cmd/evm: restore --bench flag to evm statetest (#31055)

Refactoring of the `evm` command moved where some commands were valid.
One command, `--bench`, used to work in `evm statetest`. The pluming is
still in place. This PR puts the `--bench` flag in the place the trace
flags were moved, and adds tests to validate the bench flag operates in
`run` and `statetest`

---------

Co-authored-by: Felix Lange <fjl@twurst.com>

cmd/evm/staterunner.go

@@ -51,6 +51,7 @@ var stateTestCommand = &cli.Command{
 	Usage:     "Executes the given state tests. Filenames can be fed via standard input (batch mode) or as an argument (one-off execution).",
 	ArgsUsage: "<file>",
 	Flags: slices.Concat([]cli.Flag{
+		BenchFlag,
 		DumpFlag,
 		HumanReadableFlag,
 		RunFlag,

cmd/evm/t8n_test.go

@@ -24,6 +24,7 @@ import (
 	"os"
 	"path/filepath"
 	"reflect"
+	"regexp"
 	"strings"
 	"testing"
 
@@ -670,6 +671,61 @@ func TestEvmRun(t *testing.T) {
 	}
 }
 
+func TestEvmRunRegEx(t *testing.T) {
+	t.Parallel()
+	tt := cmdtest.NewTestCmd(t, nil)
+	for i, tc := range []struct {
+		input      []string
+		wantStdout string
+		wantStderr string
+	}{
+		{ // json tracing
+			input:      []string{"run", "--bench", "6040"},
+			wantStdout: "./testdata/evmrun/9.out.1.txt",
+			wantStderr: "./testdata/evmrun/9.out.2.txt",
+		},
+		{ // statetest subcommand
+			input:      []string{"statetest", "--bench", "./testdata/statetest.json"},
+			wantStdout: "./testdata/evmrun/10.out.1.txt",
+			wantStderr: "./testdata/evmrun/10.out.2.txt",
+		},
+	} {
+		tt.Logf("args: go run ./cmd/evm %v\n", strings.Join(tc.input, " "))
+		tt.Run("evm-test", tc.input...)
+
+		haveStdOut := tt.Output()
+		tt.WaitExit()
+		haveStdErr := tt.StderrText()
+
+		if have, wantFile := haveStdOut, tc.wantStdout; wantFile != "" {
+			want, err := os.ReadFile(wantFile)
+			if err != nil {
+				t.Fatalf("test %d: could not read expected output: %v", i, err)
+			}
+			re, err := regexp.Compile(string(want))
+			if err != nil {
+				t.Fatalf("test %d: could not compile regular expression: %v", i, err)
+			}
+			if !re.Match(have) {
+				t.Fatalf("test %d, output wrong, have \n%v\nwant\n%v\n", i, string(have), re)
+			}
+		}
+		if have, wantFile := haveStdErr, tc.wantStderr; wantFile != "" {
+			want, err := os.ReadFile(wantFile)
+			if err != nil {
+				t.Fatalf("test %d: could not read expected output: %v", i, err)
+			}
+			re, err := regexp.Compile(string(want))
+			if err != nil {
+				t.Fatalf("test %d: could not compile regular expression: %v", i, err)
+			}
+			if !re.MatchString(have) {
+				t.Fatalf("test %d, output wrong, have \n%v\nwant\n%v\n", i, have, re)
+			}
+		}
+	}
+}
+
 // cmpJson compares the JSON in two byte slices.
 func cmpJson(a, b []byte) (bool, error) {
 	var j, j2 interface{}

cmd/evm/testdata/evmrun/10.out.1.txt

@@ -0,0 +1,15 @@
+\[
+  \{
+    "name": "00000006-naivefuzz-0",
+    "pass": false,
+    "stateRoot": "0xad1024c87b5548e77c937aa50f72b6cb620d278f4dd79bae7f78f71ff75af458",
+    "fork": "London",
+    "error": "post state root mismatch: got ad1024c87b5548e77c937aa50f72b6cb620d278f4dd79bae7f78f71ff75af458, want 0000000000000000000000000000000000000000000000000000000000000000",
+    "benchStats": \{
+      "time": \d+,
+      "allocs": \d+,
+      "bytesAllocated": \d+,
+      "gasUsed": \d+
+    \}
+  \}
+\]

cmd/evm/testdata/evmrun/9.out.2.txt

@@ -0,0 +1,4 @@
+EVM gas used:    \d+
+execution time:  \d+\.\d+.s
+allocations:     \d+
+allocated bytes: \d+