metamask-extension/test/unit/app/controllers/transactions/tx-utils-test.js

const assert = require('assert')
const txUtils = require('../../../../../app/scripts/controllers/transactions/lib/util')


describe('txUtils', function () {
  describe('#validateTxParams', function () {
    it('does not throw for positive values', function () {
      var sample = {
        from: '0x1678a085c290ebd122dc42cba69373b5953b831d',
        value: '0x01',
      }
      txUtils.validateTxParams(sample)
    })

    it('returns error for negative values', function () {
      var sample = {
        from: '0x1678a085c290ebd122dc42cba69373b5953b831d',
        value: '-0x01',
      }
      try {
        txUtils.validateTxParams(sample)
      } catch (err) {
        assert.ok(err, 'error')
      }
    })
  })

  describe('#normalizeTxParams', () => {
    it('should normalize txParams', () => {
      let txParams = {
        chainId: '0x1',
        from: 'a7df1beDBF813f57096dF77FCd515f0B3900e402',
        to: null,
        data: '68656c6c6f20776f726c64',
        random: 'hello world',
      }

      let normalizedTxParams = txUtils.normalizeTxParams(txParams)

      assert(!normalizedTxParams.chainId, 'their should be no chainId')
      assert(!normalizedTxParams.to, 'their should be no to address if null')
      assert.equal(normalizedTxParams.from.slice(0, 2), '0x', 'from should be hexPrefixd')
      assert.equal(normalizedTxParams.data.slice(0, 2), '0x', 'data should be hexPrefixd')
      assert(!('random' in normalizedTxParams), 'their should be no random key in normalizedTxParams')

      txParams.to = 'a7df1beDBF813f57096dF77FCd515f0B3900e402'
      normalizedTxParams = txUtils.normalizeTxParams(txParams)
      assert.equal(normalizedTxParams.to.slice(0, 2), '0x', 'to should be hexPrefixd')

    })
  })

  describe('#validateRecipient', () => {
    it('removes recipient for txParams with 0x when contract data is provided', function () {
      const zeroRecipientandDataTxParams = {
        from: '0x1678a085c290ebd122dc42cba69373b5953b831d',
        to: '0x',
        data: 'bytecode',
      }
      const sanitizedTxParams = txUtils.validateRecipient(zeroRecipientandDataTxParams)
      assert.deepEqual(sanitizedTxParams, { from: '0x1678a085c290ebd122dc42cba69373b5953b831d', data: 'bytecode' }, 'no recipient with 0x')
    })

    it('should error when recipient is 0x', function () {
      const zeroRecipientTxParams = {
        from: '0x1678a085c290ebd122dc42cba69373b5953b831d',
        to: '0x',
      }
      assert.throws(() => { txUtils.validateRecipient(zeroRecipientTxParams) }, Error, 'Invalid recipient address')
    })
  })


  describe('#validateFrom', () => {
    it('should error when from is not a hex string', function () {

      // where from is undefined
      const txParams = {}
      assert.throws(() => { txUtils.validateFrom(txParams) }, Error, `Invalid from address ${txParams.from} not a string`)

      // where from is array
      txParams.from = []
      assert.throws(() => { txUtils.validateFrom(txParams) }, Error, `Invalid from address ${txParams.from} not a string`)

      // where from is a object
      txParams.from = {}
      assert.throws(() => { txUtils.validateFrom(txParams) }, Error, `Invalid from address ${txParams.from} not a string`)

      // where from is a invalid address
      txParams.from = 'im going to fail'
      assert.throws(() => { txUtils.validateFrom(txParams) }, Error, `Invalid from address`)

      // should run
      txParams.from ='0x1678a085c290ebd122dc42cba69373b5953b831d'
      txUtils.validateFrom(txParams)
      })
  })
})