function testing.assertimport { testing } from "https://deno.land/x/denoexec@v1.1.5/deps.ts"; const { assert } = testing; assert(expr: unknown, msg?): asserts exprMake an assertion, error will be thrown if expr does not have truthy value. Parametersexpr: unknownoptionalmsg = [UNSUPPORTED]Returnsasserts expr