def replace_operators(self, node: cst.Comparison) -> cst.Comparison:
prev_comparator = node.left
comparisons = []
for target in node.comparisons:
op, comparator = target.operator, target.comparator
if isinstance(op, (cst.Is, cst.IsNot)):
if isinstance(prev_comparator, self.PRIMITIVES) or isinstance(
comparator, self.PRIMITIVES):
target = target.with_changes(operator=cst.Equal(
whitespace_before=op.whitespace_before,
whitespace_after=op.whitespace_after,
) if isinstance(op, cst.Is) else cst.NotEqual(
whitespace_before=op.whitespace_before,
whitespace_after=op.whitespace_after,
))
comparisons.append(target)
prev_comparator = comparator
return node.with_changes(comparisons=comparisons)
class ComparisonTest(CSTNodeTest):
@data_provider((
# Simple comparison statements
(
cst.Comparison(
cst.Name("foo"),
(cst.ComparisonTarget(cst.LessThan(), cst.Integer("5")), ),
),
"foo < 5",
),
(
cst.Comparison(
cst.Name("foo"),
(cst.ComparisonTarget(cst.NotEqual(), cst.Integer("5")), ),
),
"foo != 5",
),
(
cst.Comparison(
cst.Name("foo"),
(cst.ComparisonTarget(cst.Is(), cst.Name("True")), )),
"foo is True",
),
(
cst.Comparison(
cst.Name("foo"),
(cst.ComparisonTarget(cst.IsNot(), cst.Name("False")), ),
),
"foo is not False",
),
(
cst.Comparison(
cst.Name("foo"),
(cst.ComparisonTarget(cst.In(), cst.Name("bar")), )),
"foo in bar",
),
(
cst.Comparison(
cst.Name("foo"),
(cst.ComparisonTarget(cst.NotIn(), cst.Name("bar")), ),
),
"foo not in bar",
),
# Comparison with parens
(
cst.Comparison(
lpar=(cst.LeftParen(), ),
left=cst.Name("foo"),
comparisons=(cst.ComparisonTarget(
operator=cst.NotIn(), comparator=cst.Name("bar")), ),
rpar=(cst.RightParen(), ),
),
"(foo not in bar)",
),
(
cst.Comparison(
left=cst.Name("a",
lpar=(cst.LeftParen(), ),
rpar=(cst.RightParen(), )),
comparisons=(
cst.ComparisonTarget(
operator=cst.Is(
whitespace_before=cst.SimpleWhitespace(""),
whitespace_after=cst.SimpleWhitespace(""),
),
comparator=cst.Name("b",
lpar=(cst.LeftParen(), ),
rpar=(cst.RightParen(), )),
),
cst.ComparisonTarget(
operator=cst.Is(
whitespace_before=cst.SimpleWhitespace(""),
whitespace_after=cst.SimpleWhitespace(""),
),
comparator=cst.Name("c",
lpar=(cst.LeftParen(), ),
rpar=(cst.RightParen(), )),
),
),
),
"(a)is(b)is(c)",
),
# Valid expressions that look like they shouldn't parse
(
cst.Comparison(
left=cst.Integer("5"),
comparisons=(cst.ComparisonTarget(
operator=cst.NotIn(
whitespace_before=cst.SimpleWhitespace("")),
comparator=cst.Name("bar"),
), ),
),
"5not in bar",
),
# Validate that spacing works properly
(
cst.Comparison(
lpar=(cst.LeftParen(
whitespace_after=cst.SimpleWhitespace(" ")), ),
left=cst.Name("foo"),
comparisons=(cst.ComparisonTarget(
operator=cst.NotIn(
whitespace_before=cst.SimpleWhitespace(" "),
whitespace_between=cst.SimpleWhitespace(" "),
whitespace_after=cst.SimpleWhitespace(" "),
),
comparator=cst.Name("bar"),
), ),
rpar=(cst.RightParen(
whitespace_before=cst.SimpleWhitespace(" ")), ),
),
"( foo not in bar )",
),
# Do some complex nodes
(
cst.Comparison(
left=cst.Name("baz"),
comparisons=(cst.ComparisonTarget(
operator=cst.Equal(),
comparator=cst.Comparison(
lpar=(cst.LeftParen(), ),
left=cst.Name("foo"),
comparisons=(cst.ComparisonTarget(
operator=cst.NotIn(),
comparator=cst.Name("bar")), ),
rpar=(cst.RightParen(), ),
),
), ),
),
"baz == (foo not in bar)",
CodeRange((1, 0), (1, 23)),
),
(
cst.Comparison(
left=cst.Name("a"),
comparisons=(
cst.ComparisonTarget(operator=cst.GreaterThan(),
comparator=cst.Name("b")),
cst.ComparisonTarget(operator=cst.GreaterThan(),
comparator=cst.Name("c")),
),
),
"a > b > c",
CodeRange((1, 0), (1, 9)),
),
# Is safe to use with word operators if it's leading/trailing children are
(
cst.IfExp(
body=cst.Comparison(
left=cst.Name("a"),
comparisons=(cst.ComparisonTarget(
operator=cst.GreaterThan(),
comparator=cst.Name(
"b",
lpar=(cst.LeftParen(), ),
rpar=(cst.RightParen(), ),
),
), ),
),
test=cst.Comparison(
left=cst.Name("c",
lpar=(cst.LeftParen(), ),
rpar=(cst.RightParen(), )),
comparisons=(cst.ComparisonTarget(
operator=cst.GreaterThan(),
comparator=cst.Name("d")), ),
),
orelse=cst.Name("e"),
whitespace_before_if=cst.SimpleWhitespace(""),
whitespace_after_if=cst.SimpleWhitespace(""),
),
"a > (b)if(c) > d else e",
),
# is safe to use with word operators if entirely surrounded in parenthesis
(
cst.IfExp(
body=cst.Name("a"),
test=cst.Comparison(
left=cst.Name("b"),
comparisons=(cst.ComparisonTarget(
operator=cst.GreaterThan(),
comparator=cst.Name("c")), ),
lpar=(cst.LeftParen(), ),
rpar=(cst.RightParen(), ),
),
orelse=cst.Name("d"),
whitespace_after_if=cst.SimpleWhitespace(""),
whitespace_before_else=cst.SimpleWhitespace(""),
),
"a if(b > c)else d",
),
))
def test_valid(self,
node: cst.CSTNode,
code: str,
position: Optional[CodeRange] = None) -> None:
self.validate_node(node,
code,
parse_expression,
expected_position=position)
@data_provider((
(
lambda: cst.Comparison(
cst.Name("foo"),
(cst.ComparisonTarget(cst.LessThan(), cst.Integer("5")), ),
lpar=(cst.LeftParen(), ),
),
"left paren without right paren",
),
(
lambda: cst.Comparison(
cst.Name("foo"),
(cst.ComparisonTarget(cst.LessThan(), cst.Integer("5")), ),
rpar=(cst.RightParen(), ),
),
"right paren without left paren",
),
(
lambda: cst.Comparison(cst.Name("foo"), ()),
"at least one ComparisonTarget",
),
(
lambda: cst.Comparison(
left=cst.Name("foo"),
comparisons=(cst.ComparisonTarget(
operator=cst.NotIn(whitespace_before=cst.SimpleWhitespace(
"")),
comparator=cst.Name("bar"),
), ),
),
"at least one space around comparison operator",
),
(
lambda: cst.Comparison(
left=cst.Name("foo"),
comparisons=(cst.ComparisonTarget(
operator=cst.NotIn(whitespace_after=cst.SimpleWhitespace(
"")),
comparator=cst.Name("bar"),
), ),
),
"at least one space around comparison operator",
),
# multi-target comparisons
(
lambda: cst.Comparison(
left=cst.Name("a"),
comparisons=(
cst.ComparisonTarget(operator=cst.Is(),
comparator=cst.Name("b")),
cst.ComparisonTarget(
operator=cst.Is(whitespace_before=cst.SimpleWhitespace(
"")),
comparator=cst.Name("c"),
),
),
),
"at least one space around comparison operator",
),
(
lambda: cst.Comparison(
left=cst.Name("a"),
comparisons=(
cst.ComparisonTarget(operator=cst.Is(),
comparator=cst.Name("b")),
cst.ComparisonTarget(
operator=cst.Is(whitespace_after=cst.SimpleWhitespace(
"")),
comparator=cst.Name("c"),
),
),
),
"at least one space around comparison operator",
),
# whitespace around the comparision itself
# a ifb > c else d
(
lambda: cst.IfExp(
body=cst.Name("a"),
test=cst.Comparison(
left=cst.Name("b"),
comparisons=(cst.
ComparisonTarget(operator=cst.GreaterThan(),
comparator=cst.Name("c")), ),
),
orelse=cst.Name("d"),
whitespace_after_if=cst.SimpleWhitespace(""),
),
"Must have at least one space after 'if' keyword.",
),
# a if b > celse d
(
lambda: cst.IfExp(
body=cst.Name("a"),
test=cst.Comparison(
left=cst.Name("b"),
comparisons=(cst.
ComparisonTarget(operator=cst.GreaterThan(),
comparator=cst.Name("c")), ),
),
orelse=cst.Name("d"),
whitespace_before_else=cst.SimpleWhitespace(""),
),
"Must have at least one space before 'else' keyword.",
),
))
def test_invalid(self, get_node: Callable[[], cst.CSTNode],
expected_re: str) -> None:
self.assert_invalid(get_node, expected_re)
class AtomTest(CSTNodeTest):
@data_provider(
(
# Simple identifier
{
"node": cst.Name("test"),
"code": "test",
"parser": parse_expression,
"expected_position": None,
},
# Parenthesized identifier
{
"node": cst.Name(
"test", lpar=(cst.LeftParen(),), rpar=(cst.RightParen(),)
),
"code": "(test)",
"parser": parse_expression,
"expected_position": CodeRange((1, 1), (1, 5)),
},
# Decimal integers
{
"node": cst.Integer("12345"),
"code": "12345",
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.Integer("0000"),
"code": "0000",
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.Integer("1_234_567"),
"code": "1_234_567",
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.Integer("0_000"),
"code": "0_000",
"parser": parse_expression,
"expected_position": None,
},
# Binary integers
{
"node": cst.Integer("0b0000"),
"code": "0b0000",
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.Integer("0B1011_0100"),
"code": "0B1011_0100",
"parser": parse_expression,
"expected_position": None,
},
# Octal integers
{
"node": cst.Integer("0o12345"),
"code": "0o12345",
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.Integer("0O12_345"),
"code": "0O12_345",
"parser": parse_expression,
"expected_position": None,
},
# Hex numbers
{
"node": cst.Integer("0x123abc"),
"code": "0x123abc",
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.Integer("0X12_3ABC"),
"code": "0X12_3ABC",
"parser": parse_expression,
"expected_position": None,
},
# Parenthesized integers
{
"node": cst.Integer(
"123", lpar=(cst.LeftParen(),), rpar=(cst.RightParen(),)
),
"code": "(123)",
"parser": parse_expression,
"expected_position": CodeRange((1, 1), (1, 4)),
},
# Non-exponent floats
{
"node": cst.Float("12345."),
"code": "12345.",
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.Float("00.00"),
"code": "00.00",
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.Float("12.21"),
"code": "12.21",
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.Float(".321"),
"code": ".321",
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.Float("1_234_567."),
"code": "1_234_567.",
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.Float("0.000_000"),
"code": "0.000_000",
"parser": parse_expression,
"expected_position": None,
},
# Exponent floats
{
"node": cst.Float("12345.e10"),
"code": "12345.e10",
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.Float("00.00e10"),
"code": "00.00e10",
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.Float("12.21e10"),
"code": "12.21e10",
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.Float(".321e10"),
"code": ".321e10",
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.Float("1_234_567.e10"),
"code": "1_234_567.e10",
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.Float("0.000_000e10"),
"code": "0.000_000e10",
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.Float("1e+10"),
"code": "1e+10",
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.Float("1e-10"),
"code": "1e-10",
"parser": parse_expression,
"expected_position": None,
},
# Parenthesized floats
{
"node": cst.Float(
"123.4", lpar=(cst.LeftParen(),), rpar=(cst.RightParen(),)
),
"code": "(123.4)",
"parser": parse_expression,
"expected_position": CodeRange((1, 1), (1, 6)),
},
# Imaginary numbers
{
"node": cst.Imaginary("12345j"),
"code": "12345j",
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.Imaginary("1_234_567J"),
"code": "1_234_567J",
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.Imaginary("12345.e10j"),
"code": "12345.e10j",
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.Imaginary(".321J"),
"code": ".321J",
"parser": parse_expression,
"expected_position": None,
},
# Parenthesized imaginary
{
"node": cst.Imaginary(
"123.4j", lpar=(cst.LeftParen(),), rpar=(cst.RightParen(),)
),
"code": "(123.4j)",
"parser": parse_expression,
"expected_position": CodeRange((1, 1), (1, 7)),
},
# Simple elipses
{
"node": cst.Ellipsis(),
"code": "...",
"parser": parse_expression,
"expected_position": None,
},
# Parenthesized elipses
{
"node": cst.Ellipsis(lpar=(cst.LeftParen(),), rpar=(cst.RightParen(),)),
"code": "(...)",
"parser": parse_expression,
"expected_position": CodeRange((1, 1), (1, 4)),
},
# Simple strings
{
"node": cst.SimpleString('""'),
"code": '""',
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.SimpleString("''"),
"code": "''",
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.SimpleString('"test"'),
"code": '"test"',
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.SimpleString('b"test"'),
"code": 'b"test"',
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.SimpleString('r"test"'),
"code": 'r"test"',
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.SimpleString('"""test"""'),
"code": '"""test"""',
"parser": parse_expression,
"expected_position": None,
},
# Validate parens
{
"node": cst.SimpleString(
'"test"', lpar=(cst.LeftParen(),), rpar=(cst.RightParen(),)
),
"code": '("test")',
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.SimpleString(
'rb"test"', lpar=(cst.LeftParen(),), rpar=(cst.RightParen(),)
),
"code": '(rb"test")',
"parser": parse_expression,
"expected_position": CodeRange((1, 1), (1, 9)),
},
# Test that _safe_to_use_with_word_operator allows no space around quotes
{
"node": cst.Comparison(
cst.SimpleString('"a"'),
[
cst.ComparisonTarget(
cst.In(
whitespace_before=cst.SimpleWhitespace(""),
whitespace_after=cst.SimpleWhitespace(""),
),
cst.SimpleString('"abc"'),
)
],
),
"code": '"a"in"abc"',
"parser": parse_expression,
},
{
"node": cst.Comparison(
cst.SimpleString('"a"'),
[
cst.ComparisonTarget(
cst.In(
whitespace_before=cst.SimpleWhitespace(""),
whitespace_after=cst.SimpleWhitespace(""),
),
cst.ConcatenatedString(
cst.SimpleString('"a"'), cst.SimpleString('"bc"')
),
)
],
),
"code": '"a"in"a""bc"',
"parser": parse_expression,
},
# Parenthesis make no spaces around a prefix okay
{
"node": cst.Comparison(
cst.SimpleString('b"a"'),
[
cst.ComparisonTarget(
cst.In(
whitespace_before=cst.SimpleWhitespace(""),
whitespace_after=cst.SimpleWhitespace(""),
),
cst.SimpleString(
'b"abc"',
lpar=[cst.LeftParen()],
rpar=[cst.RightParen()],
),
)
],
),
"code": 'b"a"in(b"abc")',
"parser": parse_expression,
},
{
"node": cst.Comparison(
cst.SimpleString('b"a"'),
[
cst.ComparisonTarget(
cst.In(
whitespace_before=cst.SimpleWhitespace(""),
whitespace_after=cst.SimpleWhitespace(""),
),
cst.ConcatenatedString(
cst.SimpleString('b"a"'),
cst.SimpleString('b"bc"'),
lpar=[cst.LeftParen()],
rpar=[cst.RightParen()],
),
)
],
),
"code": 'b"a"in(b"a"b"bc")',
"parser": parse_expression,
},
# Empty formatted strings
{
"node": cst.FormattedString(start='f"', parts=(), end='"'),
"code": 'f""',
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.FormattedString(start="f'", parts=(), end="'"),
"code": "f''",
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.FormattedString(start='f"""', parts=(), end='"""'),
"code": 'f""""""',
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.FormattedString(start="f'''", parts=(), end="'''"),
"code": "f''''''",
"parser": parse_expression,
"expected_position": None,
},
# Non-empty formatted strings
{
"node": cst.FormattedString(parts=(cst.FormattedStringText("foo"),)),
"code": 'f"foo"',
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.FormattedString(
parts=(cst.FormattedStringExpression(cst.Name("foo")),)
),
"code": 'f"{foo}"',
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.FormattedString(
parts=(
cst.FormattedStringText("foo "),
cst.FormattedStringExpression(cst.Name("bar")),
cst.FormattedStringText(" baz"),
)
),
"code": 'f"foo {bar} baz"',
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.FormattedString(
parts=(
cst.FormattedStringText("foo "),
cst.FormattedStringExpression(cst.Call(cst.Name("bar"))),
cst.FormattedStringText(" baz"),
)
),
"code": 'f"foo {bar()} baz"',
"parser": parse_expression,
"expected_position": None,
},
# Formatted strings with conversions and format specifiers
{
"node": cst.FormattedString(
parts=(
cst.FormattedStringExpression(cst.Name("foo"), conversion="s"),
)
),
"code": 'f"{foo!s}"',
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.FormattedString(
parts=(
cst.FormattedStringExpression(cst.Name("foo"), format_spec=()),
)
),
"code": 'f"{foo:}"',
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.FormattedString(
parts=(
cst.FormattedStringExpression(
cst.Name("today"),
format_spec=(cst.FormattedStringText("%B %d, %Y"),),
),
)
),
"code": 'f"{today:%B %d, %Y}"',
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.FormattedString(
parts=(
cst.FormattedStringExpression(
cst.Name("foo"),
format_spec=(
cst.FormattedStringExpression(cst.Name("bar")),
),
),
)
),
"code": 'f"{foo:{bar}}"',
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.FormattedString(
parts=(
cst.FormattedStringExpression(
cst.Name("foo"),
format_spec=(
cst.FormattedStringExpression(cst.Name("bar")),
cst.FormattedStringText("."),
cst.FormattedStringExpression(cst.Name("baz")),
),
),
)
),
"code": 'f"{foo:{bar}.{baz}}"',
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.FormattedString(
parts=(
cst.FormattedStringExpression(
cst.Name("foo"),
conversion="s",
format_spec=(
cst.FormattedStringExpression(cst.Name("bar")),
),
),
)
),
"code": 'f"{foo!s:{bar}}"',
"parser": parse_expression,
"expected_position": None,
},
# Test equality expression added in 3.8.
{
"node": cst.FormattedString(
parts=(
cst.FormattedStringExpression(
cst.Name("foo"),
equal=cst.AssignEqual(
whitespace_before=cst.SimpleWhitespace(""),
whitespace_after=cst.SimpleWhitespace(""),
),
),
),
),
"code": 'f"{foo=}"',
"parser": _parse_expression_force_38,
"expected_position": None,
},
{
"node": cst.FormattedString(
parts=(
cst.FormattedStringExpression(
cst.Name("foo"),
equal=cst.AssignEqual(
whitespace_before=cst.SimpleWhitespace(""),
whitespace_after=cst.SimpleWhitespace(""),
),
conversion="s",
),
),
),
"code": 'f"{foo=!s}"',
"parser": _parse_expression_force_38,
"expected_position": None,
},
{
"node": cst.FormattedString(
parts=(
cst.FormattedStringExpression(
cst.Name("foo"),
equal=cst.AssignEqual(
whitespace_before=cst.SimpleWhitespace(""),
whitespace_after=cst.SimpleWhitespace(""),
),
conversion="s",
format_spec=(
cst.FormattedStringExpression(cst.Name("bar")),
),
),
),
),
"code": 'f"{foo=!s:{bar}}"',
"parser": _parse_expression_force_38,
"expected_position": None,
},
# Test that equality support doesn't break existing support
{
"node": cst.FormattedString(
parts=(
cst.FormattedStringExpression(
cst.Comparison(
left=cst.Name(
value="a",
),
comparisons=[
cst.ComparisonTarget(
operator=cst.Equal(),
comparator=cst.Name(
value="b",
),
),
],
),
),
),
),
"code": 'f"{a == b}"',
"parser": _parse_expression_force_38,
"expected_position": None,
},
{
"node": cst.FormattedString(
parts=(
cst.FormattedStringExpression(
cst.Comparison(
left=cst.Name(
value="a",
),
comparisons=[
cst.ComparisonTarget(
operator=cst.NotEqual(),
comparator=cst.Name(
value="b",
),
),
],
),
),
),
),
"code": 'f"{a != b}"',
"parser": _parse_expression_force_38,
"expected_position": None,
},
{
"node": cst.FormattedString(
parts=(
cst.FormattedStringExpression(
cst.NamedExpr(
target=cst.Name(
value="a",
),
value=cst.Integer(
value="5",
),
lpar=(cst.LeftParen(),),
rpar=(cst.RightParen(),),
),
),
),
),
"code": 'f"{(a := 5)}"',
"parser": _parse_expression_force_38,
"expected_position": None,
},
{
"node": cst.FormattedString(
parts=(
cst.FormattedStringExpression(
cst.Yield(
value=cst.Integer("1"),
whitespace_after_yield=cst.SimpleWhitespace(" "),
),
),
),
),
"code": 'f"{yield 1}"',
"parser": _parse_expression_force_38,
"expected_position": None,
},
{
"node": cst.FormattedString(
parts=(
cst.FormattedStringText("\\N{X Y}"),
cst.FormattedStringExpression(
cst.Name(value="Z"),
),
),
),
"code": 'f"\\N{X Y}{Z}"',
"parser": parse_expression,
"expected_position": None,
},
# Validate parens
{
"node": cst.FormattedString(
start='f"',
parts=(),
end='"',
lpar=(cst.LeftParen(),),
rpar=(cst.RightParen(),),
),
"code": '(f"")',
"parser": parse_expression,
"expected_position": CodeRange((1, 1), (1, 4)),
},
# Generator expression (doesn't make sense, but legal syntax)
{
"node": cst.FormattedString(
start='f"',
parts=[
cst.FormattedStringExpression(
expression=cst.GeneratorExp(
elt=cst.Name(
value="x",
),
for_in=cst.CompFor(
target=cst.Name(
value="x",
),
iter=cst.Name(
value="y",
),
),
lpar=[],
rpar=[],
),
),
],
end='"',
),
"code": 'f"{x for x in y}"',
"parser": parse_expression,
"expected_position": None,
},
# Concatenated strings
{
"node": cst.ConcatenatedString(
cst.SimpleString('"ab"'), cst.SimpleString('"c"')
),
"code": '"ab""c"',
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.ConcatenatedString(
cst.SimpleString('"ab"'),
cst.ConcatenatedString(
cst.SimpleString('"c"'), cst.SimpleString('"d"')
),
),
"code": '"ab""c""d"',
"parser": parse_expression,
"expected_position": None,
},
# mixed SimpleString and FormattedString
{
"node": cst.ConcatenatedString(
cst.FormattedString([cst.FormattedStringText("ab")]),
cst.SimpleString('"c"'),
),
"code": 'f"ab""c"',
"parser": parse_expression,
"expected_position": None,
},
{
"node": cst.ConcatenatedString(
cst.SimpleString('"ab"'),
cst.FormattedString([cst.FormattedStringText("c")]),
),
"code": '"ab"f"c"',
"parser": parse_expression,
"expected_position": None,
},
# Concatenated parenthesized strings
{
"node": cst.ConcatenatedString(
lpar=(cst.LeftParen(),),
left=cst.SimpleString('"ab"'),
right=cst.SimpleString('"c"'),
rpar=(cst.RightParen(),),
),
"code": '("ab""c")',
"parser": parse_expression,
"expected_position": None,
},
# Validate spacing
{
"node": cst.ConcatenatedString(
lpar=(cst.LeftParen(whitespace_after=cst.SimpleWhitespace(" ")),),
left=cst.SimpleString('"ab"'),
whitespace_between=cst.SimpleWhitespace(" "),
right=cst.SimpleString('"c"'),
rpar=(cst.RightParen(whitespace_before=cst.SimpleWhitespace(" ")),),
),
"code": '( "ab" "c" )',
"parser": parse_expression,
"expected_position": CodeRange((1, 2), (1, 10)),
},
)
)
def test_valid(self, **kwargs: Any) -> None:
# We don't have sentinel nodes for atoms, so we know that 100% of atoms
# can be parsed identically to their creation.
self.validate_node(**kwargs)
@data_provider(
(
{
"node": cst.FormattedStringExpression(
cst.Name("today"),
format_spec=(cst.FormattedStringText("%B %d, %Y"),),
),
"code": "{today:%B %d, %Y}",
"parser": None,
"expected_position": CodeRange((1, 0), (1, 17)),
},
)
)
def test_valid_no_parse(self, **kwargs: Any) -> None:
# Test some nodes that aren't valid source code by themselves
self.validate_node(**kwargs)
@data_provider(
(
# Expression wrapping parenthesis rules
{
"get_node": (lambda: cst.Name("foo", lpar=(cst.LeftParen(),))),
"expected_re": "left paren without right paren",
},
{
"get_node": lambda: cst.Name("foo", rpar=(cst.RightParen(),)),
"expected_re": "right paren without left paren",
},
{
"get_node": lambda: cst.Ellipsis(lpar=(cst.LeftParen(),)),
"expected_re": "left paren without right paren",
},
{
"get_node": lambda: cst.Ellipsis(rpar=(cst.RightParen(),)),
"expected_re": "right paren without left paren",
},
{
"get_node": lambda: cst.Integer("5", lpar=(cst.LeftParen(),)),
"expected_re": "left paren without right paren",
},
{
"get_node": lambda: cst.Integer("5", rpar=(cst.RightParen(),)),
"expected_re": "right paren without left paren",
},
{
"get_node": lambda: cst.Float("5.5", lpar=(cst.LeftParen(),)),
"expected_re": "left paren without right paren",
},
{
"get_node": lambda: cst.Float("5.5", rpar=(cst.RightParen(),)),
"expected_re": "right paren without left paren",
},
{
"get_node": (lambda: cst.Imaginary("5j", lpar=(cst.LeftParen(),))),
"expected_re": "left paren without right paren",
},
{
"get_node": (lambda: cst.Imaginary("5j", rpar=(cst.RightParen(),))),
"expected_re": "right paren without left paren",
},
{
"get_node": (lambda: cst.Integer("5", lpar=(cst.LeftParen(),))),
"expected_re": "left paren without right paren",
},
{
"get_node": (lambda: cst.Integer("5", rpar=(cst.RightParen(),))),
"expected_re": "right paren without left paren",
},
{
"get_node": (
lambda: cst.SimpleString("'foo'", lpar=(cst.LeftParen(),))
),
"expected_re": "left paren without right paren",
},
{
"get_node": (
lambda: cst.SimpleString("'foo'", rpar=(cst.RightParen(),))
),
"expected_re": "right paren without left paren",
},
{
"get_node": (
lambda: cst.FormattedString(parts=(), lpar=(cst.LeftParen(),))
),
"expected_re": "left paren without right paren",
},
{
"get_node": (
lambda: cst.FormattedString(parts=(), rpar=(cst.RightParen(),))
),
"expected_re": "right paren without left paren",
},
{
"get_node": (
lambda: cst.ConcatenatedString(
cst.SimpleString("'foo'"),
cst.SimpleString("'foo'"),
lpar=(cst.LeftParen(),),
)
),
"expected_re": "left paren without right paren",
},
{
"get_node": (
lambda: cst.ConcatenatedString(
cst.SimpleString("'foo'"),
cst.SimpleString("'foo'"),
rpar=(cst.RightParen(),),
)
),
"expected_re": "right paren without left paren",
},
# Node-specific rules
{
"get_node": (lambda: cst.Name("")),
"expected_re": "empty name identifier",
},
{
"get_node": (lambda: cst.Name(r"\/")),
"expected_re": "not a valid identifier",
},
{
"get_node": (lambda: cst.Integer("")),
"expected_re": "not a valid integer",
},
{
"get_node": (lambda: cst.Integer("012345")),
"expected_re": "not a valid integer",
},
{
"get_node": (lambda: cst.Integer("012345")),
"expected_re": "not a valid integer",
},
{
"get_node": (lambda: cst.Integer("_12345")),
"expected_re": "not a valid integer",
},
{
"get_node": (lambda: cst.Integer("0b2")),
"expected_re": "not a valid integer",
},
{
"get_node": (lambda: cst.Integer("0o8")),
"expected_re": "not a valid integer",
},
{
"get_node": (lambda: cst.Integer("0xg")),
"expected_re": "not a valid integer",
},
{
"get_node": (lambda: cst.Integer("123.45")),
"expected_re": "not a valid integer",
},
{
"get_node": (lambda: cst.Integer("12345j")),
"expected_re": "not a valid integer",
},
{
"get_node": (lambda: cst.Float("12.3.45")),
"expected_re": "not a valid float",
},
{"get_node": (lambda: cst.Float("12")), "expected_re": "not a valid float"},
{
"get_node": (lambda: cst.Float("12.3j")),
"expected_re": "not a valid float",
},
{
"get_node": (lambda: cst.Imaginary("_12345j")),
"expected_re": "not a valid imaginary",
},
{
"get_node": (lambda: cst.Imaginary("0b0j")),
"expected_re": "not a valid imaginary",
},
{
"get_node": (lambda: cst.Imaginary("0o0j")),
"expected_re": "not a valid imaginary",
},
{
"get_node": (lambda: cst.Imaginary("0x0j")),
"expected_re": "not a valid imaginary",
},
{
"get_node": (lambda: cst.SimpleString('wee""')),
"expected_re": "Invalid string prefix",
},
{
"get_node": (lambda: cst.SimpleString("'")),
"expected_re": "must have enclosing quotes",
},
{
"get_node": (lambda: cst.SimpleString('"')),
"expected_re": "must have enclosing quotes",
},
{
"get_node": (lambda: cst.SimpleString("\"'")),
"expected_re": "must have matching enclosing quotes",
},
{
"get_node": (lambda: cst.SimpleString("")),
"expected_re": "must have enclosing quotes",
},
{
"get_node": (lambda: cst.SimpleString("'bla")),
"expected_re": "must have matching enclosing quotes",
},
{
"get_node": (lambda: cst.SimpleString("f''")),
"expected_re": "Invalid string prefix",
},
{
"get_node": (lambda: cst.SimpleString("'''bla''")),
"expected_re": "must have matching enclosing quotes",
},
{
"get_node": (lambda: cst.SimpleString("'''bla\"\"\"")),
"expected_re": "must have matching enclosing quotes",
},
{
"get_node": (lambda: cst.FormattedString(start="'", parts=(), end="'")),
"expected_re": "Invalid f-string prefix",
},
{
"get_node": (
lambda: cst.FormattedString(start="f'", parts=(), end='"')
),
"expected_re": "must have matching enclosing quotes",
},
{
"get_node": (
lambda: cst.ConcatenatedString(
cst.SimpleString(
'"ab"', lpar=(cst.LeftParen(),), rpar=(cst.RightParen(),)
),
cst.SimpleString('"c"'),
)
),
"expected_re": "Cannot concatenate parenthesized",
},
{
"get_node": (
lambda: cst.ConcatenatedString(
cst.SimpleString('"ab"'),
cst.SimpleString(
'"c"', lpar=(cst.LeftParen(),), rpar=(cst.RightParen(),)
),
)
),
"expected_re": "Cannot concatenate parenthesized",
},
{
"get_node": (
lambda: cst.ConcatenatedString(
cst.SimpleString('"ab"'), cst.SimpleString('b"c"')
)
),
"expected_re": "Cannot concatenate string and bytes",
},
# This isn't valid code: `"a" inb"abc"`
{
"get_node": (
lambda: cst.Comparison(
cst.SimpleString('"a"'),
[
cst.ComparisonTarget(
cst.In(whitespace_after=cst.SimpleWhitespace("")),
cst.SimpleString('b"abc"'),
)
],
)
),
"expected_re": "Must have at least one space around comparison operator.",
},
# Also not valid: `"a" in b"a"b"bc"`
{
"get_node": (
lambda: cst.Comparison(
cst.SimpleString('"a"'),
[
cst.ComparisonTarget(
cst.In(whitespace_after=cst.SimpleWhitespace("")),
cst.ConcatenatedString(
cst.SimpleString('b"a"'), cst.SimpleString('b"bc"')
),
)
],
)
),
"expected_re": "Must have at least one space around comparison operator.",
},
)
)
def test_invalid(self, **kwargs: Any) -> None:
self.assert_invalid(**kwargs)
@data_provider(
(
{
"code": "u'x'",
"parser": parse_expression_as(python_version="3.3"),
"expect_success": True,
},
{
"code": "u'x'",
"parser": parse_expression_as(python_version="3.1"),
"expect_success": False,
},
)
)
def test_versions(self, **kwargs: Any) -> None:
self.assert_parses(**kwargs)