[red-knot] Migrate bool/str/repr unit tests to Markdown tests (#15534)

## Summary

Part of #15397.

## Test Plan

Markdown tests.

crates/red_knot_python_semantic/resources/mdtest/annotations/literal_string.md

@@ -100,7 +100,7 @@ def _(flag: bool):
     foo_3: LiteralString = "foo" * 1_000_000_000
     bar_3: str = foo_2  # fine
 
-    baz_1: str = str()
+    baz_1: str = repr(object())
     qux_1: LiteralString = baz_1  # error: [invalid-assignment]
 
     baz_2: LiteralString = "baz" * 1_000_000_000

crates/red_knot_python_semantic/resources/mdtest/literal/f_string.md

@@ -3,17 +3,16 @@
 ## Expression
 
 ```py
-x = 0
+from typing_extensions import Literal
-y = str()
-z = False
 
-reveal_type(f"hello")  # revealed: Literal["hello"]
+def _(x: Literal[0], y: str, z: Literal[False]):
-reveal_type(f"h {x}")  # revealed: Literal["h 0"]
+    reveal_type(f"hello")  # revealed: Literal["hello"]
-reveal_type("one " f"single " f"literal")  # revealed: Literal["one single literal"]
+    reveal_type(f"h {x}")  # revealed: Literal["h 0"]
-reveal_type("first " f"second({x})" f" third")  # revealed: Literal["first second(0) third"]
+    reveal_type("one " f"single " f"literal")  # revealed: Literal["one single literal"]
-reveal_type(f"-{y}-")  # revealed: str
+    reveal_type("first " f"second({x})" f" third")  # revealed: Literal["first second(0) third"]
-reveal_type(f"-{y}-" f"--" "--")  # revealed: str
+    reveal_type(f"-{y}-")  # revealed: str
-reveal_type(f"{z} == {False} is {True}")  # revealed: Literal["False == False is True"]
+    reveal_type(f"-{y}-" f"--" "--")  # revealed: str
+    reveal_type(f"{z} == {False} is {True}")  # revealed: Literal["False == False is True"]
 ```
 
 ## Conversion Flags

crates/red_knot_python_semantic/resources/mdtest/type_properties/str_repr.md

@@ -0,0 +1,27 @@
+# `__str__` and `__repr__`
+
+```py
+from typing_extensions import Literal, LiteralString
+
+def _(
+    a: Literal[1],
+    b: Literal[True],
+    c: Literal[False],
+    d: Literal["ab'cd"],
+    e: LiteralString,
+    f: int,
+):
+    reveal_type(str(a))  # revealed: Literal["1"]
+    reveal_type(str(b))  # revealed: Literal["True"]
+    reveal_type(str(c))  # revealed: Literal["False"]
+    reveal_type(str(d))  # revealed: Literal["ab'cd"]
+    reveal_type(str(e))  # revealed: LiteralString
+    reveal_type(str(f))  # revealed: str
+
+    reveal_type(repr(a))  # revealed: Literal["1"]
+    reveal_type(repr(b))  # revealed: Literal["True"]
+    reveal_type(repr(c))  # revealed: Literal["False"]
+    reveal_type(repr(d))  # revealed: Literal["'ab\\'cd'"]
+    reveal_type(repr(e))  # revealed: LiteralString
+    reveal_type(repr(f))  # revealed: str
+```

crates/red_knot_python_semantic/resources/mdtest/type_properties/truthiness.md

@@ -0,0 +1,47 @@
+# Truthiness
+
+```py
+from typing_extensions import Literal, LiteralString
+from knot_extensions import AlwaysFalsy, AlwaysTruthy
+
+def _(
+    a: Literal[1],
+    b: Literal[-1],
+    c: Literal["foo"],
+    d: tuple[Literal[0]],
+    e: Literal[1, 2],
+    f: AlwaysTruthy,
+):
+    reveal_type(bool(a))  # revealed: Literal[True]
+    reveal_type(bool(b))  # revealed: Literal[True]
+    reveal_type(bool(c))  # revealed: Literal[True]
+    reveal_type(bool(d))  # revealed: Literal[True]
+    reveal_type(bool(e))  # revealed: Literal[True]
+    reveal_type(bool(f))  # revealed: Literal[True]
+
+def _(
+    a: tuple[()],
+    b: Literal[0],
+    c: Literal[""],
+    d: Literal[b""],
+    e: Literal[0, 0],
+    f: AlwaysFalsy,
+):
+    reveal_type(bool(a))  # revealed: Literal[False]
+    reveal_type(bool(b))  # revealed: Literal[False]
+    reveal_type(bool(c))  # revealed: Literal[False]
+    reveal_type(bool(d))  # revealed: Literal[False]
+    reveal_type(bool(e))  # revealed: Literal[False]
+    reveal_type(bool(f))  # revealed: Literal[False]
+
+def _(
+    a: str,
+    b: Literal[1, 0],
+    c: str | Literal[0],
+    d: str | Literal[1],
+):
+    reveal_type(bool(a))  # revealed: bool
+    reveal_type(bool(b))  # revealed: bool
+    reveal_type(bool(c))  # revealed: bool
+    reveal_type(bool(d))  # revealed: bool
+```

crates/red_knot_python_semantic/src/types.rs

@@ -2013,6 +2013,14 @@ impl<'db> Type<'db> {
                         CallOutcome::callable(binding)
                     }
 
+                    Some(KnownFunction::Repr) => {
+                        if let Some(first_arg) = binding.one_parameter_ty() {
+                            binding.set_return_ty(first_arg.repr(db));
+                        };
+
+                        CallOutcome::callable(binding)
+                    }
+
                     Some(KnownFunction::AssertType) => {
                         let Some((_, asserted_ty)) = binding.two_parameter_tys() else {
                             return CallOutcome::callable(binding);
@@ -2050,6 +2058,12 @@ impl<'db> Type<'db> {
                         .first_argument()
                         .map(|arg| arg.bool(db).into_type(db))
                         .unwrap_or(Type::BooleanLiteral(false)),
+
+                    Some(KnownClass::Str) => arguments
+                        .first_argument()
+                        .map(|arg| arg.str(db))
+                        .unwrap_or(Type::string_literal(db, "")),
+
                     _ => Type::Instance(InstanceType { class }),
                 }))
             }
@@ -3389,6 +3403,8 @@ pub enum KnownFunction {
     RevealType,
     /// `builtins.len`
     Len,
+    /// `builtins.repr`
+    Repr,
     /// `typing(_extensions).final`
     Final,
 
@@ -3436,6 +3452,7 @@ impl KnownFunction {
             "issubclass" => Self::ConstraintFunction(KnownConstraintFunction::IsSubclass),
             "reveal_type" => Self::RevealType,
             "len" => Self::Len,
+            "repr" => Self::Repr,
             "final" => Self::Final,
             "no_type_check" => Self::NoTypeCheck,
             "assert_type" => Self::AssertType,
@@ -3464,7 +3481,7 @@ impl KnownFunction {
                     module.is_builtins()
                 }
             },
-            Self::Len => module.is_builtins(),
+            Self::Len | Self::Repr => module.is_builtins(),
             Self::AssertType | Self::Cast | Self::RevealType | Self::Final | Self::NoTypeCheck => {
                 matches!(module, KnownModule::Typing | KnownModule::TypingExtensions)
             }
@@ -3496,6 +3513,7 @@ impl KnownFunction {
 
             Self::ConstraintFunction(_)
             | Self::Len
+            | Self::Repr
             | Self::Final
             | Self::NoTypeCheck
             | Self::RevealType
@@ -4625,58 +4643,6 @@ pub(crate) mod tests {
         assert!(!b.is_gradual_equivalent_to(&db, a));
     }
 
-    #[test_case(Ty::IntLiteral(1); "is_int_literal_truthy")]
-    #[test_case(Ty::IntLiteral(-1))]
-    #[test_case(Ty::StringLiteral("foo"))]
-    #[test_case(Ty::Tuple(vec![Ty::IntLiteral(0)]))]
-    #[test_case(Ty::Union(vec![Ty::IntLiteral(1), Ty::IntLiteral(2)]))]
-    fn is_truthy(ty: Ty) {
-        let db = setup_db();
-        assert_eq!(ty.into_type(&db).bool(&db), Truthiness::AlwaysTrue);
-    }
-
-    #[test_case(Ty::Tuple(vec![]))]
-    #[test_case(Ty::IntLiteral(0))]
-    #[test_case(Ty::StringLiteral(""))]
-    #[test_case(Ty::Union(vec![Ty::IntLiteral(0), Ty::IntLiteral(0)]))]
-    fn is_falsy(ty: Ty) {
-        let db = setup_db();
-        assert_eq!(ty.into_type(&db).bool(&db), Truthiness::AlwaysFalse);
-    }
-
-    #[test_case(Ty::BuiltinInstance("str"))]
-    #[test_case(Ty::Union(vec![Ty::IntLiteral(1), Ty::IntLiteral(0)]))]
-    #[test_case(Ty::Union(vec![Ty::BuiltinInstance("str"), Ty::IntLiteral(0)]))]
-    #[test_case(Ty::Union(vec![Ty::BuiltinInstance("str"), Ty::IntLiteral(1)]))]
-    fn boolean_value_is_unknown(ty: Ty) {
-        let db = setup_db();
-        assert_eq!(ty.into_type(&db).bool(&db), Truthiness::Ambiguous);
-    }
-
-    #[test_case(Ty::IntLiteral(1), Ty::StringLiteral("1"))]
-    #[test_case(Ty::BooleanLiteral(true), Ty::StringLiteral("True"))]
-    #[test_case(Ty::BooleanLiteral(false), Ty::StringLiteral("False"))]
-    #[test_case(Ty::StringLiteral("ab'cd"), Ty::StringLiteral("ab'cd"))] // no quotes
-    #[test_case(Ty::LiteralString, Ty::LiteralString)]
-    #[test_case(Ty::BuiltinInstance("int"), Ty::BuiltinInstance("str"))]
-    fn has_correct_str(ty: Ty, expected: Ty) {
-        let db = setup_db();
-
-        assert_eq!(ty.into_type(&db).str(&db), expected.into_type(&db));
-    }
-
-    #[test_case(Ty::IntLiteral(1), Ty::StringLiteral("1"))]
-    #[test_case(Ty::BooleanLiteral(true), Ty::StringLiteral("True"))]
-    #[test_case(Ty::BooleanLiteral(false), Ty::StringLiteral("False"))]
-    #[test_case(Ty::StringLiteral("ab'cd"), Ty::StringLiteral("'ab\\'cd'"))] // single quotes
-    #[test_case(Ty::LiteralString, Ty::LiteralString)]
-    #[test_case(Ty::BuiltinInstance("int"), Ty::BuiltinInstance("str"))]
-    fn has_correct_repr(ty: Ty, expected: Ty) {
-        let db = setup_db();
-
-        assert_eq!(ty.into_type(&db).repr(&db), expected.into_type(&db));
-    }
-
     #[test]
     fn typing_vs_typeshed_no_default() {
         let db = TestDbBuilder::new()

crates/red_knot_vendored/knot_extensions/knot_extensions.pyi

@@ -18,7 +18,7 @@ TypeOf: _SpecialForm
 # Ideally, these would be annotated using `TypeForm`, but that has not been
 # standardized yet (https://peps.python.org/pep-0747).
 def is_equivalent_to(type_a: Any, type_b: Any) -> bool: ...
-def is_subtype_of(type_derived: Any, typ_ebase: Any) -> bool: ...
+def is_subtype_of(type_derived: Any, type_base: Any) -> bool: ...
 def is_assignable_to(type_target: Any, type_source: Any) -> bool: ...
 def is_disjoint_from(type_a: Any, type_b: Any) -> bool: ...
 def is_fully_static(type: Any) -> bool: ...