eth/tracers: fix the testcase of empty code

Signed-off-by: Delweng <delweng@gmail.com>

Author: jsvisa

eth/tracers/internal/tracetest/prestate_test.go

@@ -60,7 +60,7 @@ func TestPrestateTracer(t *testing.T) {
 	testPrestateDiffTracer("prestateTracer", "prestate_tracer", t, func() interface{} { return new(prestateTrace) })
 }
 
-func TestPrestateWithCollectPostTracer(t *testing.T) {
+func TestPrestateWithDiffModeTracer(t *testing.T) {
 	testPrestateDiffTracer("prestateTracer", "prestate_tracer_with_diff_mode", t, func() interface{} { return new(prePostStateTrace) })
 }
 

eth/tracers/internal/tracetest/testdata/prestate_tracer/simple.json

@@ -59,8 +59,7 @@
   "result": {
     "0x0024f658a46fbb89d8ac105e98d7ac7cbbaf27c5": {
       "balance": "0x0",
-      "nonce": 22,
-      "code": "0x"
+      "nonce": 22
     },
     "0x3b873a919aa0512d5a0f09e6dcceaa4a6727fafe": {
       "balance": "0x4d87094125a369d9bd5",
@@ -75,13 +74,11 @@
     },
     "0xb436ba50d378d4bbc8660d312a13df6af6e89dfb": {
       "balance": "0x1780d77678137ac1b775",
-      "nonce": 29072,
-      "code": "0x"
+      "nonce": 29072
     },
     "0x1585936b53834b021f68cc13eeefdec2efc8e724": {
       "balance": "0x0",
-      "nonce": 0,
-      "code": "0x"
+      "nonce": 0
     }
   }
 }

eth/tracers/internal/tracetest/testdata/prestate_tracer_with_diff_mode/create.json

@@ -59,13 +59,11 @@
     "pre": {
       "0x2a65aca4d5fc5b5c859090a6c34d164135398226": {
         "balance": "0x9fb6b81e112638b886",
-        "nonce": 217865,
-        "code": "0x"
+        "nonce": 217865
       },
       "0xf0c5cef39b17c213cfe090a46b8c7760ffb7928a": {
         "balance": "0x15b6828e22bb12188",
-        "nonce": 747,
-        "code": "0x"
+        "nonce": 747
       }
     },
     "post": {

eth/tracers/internal/tracetest/testdata/prestate_tracer_with_diff_mode/create_suicide.json

@@ -71,25 +71,21 @@
     "pre": {
       "0x082d4cdf07f386ffa9258f52a5c49db4ac321ec6": {
         "balance": "0xc820f93200f4000",
-        "nonce": 94,
-        "code": "0x"
+        "nonce": 94
       },
       "0x332b656504f4eabb44c8617a42af37461a34e9dc": {
         "balance": "0x11faea4f35e5af80000",
-        "code": "0x",
         "storage": {
           "0x0000000000000000000000000000000000000000000000000000000000000000": "0x0000000000000000000000000000000000000000000000000000000000000000"
         }
       },
       "0x52bc44d5378309ee2abf1539bf71de1b7d7be3b5": {
         "balance": "0xbf681825be002ac452",
-        "nonce": 28922,
-        "code": "0x"
+        "nonce": 28922
       },
       "0x82effbaaaf28614e55b2ba440fb198e0e5789b0f": {
         "balance": "0xb3d0ac5cb94df6f6b0",
-        "nonce": 1,
-        "code": "0x"
+        "nonce": 1
       }
     },
     "post": {

eth/tracers/internal/tracetest/testdata/prestate_tracer_with_diff_mode/inner_create.json

@@ -207,8 +207,7 @@
     "pre": {
       "0x2a65aca4d5fc5b5c859090a6c34d164135398226": {
         "balance": "0x98e1c608601c2496b2",
-        "nonce": 218916,
-        "code": "0x"
+        "nonce": 218916
       },
       "0x6c8f2a135f6ed072de4503bd7c4999a1a17f824b": {
         "balance": "0x0",
@@ -303,13 +302,11 @@
       },
       "0xb834e3edfc1a927bdcecb67a9d0eccbd752a5bb3": {
         "balance": "0xffe9b09a5c474dca",
-        "nonce": 975,
-        "code": "0x"
+        "nonce": 975
       },
       "0xd3cda913deb6f67967b99d67acdfa1712c293601": {
         "balance": "0x4f5807198e238f13e",
-        "nonce": 283,
-        "code": "0x"
+        "nonce": 283
       }
     },
     "post": {

eth/tracers/internal/tracetest/testdata/prestate_tracer_with_diff_mode/simple.json

@@ -63,12 +63,10 @@
     "pre": {
       "0x0024f658a46fbb89d8ac105e98d7ac7cbbaf27c5": {
         "balance": "0x0",
-        "nonce": 22,
-        "code": "0x"
+        "nonce": 22
       },
       "0x1585936b53834b021f68cc13eeefdec2efc8e724": {
-        "balance": "0x0",
-        "code": "0x"
+        "balance": "0x0"
       },
       "0x3b873a919aa0512d5a0f09e6dcceaa4a6727fafe": {
         "balance": "0x4d87094125a369d9bd5",
@@ -83,8 +81,7 @@
       },
       "0xb436ba50d378d4bbc8660d312a13df6af6e89dfb": {
         "balance": "0x1780d77678137ac1b775",
-        "nonce": 29072,
-        "code": "0x"
+        "nonce": 29072
       }
     },
     "post": {

eth/tracers/internal/tracetest/testdata/prestate_tracer_with_diff_mode/suicide.json

@@ -87,13 +87,11 @@
       },
       "0x2a65aca4d5fc5b5c859090a6c34d164135398226": {
         "balance": "0x326601cc6cf364f6b9",
-        "nonce": 12122,
-        "code": "0x"
+        "nonce": 12122
       },
       "0xd3cda913deb6f67967b99d67acdfa1712c293601": {
         "balance": "0x1ff0509d9d6821e26",
-        "nonce": 138,
-        "code": "0x"
+        "nonce": 138
       }
     },
     "post": {