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std/streams/delimiter_test.ts

Deno standard library
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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
import { DelimiterStream, LineStream, TextDelimiterStream, TextLineStream,} from "./delimiter.ts";import { assert, assertEquals } from "../testing/asserts.ts";
Deno.test("[streams] LineStream", async () => { const textStream = new ReadableStream({ start(controller) { controller.enqueue("qwertzu"); controller.enqueue("iopasd\r\nmnbvc"); controller.enqueue("xylk\njhgfds\napoiuzt"); controller.enqueue("qwr09eiqwrjiowqr\r"); controller.enqueue("\nrewq0987654321"); controller.close(); }, });
const lines = textStream .pipeThrough(new TextEncoderStream()) .pipeThrough(new LineStream()) .pipeThrough(new TextDecoderStream()); const reader = lines.getReader();
const a = await reader.read(); assertEquals(a.value, "qwertzuiopasd"); const b = await reader.read(); assertEquals(b.value, "mnbvcxylk"); const c = await reader.read(); assertEquals(c.value, "jhgfds"); const d = await reader.read(); assertEquals(d.value, "apoiuztqwr09eiqwrjiowqr"); const e = await reader.read(); assertEquals(e.value, "rewq0987654321"); const f = await reader.read(); assert(f.done);});
Deno.test("[streams] TextLineStream", async () => { const textStream = new ReadableStream({ start(controller) { controller.enqueue("qwertzu"); controller.enqueue("iopasd\r\nmnbvc"); controller.enqueue("xylk\njhgfds\napoiuzt"); controller.enqueue("qwr09eiqwrjiowqr\r"); controller.enqueue("\nrewq0987\n\n654321"); controller.enqueue("\nrewq0987\r\n\r\n654321"); controller.close(); }, });
const lines = textStream.pipeThrough(new TextLineStream()); const reader = lines.getReader();
const a = await reader.read(); assertEquals(a.value, "qwertzuiopasd"); const b = await reader.read(); assertEquals(b.value, "mnbvcxylk"); const c = await reader.read(); assertEquals(c.value, "jhgfds"); const d = await reader.read(); assertEquals(d.value, "apoiuztqwr09eiqwrjiowqr"); const e = await reader.read(); assertEquals(e.value, "rewq0987"); const f = await reader.read(); assertEquals(f.value, ""); const g = await reader.read(); assertEquals(g.value, "654321"); const h = await reader.read(); assertEquals(h.value, "rewq0987"); const i = await reader.read(); assertEquals(i.value, ""); const j = await reader.read(); assertEquals(j.value, "654321"); const k = await reader.read(); assert(k.done);});
Deno.test("[streams] DelimiterStream", async () => { const textStream = new ReadableStream({ start(controller) { controller.enqueue("qwertzu"); controller.enqueue("iopasdfoomnbvc"); controller.enqueue("xylkjhfoogfdsapfoooiuzt"); controller.enqueue("rewq098765432fo"); controller.enqueue("o349012i491290"); controller.close(); }, });
const lines = textStream .pipeThrough(new TextEncoderStream()) .pipeThrough(new DelimiterStream(new TextEncoder().encode("foo"))) .pipeThrough(new TextDecoderStream()); const reader = lines.getReader();
const a = await reader.read(); assertEquals(a.value, "qwertzuiopasd"); const b = await reader.read(); assertEquals(b.value, "mnbvcxylkjh"); const c = await reader.read(); assertEquals(c.value, "gfdsap"); const d = await reader.read(); assertEquals(d.value, "oiuztrewq098765432"); const e = await reader.read(); assertEquals(e.value, "349012i491290"); const f = await reader.read(); assert(f.done);});
Deno.test("[streams] TextDelimiterStream", async () => { const textStream = new ReadableStream({ start(controller) { controller.enqueue("qwertzu"); controller.enqueue("iopasdfoomnbvc"); controller.enqueue("xylkjhfoogfdsapfoooiuzt"); controller.enqueue("rewq098765432fo"); controller.enqueue("o349012i491290"); controller.close(); }, });
const lines = textStream .pipeThrough(new TextDelimiterStream("foo")); const reader = lines.getReader();
const a = await reader.read(); assertEquals(a.value, "qwertzuiopasd"); const b = await reader.read(); assertEquals(b.value, "mnbvcxylkjh"); const c = await reader.read(); assertEquals(c.value, "gfdsap"); const d = await reader.read(); assertEquals(d.value, "oiuztrewq098765432"); const e = await reader.read(); assertEquals(e.value, "349012i491290"); const f = await reader.read(); assert(f.done);});