def test_collection_all_returns_a_list_of_records():
rows = Collection(Record(['id'], [i]) for i in range(3))
assert rows.all() == [
Record(['id'], [0]),
Record(['id'], [1]),
Record(['id'], [2])
]
def test_collection_slice_iter():
rows = Collection(Record(['id'], [i]) for i in range(10))
for i, row in enumerate(rows[:5]):
check_id(i, row)
for i, row in enumerate(rows):
check_id(i, row)
assert len(rows) == 10
def test_collection_multiple_iter():
rows = Collection(Record(['id'], [i]) for i in range(10))
i = enumerate(iter(rows))
j = enumerate(iter(rows))
check_id(*next(i)) # Cache first row.
check_id(*next(j)) # Read first row from cache.
check_id(*next(j)) # Cache second row.
check_id(*next(i)) # Read second row from cache.
def test_collection_one_defaults_to_none():
rows = Collection(iter([]))
assert rows.one() is None
def test_collection_one_returns_a_single_record():
rows = Collection(Record(['id'], [i]) for i in range(1))
assert rows.one() == Record(['id'], [0])
def test_collection_iter():
rows = Collection(Record(['id'], [i]) for i in range(10))
for i, row in enumerate(rows):
check_id(i, row)
def test_collection_first_raises_default_if_its_an_exception_instance():
rows = Collection(iter([]))
raises(Exception, rows.first, default=Exception("testing"))
def test_collection_first_raises_default_if_its_an_exception_subclass():
rows = Collection(iter([]))
raises(Exception, rows.first, default=Exception)
def test_collection_first_default_is_overridable():
rows = Collection(iter([]))
assert rows.first(default="Spam & Eggs") == "Spam & Eggs"
def test_collection_next():
rows = Collection(Record(['id'], [i]) for i in range(10))
for i in range(10):
check_id(i, next(rows))
def test_collection_scalar_raises_when_more_than_one():
rows = Collection(Record(['id'], [i]) for i in range(3))
raises(ValueError, rows.scalar)
def test_collection_scalar_default_is_overridable():
rows = Collection(iter([]))
assert rows.scalar(default="testing") == "testing"
def test_collection_scalar_defaults_to_none():
rows = Collection(iter([]))
assert rows.scalar() is None
def test_collection_scalar_returns_a_single_record():
rows = Collection(Record(['id'], [i]) for i in range(1))
assert rows.scalar() == 0