java - 为什么在 JUnit 中不推荐使用 assertEquals(double,double)？

Question

我想知道为什么不推荐使用 assertEquals(double, double)。

我使用了 import static org.junit.Assert.assertEquals; 并且我使用了 JUnit 4.11。

下面是我的代码:

import org.junit.Test;
import static org.junit.Assert.assertEquals;


public class AccountTest {

@Test
public void test() {
    Account checking = new Account(Account.CHECKING);
    checking.deposit(1000.0);
    checking.withdraw(100.0);
    assertEquals(900.0, checking.getBalance());
   }
}

checking.getBalance() 返回一个 double 值。

可能出了什么问题？

Answer 1

由于 double 问题，它已被弃用。

如果您注意到，还有另一种方法 assertEquals(double expected, double actual, double delta) 允许 delta 精度损失。

JavaDoc :

Asserts that two doubles are equal to within a positive delta. If they are not, an AssertionError is thrown. If the expected value is infinity then the delta value is ignored.NaNs are considered equal: assertEquals(Double.NaN, Double.NaN, *) passes

...

delta - the maximum delta between expected and actual for which both numbers are still considered equal.