71 lines
1.8 KiB
JavaScript
71 lines
1.8 KiB
JavaScript
|
'use strict';
|
||
|
|
|
||
|
|
require('../common');
|
||
|
|
const { spawnSyncAndAssert } = require('../common/child_process');
|
||
|
|
const tmpdir = require('../common/tmpdir');
|
||
|
|
const fs = require('fs');
|
||
|
|
const assert = require('assert');
|
||
|
|
|
||
|
|
// When the test fails this helper can be modified to write outputs
|
||
|
|
// differently and aid debugging.
|
||
|
|
function log(line) {
|
||
|
|
console.log(line);
|
||
|
|
}
|
||
|
|
|
||
|
|
function generateSnapshot() {
|
||
|
|
tmpdir.refresh();
|
||
|
|
|
||
|
|
spawnSyncAndAssert(
|
||
|
|
process.execPath,
|
||
|
|
[
|
||
|
|
'--random_seed=42',
|
||
|
|
'--predictable',
|
||
|
|
'--build-snapshot',
|
||
|
|
'node:generate_default_snapshot',
|
||
|
|
],
|
||
|
|
{
|
||
|
|
env: { ...process.env, NODE_DEBUG_NATIVE: 'SNAPSHOT_SERDES' },
|
||
|
|
cwd: tmpdir.path
|
||
|
|
},
|
||
|
|
{
|
||
|
|
stderr(output) {
|
||
|
|
const lines = output.split('\n');
|
||
|
|
for (const line of lines) {
|
||
|
|
if (line.startsWith('0x')) {
|
||
|
|
log(line);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
},
|
||
|
|
}
|
||
|
|
);
|
||
|
|
const blobPath = tmpdir.resolve('snapshot.blob');
|
||
|
|
return fs.readFileSync(blobPath);
|
||
|
|
}
|
||
|
|
|
||
|
|
const buf1 = generateSnapshot();
|
||
|
|
const buf2 = generateSnapshot();
|
||
|
|
|
||
|
|
const diff = [];
|
||
|
|
let offset = 0;
|
||
|
|
const step = 16;
|
||
|
|
do {
|
||
|
|
const length = Math.min(buf1.length - offset, step);
|
||
|
|
const slice1 = buf1.slice(offset, offset + length).toString('hex');
|
||
|
|
const slice2 = buf2.slice(offset, offset + length).toString('hex');
|
||
|
|
if (slice1 !== slice2) {
|
||
|
|
diff.push({ offset: '0x' + (offset).toString(16), slice1, slice2 });
|
||
|
|
}
|
||
|
|
offset += length;
|
||
|
|
} while (offset < buf1.length);
|
||
|
|
|
||
|
|
assert.strictEqual(offset, buf1.length);
|
||
|
|
if (offset < buf2.length) {
|
||
|
|
const length = Math.min(buf2.length - offset, step);
|
||
|
|
const slice2 = buf2.slice(offset, offset + length).toString('hex');
|
||
|
|
diff.push({ offset, slice1: '', slice2 });
|
||
|
|
offset += length;
|
||
|
|
} while (offset < buf2.length);
|
||
|
|
|
||
|
|
assert.deepStrictEqual(diff, []);
|
||
|
|
assert.strictEqual(buf1.length, buf2.length);
|