const assert = require("assert");
const logger = require("../kit/logger-kit").getLogger('level-db-test')
const { Level } = require("level");

describe('level-db', () => {
  const db = new Level('app.db', { valueEncoding: 'json' })

  const key = 'test'
  const value = 2

  it('save', async () => {
    await db.put(key, value)
  })

  it('get', async () => {
    const rst = await db.get(key)
    logger.info(`key:${key}, value:${value}, type:${typeof value}, rst type:${typeof rst}.`)
    assert.equal(rst, value, 'test failed.')
  })

  it('get null', async () => {
    const nullKey = 'null'

    try {
      logger.info(await db.get(nullKey))
    } catch (e) {
      logger.info(`不存在的键：${nullKey}.`)
    }
  })
})