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52cb410402
Add process.cpuUsage() method that returns the user and system CPU time usage of the current process PR-URL: https://github.com/nodejs/node/pull/6157 Reviewed-By: Robert Lindstaedt <robert.lindstaedt@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Trevor Norris <trev.norris@gmail.com> Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>
64 lines
2.0 KiB
JavaScript
64 lines
2.0 KiB
JavaScript
'use strict';
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require('../common');
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const assert = require('assert');
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const result = process.cpuUsage();
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// Validate the result of calling with no previous value argument.
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validateResult(result);
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// Validate the result of calling with a previous value argument.
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validateResult(process.cpuUsage(result));
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// Ensure the results are >= the previous.
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let thisUsage;
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let lastUsage = process.cpuUsage();
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for (let i = 0; i < 10; i++) {
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thisUsage = process.cpuUsage();
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validateResult(thisUsage);
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assert(thisUsage.user >= lastUsage.user);
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assert(thisUsage.system >= lastUsage.system);
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lastUsage = thisUsage;
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}
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// Ensure that the diffs are >= 0.
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let startUsage;
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let diffUsage;
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for (let i = 0; i < 10; i++) {
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startUsage = process.cpuUsage();
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diffUsage = process.cpuUsage(startUsage);
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validateResult(startUsage);
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validateResult(diffUsage);
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assert(diffUsage.user >= 0);
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assert(diffUsage.system >= 0);
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}
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// Ensure that an invalid shape for the previous value argument throws an error.
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assert.throws(function() { process.cpuUsage(1); });
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assert.throws(function() { process.cpuUsage({}); });
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assert.throws(function() { process.cpuUsage({ user: 'a' }); });
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assert.throws(function() { process.cpuUsage({ system: 'b' }); });
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assert.throws(function() { process.cpuUsage({ user: null, system: 'c' }); });
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assert.throws(function() { process.cpuUsage({ user: 'd', system: null }); });
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assert.throws(function() { process.cpuUsage({ user: -1, system: 2 }); });
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assert.throws(function() { process.cpuUsage({ user: 3, system: -2 }); });
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assert.throws(function() { process.cpuUsage({
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user: Number.POSITIVE_INFINITY,
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system: 4
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});});
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assert.throws(function() { process.cpuUsage({
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user: 5,
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system: Number.NEGATIVE_INFINITY
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});});
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// Ensure that the return value is the expected shape.
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function validateResult(result) {
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assert.notEqual(result, null);
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assert(Number.isFinite(result.user));
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assert(Number.isFinite(result.system));
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assert(result.user >= 0);
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assert(result.system >= 0);
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}
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