Add tests for pkg/geth/blockchain

- inject dependencies instead of initializing them in the constructor

examples/erc20_watcher/every_block/fetcher_test.go

@@ -15,29 +15,51 @@
 package every_block_test
 
 import (
+	"github.com/ethereum/go-ethereum/ethclient"
+	"github.com/ethereum/go-ethereum/rpc"
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
 	"github.com/vulcanize/vulcanizedb/examples/constants"
 	"github.com/vulcanize/vulcanizedb/examples/erc20_watcher/every_block"
 	"github.com/vulcanize/vulcanizedb/examples/mocks"
 	"github.com/vulcanize/vulcanizedb/pkg/geth"
+	"github.com/vulcanize/vulcanizedb/pkg/geth/client"
+	rpc2 "github.com/vulcanize/vulcanizedb/pkg/geth/converters/rpc"
+	"github.com/vulcanize/vulcanizedb/pkg/geth/node"
 	"math/big"
 )
 
 var _ = Describe("ERC20 Fetcher", func() {
 	blockNumber := int64(5502914)
-
 	infuraIPC := "https://mainnet.infura.io/J5Vd2fRtGsw0zZ0Ov3BL"
-	realBlockchain := geth.NewBlockChain(infuraIPC)
-	realFetcher := every_block.NewFetcher(realBlockchain)
+	var errorFetcher every_block.Fetcher
+	var realFetcher every_block.Fetcher
+	var testFetcher every_block.Fetcher
+	var fakeBlockchain *mocks.Blockchain
+	var testAbi string
+	var testContractAddress string
 
-	fakeBlockchain := &mocks.Blockchain{}
-	testFetcher := every_block.NewFetcher(fakeBlockchain)
-	testAbi := "testAbi"
-	testContractAddress := "testContractAddress"
+	BeforeEach(func() {
+		rpcClient, err := rpc.Dial(infuraIPC)
+		Expect(err).NotTo(HaveOccurred())
+		ethClient := ethclient.NewClient(rpcClient)
+		blockChainClient := client.NewClient(ethClient)
+		clientWrapper := node.ClientWrapper{
+			ContextCaller: rpcClient,
+			IPCPath:       infuraIPC,
+		}
+		node := node.MakeNode(clientWrapper)
+		transactionConverter := rpc2.NewRpcTransactionConverter(ethClient)
+		realBlockChain := geth.NewBlockChain(blockChainClient, node, transactionConverter)
+		realFetcher = every_block.NewFetcher(realBlockChain)
+		fakeBlockchain = &mocks.Blockchain{}
+		testFetcher = every_block.NewFetcher(fakeBlockchain)
+		testAbi = "testAbi"
+		testContractAddress = "testContractAddress"
 
-	errorBlockchain := &mocks.FailureBlockchain{}
-	errorFetcher := every_block.NewFetcher(errorBlockchain)
+		errorBlockchain := &mocks.FailureBlockchain{}
+		errorFetcher = every_block.NewFetcher(errorBlockchain)
+	})
 
 	Describe("FetchSupplyOf", func() {
 		It("fetches data from the blockchain with the correct arguments", func() {