tests: golint fixes for tests directory (#16640)

tests/block_test_util.go

@@ -104,7 +104,7 @@ func (t *BlockTest) Run() error {
 		return err
 	}
 	if gblock.Hash() != t.json.Genesis.Hash {
-		return fmt.Errorf("genesis block hash doesn't match test: computed=%x, test=%x\n", gblock.Hash().Bytes()[:6], t.json.Genesis.Hash[:6])
+		return fmt.Errorf("genesis block hash doesn't match test: computed=%x, test=%x", gblock.Hash().Bytes()[:6], t.json.Genesis.Hash[:6])
 	}
 	if gblock.Root() != t.json.Genesis.StateRoot {
 		return fmt.Errorf("genesis block state root does not match test: computed=%x, test=%x", gblock.Root().Bytes()[:6], t.json.Genesis.StateRoot[:6])

tests/init.go

@@ -23,7 +23,7 @@ import (
 	"github.com/ethereum/go-ethereum/params"
 )
 
-// This table defines supported forks and their chain config.
+// Forks table defines supported forks and their chain config.
 var Forks = map[string]*params.ChainConfig{
 	"Frontier": {
 		ChainId: big.NewInt(1),

tests/init_test.go

@@ -42,7 +42,7 @@ var (
 	difficultyTestDir  = filepath.Join(baseDir, "BasicTests")
 )
 
-func readJson(reader io.Reader, value interface{}) error {
+func readJSON(reader io.Reader, value interface{}) error {
 	data, err := ioutil.ReadAll(reader)
 	if err != nil {
 		return fmt.Errorf("error reading JSON file: %v", err)
@@ -57,14 +57,14 @@ func readJson(reader io.Reader, value interface{}) error {
 	return nil
 }
 
-func readJsonFile(fn string, value interface{}) error {
+func readJSONFile(fn string, value interface{}) error {
 	file, err := os.Open(fn)
 	if err != nil {
 		return err
 	}
 	defer file.Close()
 
-	err = readJson(file, value)
+	err = readJSON(file, value)
 	if err != nil {
 		return fmt.Errorf("%s in file %s", err.Error(), fn)
 	}
@@ -169,9 +169,8 @@ func (tm *testMatcher) checkFailure(t *testing.T, name string, err error) error
 		if err != nil {
 			t.Logf("error: %v", err)
 			return nil
-		} else {
-			return fmt.Errorf("test succeeded unexpectedly")
 		}
+		return fmt.Errorf("test succeeded unexpectedly")
 	}
 	return err
 }
@@ -213,7 +212,7 @@ func (tm *testMatcher) runTestFile(t *testing.T, path, name string, runTest inte
 
 	// Load the file as map[string]<testType>.
 	m := makeMapFromTestFunc(runTest)
-	if err := readJsonFile(path, m.Addr().Interface()); err != nil {
+	if err := readJSONFile(path, m.Addr().Interface()); err != nil {
 		t.Fatal(err)
 	}
 

tests/transaction_test_util.go

@@ -72,9 +72,8 @@ func (tt *TransactionTest) Run(config *params.ChainConfig) error {
 	if err := rlp.DecodeBytes(tt.json.RLP, tx); err != nil {
 		if tt.json.Transaction == nil {
 			return nil
-		} else {
-			return fmt.Errorf("RLP decoding failed: %v", err)
 		}
+		return fmt.Errorf("RLP decoding failed: %v", err)
 	}
 	// Check sender derivation.
 	signer := types.MakeSigner(config, new(big.Int).SetUint64(uint64(tt.json.BlockNumber)))