def test__sorts_sequences(self):
self.expectThat(
describe_canonical([3, 1, 2]),
Equals((1, 2, 3)))
self.expectThat(
describe_canonical([[1, 2], [1, 1]]),
Equals(((1, 1), (1, 2))))
def test__passes_numbers_through(self):
self.expectThat(describe_canonical(1),
MatchesAll(IsInstance(int), Equals(1)))
self.expectThat(describe_canonical(1),
MatchesAll(IsInstance(int), Equals(1)))
self.expectThat(describe_canonical(1.0),
MatchesAll(IsInstance(float), Equals(1.0)))
def test__sorts_mappings_by_key_and_value(self):
class inth(int):
"""An `int` that hashes independently from its value.
This lets us use the same numeric key twice in a dict. Strictly
this is an abuse, but it helps to demonstrate a point here, that
values are considered when sorting.
"""
__hash__ = object.__hash__
mapping = {
(1, inth(2)): "foo",
(1, inth(2)): "bar",
(1, inth(1)): "foo",
(1, inth(1)): "bar",
}
expected = (
((1, 1), "bar"),
((1, 1), "foo"),
((1, 2), "bar"),
((1, 2), "foo"),
)
self.expectThat(
describe_canonical(mapping),
Equals(expected))
def test__recursively_calls_mapping_keys_and_values(self):
mapping = {"key\u1234".encode("utf-8"): ["b", "a", "r"]}
expected = (
("key\u1234", ("a", "b", "r")),
)
self.expectThat(
describe_canonical(mapping),
Equals(expected))
def test__decodes_byte_strings(self):
string = factory.make_string().encode("utf-8")
self.expectThat(
describe_canonical(string),
MatchesAll(
IsInstance(str),
Not(Is(string)),
Equals(string.decode("utf-8")),
),
)
def test__returns_mappings_as_tuples(self):
self.expectThat(describe_canonical({1: 2}), Equals(((1, 2),)))
def test__recursively_calls_sequence_elements(self):
self.expectThat(describe_canonical([1, [2, 3]]), Equals((1, (2, 3))))
def test__returns_sequences_as_tuples(self):
self.expectThat(describe_canonical([1, 2, 3]), Equals((1, 2, 3)))
def test__passes_unicode_strings_through(self):
string = factory.make_string()
self.assertThat(string, IsInstance(str))
self.expectThat(describe_canonical(string), Is(string))
def test__passes_True_False_and_None_through(self):
self.expectThat(describe_canonical(True), Is(True))
self.expectThat(describe_canonical(False), Is(False))
self.expectThat(describe_canonical(None), Is(None))
