adding transaction controller tests

app/scripts/controllers/transactions/lib/recipient-blacklist-checker.js

@@ -30,7 +30,7 @@ async function checkAccount (networkId, account) {
   const damnedAccounts = await keyring.getAccounts()
   for (let i = 0; i < damnedAccounts.length; i++) {
     if (damnedAccounts[i].toLowerCase() === accountToCheck) {
-      throw new Error('this is a public account')
+      throw new Error('Recipient is a public account')
     }
   }
 }

test/unit/app/controllers/transactions/tx-controller-test.js

@@ -185,6 +185,23 @@ describe('Transaction Controller', function () {
       .catch(done)
     })
 
+    it('should fail if recipient is public', function (done) {
+      txController.networkStore = new ObservableStore(1)
+      txController.addUnapprovedTransaction({ from: '0x1678a085c290ebd122dc42cba69373b5953b831d', to: '0x0d1d4e623D10F9FBA5Db95830F7d3839406C6AF2' })
+      .catch((err) => {
+        if (err.message === 'Recipient is a public account') done()
+        else done(err)
+      })
+    })
+
+    it('should not fail if recipient is public but not on mainnet', function (done) {
+      txController.once('newUnapprovedTx', (txMetaFromEmit) => {
+        assert(txMetaFromEmit, 'txMeta is falsey')
+        done()
+      })
+      txController.addUnapprovedTransaction({ from: '0x1678a085c290ebd122dc42cba69373b5953b831d', to: '0x0d1d4e623D10F9FBA5Db95830F7d3839406C6AF2' })
+      .catch(done)
+    })
   })
 
   describe('#addTxGasDefaults', function () {