nodejs/test/parallel/test-assert-calltracker-calls.js

'use strict';
require('../common');
const assert = require('assert');

// This test ensures that assert.CallTracker.calls() works as intended.

const tracker = new assert.CallTracker();

function bar() {}

const err = {
  code: 'ERR_INVALID_ARG_TYPE',
};

// Ensures calls() throws on invalid input types.
assert.throws(() => {
  const callsbar = tracker.calls(bar, '1');
  callsbar();
}, err
);

assert.throws(() => {
  const callsbar = tracker.calls(bar, 0.1);
  callsbar();
}, { code: 'ERR_OUT_OF_RANGE' }
);

assert.throws(() => {
  const callsbar = tracker.calls(bar, true);
  callsbar();
}, err
);

assert.throws(() => {
  const callsbar = tracker.calls(bar, () => {});
  callsbar();
}, err
);

assert.throws(() => {
  const callsbar = tracker.calls(bar, null);
  callsbar();
}, err
);

// Expects an error as tracker.calls() cannot be called within a process exit
// handler.
process.on('exit', () => {
  assert.throws(() => tracker.calls(bar, 1), {
    code: 'ERR_UNAVAILABLE_DURING_EXIT',
  });
});

const msg = 'Expected to throw';

function func() {
  throw new Error(msg);
}

const callsfunc = tracker.calls(func, 1);

// Expects callsfunc() to call func() which throws an error.
assert.throws(
  () => callsfunc(),
  { message: msg }
);