MVCC memory VFS. (#309)

tests/parallel/parallel_test.go

@@ -18,6 +18,7 @@ import (
 	"github.com/ncruces/go-sqlite3/vfs"
 	_ "github.com/ncruces/go-sqlite3/vfs/adiantum"
 	"github.com/ncruces/go-sqlite3/vfs/memdb"
+	"github.com/ncruces/go-sqlite3/vfs/mvcc"
 	_ "github.com/ncruces/go-sqlite3/vfs/xts"
 )
 
@@ -98,6 +99,22 @@ func Test_memdb(t *testing.T) {
 	testIntegrity(t, name)
 }
 
+func Test_mvcc(t *testing.T) {
+	var iter int
+	if testing.Short() {
+		iter = 1000
+	} else {
+		iter = 5000
+	}
+
+	mvcc.Create("test.db", "")
+	name := "file:/test.db?vfs=mvcc" +
+		"&_pragma=busy_timeout(10000)"
+	createDB(t, name)
+	testParallel(t, name, iter)
+	testIntegrity(t, name)
+}
+
 func Test_adiantum(t *testing.T) {
 	if !vfs.SupportsFileLocking {
 		t.Skip("skipping without locks")
@@ -312,6 +329,16 @@ func Benchmark_memdb(b *testing.B) {
 	testParallel(b, name, b.N)
 }
 
+func Benchmark_mvcc(b *testing.B) {
+	mvcc.Create("test.db", "")
+	name := "file:/test.db?vfs=mvcc" +
+		"&_pragma=busy_timeout(10000)"
+	createDB(b, name)
+
+	b.ResetTimer()
+	testParallel(b, name, b.N)
+}
+
 func createDB(t testing.TB, name string) {
 	db, err := sqlite3.Open(name)
 	if err != nil {