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// Copyright 2018-2020 the oak authors. All rights reserved. MIT license.
import {  assert,  assertEquals,  BufWriter,  StringWriter,  test,} from "./test_deps.ts";
import { Application } from "./application.ts";import { ServerSentEvent, ServerSentEventTarget } from "./server_sent_event.ts";import { ServerRequest } from "./types.d.ts";
const preamble = `HTTP/1.1 200 OKconnection: Keep-Alivecontent-type: text/event-streamcache-control: no-cachekeep-alive: timeout=9007199254740991
`;
const env = {  appTarget: new EventTarget(),  appErrorEvents: [] as ErrorEvent[],  outWriter: new StringWriter(),  connCloseCalled: false,};
function createMockApp(): Application {  env.appTarget = new EventTarget();  env.appErrorEvents = [];  env.appTarget.addEventListener(    "error",    (evt) => {      env.appErrorEvents.push(evt as ErrorEvent);    },  );  return env.appTarget as any;}
function createMockServerRequest(): ServerRequest {  env.outWriter = new StringWriter();  env.connCloseCalled = false;  return {    conn: {      close() {        env.connCloseCalled = true;      },    },    w: new BufWriter(env.outWriter),  } as any;}
test({  name: "ServerSentEvent - construction",  fn() {    const evt = new ServerSentEvent("message", "foobar");    assertEquals(evt.type, "message");    assertEquals(evt.data, "foobar");    assertEquals(evt.id, undefined);    assertEquals(String(evt), `event: message\ndata: foobar\n\n`);  },});
test({  name: "ServerSentEvent - data coercion",  fn() {    const evt = new ServerSentEvent("ping", { hello: true });    assertEquals(evt.type, "ping");    assertEquals(evt.data, `{"hello":true}`);    assertEquals(evt.id, undefined);    assertEquals(String(evt), `event: ping\ndata: {"hello":true}\n\n`);  },});
test({  name: "ServerSentEvent - init id",  fn() {    const evt = new ServerSentEvent("ping", "foobar", { id: 1234 });    assertEquals(evt.type, "ping");    assertEquals(evt.data, `foobar`);    assertEquals(evt.id, 1234);    assertEquals(      String(evt),      `event: ping\nid: 1234\ndata: foobar\n\n`,    );  },});
test({  name: "ServerSentEvent - data space",  fn() {    const evt = new ServerSentEvent("ping", { hello: [1, 2, 3] }, { space: 2 });    assertEquals(evt.type, "ping");    assertEquals(evt.data, `{\n  "hello": [\n    1,\n    2,\n    3\n  ]\n}`);    assertEquals(      String(evt),      `event: ping\ndata: {\ndata:   "hello": [\ndata:     1,\ndata:     2,\ndata:     3\ndata:   ]\ndata: }\n\n`,    );  },});
test({  name: "ServerSentEvent - __message",  fn() {    const evt = new ServerSentEvent("__message", { hello: "world" });    assertEquals(evt.type, "__message");    assertEquals(evt.data, `{"hello":"world"}`);    assertEquals(String(evt), `data: {"hello":"world"}\n\n`);  },});
test({  name: "ServerSentEventTarget - construction",  async fn() {    const sse = new ServerSentEventTarget(      createMockApp(),      createMockServerRequest(),    );    assertEquals(sse.closed, false);    await sse.close();    assert(env.connCloseCalled);    assertEquals(sse.closed, true);    const actual = String(env.outWriter);    assertEquals(actual, preamble);    assertEquals(env.appErrorEvents.length, 0);  },});
test({  name: "ServerSentEventTaget - construction with headers",  async fn() {    const expected =      `HTTP/1.1 200 OK\nconnection: Keep-Alive\ncontent-type: text/event-stream\ncache-control: special\nkeep-alive: timeout=9007199254740991\nx-oak: test\n\n`;    const sse = new ServerSentEventTarget(      createMockApp(),      createMockServerRequest(),      {        headers: new Headers([["X-Oak", "test"], ["Cache-Control", "special"]]),      },    );    await sse.close();    const actual = String(env.outWriter);    assertEquals(actual, expected);  },});
test({  name: "ServerSentEventTarget - dispatchEvent",  async fn() {    const sse = new ServerSentEventTarget(      createMockApp(),      createMockServerRequest(),    );    const evt = new ServerSentEvent("message", "foobar");    sse.dispatchEvent(evt);    await sse.close();    assert(env.connCloseCalled);    const actual = env.outWriter.toString();    assert(actual.endsWith(`\n\nevent: message\ndata: foobar\n\n`));    assertEquals(env.appErrorEvents.length, 0);  },});
test({  name: "ServerSentEventTarget - dispatchMessage",  async fn() {    const sse = new ServerSentEventTarget(      createMockApp(),      createMockServerRequest(),    );    sse.dispatchMessage("foobar");    await sse.close();    assert(env.connCloseCalled);    const actual = env.outWriter.toString();    assert(actual.endsWith(`\n\ndata: foobar\n\n`));    assertEquals(env.appErrorEvents.length, 0);  },});
test({  name: "ServerSentEventTarget - dispatchComment",  async fn() {    const sse = new ServerSentEventTarget(      createMockApp(),      createMockServerRequest(),    );    sse.dispatchComment("foobar");    await sse.close();    assert(env.connCloseCalled);    const actual = env.outWriter.toString();    assert(actual.endsWith(`\n\n: foobar\n\n`));    assertEquals(env.appErrorEvents.length, 0);  },});