def test_it_finds_the_first_instance_of_the_key(self):
tuple_list = [("hello", "world"), ("goodbye", "KEY")]
key = "goodbye"
value = get_key_from_tuple_list(key, tuple_list)
assert isinstance(value, tuple)
assert len(value) == 2
assert value[0] == "KEY"
assert value[1] == 1
def test_it_returns_the_value_with_index(self):
tuple_list = [("hello", "world"), ("goodbye", "KEY")]
key = "hello"
value = get_key_from_tuple_list(key, tuple_list)
assert value[0] == "world"
assert value[1] == 0
def test_raises_error_with_invalid_tuple_in_list(self):
tuple_list = [("hello", "world"), (), ("something", "wonthit")]
key = "something"
with pytest.raises(Exception):
get_key_from_tuple_list(key, tuple_list)
def test_it_immediately_exits_when_key_is_found(self):
tuple_list = [("hello", "world"), ()]
key = "hello"
value = get_key_from_tuple_list(key, tuple_list)
assert value[0] == "world"
assert value[1] == 0
def test_unfound_value_is_gives_negative_one_index(self):
tuple_list = [("hello", "world"), ("goodbye", "KEY")]
key = "unfound"
value = get_key_from_tuple_list(key, tuple_list)
assert value[0] == "unfound"
assert value[1] == -1
def test_it_uses_the_key_value_if_no_key_is_found(self):
tuple_list = [("hello", "world"), ("goodbye", "KEY")]
key = "notthere"
value = get_key_from_tuple_list(key, tuple_list)
assert value[0] == "notthere"
assert value[1] == -1
