Examples, tests, max size.

tests/db_test.go

@@ -10,10 +10,12 @@ import (
 )
 
 func TestDB_memory(t *testing.T) {
+	t.Parallel()
 	testDB(t, ":memory:")
 }
 
 func TestDB_file(t *testing.T) {
+	t.Parallel()
 	testDB(t, filepath.Join(t.TempDir(), "test.db"))
 }
 
@@ -21,12 +23,11 @@ func TestDB_VFS(t *testing.T) {
 	sqlite3vfs.Register("memvfs", sqlite3vfs.MemoryVFS{
 		"test.db": &sqlite3vfs.MemoryDB{},
 	})
+	defer sqlite3vfs.Unregister("memvfs")
 	testDB(t, "file:test.db?vfs=memvfs&_pragma=journal_mode(memory)")
 }
 
 func testDB(t *testing.T, name string) {
-	t.Parallel()
-
 	db, err := sqlite3.Open(name)
 	if err != nil {
 		t.Fatal(err)

tests/parallel/parallel_test.go

@@ -43,6 +43,7 @@ func TestMemory(t *testing.T) {
 	sqlite3vfs.Register("memvfs", sqlite3vfs.MemoryVFS{
 		"test.db": &sqlite3vfs.MemoryDB{},
 	})
+	defer sqlite3vfs.Unregister("memvfs")
 
 	name := "file:test.db?vfs=memvfs" +
 		"&_pragma=busy_timeout(10000)" +

tests/vfs_test.go

@@ -0,0 +1,94 @@
+package tests
+
+import (
+	"errors"
+	"strings"
+	"testing"
+
+	_ "embed"
+
+	"github.com/ncruces/go-sqlite3"
+	_ "github.com/ncruces/go-sqlite3/driver"
+	_ "github.com/ncruces/go-sqlite3/embed"
+	"github.com/ncruces/go-sqlite3/sqlite3vfs"
+)
+
+//go:embed testdata/test.db
+var testdata string
+
+func TestMemoryVFS_Open_notfound(t *testing.T) {
+	sqlite3vfs.Register("memory", sqlite3vfs.MemoryVFS{
+		"test.db": &sqlite3vfs.MemoryDB{},
+	})
+	defer sqlite3vfs.Unregister("memory")
+
+	_, err := sqlite3.Open("file:demo.db?vfs=memory&mode=ro")
+	if err == nil {
+		t.Error("want error")
+	}
+	if !errors.Is(err, sqlite3.CANTOPEN) {
+		t.Errorf("got %v, want sqlite3.CANTOPEN", err)
+	}
+}
+
+func TestMemoryVFS_Open_journal(t *testing.T) {
+	sqlite3vfs.Register("memory", sqlite3vfs.MemoryVFS{
+		"test.db": &sqlite3vfs.MemoryDB{},
+	})
+	defer sqlite3vfs.Unregister("memory")
+
+	db, err := sqlite3.Open("file:test.db?vfs=memory")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer db.Close()
+
+	err = db.Exec(`CREATE TABLE IF NOT EXISTS test (col)`)
+	if err == nil {
+		t.Error("want error")
+	}
+	if !errors.Is(err, sqlite3.CANTOPEN) {
+		t.Errorf("got %v, want sqlite3.CANTOPEN", err)
+	}
+}
+
+func TestMemoryVFS_Open_errors(t *testing.T) {
+	sqlite3vfs.Register("memory", sqlite3vfs.MemoryVFS{
+		"test.db": &sqlite3vfs.MemoryDB{MaxSize: 65536},
+	})
+	defer sqlite3vfs.Unregister("memory")
+
+	db, err := sqlite3.Open("file:test.db?vfs=memory&_pragma=journal_mode(memory)")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer db.Close()
+
+	err = db.Exec(`CREATE TABLE IF NOT EXISTS test (col)`)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = db.Exec(`INSERT INTO test VALUES (zeroblob(65536))`)
+	if err == nil {
+		t.Error("want error")
+	}
+	if !errors.Is(err, sqlite3.FULL) {
+		t.Errorf("got %v, want sqlite3.FULL", err)
+	}
+}
+
+func TestReaderVFS_Open_notfound(t *testing.T) {
+	sqlite3vfs.Register("reader", sqlite3vfs.ReaderVFS{
+		"test.db": sqlite3vfs.NewSizeReaderAt(strings.NewReader(testdata)),
+	})
+	defer sqlite3vfs.Unregister("reader")
+
+	_, err := sqlite3.Open("file:demo.db?vfs=reader&mode=ro")
+	if err == nil {
+		t.Error("want error")
+	}
+	if !errors.Is(err, sqlite3.CANTOPEN) {
+		t.Errorf("got %v, want sqlite3.CANTOPEN", err)
+	}
+}