func (db *MockDB) ForceError(err error) {
	db.err = err
}
ForceError forces MockDB to return err on all methods that return an error.
package db
import "time"
type MockDB struct {
	installations map[int]GHInstallation  
	err           error
	Tools         []Tool
}
var _ DB = (*MockDB)(nil)
func NewMockDB() *MockDB {
	return &MockDB{
		installations: make(map[int]GHInstallation),
	}
}