import { assert_true } from "https://deno.land/x/denops_std@v4.1.4/function/vim/mod.ts";
When {actual} is not true an error message is added to |v:errors|, like with |assert_equal()|. Also see |assert-return|. A value is TRUE when it is a non-zero number. When {actual} is not a number the assert fails. When {msg} is omitted an error in the form "Expected True but got {actual}" is produced. Can also be used as a |method|: GetResult()->assert_true()