t - fix type issue in tests so ng t can run
t - fix type issue in tests so ng t can run

emilybache/Tennis-Refactoring-Kata,emilybache/Tennis-Refactoring-Kata,emilybache/Tennis-Refactoring-Kata,emilybache/Tennis-Refactoring-Kata,emilybache/Tennis-Refactoring-Kata,emilybache/Tennis-Refactoring-Kata,emilybache/Tennis-Refactoring-Kata,emilybache/Tennis-Refactoring-Kata,emilybache/Tennis-Refactoring-Kata,emilybache/Tennis-Refactoring-Kata,emilybache/Tennis-Refactoring-Kata,emilybache/Tennis-Refactoring-Kata,emilybache/Tennis-Refactoring-Kata,emilybache/Tennis-Refactoring-Kata,emilybache/Tennis-Refactoring-Kata,emilybache/Tennis-Refactoring-Kata