Use a ReadableStream rather than a resource for this test

cli/tests/unit/text_encoding_test.ts

@@ -1,5 +1,10 @@
 // Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
-import { assert, assertEquals, assertThrows } from "./test_util.ts";
+import {
+ assert,
+ assertEquals,
+ assertStrictEquals,
+ assertThrows,
+} from "./test_util.ts";
 
 Deno.test(function btoaSuccess() {
  const text = "hello world";
@@ -323,14 +328,20 @@ Deno.test(function binaryEncode() {
 Deno.test(
  {
  permissions: { read: true },
- // TODO(mmastrac): readableStreamForRid doesn't guarantee cancellation of ops, so we may be left with a
- // dangling read op that triggers the sanitizer.
- sanitizeOps: false,
  },
  async function textDecoderStreamCleansUpOnCancel() {
- const filename = "cli/tests/testdata/assets/hello.txt";
- const file = await Deno.open(filename);
- const readable = file.readable.pipeThrough(new TextDecoderStream());
+ let timeout: number | undefined = undefined;
+ const readable = new ReadableStream({
+ start: (controller) => {
+ controller.enqueue(new Uint8Array(12));
+ // This will never be called
+ timeout = setTimeout(() => controller.close());
+ },
+ cancel: () => {
+ clearTimeout(timeout);
+ timeout = undefined;
+ },
+ }).pipeThrough(new TextDecoderStream());
  const chunks = [];
  for await (const chunk of readable) {
  chunks.push(chunk);
@@ -339,5 +350,6 @@ Deno.test(
  }
  assertEquals(chunks.length, 1);
  assertEquals(chunks[0].length, 12);
+ assertStrictEquals(timeout, undefined);
  },
 );