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This patch issues a deprecation warning, if an asynchronous function is called without a callback function. PR-URL: https://github.com/nodejs/node/pull/7897 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Yorkie Liu <yorkiefixer@gmail.com> Reviewed-By: Anna Henningsen <anna@addaleax.net>
39 lines
960 B
JavaScript
39 lines
960 B
JavaScript
'use strict';
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const common = require('../common');
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const assert = require('assert');
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const fs = require('fs');
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function test(cb) {
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return function() {
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// fs.stat() calls makeCallback() on its second argument
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fs.stat(__filename, cb);
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};
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}
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// Verify the case where a callback function is provided
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assert.doesNotThrow(test(function() {}));
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process.once('warning', common.mustCall((warning) => {
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assert.strictEqual(
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warning.message,
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'Calling an asynchronous function without callback is deprecated.'
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);
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invalidArgumentsTests();
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}));
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// Passing undefined/nothing calls rethrow() internally, which emits a warning
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assert.doesNotThrow(test());
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function invalidArgumentsTests() {
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assert.throws(test(null));
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assert.throws(test(true));
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assert.throws(test(false));
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assert.throws(test(1));
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assert.throws(test(0));
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assert.throws(test('foo'));
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assert.throws(test(/foo/));
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assert.throws(test([]));
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assert.throws(test({}));
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}
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