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'use strict';
const common = require('../common');
const assert = require('assert');
const fs = require('fs');
const cbTypeError = /^TypeError: "callback" argument must be a function$/;
const callbackThrowValues = [null, true, false, 0, 1, 'foo', /foo/, [], {}];
const warn = 'Calling an asynchronous function without callback is deprecated.';
function testMakeStatsCallback(cb) {
return function() {
// fs.stat() calls makeStatsCallback() on its second argument
fs.stat(__filename, cb);
};
}
common.expectWarning('DeprecationWarning', warn);
// Verify the case where a callback function is provided
assert.doesNotThrow(testMakeStatsCallback(common.noop));
// Passing undefined/nothing calls rethrow() internally, which emits a warning
assert.doesNotThrow(testMakeStatsCallback());
function invalidCallbackThrowsTests() {
callbackThrowValues.forEach((value) => {
assert.throws(testMakeStatsCallback(value), cbTypeError);
});
}
invalidCallbackThrowsTests();