mirror of https://github.com/nodejs/node.git
46 lines
1.3 KiB
JavaScript
46 lines
1.3 KiB
JavaScript
// Enforcing strict checks on the order or number of events across different
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// platforms can be tricky and unreliable due to various factors.
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// As a result, this test relies on the `uv_metrics_info` call instead.
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const { performance } = require('node:perf_hooks');
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const assert = require('node:assert');
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const fs = require('node:fs');
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const { nodeTiming } = performance;
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function safeMetricsInfo(cb) {
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setImmediate(() => {
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const info = nodeTiming.uvMetricsInfo;
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cb(info);
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});
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}
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{
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const info = nodeTiming.uvMetricsInfo;
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assert.strictEqual(info.loopCount, 0);
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assert.strictEqual(info.events, 0);
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// This is the only part of the test that we test events waiting
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// Adding checks for this property will make the test flaky
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// as it can be highly influenced by race conditions.
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assert.strictEqual(info.eventsWaiting, 0);
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}
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{
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// The synchronous call should obviously not affect the uv metrics
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const fd = fs.openSync(__filename, 'r');
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fs.readFileSync(fd);
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const info = nodeTiming.uvMetricsInfo;
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assert.strictEqual(info.loopCount, 0);
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assert.strictEqual(info.events, 0);
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assert.strictEqual(info.eventsWaiting, 0);
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}
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{
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function openFile(info) {
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assert.strictEqual(info.loopCount, 1);
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fs.open(__filename, 'r', (err) => {
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assert.ifError(err);
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});
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}
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safeMetricsInfo(openFile);
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} |