fix(GPO): tests (#938)

* fix(GPO): tests

* fix `newTestBackend`

* improve

---------

Co-authored-by: HAOYUatHZ <haoyu@protonmail.com>
Co-authored-by: HAOYUatHZ <37070449+HAOYUatHZ@users.noreply.github.com>

Author: jonastheis

eth/gasprice/feehistory_test.go

@@ -51,7 +51,7 @@ func TestFeeHistory(t *testing.T) {
 		{true, 1000, 1000, 2, rpc.PendingBlockNumber, nil, 32, 2, nil},
 		{true, 1000, 1000, 2, rpc.PendingBlockNumber, []float64{0, 10}, 32, 2, nil},
 		{false, 1000, 1000, 2, rpc.FinalizedBlockNumber, []float64{0, 10}, 24, 2, nil},
-		{false, 1000, 1000, 2, rpc.SafeBlockNumber, []float64{0, 10}, 24, 2, nil},
+		//{false, 1000, 1000, 2, rpc.SafeBlockNumber, []float64{0, 10}, 24, 2, nil}, // We currently do not use  rpc.SafeBlockNumber
 	}
 	for i, c := range cases {
 		config := Config{

eth/gasprice/gasprice_test.go

@@ -143,10 +143,12 @@ func newTestBackend(t *testing.T, londonBlock *big.Int, pending bool) *testBacke
 	config.BernoulliBlock = londonBlock
 	config.CurieBlock = londonBlock
 	config.ShanghaiTime = nil
+	config.DarwinTime = nil
 	if londonBlock != nil {
 		shanghaiTime := londonBlock.Uint64() * 12
 		config.ShanghaiTime = &shanghaiTime
-		config.DarwinTime = &shanghaiTime
+		darwinTime := londonBlock.Uint64() * 12
+		config.DarwinTime = &darwinTime
 	}
 
 	config.TerminalTotalDifficulty = common.Big0