clean up the test

blockchain/block_test.go

@@ -2,7 +2,6 @@ package blockchain
 
 import (
 	"bytes"
-	"fmt"
 	"testing"
 )
 
@@ -24,6 +23,4 @@ func TestBlockSerialize(t *testing.T) {
 	if bytes.Compare(block.Hash, deserializedBlock.Hash) != 0 {
 		t.Errorf("Serialize or Deserialize incorrect at Hash.")
 	}
-
-	fmt.Println(block)
 }

blockchain/blockchain_test.go

@@ -5,7 +5,9 @@ import (
 )
 
 func TestCreateBlockchain(t *testing.T) {
-	CreateBlockchain("minh")
+	if CreateBlockchain("minh") == nil {
+		t.Errorf("failed to create a blockchain")
+	}
 }
 
 func TestFindSpendableOutputs(t *testing.T) {

blockchain/transaction_test.go

@@ -5,5 +5,7 @@ import (
 )
 
 func TestNewCoinbaseTX(t *testing.T) {
-	NewCoinbaseTX("minh", genesisCoinbaseData)
+	if NewCoinbaseTX("minh", genesisCoinbaseData) == nil {
+		t.Errorf("failed to create a coinbase transaction.")
+	}
 }