Add tests for exponential backoff code in _resubmitTx

test/unit/pending-tx-test.js

@@ -273,8 +273,10 @@ describe('PendingTransactionTracker', function () {
     })
   })
   describe('#_resubmitTx', function () {
-    it('should publishing the transaction', function (done) {
-    const enoughBalance = '0x100000'
+    const mockFirstRetryBlockNumber = '0x1'
+    let txMetaToTestExponentialBackoff
+
+    beforeEach(() => {
       pendingTxTracker.getBalance = (address) => {
         assert.equal(address, txMeta.txParams.from, 'Should pass the address')
         return enoughBalance
@@ -282,6 +284,20 @@ describe('PendingTransactionTracker', function () {
       pendingTxTracker.publishTransaction = async (rawTx) => {
         assert.equal(rawTx, txMeta.rawTx, 'Should pass the rawTx')
       }
+      sinon.spy(pendingTxTracker, 'publishTransaction')
+
+      txMetaToTestExponentialBackoff = Object.assign({}, txMeta, {
+        retryCount: 4,
+        firstRetryBlockNumber: mockFirstRetryBlockNumber,
+      })
+    })
+
+    afterEach(() => {
+      pendingTxTracker.publishTransaction.reset()
+    })
+
+    it('should publish the transaction', function (done) {
+      const enoughBalance = '0x100000'
 
       // Stubbing out current account state:
       // Adding the fake tx:
@@ -291,6 +307,36 @@ describe('PendingTransactionTracker', function () {
        assert.ifError(err, 'should not throw an error')
        done(err)
       })
+
+      assert.equal(pendingTxTracker.publishTransaction.callCount, 1, 'Should call publish transaction')
+    })
+
+    it('should not publish the transaction if the limit of retries has been exceeded', function (done) {
+      const enoughBalance = '0x100000'
+      const mockLatestBlockNumber = '0x5'
+
+      pendingTxTracker._resubmitTx(txMetaToTestExponentialBackoff, mockLatestBlockNumber)
+      .then(() => done())
+      .catch((err) => {
+       assert.ifError(err, 'should not throw an error')
+       done(err)
+      })
+
+      assert.equal(pendingTxTracker.publishTransaction.callCount, 0, 'Should NOT call publish transaction')
+    })
+
+    it('should publish the transaction if the number of blocks since last retry exceeds the last set limit', function (done) {
+      const enoughBalance = '0x100000'
+      const mockLatestBlockNumber = '0x11'
+      
+      pendingTxTracker._resubmitTx(txMetaToTestExponentialBackoff, mockLatestBlockNumber)
+      .then(() => done())
+      .catch((err) => {
+       assert.ifError(err, 'should not throw an error')
+       done(err)
+      })
+
+      assert.equal(pendingTxTracker.publishTransaction.callCount, 1, 'Should call publish transaction')
     })
  })
 })