def test_keys_none_exist():
context = Context({'k1': 'v1', 'k2': False, 'k3': ['one', 'two']})
k4, = context.keys_of_type_exist(('k4', list))
k5, k6 = context.keys_of_type_exist(
('k5', bool),
('k6', list),
)
assert k4
assert k4.key == 'k4'
assert not k4.key_in_context
assert k4.expected_type is list
assert k4.is_expected_type is None
assert not k4.has_value
assert k5
assert k5.key == 'k5'
assert not k5.key_in_context
assert k5.expected_type is bool
assert k5.is_expected_type is None
assert not k5.has_value
assert k6
assert k6.key == 'k6'
assert not k6.key_in_context
assert k6.expected_type is list
assert k6.is_expected_type is None
assert not k6.has_value
def test_keys_of_type_exist_triple():
context = Context({'k1': 'v1', 'k2': False, 'k3': ['one', 'two']})
k3, k2, k1 = context.keys_of_type_exist(('k3', list), ('k2', list),
('k1', str))
assert k1
assert k1.key == 'k1'
assert k1.key_in_context
assert k1.expected_type is str
assert k1.is_expected_type
assert k1.has_value
assert k2
assert k2.key == 'k2'
assert k2.key_in_context
assert k2.expected_type is list
assert not k2.is_expected_type
assert k2.has_value
assert k3
assert k3.key == 'k3'
assert k3.key_in_context
assert k3.expected_type is list
assert k3.is_expected_type
assert k3.has_value
def test_keys_of_type_exist_single():
"""return a single tuple"""
context = Context({'k1': 'v1', 'k2': False, 'k3': ['one', 'two']})
k1, = context.keys_of_type_exist(('k1', str), )
assert k1
assert k1.key == 'k1'
assert k1.key_in_context
assert k1.expected_type is str
assert k1.is_expected_type
assert k1.has_value
