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@std/assert@0.224.0
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denoland/std
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This package works with Cloudflare Workers, Node.js, Deno, Bun, Browsers
This package works with Cloudflare Workers
This package works with Node.js
This package works with Deno
This package works with Bun
This package works with Browsers
•JSR Score100%•
Downloads60,953/wk
•
Published2 years ago (0.224.0)

Common assertion functions, especially useful for testing

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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
import { assert, AssertionError, unreachable } from "./mod.ts";

Deno.test("AssertsUnreachable", function () {
  let didThrow = false;
  try {
    unreachable();
  } catch (e) {
    assert(e instanceof AssertionError);
    assert(e.message === "unreachable");
    didThrow = true;
  }
  assert(didThrow);
});

Deno.test("unreachable with reason", function () {
  let didThrow = false;
  try {
    unreachable("inconceivable!");
  } catch (e) {
    assert(e instanceof AssertionError);
    assert(e.message === "inconceivable!");
    didThrow = true;
  }
  assert(didThrow);
});