basic format and trailing comma.
err = ValidationError([MinimalDifference('A')], 'invalid data')
expected = """
invalid data (1 difference): [
MinimalDifference('A'),
]
"""
expected = textwrap.dedent(expected).strip()
self.assertEqual(str(err), expected)
# Assert without description.
err = ValidationError([MinimalDifference('A')]) # <- No description!
expected = """
1 difference: [
MinimalDifference('A'),
]
"""
expected = textwrap.dedent(expected).strip()
self.assertEqual(str(err), expected)
# Assert "no cacheing"--objects that inhereit from some
# Exceptions can cache their str--but ValidationError should
# not do this.
err._differences = [MinimalDifference('B')]
err._description = 'changed'
updated = textwrap.dedent("""
changed (1 difference): [
MinimalDifference('B'),
]
""").strip()
self.assertEqual(str(err), updated)
# Assert dict format and trailing comma.
err = ValidationError(
{
'x': MinimalDifference('A'),
'y': MinimalDifference('B')
}, 'invalid data')
regex = textwrap.dedent(r"""
invalid data \(2 differences\): \{
'[xy]': MinimalDifference\('[AB]'\),
'[xy]': MinimalDifference\('[AB]'\),
\}
""").strip()
self.assertRegex(str(err), regex) # <- Using regex because dict order
def test_repr(self):
err = ValidationError([MinimalDifference('A')]) # <- No description.
expected = "ValidationError([MinimalDifference('A')])"
self.assertEqual(repr(err), expected)
err = ValidationError([MinimalDifference('A')], 'description string')
expected = "ValidationError([MinimalDifference('A')], 'description string')"
self.assertEqual(repr(err), expected)
# Objects that inhereit from some Exceptions can cache their
# repr--but ValidationError should not do this.
err._differences = [MinimalDifference('B')]
err._description = 'changed'
self.assertNotEqual(repr(err), expected,
'exception should not cache repr')
updated = "ValidationError([MinimalDifference('B')], 'changed')"
self.assertEqual(repr(err), updated)
