Function assertSnapshot

test/common/assertSnapshot.js:157–175

(actual, filename = process.argv[1])

}

async function assertSnapshot(actual, filename = process.argv[1]) {
  const snapshot = getSnapshotPath(filename);
  if (process.env.NODE_REGENERATE_SNAPSHOTS) {
    await fs.writeFile(snapshot, actual);
  } else {
    let expected;
    try {
      expected = await fs.readFile(snapshot, 'utf8');
    } catch (e) {
      if (e.code === 'ENOENT') {
        console.log(
          'Snapshot file does not exist. You can create a new one by running the test with NODE_REGENERATE_SNAPSHOTS=1',
        );
      }
      throw e;
    }
    assert.strictEqual(actual, replaceWindowsLineEndings(expected));
  }
}

/**
 * Spawn a process and assert its output against a snapshot.