func init() {
// Register the driver.
driver := walletdb.Driver{
DbType: dbType,
Create: createDBDriver,
Open: openDBDriver,
}
if err := walletdb.RegisterDriver(driver); err != nil {
panic(fmt.Sprintf("Failed to register database driver '%s': %v",
dbType, err))
}
}
// TestAddDuplicateDriver ensures that adding a duplicate driver does not
// overwrite an existing one.
func TestAddDuplicateDriver(t *testing.T) {
supportedDrivers := walletdb.SupportedDrivers()
if len(supportedDrivers) == 0 {
t.Errorf("no backends to test")
return
}
dbType := supportedDrivers[0]
// bogusCreateDB is a function which acts as a bogus create and open
// driver function and intentionally returns a failure that can be
// detected if the interface allows a duplicate driver to overwrite an
// existing one.
bogusCreateDB := func(args ...interface{}) (walletdb.DB, error) {
return nil, fmt.Errorf("duplicate driver allowed for database "+
"type [%v]", dbType)
}
// Create a driver that tries to replace an existing one. Set its
// create and open functions to a function that causes a test failure if
// they are invoked.
driver := walletdb.Driver{
DbType: dbType,
Create: bogusCreateDB,
Open: bogusCreateDB,
}
err := walletdb.RegisterDriver(driver)
if err != walletdb.ErrDbTypeRegistered {
t.Errorf("unexpected duplicate driver registration error - "+
"got %v, want %v", err, walletdb.ErrDbTypeRegistered)
}
dbPath := "dupdrivertest.db"
db, err := walletdb.Create(dbType, dbPath)
if err != nil {
t.Errorf("failed to create database: %v", err)
return
}
db.Close()
_ = os.Remove(dbPath)
}
// TestCreateOpenFail ensures that errors which occur while opening or closing
// a database are handled properly.
func TestCreateOpenFail(t *testing.T) {
// bogusCreateDB is a function which acts as a bogus create and open
// driver function that intentionally returns a failure which can be
// detected.
dbType := "createopenfail"
openError := fmt.Errorf("failed to create or open database for "+
"database type [%v]", dbType)
bogusCreateDB := func(args ...interface{}) (walletdb.DB, error) {
return nil, openError
}
// Create and add driver that intentionally fails when created or opened
// to ensure errors on database open and create are handled properly.
driver := walletdb.Driver{
DbType: dbType,
Create: bogusCreateDB,
Open: bogusCreateDB,
}
walletdb.RegisterDriver(driver)
// Ensure creating a database with the new type fails with the expected
// error.
_, err := walletdb.Create(dbType)
if err != openError {
t.Errorf("expected error not received - got: %v, want %v", err,
openError)
return
}
// Ensure opening a database with the new type fails with the expected
// error.
_, err = walletdb.Open(dbType)
if err != openError {
t.Errorf("expected error not received - got: %v, want %v", err,
openError)
return
}
}