@Test public void testAddHighScore() { plant.setHighScores(new ArrayList<HighScore>()); HighScore newHighScore = new HighScore("Bob", 2000); presenter.addHighScore(newHighScore); List<HighScore> highScores = plant.getHighScores(); // expected List<HighScore> expected = new ArrayList<HighScore>(); expected.add(newHighScore); assertEquals("Result", expected, highScores); }