metamask-extension/test/unit/migrations/025-test.js

const assert = require('assert')
const migration25 = require('../../../app/scripts/migrations/025')
const firstTimeState = {
  meta: {},
  data: require('../../../app/scripts/first-time-state'),
}

const storage = {
  "meta": {},
  "data": {
    "TransactionController": {
      "transactions": [
      ]
    },
  },
}

const transactions = []


while (transactions.length <= 10) {
  transactions.push({ txParams: { from: '0x8aCce2391c0d510a6c5E5d8f819a678f79b7e675', random: 'stuff', chainId: 2 }, status: 'unapproved' })
  transactions.push({ txParams: { from: '0x8aCce2391c0d510a6c5E5d8f819a678f79b7e675' }, status: 'confirmed' })
}


storage.data.TransactionController.transactions = transactions

describe('storage is migrated successfully and the txParams.from are lowercase', () => {
  it('should lowercase the from for unapproved txs', (done) => {
    migration25.migrate(storage)
    .then((migratedData) => {
      const migratedTransactions = migratedData.data.TransactionController.transactions
      migratedTransactions.forEach((tx) => {
        if (tx.status === 'unapproved') assert(!tx.txParams.random)
        if (tx.status === 'unapproved') assert(!tx.txParams.chainId)
      })
      done()
    }).catch(done)
  })

  it('should migrate first time state', (done) => {
    migration25.migrate(firstTimeState)
    .then((migratedData) => {
      assert.equal(migratedData.meta.version, 25)
      done()
    }).catch(done)
  })
})