def test_valid(self, operands, expected):
toks = find.tokenize_operands(operands)
actual = find.expr_from_tokens(toks)
# Check the type because whether or not the subtree correctly parsed is not the scope of this test
assert type(actual) is expected
def test_look_before_eating(self):
toks = find.tokenize_operands("-o -a ( )".split())
toks_cpy = deepcopy(toks)
with pytest.raises(CommandParseError):
find.ASTPrimary.from_tokens(toks)
assert toks == toks_cpy
class TestASTPrimary(object):
def test_empty_tokens_throws_ValueError(self):
with pytest.raises(ValueError):
find.ASTPrimary.from_tokens([])
def test_invalid_tokens_throws_CommandParseError(self):
toks = find.tokenize_operands("-o -a ( )".split())
with pytest.raises(CommandParseError):
find.ASTPrimary.from_tokens(toks)
def test_look_before_eating(self):
toks = find.tokenize_operands("-o -a ( )".split())
toks_cpy = deepcopy(toks)
with pytest.raises(CommandParseError):
find.ASTPrimary.from_tokens(toks)
assert toks == toks_cpy
@pytest.mark.parametrize(
("tinput", "expected", "remainder"),
[(find.tokenize_operands(["-test"]), find.ASTPrimary("test", []), []),
(find.tokenize_operands(["-test", "a", "b"
]), find.ASTPrimary("test", ["a", "b"]), []),
(find.tokenize_operands(
["-test1", "-test2"]), find.ASTPrimary(
"test1", []), [(find.OperandTokens.OPERAND_NAME, "test2")]),
(find.tokenize_operands(["-test1", "a", "b", "-test2"]),
find.ASTPrimary("test1", ["a", "b"]), [
(find.OperandTokens.OPERAND_NAME, "test2")
]),
(find.tokenize_operands(["-test1", "a", "(", "b", "-test2"]),
find.ASTPrimary(
"test1", ["a"]), [(find.OperandTokens.LPAREN, "("),
(find.OperandTokens.OPERAND_VALUE, "b"),
(find.OperandTokens.OPERAND_NAME, "test2")])])
def test_valid(self, tinput, expected, remainder):
actual = find.ASTPrimary.from_tokens(tinput)
assert actual == expected
assert tinput == remainder
def test_big():
tinput = "-1 a -2 b ! -3 c -o ( -4 -5 -o -6 )"
expected = find.ASTBinOr([
find.ASTBinAnd([
find.ASTPrimary("1", ["a"]),
find.ASTPrimary("2", ["b"]),
find.ASTBinNot(find.ASTPrimary("3", ["c"]))
]),
find.ASTBinAnd([
find.ASTBinOr([
find.ASTBinAnd(
[find.ASTPrimary("4", []),
find.ASTPrimary("5", [])]),
find.ASTBinAnd([find.ASTPrimary("6", [])])
])
])
])
assert find.ASTBinOr.from_tokens(find.tokenize_operands(
tinput.split())) == expected
def test_unclosed_parentheses_throws_CommandParseError(self):
toks = find.tokenize_operands("( -1 -2 -3".split())
with pytest.raises(CommandParseError):
find.expr_from_tokens(toks)
def test_invalid_tokens_throws_CommandParseError(self):
toks = find.tokenize_operands("-o -a ( )".split())
with pytest.raises(CommandParseError):
find.expr_from_tokens(toks)