def test_repl_remains_running_despite_errors():
Helpers.test_chain(
_given_a_repl_with_mocked_streams, _when_an_error_is_thrown,
_input_is_evaluated_and_output_is_displayed([
("", ""),
("\n", ""),
(integer(10), "10"),
(integer(20), "20"),
(invoke(symbol("+"), integer(1), integer(2)), "3"),
]))
def test_repl_evaluates_input_and_displays_it():
Helpers.test_chain(
_given_a_repl_with_mocked_streams,
_input_is_evaluated_and_output_is_displayed([
("", ""),
("\n", ""),
(integer(10), "10"),
(integer(20), "20"),
(invoke(symbol("+"), integer(1), integer(2)), "3"),
]))
def test_repl_uses_standard_input_and_output_by_default():
Helpers.test_chain(_given_a_real_repl, _default_input_is_used,
_default_output_is_used)
def test_repl_prompts_for_input_on_every_tick():
Helpers.test_chain(_given_a_repl_with_mocked_streams, _tick_many_times,
_input_used_once_per_tick)
def test_repl_displays_prompt_on_every_tick():
Helpers.test_chain(_given_a_repl_with_mocked_streams,
_prompt_is_printed_on_each_tick,
_output_used_at_least_the_number_of_ticks)
def test_repl_displays_welcome_message_on_first_tick_only():
Helpers.test_chain(_given_a_repl_with_mocked_streams, _tick,
_output_used_at_least_once,
_output_usage_increases_linearly_with_each_tick)