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This commit adds a mustNotCall() helper for testing. This provides an alternative to using common.fail() as a callback, or creating a callback function for the sole purpose of calling common.fail(). PR-URL: https://github.com/nodejs/node/pull/11152 Reviewed-By: Rich Trott <rtrott@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com> Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com> Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com> Reviewed-By: Yuta Hiroto <hello@about-hiroppy.com>
30 lines
859 B
JavaScript
30 lines
859 B
JavaScript
'use strict';
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// This example attempts to time out before the connection is established
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// https://groups.google.com/forum/#!topic/nodejs/UE0ZbfLt6t8
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// https://groups.google.com/forum/#!topic/nodejs-dev/jR7-5UDqXkw
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const common = require('../common');
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const net = require('net');
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const assert = require('assert');
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const start = new Date();
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const T = 100;
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// 192.0.2.1 is part of subnet assigned as "TEST-NET" in RFC 5737.
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// For use solely in documentation and example source code.
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// In short, it should be unreachable.
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// In practice, it's a network black hole.
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const socket = net.createConnection(9999, '192.0.2.1');
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socket.setTimeout(T);
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socket.on('timeout', common.mustCall(function() {
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console.error('timeout');
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const now = new Date();
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assert.ok(now - start < T + 500);
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socket.destroy();
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}));
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socket.on('connect', common.mustNotCall());
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