JUnit断言:在浮点数之间进行断言 [英] JUnit assertions : make the assertion between floats

问题描述

我需要比较两个值:一个是字符串，另一个是float 因此，我将字符串转换为float，然后尝试调用assertEquals(val1,val2)，但这未经授权，我猜assertEquals不接受float作为参数.

I need to compare two values : one a string and the other is float so I convert the string to float then try to call assertEquals(val1,val2) but this is not authorized , I guess that the assertEquals doesn't accept float as arguments.

在这种情况下，我的解决方案是什么?

What is the solution for me in this case ?

推荐答案

您必须为Floats的断言提供一个增量:

You have to provide a delta to the assertion for Floats:

Assert.assertEquals(expected, actual, delta)

虽然delta是预期值与实际值之间的最大差值(delta)，但两个值仍被视为相等.

While delta is the maximum difference (delta) between expected and actual for which both numbers are still considered equal.

Assert.assertEquals(0.0012f, 0.0014f, 0.0002); // true
Assert.assertEquals(0.0012f, 0.0014f, 0.0001); //false

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