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node/test/parallel/test-net-internal.js

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'use strict';
// Flags: --expose-internals
require('../common');
const assert = require('assert');
const net = require('internal/net');
assert.strictEqual(net.isLegalPort(''), false);
assert.strictEqual(net.isLegalPort('0'), true);
assert.strictEqual(net.isLegalPort(0), true);
assert.strictEqual(net.isLegalPort(65536), false);
assert.strictEqual(net.isLegalPort('65535'), true);
assert.strictEqual(net.isLegalPort(undefined), false);
assert.strictEqual(net.isLegalPort(null), true);