JavaScriptã§åä½ãã¹ãããéã¯ãJestã使ãã®ãããã¡ã¯ãã«ãªã£ã¦ãã¦ãã¾ãã åä½ãã¹ãã§ã¯ãé¢é£ããã¢ã¸ã¥ã¼ã«ãã¢ãã¯ã«ãã¦ãã¹ããããã¨ãå¤ãã§ããã ããã§ã¯ãJestã®ã¢ãã¯ã®æ©è½ã¨ä½¿ãæ¹ãã¦ã¼ã¹ã±ã¼ã¹å¥ã«èª¬æãã¾ãã ã¯ã©ã¹ã®staticãªã¡ã½ãããã¢ãã¯ããã ä¾ãã°ãèªåã®é¢æ°å ã§Date.now()ã使ã£ã¦æéãåå¾ãã¦ããã¨ããã¹ããå®è¡ãããã³ã«å¤ãç°ãªãããããã¹ãããã¾ããããªããã¨ãããã¾ãã ãã®ãããªå ´åãjest.spyOnã使ãã¾ãã spyOnã使ããã¨ã§ããç¹å®ã®æéãè¿ããã¨ãã§ããããã«ãªãã¾ãã class Test { func() { return Date.now(); } } describe("Date#now", () => { it("spyOnã使ãã¨å¥½ããªæéã«åºå®ãããã¨ãã§ãã", () => { const

{{#tags}}- {{label}}
{{/tags}}