Rename Red Knot (#17820)

crates/ty_python_semantic/resources/mdtest/conditional/if_expression.md

@@ -0,0 +1,47 @@
+# If expressions
+
+## Simple if-expression
+
+```py
+def _(flag: bool):
+    x = 1 if flag else 2
+    reveal_type(x)  # revealed: Literal[1, 2]
+```
+
+## If-expression with walrus operator
+
+```py
+def _(flag: bool):
+    y = 0
+    z = 0
+    x = (y := 1) if flag else (z := 2)
+    reveal_type(x)  # revealed: Literal[1, 2]
+    reveal_type(y)  # revealed: Literal[0, 1]
+    reveal_type(z)  # revealed: Literal[0, 2]
+```
+
+## Nested if-expression
+
+```py
+def _(flag: bool, flag2: bool):
+    x = 1 if flag else 2 if flag2 else 3
+    reveal_type(x)  # revealed: Literal[1, 2, 3]
+```
+
+## None
+
+```py
+def _(flag: bool):
+    x = 1 if flag else None
+    reveal_type(x)  # revealed: Literal[1] | None
+```
+
+## Condition with object that implements `__bool__` incorrectly
+
+```py
+class NotBoolable:
+    __bool__: int = 3
+
+# error: [unsupported-bool-conversion] "Boolean conversion is unsupported for type `NotBoolable`"
+3 if NotBoolable() else 4
+```