把 == 改为 .equals() ,因为字符串是对象,比较内容相等应该用 equals 方法。
改成这样:
assertTrue("14,testing the method toString()",
(athleteSix.getName() + "," + athleteSix.getScoreOne() + "," + athleteSix.getScoreTwo()
+ "," + athleteSix.getScoreThree()).equals("athleteSix,80.0,90.0,100.0") );