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test-debugger-heap-profiler.js
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test-debugger-heap-profiler.js
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'use strict';
const common = require('../common');
common.skipIfInspectorDisabled();
if (!common.isMainThread) {
common.skip('process.chdir() is not available in workers');
}
const fixtures = require('../common/fixtures');
const startCLI = require('../common/inspector-cli');
const tmpdir = require('../common/tmpdir');
tmpdir.refresh();
process.chdir(tmpdir.path);
const { readFileSync } = require('fs');
const filename = 'node.heapsnapshot';
// Heap profiler take snapshot.
{
const cli = startCLI([fixtures.path('debugger/empty.js')]);
function onFatal(error) {
cli.quit();
throw error;
}
// Check that the snapshot is valid JSON.
return cli.waitForInitialBreak()
.then(() => cli.waitForPrompt())
.then(() => cli.command('takeHeapSnapshot()'))
.then(() => JSON.parse(readFileSync(filename, 'utf8')))
// Check that two simultaneous snapshots don't step all over each other.
// Refs: https://github.com/nodejs/node/issues/39555
.then(() => cli.command('takeHeapSnapshot(); takeHeapSnapshot()'))
.then(() => JSON.parse(readFileSync(filename, 'utf8')))
.then(() => cli.quit())
.then(null, onFatal);
}