Add regression test

Author: eelanagaraj

eth/tracers/api_test.go

@@ -495,6 +495,55 @@ func TestTraceTransaction(t *testing.T) {
 	}
 }
 
+// Regression test for debug get/set logic in the EVM & Interpreter.
+// Include registry to ensure that Celo-specific EVM Call's within
+// Tobin Tax and fee distribution logic are triggered.
+func TestTraceTransactionWithRegistryDeployed(t *testing.T) {
+	t.Parallel()
+
+	// Initialize test accounts
+	accounts := newAccounts(2)
+	genesis := &core.Genesis{Alloc: core.GenesisAlloc{
+		accounts[0].addr: {Balance: big.NewInt(params.Ether)},
+		accounts[1].addr: {Balance: big.NewInt(params.Ether)},
+		common.HexToAddress("0xce10"): { // Registry Proxy
+			Code: testutil.RegistryProxyOpcodes,
+			Storage: map[common.Hash]common.Hash{
+				common.HexToHash("0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc"): common.HexToHash("0xce11"), // Registry Implementation
+				common.HexToHash("0x91646b8507bf2e54d7c3de9155442ba111546b81af1cbdd1f68eeb6926b98d58"): common.HexToHash("0xd023"), // Governance Proxy
+			},
+			Balance: big.NewInt(0),
+		},
+		common.HexToAddress("0xce11"): { // Registry Implementation
+			Code:    testutil.RegistryOpcodes,
+			Balance: big.NewInt(0),
+		},
+	}}
+
+	target := common.Hash{}
+	signer := types.HomesteadSigner{}
+	api := NewAPI(newTestBackend(t, 1, genesis, func(i int, b *core.BlockGen) {
+		// Transfer from account[0] to account[1]
+		//    value: 1000 wei
+		//    fee:   0 wei
+		tx, _ := types.SignTx(types.NewTransaction(uint64(i), accounts[1].addr, big.NewInt(1000), params.TxGas, nil, nil, nil, nil, nil), signer, accounts[0].key)
+		b.AddTx(tx)
+		target = tx.Hash()
+	}))
+	result, err := api.TraceTransaction(context.Background(), target, nil)
+	if err != nil {
+		t.Errorf("Failed to trace transaction %v", err)
+	}
+	if !reflect.DeepEqual(result, &ethapi.ExecutionResult{
+		Gas:         params.TxGas,
+		Failed:      false,
+		ReturnValue: "",
+		StructLogs:  []ethapi.StructLogRes{},
+	}) {
+		t.Error("Transaction tracing result is different")
+	}
+}
+
 func TestTraceBlock(t *testing.T) {
 	t.Parallel()