cmd/evm: add --run option to blocktest command (#28421)

Co-authored-by: lightclient <lightclient@protonmail.com>

cmd/evm/blockrunner.go

@@ -21,6 +21,7 @@ import (
 	"errors"
 	"fmt"
 	"os"
+	"regexp"
 	"sort"
 
 	"github.com/ethereum/go-ethereum/core/rawdb"
@@ -30,11 +31,18 @@ import (
 	"github.com/urfave/cli/v2"
 )
 
+var RunFlag = &cli.StringFlag{
+	Name:  "run",
+	Value: ".*",
+	Usage: "Run only those tests matching the regular expression.",
+}
+
 var blockTestCommand = &cli.Command{
 	Action:    blockTestCmd,
 	Name:      "blocktest",
 	Usage:     "executes the given blockchain tests",
 	ArgsUsage: "<file>",
+	Flags:     []cli.Flag{RunFlag},
 }
 
 func blockTestCmd(ctx *cli.Context) error {
@@ -61,13 +69,21 @@ func blockTestCmd(ctx *cli.Context) error {
 	if err = json.Unmarshal(src, &tests); err != nil {
 		return err
 	}
-	// run them in order
+	re, err := regexp.Compile(ctx.String(RunFlag.Name))
+	if err != nil {
+		return fmt.Errorf("invalid regex -%s: %v", RunFlag.Name, err)
+	}
+
+	// Run them in order
 	var keys []string
 	for key := range tests {
 		keys = append(keys, key)
 	}
 	sort.Strings(keys)
 	for _, name := range keys {
+		if !re.MatchString(name) {
+			continue
+		}
 		test := tests[name]
 		if err := test.Run(false, rawdb.HashScheme, tracer); err != nil {
 			return fmt.Errorf("test %v: %w", name, err)