克隆的node.js项目在日志中出现了一个奇怪的错误

Question

Git模块https://github.com/eugenioclrc/agar.io-clone

> gulp run

[14:50:54] Using gulpfile C:\....\gulpfile.js
[14:50:54] Starting 'lint'...
[14:50:54] Starting 'move-client'...
[14:50:57] Finished 'move-client' after 2.84 s
[14:50:57] Finished 'lint' after 2.88 s
[14:50:57] Starting 'build-client'...
[14:50:57] Starting 'build-server'...
[14:50:57] Starting 'test'...
[14:50:57] Finished 'test' after 2.21 ms


  util.js
    #massToRadius
      V should return non-zero radius on zero input
      V should convert masses to a circle radius
[14:50:58] Finished 'build-server' after 848 ms
    #validNick
      V should allow empty player nicknames
      V should allow ascii character nicknames
      V should disallow unicode-dependent alphabets
      V should disallow spaces in nicknames
    #log
      1) should compute the log_{base} of a number
    #getDistance
      V should return a positive number


  7 passing (390ms)
  1 failing

  1) util.js #log should compute the log_{base} of a number:

      AssertionError: expected 2.0000000000000004 to deeply equal 2
      + expected - actual

      -2.0000000000000004
      +2

Answer 1

问题是您的节点版本，我认为。

创建这样的文件

// log-check.js
// from https://github.com/eugenioclrc/agar.io-clone/blob/master/src/server/lib/util.js 
function multibaselog(n, base) {
  return Math.log(n) / (base ? Math.log(base) : 1);
}

const log93 = multibaselog(9,3)
console.log(log93)
console.log(log93 === 2);

然后用节点4尝试它。

$ nvm use 4
$ node log-check.js 
2
true

(工程)

然后在节点8中进行尝试。

$ nvm use 8
$ node log-check.js 
2.0000000000000004
false

(否)

如果您切换到较早版本的节点，我认为此测试将通过。