Bean比较的单元测试框架

Question

Is there any good framework for comparing whole objects?

now i do

assertEquals("ha@gmail.com", obj.email);
assertEquals("5", obj.shop);

if bad email is returned i never get to know if it had the right shop, i would like to get a list of incorrect fields.

Answer 1

Going with the 1 test, 1 assert line of thinking if you has each assert in its own test you would know if one or both of these had failed by the fact that there were 1 or 2 failing tests.

@Test
public void TestEmail()
{
    obj = GetTestObject();
    assertEquals("ha@gmail.com", obj.email);
}

@Test
public void TestShop()
{
    obj = GetTestObject();
    assertEquals("5", obj.shop);
}

obviously you need to move the setup of the object into a method ot have it performed in the test set up method and have it a class variable.

If you actually want to test if all properties are set in a single test:

@Test
public void TestAllProperties()
{
    obj = GetTestObject(); 
    bool testResult=true;
    string failureString;
    if "ha@gmail.com".equals( obj.email) == false
    {
         testResult=false;
         failureString+="email was different";
    }
    if "5".equals( obj.shop) == false
    {
         testResult=false;
         failureString+="shop was different";
    }
    assertTrue(testResult,failurestring);
}

but I'm not sure what this gives you really.

But if you really want to compare the whole objects equality then override the equals method (not forgetting getHashCode too) and do your equality checking in there. after all that is what it is for...

If you want a list of incorrect fields you could make the equals method populate an internal list which you could query if the equality check failed, to get the list of failed fields the last time equality was checked. Don't really think that's a good idea though.

Answer 2

You can also implement the comparable interface.

http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Comparable.html

Answer 3

这对我有帮助， 如何测试复杂对象图的相等性？

Answer 4

I would go for hamcrest matchers. They allow me to write code like this:

assertThat(obj, hasProperty("email", equalTo("ha@gmail.com")));

Answer 5

如果要测试对象相等性，那么肯定需要实现equals（）并使用assertEquals（）进行测试，否则Sam是正确的，每个测试一个声明