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// Copyright 2019-2020 Yusuke Sakurai. All rights reserved. MIT license.import {  MultipartWriter,} from "./vendor/https/deno.land/std/mime/multipart.ts";import {  assert,  assertEquals,  assertThrowsAsync,} from "./vendor/https/deno.land/std/testing/asserts.ts";import { createBodyParser, parserMultipartRequest } from "./body_parser.ts";import { exists as fsExists } from "./vendor/https/deno.land/std/fs/exists.ts";import { Buffer } from "./vendor/https/deno.land/std/io/buffer.ts";import { group } from "./_test_util.ts";import { StringReader } from "./vendor/https/deno.land/std/io/readers.ts";
group("multipart", ({ test }) => {  test("basic", async () => {    const buf = new Buffer();    const w = new MultipartWriter(buf);    await w.writeField("deno", "land");    const f = await Deno.open("./README.md");    await w.writeFile("file", "README.md", f);    await w.close();    f.close();    const m = await parserMultipartRequest(      {        headers: new Headers({          "content-type": w.formDataContentType(),        }),        body: buf,      },      1000,    );    assertEquals(m.value("hoge"), undefined);    assertEquals(m.value("deno"), "land");    const mfile = m.file("file")!;    assert(!Array.isArray(mfile));    assertEquals(mfile.filename, "README.md");    assert(mfile.tempfile !== undefined, "temp file should be created");    await m.removeAll();    assertEquals(await fsExists(mfile.tempfile!), false);  });  test("should throw if content-type is invalid", async () => {    const body = new Buffer();    await assertThrowsAsync(      async () => {        await parserMultipartRequest({          headers: new Headers(),          body,        });      },      Error,      "is not multipart",    );    await assertThrowsAsync(      async () => {        await parserMultipartRequest({          headers: new Headers({            "content-type": "application/json",          }),          body,        });      },      Error,      "is not multipart",    );    await assertThrowsAsync(      async () => {        await parserMultipartRequest({          headers: new Headers({            "content-type": "multipart/form-data; ",          }),          body,        });      },      Error,      "doesn't have boundary",    );  });});
group("bodyParser", ({ test }) => {  test("text()", async () => {    const s = "denoland";    const r = new StringReader(s);    const br = createBodyParser({      reader: r,      contentType: "text/plain",    });    assertEquals(await br.text(), s);  });  test("text() should return empty string if body is empty", async () => {    const s = "";    const r = new StringReader(s);    const br = createBodyParser({ reader: r, contentType: "text/plain" });    assertEquals(await br.text(), "");    assertEquals(await br.text(), "");  });  test("json()", async () => {    const j = { deno: "land" };    const s = JSON.stringify(j);    const r = new StringReader(s);    const br = createBodyParser({ reader: r, contentType: "application/json" });    assertEquals(await br.json(), j);    assertEquals(await br.json(), j);  });  test("json() should throw if input is invalid", async () => {    const j = `{ deno: "land" `;    const r = new StringReader(j);    const br = createBodyParser({ reader: r, contentType: "application/json" });    await assertThrowsAsync(      async () => {        await br.json();      },      SyntaxError,      "JSON",    );  });  test("arrayBuffer()", async () => {    const bin = new Buffer(new Uint8Array([0, 1, 2, 3]));    const br = createBodyParser(      { reader: bin, contentType: "application/octet-stream" },    );    assertEquals([...(await br.arrayBuffer()).values()], [0, 1, 2, 3]);    assertEquals([...(await br.arrayBuffer()).values()], [0, 1, 2, 3]);  });  test("formData(), urlencoded", async () => {    const s = "deno=land&での=らんど&👉=🦕";    const e = encodeURIComponent(s);    const r = new StringReader(e);    const br = createBodyParser(      { reader: r, contentType: "application/x-www-form-urlencoded" },    );    const f = await br.formData();    assertEquals(f.value("deno"), "land");    assertEquals(f.value("での"), "らんど");    assertEquals(f.value("👉"), "🦕");  });  test("formData() should throw if invalid content type", async () => {    const br = createBodyParser(      { reader: new StringReader("deno=land"), contentType: "text/plain" },    );    await assertThrowsAsync(      async () => {        await br.formData();      },      Error,      "request is not multipart/form-data nor application/x-www-form-urlencoded",    );  });  test("multi transforming", async () => {    const s = `{"deno": "land"}`;    const encoder = new TextEncoder();    const br = createBodyParser(      { reader: new StringReader(s), contentType: "text/plain" },    );    assertEquals(await br.arrayBuffer(), encoder.encode(s));    assertEquals(await br.text(), s);    assertEquals(await br.json(), JSON.parse(s));  });});