// 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{}) (database.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 := database.DriverDB{
DbType: dbType,
CreateDB: bogusCreateDB,
OpenDB: bogusCreateDB,
}
database.AddDBDriver(driver)
// Ensure creating a database with the new type fails with the expected
// error.
_, err := database.CreateDB(dbType, "createfailtest")
if err != openError {
t.Errorf("TestCreateOpenFail: 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 = database.OpenDB(dbType, "openfailtest")
if err != openError {
t.Errorf("TestCreateOpenFail: expected error not received - "+
"got: %v, want %v", err, openError)
return
}
}
// TestAddDuplicateDriver ensures that adding a duplicate driver does not
// overwrite an existing one.
func TestAddDuplicateDriver(t *testing.T) {
supportedDBs := database.SupportedDBs()
if len(supportedDBs) == 0 {
t.Errorf("TestAddDuplicateDriver: No backends to test")
return
}
dbType := supportedDBs[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{}) (database.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 := database.DriverDB{
DbType: dbType,
CreateDB: bogusCreateDB,
OpenDB: bogusCreateDB,
}
database.AddDBDriver(driver)
// Ensure creating a database of the type that we tried to replace
// doesn't fail (if it does, it indicates the driver was erroneously
// replaced).
_, teardown, err := createDB(dbType, "dupdrivertest", true)
if err != nil {
t.Errorf("TestAddDuplicateDriver: %v", err)
return
}
teardown()
}
func init() {
database.AddDBDriver(self)
}
func init() {
driver := database.DriverDB{DbType: "memdb", CreateDB: CreateDB, OpenDB: OpenDB}
database.AddDBDriver(driver)
}