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test-snapshot-incompatible.js
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test-snapshot-incompatible.js
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'use strict';
// This tests that Node.js refuses to load snapshots built with incompatible
// V8 configurations.
require('../common');
const assert = require('assert');
const { spawnSync } = require('child_process');
const tmpdir = require('../common/tmpdir');
const fixtures = require('../common/fixtures');
const path = require('path');
const fs = require('fs');
tmpdir.refresh();
const blobPath = path.join(tmpdir.path, 'snapshot.blob');
const entry = fixtures.path('empty.js');
// The flag used can be any flag that makes a difference in
// v8::ScriptCompiler::CachedDataVersionTag(). --harmony
// is chosen here because it's stable enough and makes a difference.
{
// Build a snapshot with --harmony.
const child = spawnSync(process.execPath, [
'--harmony',
'--snapshot-blob',
blobPath,
'--build-snapshot',
entry,
], {
cwd: tmpdir.path
});
if (child.status !== 0) {
console.log(child.stderr.toString());
console.log(child.stdout.toString());
assert.strictEqual(child.status, 0);
}
const stats = fs.statSync(path.join(tmpdir.path, 'snapshot.blob'));
assert(stats.isFile());
}
{
// Now load the snapshot without --harmony, which should fail.
const child = spawnSync(process.execPath, [
'--snapshot-blob',
blobPath,
], {
cwd: tmpdir.path,
env: {
...process.env,
}
});
const stderr = child.stderr.toString().trim();
assert.match(stderr, /Failed to load the startup snapshot/);
assert.strictEqual(child.status, 1);
}
{
// Load it again with --harmony and it should work.
const child = spawnSync(process.execPath, [
'--harmony',
'--snapshot-blob',
blobPath,
], {
cwd: tmpdir.path,
env: {
...process.env,
}
});
if (child.status !== 0) {
console.log(child.stderr.toString());
console.log(child.stdout.toString());
assert.strictEqual(child.status, 0);
}
}