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'use strict';
const common = require('../common');
const fixtures = require('../common/fixtures');
const fs = require('fs');
const assert = require('assert');
const filepath = fixtures.path('x.txt');
const expected = Buffer.from('xyz\n');
const defaultBufferAsync = Buffer.alloc(16384);
const bufferAsOption = Buffer.allocUnsafe(expected.byteLength);
function testValid(message, ...options) {
const paramsMsg = `${message} (as params)`;
const paramsFilehandle = fs.openSync(filepath, 'r');
fs.read(paramsFilehandle, ...options, common.mustSucceed((bytesRead, buffer) => {
assert.strictEqual(bytesRead, expected.byteLength, paramsMsg);
assert.deepStrictEqual(defaultBufferAsync.byteLength, buffer.byteLength, paramsMsg);
fs.closeSync(paramsFilehandle);
}));
const optionsMsg = `${message} (as options)`;
const optionsFilehandle = fs.openSync(filepath, 'r');
fs.read(optionsFilehandle, bufferAsOption, ...options, common.mustSucceed((bytesRead, buffer) => {
assert.strictEqual(bytesRead, expected.byteLength, optionsMsg);
assert.deepStrictEqual(bufferAsOption.byteLength, buffer.byteLength, optionsMsg);
fs.closeSync(optionsFilehandle);
}));
}
testValid('Not passing in any object');
testValid('Passing in a null', null);
testValid('Passing in an empty object', common.mustNotMutateObjectDeep({}));
testValid('Passing in an object', common.mustNotMutateObjectDeep({
offset: 0,
length: bufferAsOption.byteLength,
position: 0,
}));
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