Fix fuzzer.

Author: ncruces

driver/savepoint_test.go

@@ -6,6 +6,7 @@ import (
 
 	"github.com/ncruces/go-sqlite3/driver"
 	_ "github.com/ncruces/go-sqlite3/embed"
+	_ "github.com/ncruces/go-sqlite3/internal/testcfg"
 	_ "github.com/ncruces/go-sqlite3/vfs/memdb"
 )
 

driver/whitespace.go

@@ -3,11 +3,11 @@ package driver
 func notWhitespace(sql string) bool {
 	const (
 		code = iota
-		minus
 		slash
+		minus
 		ccomment
-		endcomment
 		sqlcomment
+		endcomment
 	)
 
 	state := code
@@ -19,29 +19,33 @@ func notWhitespace(sql string) bool {
 		switch state {
 		case code:
 			switch b {
-			case '-':
-				state = minus
 			case '/':
 				state = slash
+			case '-':
+				state = minus
 			case ' ', ';', '\t', '\n', '\v', '\f', '\r':
 				continue
 			default:
 				return true
 			}
-		case minus:
-			if b != '-' {
-				return true
-			}
-			state = sqlcomment
 		case slash:
 			if b != '*' {
 				return true
 			}
 			state = ccomment
+		case minus:
+			if b != '-' {
+				return true
+			}
+			state = sqlcomment
 		case ccomment:
 			if b == '*' {
 				state = endcomment
 			}
+		case sqlcomment:
+			if b == '\n' {
+				state = code
+			}
 		case endcomment:
 			switch b {
 			case '/':
@@ -51,17 +55,7 @@ func notWhitespace(sql string) bool {
 			default:
 				state = ccomment
 			}
-		case sqlcomment:
-			if b == '\n' {
-				state = code
-			}
 		}
 	}
-
-	switch state {
-	case code, ccomment, endcomment, sqlcomment:
-		return false
-	default:
-		return true
-	}
+	return state == slash || state == minus
 }

driver/whitespace_test.go

@@ -3,9 +3,12 @@ package driver
 import (
 	"context"
 	"testing"
+
+	_ "github.com/ncruces/go-sqlite3/embed"
+	_ "github.com/ncruces/go-sqlite3/internal/testcfg"
 )
 
-func Fuzz_isWhitespace(f *testing.F) {
+func Fuzz_notWhitespace(f *testing.F) {
 	f.Add("")
 	f.Add(" ")
 	f.Add(";")
@@ -27,10 +30,15 @@ func Fuzz_isWhitespace(f *testing.F) {
 	defer db.Close()
 
 	f.Fuzz(func(t *testing.T, str string) {
+		if len(str) > 128 {
+			t.SkipNow()
+		}
+
 		c, err := db.Conn(context.Background())
 		if err != nil {
 			t.Fatal(err)
 		}
+		defer c.Close()
 
 		c.Raw(func(driverConn any) error {
 			conn := driverConn.(*conn).Conn