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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
import { TextLineStream } from "./text_line_stream.ts";import { assertEquals } from "../assert/mod.ts";
Deno.test("[streams] TextLineStream", async () => {  const textStream = new ReadableStream({    start(controller) {      controller.enqueue("qwertzu");      controller.enqueue("iopasd\r\nmnbvc");      controller.enqueue("xylk\rjhgfds\napoiuzt\r");      controller.enqueue("qwr\r09ei\rqwrjiowqr\r");      controller.enqueue("\nrewq0987\n\n654321");      controller.enqueue("\nrewq0987\r\n\r\n654321\r");      controller.close();    },  });
  const lines = [];  for await (const chunk of textStream.pipeThrough(new TextLineStream())) {    lines.push(chunk);  }  assertEquals(lines, [    "qwertzuiopasd",    "mnbvcxylk\rjhgfds",    "apoiuzt\rqwr\r09ei\rqwrjiowqr",    "rewq0987",    "",    "654321",    "rewq0987",    "",    "654321\r",  ]);
  const textStream2 = new ReadableStream({    start(controller) {      controller.enqueue("rewq0987\r\n\r\n654321\n");      controller.close();    },  });
  const lines2 = [];  for await (const chunk of textStream2.pipeThrough(new TextLineStream())) {    lines2.push(chunk);  }  assertEquals(lines2, [    "rewq0987",    "",    "654321",  ]);});
Deno.test("[streams] TextLineStream - allowCR", async () => {  const textStream = new ReadableStream({    start(controller) {      controller.enqueue("qwertzu");      controller.enqueue("iopasd\r\nmnbvc");      controller.enqueue("xylk\rjhgfds\napoiuzt\r");      controller.enqueue("qwr\r09ei\rqwrjiowqr\r");      controller.enqueue("\nrewq0987\n\n654321");      controller.enqueue("\nrewq0987\r\n\r\n654321\r");      controller.close();    },  });
  const lines = [];  for await (    const chunk of textStream.pipeThrough(new TextLineStream({ allowCR: true }))  ) {    lines.push(chunk);  }  assertEquals(lines, [    "qwertzuiopasd",    "mnbvcxylk",    "jhgfds",    "apoiuzt",    "qwr",    "09ei",    "qwrjiowqr",    "rewq0987",    "",    "654321",    "rewq0987",    "",    "654321",  ]);
  const textStream2 = new ReadableStream({    start(controller) {      controller.enqueue("rewq0987\r\n\r\n654321\n");      controller.close();    },  });
  const lines2 = [];  for await (const chunk of textStream2.pipeThrough(new TextLineStream())) {    lines2.push(chunk);  }  assertEquals(lines2, [    "rewq0987",    "",    "654321",  ]);});
Deno.test("[streams] TextLineStream - large chunks", async () => {  const textStream = new ReadableStream({    start(controller) {      controller.enqueue("\n".repeat(10000));      controller.enqueue("\n".repeat(10000));      controller.close();    },  });
  let lines = 0;  for await (const chunk of textStream.pipeThrough(new TextLineStream())) {    assertEquals(chunk, "");    lines++;  }  assertEquals(lines, 20000);});
Deno.test(  "[streams] TextLineStream - no final empty chunk",  async (t) => {    await t.step("with terminal newline", async () => {      const inputChunks = [        "abc\n",        "def\nghi\njk",        "l\nmn",        "o\np",        "qr",        "\nstu\nvwx\n",        "yz\n",      ];
      const textLineStream = new ReadableStream<string>({        start(controller) {          for (const chunk of inputChunks) controller.enqueue(chunk);          controller.close();        },      }).pipeThrough(new TextLineStream());
      const lines = [];
      for await (const chunk of textLineStream) lines.push(chunk);
      assertEquals(lines, [        "abc",        "def",        "ghi",        "jkl",        "mno",        "pqr",        "stu",        "vwx",        "yz",      ]);    });
    await t.step("without terminal newline", async () => {      const inputChunks = [        "abc\n",        "def\nghi\njk",        "l\nmn",        "o\np",        "qr",        "\nstu\nvwx\n",        "yz",      ];
      const textLineStream = new ReadableStream<string>({        start(controller) {          for (const chunk of inputChunks) controller.enqueue(chunk);          controller.close();        },      }).pipeThrough(new TextLineStream());
      const lines = [];
      for await (const chunk of textLineStream) lines.push(chunk);
      assertEquals(lines, [        "abc",        "def",        "ghi",        "jkl",        "mno",        "pqr",        "stu",        "vwx",        "yz",      ]);    });  },);