test_helpers.yml

-   case: mark_safe_decorator_and_function
    main: |
        from django.utils.safestring import mark_safe
        s = 'hello'
        reveal_type(mark_safe(s))  # N: Revealed type is "django.utils.safestring.SafeString"
        reveal_type(mark_safe(s) + mark_safe(s))  # N: Revealed type is "django.utils.safestring.SafeString"
        reveal_type(s + mark_safe(s))  # N: Revealed type is "builtins.str"

        s += mark_safe(s)
        reveal_type(s)  # N: Revealed type is "builtins.str"
        ms = mark_safe(s)
        ms += mark_safe(s)
        reveal_type(ms)  # N: Revealed type is "django.utils.safestring.SafeString"

        @mark_safe
        def func(s: str) -> str:
            pass
        reveal_type(func)  # N: Revealed type is "def (s: builtins.str) -> builtins.str"