Assert a std::fs::read_to_string() is a match to a regex.
use regex::Regex; let path = "alfa.txt"; let matcher = Regex::new(r"alfa").unwrap(); assert_fs_read_to_string_matches!(&path, matcher);
assert_fs_read_to_string_matches
assert_fs_read_to_string_matches_as_result
debug_assert_fs_read_to_string_matches