parsec-node/src/api/methods/getBlockNumber.test.js

https://parseclabs.readthedocs.io/en/latest/

const getBlockNumber = require('./getBlockNumber');

describe('getBlockNumber', () => {
  test('blockNumber from bridgeState', async () => {
    const blockNumber = await getBlockNumber({ blockHeight: 100 });
    expect(blockNumber).toBe('0x64');
  });
});