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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.import { assertEquals, assertThrows } from "../testing/asserts.ts";import * as log from "./mod.ts";import {  getLevelByName,  getLevelName,  LevelName,  LogLevelNames,} from "./levels.ts";
class TestHandler extends log.handlers.BaseHandler {  public messages: string[] = [];
  override log(msg: string) {    this.messages.push(msg);  }}
Deno.test("defaultHandlers", async function () {  const loggers: {    [key: string]: (msg: string, ...args: unknown[]) => void;  } = {    DEBUG: log.debug,    INFO: log.info,    WARNING: log.warning,    ERROR: log.error,    CRITICAL: log.critical,  };
  for (const levelName of LogLevelNames) {    if (levelName === "NOTSET") {      continue;    }
    const logger = loggers[levelName];    const handler = new TestHandler(levelName as LevelName);
    await log.setup({      handlers: {        default: handler,      },      loggers: {        default: {          level: levelName as LevelName,          handlers: ["default"],        },      },    });
    logger("foo");    logger("bar", 1, 2);
    assertEquals(handler.messages, [`${levelName} foo`, `${levelName} bar`]);  }});
Deno.test("getLogger", async function () {  const handler = new TestHandler("DEBUG");
  await log.setup({    handlers: {      default: handler,    },    loggers: {      default: {        level: "DEBUG",        handlers: ["default"],      },    },  });
  const logger = log.getLogger();
  assertEquals(logger.levelName, "DEBUG");  assertEquals(logger.handlers, [handler]);});
Deno.test("getLoggerWithName", async function () {  const fooHandler = new TestHandler("DEBUG");
  await log.setup({    handlers: {      foo: fooHandler,    },    loggers: {      bar: {        level: "INFO",        handlers: ["foo"],      },    },  });
  const logger = log.getLogger("bar");
  assertEquals(logger.levelName, "INFO");  assertEquals(logger.handlers, [fooHandler]);});
Deno.test("getLoggerUnknown", async function () {  await log.setup({    handlers: {},    loggers: {},  });
  const logger = log.getLogger("nonexistent");
  assertEquals(logger.levelName, "NOTSET");  assertEquals(logger.handlers, []);});
Deno.test("getInvalidLoggerLevels", function () {  assertThrows(() => getLevelByName("FAKE_LOG_LEVEL" as LevelName));  assertThrows(() => getLevelName(5000));});