node/test/parallel/test-fs-non-number-arguments-throw.js

'use strict';

const common = require('../common');
const assert = require('assert');
const fs = require('fs');
const path = require('path');
const tempFile = path.join(common.tmpDir, 'fs-non-number-arguments-throw');

common.refreshTmpDir();
fs.writeFileSync(tempFile, 'abc\ndef');

// a sanity check when using numbers instead of strings
const sanity = 'def';
const saneEmitter = fs.createReadStream(tempFile, { start: 4, end: 6 });

assert.throws(function() {
  fs.createReadStream(tempFile, { start: '4', end: 6 });
}, "start as string didn't throw an error for createReadStream");

assert.throws(function() {
  fs.createReadStream(tempFile, { start: 4, end: '6' });
}, "end as string didn't throw an error");

assert.throws(function() {
  fs.createWriteStream(tempFile, { start: '4' });
}, "start as string didn't throw an error for createWriteStream");

saneEmitter.on('data', function(data) {
  assert.strictEqual(sanity, data.toString('utf8'), 'read ' +
                     data.toString('utf8') + ' instead of ' + sanity);
});