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'use strict';
const { test } = require('tap');
const { readFileSync, unlinkSync } = require('fs');
const startCLI = require('./start-cli');
const filename = 'node.heapsnapshot';
function cleanup() {
try {
unlinkSync(filename);
} catch (_) {
// Ignore.
}
}
cleanup();
test('Heap profiler take snapshot', (t) => {
const cli = startCLI(['examples/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')))
.then(() => cleanup())
.then(() => cli.quit())
.then(null, onFatal);
});