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Node v14.2.0(현재 버전) 

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const assert = require('assert');

const tracker = new assert.CallTracker();

function func() {}
const callsfunc = tracker.calls(func);

console.log(tracker.report());
/*
[
  {
    message: 'Expected the func function to be executed 1 time(s) but was executed 0 time(s).',
    actual: 0,
    expected: 1,
    operator: 'func',
    stack: Error
        ...
  }
]
*/

ConorDavenport가 기여하였습니다.#31982.