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std/io/writers_test.ts

Deno standard library
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// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.import { assertEquals } from "../testing/asserts.ts";import { StringWriter } from "./writers.ts";import { StringReader } from "./readers.ts";import { copyN } from "./ioutil.ts";import { copy } from "./util.ts";
Deno.test("ioStringWriter", async function () { const w = new StringWriter("base"); const r = new StringReader("0123456789"); await copyN(r, w, 4); assertEquals(w.toString(), "base0123"); await copy(r, w); assertEquals(w.toString(), "base0123456789");});
Deno.test("ioStringWriterSync", function (): void { const encoder = new TextEncoder(); const w = new StringWriter(""); w.writeSync(encoder.encode("deno")); assertEquals(w.toString(), "deno"); w.writeSync(encoder.encode("\nland")); assertEquals(w.toString(), "deno\nland");});