[英]junit testing without static methods
我需要為各種功能創建測試,這些功能不是 static(不允許更改)。 例如
public Double average(int[] scores) {
int sum = Arrays.stream(scores).sum();
return (double) sum/scores.length;
}
測試:
public void testAverage (){
int[] scores = {25, 100, 90, 72};
Double expected = 59.25;
Double result = LogicProblems.average(scores);
assertEquals(expected, result);
}
接口: public Double average(int[] scores);
這樣做,我收到錯誤消息“無法從 static 上下文調用非靜態方法”
你能告訴我為什么上下文是 static,以及如何解決/使用它嗎?
由於您無法更改LogicProblems
的代碼,因此您需要在測試中實例化它:
public void testAverage (){
int[] scores = {25, 100, 90, 72};
Double expected = 59.25;
LogicProblems lp = new LogicProblemsImpl(); // Or better yet, in a @Before method
Double result = lp.average(scores);
assertEquals(expected, result);
}
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