def test_correct_directory():
command = Pwd()
command.set_args(["pwd"])
output = IOChannel()
command.set_output_channel(output)
command.execute()
assert output.read() == os.getcwd() + '\n'
def test_external_with_no_args():
command = CallExternal()
command.set_args(["sort"])
output = IOChannel()
command.set_output_channel(output)
command.execute()
expected = ""
assert output.read() == expected
def test_external_to_channel():
command = CallExternal()
command.set_args(["git", "--help"])
output = IOChannel()
command.set_output_channel(output)
command.execute()
actual = output.read()
assert actual[:5] == "usage"
def test_echo_empty():
command = Echo()
output = IOChannel()
command.set_args(["echo"])
command.set_output_channel(output)
command.execute()
expected = "\n"
assert output.read() == expected
def test_echo_several():
command = Echo()
output = IOChannel()
command.set_args(["echo", "my", "input"])
command.set_output_channel(output)
command.execute()
expected = "my input\n"
assert output.read() == expected
def test_wc_from_argument():
command = Wc()
output = IOChannel()
command.set_args(["wc", "Bash-CLI/src/tests/data/example.txt"])
command.set_output_channel(output)
command.execute()
expected = "3 4 21\n"
assert output.read() == expected
def test_external_with_many_args():
command = CallExternal()
command.set_args(["echo", "1", "2", "3"])
output = IOChannel()
command.set_output_channel(output)
command.execute()
expected = "1 2 3\n"
assert output.read() == expected
def test_cat_from_argument():
command = Cat()
output = IOChannel()
command.set_args(["cat", "Bash-CLI/src/tests/data/example.txt"])
command.set_output_channel(output)
command.execute()
expected = "first line\nsecond\n123"
assert output.read() == expected
def test_pipe_single_command():
pipe = Pipe()
command = Echo()
command.set_args(["echo", "1"])
output = IOChannel()
command.set_output_channel(output)
pipe.append(command)
pipe.execute()
assert output.read() == "1\n"
def test_pwd_not_read_from_pipe():
pipe = Pipe()
first_command = Echo()
first_command.set_args(["echo", "1"])
pipe.append(first_command)
second_command = Pwd()
second_command.set_args(["pwd"])
output = IOChannel()
second_command.set_output_channel(output)
pipe.append(second_command)
pipe.execute()
assert output.read() == os.getcwd() + '\n'
def test_cat_pass_to_pipe():
pipe = Pipe()
first_command = Cat()
first_command.set_args(["cat", "Bash-CLI/src/tests/data/numbers.txt"])
pipe.append(first_command)
second_command = Cat()
second_command.set_args(["cat"])
output = IOChannel()
second_command.set_output_channel(output)
pipe.append(second_command)
pipe.execute()
assert output.read() == '3\n2\n1'
def test_pwd_to_pipe():
pipe = Pipe()
first_command = Pwd()
first_command.set_args(["pwd"])
pipe.append(first_command)
second_command = Cat()
second_command.set_args(["cat"])
output = IOChannel()
second_command.set_output_channel(output)
pipe.append(second_command)
pipe.execute()
assert output.read() == os.getcwd() + '\n'
def test_echo_pass_arguments():
pipe = Pipe()
first_command = Echo()
first_command.set_args(["echo", "123"])
pipe.append(first_command)
second_command = Cat()
second_command.set_args(["cat"])
output = IOChannel()
second_command.set_output_channel(output)
pipe.append(second_command)
pipe.execute()
assert output.read() == "123\n"
def test_echo_not_read_arguments():
pipe = Pipe()
first_command = Cat()
first_command.set_args(["cat", "Bash-CLI/src/tests/data/numbers.txt"])
pipe.append(first_command)
second_command = Echo()
second_command.set_args(["echo"])
output = IOChannel()
second_command.set_output_channel(output)
pipe.append(second_command)
pipe.execute()
assert output.read() == '\n'
def test_external_from_pipe():
pipe = Pipe()
first_command = Cat()
first_command.set_args(["cat", "Bash-CLI/src/tests/data/numbers.txt"])
pipe.append(first_command)
second_command = CallExternal()
second_command.set_args(["sort"])
output = IOChannel()
second_command.set_output_channel(output)
pipe.append(second_command)
pipe.execute()
assert output.read() == "1\n2\n3\n"
def test_wc_from_pipe():
pipe = Pipe()
first_command = Echo()
first_command.set_args(["echo", "1", "23"])
pipe.append(first_command)
second_command = Wc()
second_command.set_args(["wc"])
output = IOChannel()
second_command.set_output_channel(output)
pipe.append(second_command)
pipe.execute()
assert output.read() == "1 2 5\n"
def test_mixed():
channel = IOChannel()
channel.write("1")
output = channel.read()
assert output == "1"
channel.write("2")
output = channel.read()
assert output == "12"
def test_multiple_write():
channel = IOChannel()
channel.write("1")
channel.write("2")
channel.write("3")
output = channel.read()
assert output == "123"
def append(self, command):
"""
Appends a command to the end of the pipe.
Connects it with a previous one (if exists) with a new channel.
"""
if self._commands:
channel_from_last = IOChannel()
command.set_input_channel(channel_from_last)
self._commands[-1].set_output_channel(channel_from_last)
self._commands.append(command)
def test_external_from_channel():
command = CallExternal()
command.set_args(["sort"])
output = IOChannel()
input = IOChannel()
input.write("3\n2\n1\n")
command.set_input_channel(input)
command.set_output_channel(output)
command.execute()
expected = "1\n2\n3\n"
assert output.read() == expected
def test_external_ignores_stdin():
command = CallExternal()
command.set_args(["echo", "1"])
output = IOChannel()
input = IOChannel()
input.write("input")
command.set_input_channel(input)
command.set_output_channel(output)
command.execute()
expected = "1\n"
assert output.read() == expected
def test_echo_ignores_input_channel():
command = Echo()
input = IOChannel()
input.write("my input")
output = IOChannel()
command.set_args(["echo"])
command.set_output_channel(output)
command.set_input_channel(input)
command.execute()
expected = "\n"
assert output.read() == expected
def test_wc_from_channel():
command = Wc()
input = IOChannel()
input.write("my input")
output = IOChannel()
command.set_args(["cat"])
command.set_output_channel(output)
command.set_input_channel(input)
command.execute()
expected = "1 2 8\n"
assert output.read() == expected
def test_single_io():
channel = IOChannel()
channel.write("value")
output = channel.read()
assert output == "value"