Node.js assert.CallTracker tracker.report()用法及代碼示例

tracker.report()

• 返回： <Array> 個對象，包含有關由 tracker.calls() 返回的包裝函數的信息。
• 對象<Object>
  • message <string>
  • actual <number> 調用函數的實際次數。
  • expected <number> 函數預期被調用的次數。
  • operator <string> 被包裝的函數的名稱。
  • stack <Object> 函數的堆棧跟蹤。

數組包含有關未調用預期次數的函數的預期和實際調用次數的信息。

import assert from 'node:assert';

// Creates call tracker.
const tracker = new assert.CallTracker();

function func() {}

function foo() {}

// Returns a function that wraps func() that must be called exact times
// before tracker.verify().
const callsfunc = tracker.calls(func, 2);

// Returns an array containing information on callsfunc()
tracker.report();
// [
//  {
//    message: 'Expected the func function to be executed 2 time(s) but was
//    executed 0 time(s).',
//    actual: 0,
//    expected: 2,
//    operator: 'func',
//    stack: stack trace
//  }
// ]const assert = require('node:assert');

// Creates call tracker.
const tracker = new assert.CallTracker();

function func() {}

function foo() {}

// Returns a function that wraps func() that must be called exact times
// before tracker.verify().
const callsfunc = tracker.calls(func, 2);

// Returns an array containing information on callsfunc()
tracker.report();
// [
//  {
//    message: 'Expected the func function to be executed 2 time(s) but was
//    executed 0 time(s).',
//    actual: 0,
//    expected: 2,
//    operator: 'func',
//    stack: stack trace
//  }
// ]