ruff/crates/red_knot_python_semantic/resources/mdtest/comparison/strings.md

Comparison: Strings

String literals

def str_instance() -> str: ...

reveal_type("abc" == "abc")  # revealed: Literal[True]
reveal_type("ab_cd" <= "ab_ce")  # revealed: Literal[True]
reveal_type("abc" in "ab cd")  # revealed: Literal[False]
reveal_type("" not in "hello")  # revealed: Literal[False]
reveal_type("--" is "--")  # revealed: bool
reveal_type("A" is "B")  # revealed: Literal[False]
reveal_type("--" is not "--")  # revealed: bool
reveal_type("A" is not "B")  # revealed: Literal[True]
reveal_type(str_instance() < "...")  # revealed: bool

# ensure we're not comparing the interned salsa symbols, which compare by order of declaration.
reveal_type("ab" < "ab_cd")  # revealed: Literal[True]