string.base_string_to_int(10, "123", 123).
string.base_string_to_int(10, "+123", 123).
string.base_string_to_int(10, "-123", -123).
string.base_string_to_int(10, "", _) failed.
string.base_string_to_int(10, "+", _) failed.
string.base_string_to_int(10, "-", _) failed.
string.base_string_to_int(10, "123abc", _) failed.
string.base_string_to_int(10, "abc", _) failed.
string.base_string_to_int(10, "+abc", _) failed.
string.base_string_to_int(10, "-abc", _) failed.
string.base_string_to_int(10, "Σ", _) failed.
string.base_string_to_int(10, "-Σ", _) failed.
string.base_string_to_int(10, "+Σ", _) failed.
string.base_string_to_int(10, "123Σ", _) failed.
min_int ok.