def test_execute_command_executes_only_selected_range(self):
tokens = ["echo", "echo", "hello"]
self.assertEqual(stream_to_string(execute_command(tokens, 0, 2)),
"echo")
self.assertEqual(stream_to_string(execute_command(tokens, 0, 3)),
"echo hello")
self.assertEqual(stream_to_string(execute_command(tokens, 1, 3)),
"hello")
def test_wc_returns_correct_info_of_passed_output_stream(self):
prev_command_result = output_stream()
prev_command_result.write_to_stream("hello world")
output = execute_command(["wc"], 0, 1, prev_command_result)
self.assertEqual(stream_to_string(output), "1 2 11")
def test_cat_print_contents_of_passed_output_stream(self):
prev_command_result = output_stream()
prev_command_result.write_to_stream("hello world")
output = execute_command(["cat"], 0, 1, prev_command_result)
self.assertEqual(stream_to_string(output), "hello world")
def test_exit_command_calls_for_program_exit(self, exit_mock: Mock):
execute_command(["exit"], 0, 1)
exit_mock.assert_called()
def test_dollar_sign_correct_reveal_and_expounds_vars(self):
execute_command(["x=ho"], 0, 1)
output = execute_command(["ec$x", "hello"], 0, 2)
self.assertEqual(stream_to_string(output), "hello")
def test_wc_returns_correct_info_about_file(self):
output = execute_command(["wc", "helloworld.txt"], 0, 2)
self.assertEqual(stream_to_string(output), "1 3 13")
def test_pwd_returns_cur_working_directory(self, pwd_mock: Mock):
self.assertEqual(stream_to_string(execute_command(["pwd"], 0, 1)),
"/urhere")
pwd_mock.assert_called_once()
def test_cat_opens_file_and_prints_it_to_output(self):
output = execute_command(["cat", "helloworld.txt"], 0, 2)
self.assertEqual(stream_to_string(output), "one two three")
def test_echo_respects_separate_words(self):
output = execute_command(["echo", "hello", "world"], 0, 3)
self.assertEqual(stream_to_string(output), "hello world")