asp.net – 单元/集成测试,它们应该是多么精细？

因此,当我在数据输入表单上测试验证逻辑时,我是否应该编写一个触发每个验证错误的测试(即需要字段x),或者对每个应该抛出的验证错误进行单独测试通过表格.这只是一个样式问题,还是有正确的理由来编写几个测试而不是一个能够验证我的验证逻辑的所有可能组合的测试？

Psuedo代码：

[Test]
    public void Validation()
    {
       //Do some stuff to test that username is required.
       Assert.AreEqual(true,ie.ContainsText("Username is required.");

       //Do some stuff to test that passwword is required.
       Assert.AreEqual(true,ie.ContainsText("Password is required.");
    }

与

[Test]
public void ValidateUserName()
{
   //Do some stuff to test that username is required.
   Assert.AreEqual(true,ie.ContainsText("Username is required.");
}

[Test]
public void ValidatePassword()
{
   //Do some stuff to test that passwword is required.
   Assert.AreEqual(true,ie.ContainsText("Password is required.");
}