def test_parse_double_quotes_inside_single():
parser = Parser()
command = "'\"1\"'"
tokenized = parser.parse(command).to_list()
assert len(tokenized) == 1
__check_token(Token(TokenType.SINGLE_QUOTED, "'\"1\"'"), tokenized[0])
class Interpreter:
"""
Interprets a command given in a string representation.
Creates a local environment once constructed.
"""
def __init__(self, controller):
self._parser = Parser()
self._preprocessor = Preprocessor()
self._environment = Environment()
self._factory_manager = FactoryManager(self._environment, controller)
def process(self, command):
"""
Passes the given command through parser and preprocessor.
Creates and executes a command built with a tokenized result.
:param command: command in a string representation
"""
tokenized = self._parser.parse(command)
substituted = self._preprocessor.process(tokenized, self._environment)
final_tokenized = self._parser.parse(substituted.make_string())
# We needed to store empty tokens at the first step to convert the tokenized result
# to a string to perform substitution.
final_tokenized.remove(TokenType.EMPTY)
factory = self._factory_manager.choose_factory(final_tokenized)
executable = factory.create_executable(final_tokenized)
executable.execute()
def test_parse_double_quotes():
parser = Parser()
command = "\"double\""
tokenized = parser.parse(command).to_list()
assert len(tokenized) == 1
__check_token(Token(TokenType.DOUBLE_QUOTED, "\"double\""), tokenized[0])
def test_parse_spaces():
parser = Parser()
command = " "
tokenized = parser.parse(command).to_list()
assert len(tokenized) == 3
for token in tokenized:
__check_token(Token(TokenType.EMPTY, " "), token)
def test_empty_pipe():
parser = Parser()
command = "||"
tokenized = parser.parse(command).to_list()
assert len(tokenized) == 2
__check_token(Token(TokenType.PIPE, "|"), tokenized[0])
__check_token(Token(TokenType.PIPE, "|"), tokenized[1])
def test_parse_subsequent_quotes():
parser = Parser()
command = "''\"\"''"
tokenized = parser.parse(command).to_list()
assert len(tokenized) == 3
__check_token(Token(TokenType.SINGLE_QUOTED, "''"), tokenized[0])
__check_token(Token(TokenType.DOUBLE_QUOTED, "\"\""), tokenized[1])
__check_token(Token(TokenType.SINGLE_QUOTED, "''"), tokenized[2])
def test_parse_spaces_at_ends():
parser = Parser()
command = " simple "
tokenized = parser.parse(command).to_list()
assert len(tokenized) == 3
__check_token(Token(TokenType.EMPTY, " "), tokenized[0])
__check_token(Token(TokenType.SIMPLE, "simple"), tokenized[1])
__check_token(Token(TokenType.EMPTY, " "), tokenized[2])
def test_parse_assignment():
parser = Parser()
command = "var=\"1\""
tokenized = parser.parse(command).to_list()
assert len(tokenized) == 3
__check_token(Token(TokenType.SIMPLE, "var"), tokenized[0])
__check_token(Token(TokenType.ASSIGNMENT, "="), tokenized[1])
__check_token(Token(TokenType.DOUBLE_QUOTED, "\"1\""), tokenized[2])
def test_fail_on_incorrect_quotes():
parser = Parser()
mixed = "'\"'\""
unclosed_single = "'\"\""
unclosed_double = "''\""
with pytest.raises(Exception):
_ = parser.parse(mixed)
with pytest.raises(Exception):
_ = parser.parse(unclosed_single)
with pytest.raises(Exception):
_ = parser.parse(unclosed_double)
def test_parse_pipe():
parser = Parser()
command = "pwd|pwd |pwd | pwd| pwd"
tokenized = parser.parse(command).to_list()
expected = [
Token(TokenType.SIMPLE, "pwd"),
Token(TokenType.PIPE, "|"),
Token(TokenType.SIMPLE, "pwd"),
Token(TokenType.EMPTY, " "),
Token(TokenType.PIPE, "|"),
Token(TokenType.SIMPLE, "pwd"),
Token(TokenType.EMPTY, " "),
Token(TokenType.PIPE, "|"),
Token(TokenType.EMPTY, " "),
Token(TokenType.SIMPLE, "pwd"),
Token(TokenType.PIPE, "|"),
Token(TokenType.EMPTY, " "),
Token(TokenType.SIMPLE, "pwd")
]
assert len(tokenized) == len(expected)
for i, token in enumerate(tokenized):
__check_token(expected[i], token)
def test_parse_empty():
parser = Parser()
command = ""
tokenized = parser.parse(command).to_list()
assert len(tokenized) == 0
def __init__(self, controller):
self._parser = Parser()
self._preprocessor = Preprocessor()
self._environment = Environment()
self._factory_manager = FactoryManager(self._environment, controller)