import { assertEquals } from "../testing/asserts.ts";import { StringWriter } from "./writers.ts";import { StringReader } from "./readers.ts";import { copyN } from "./util.ts";import { copy } from "../streams/conversion.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 () { 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");});
Deno.test("ioStringWriterIsolationTest", async function () { const encoder = new TextEncoder(); const src = "ABC"; const srcChunks = src.split("").map((c) => encoder.encode(c));
const w = new StringWriter(); for (const c of srcChunks) { const written = await w.write(c); assertEquals(written, 1); } srcChunks[0][0] = 88; assertEquals(w.toString(), src);});