On 2/14/2017 4:11 PM, VikramSrinivasan Venkatakrishnan wrote:
I have got the part with how the Mocking works, it's just that I am
trying to understand how to refactor a code by using Dependency
injection . My question is , even if there is dependency injection in
a class A where the injected object O is passed to it's constructor ,
The object O should be created in some X class so it can be injected
to A's constructor or set in a setter method. Now does that mean we
can't unit test that X class mocking this O object because we are
creating a new instance of O there ?
Good question. If the X does not use object O in its logic, in other
words, it does not
call the method of the O, there is no need to mock the behavior of O,
hence injecting
O or creating O does not have any consequence to the unit testing of X.
-S
Thanks,
Vikram
On Tue, Feb 14, 2017 at 12:25 PM, Sang Shin <[email protected]
<mailto:[email protected]>> wrote:
I made a bit confusing statement at the end. I clarified a bit.
But lets say the Person object is created in a Request Handler
class. While testing RequestHandler we wont be able to mock the
objects right ? I hope you got my question. How do we handle this ?
You do mocking only during testing. The code below is in
non-testing (production)
environment and has nothing to do with testing. (In fact, even
if you do not
have any dependency injection scheme mentioned above, you can
still inject
dependency to the target class.)
I meant to say "(In fact, even if you do not
have any dependency injection scheme mentioned above, you can
still inject
dependency to the target class via mocking.)" In other words,
even if you
do not have the constructor method in which Address object is passed
as a constructor argument, you can still inject Address object to the
Person object via @InjectMocks. Of course, if you do this, the
production
code will not work. :-)
-Sang
I will demonstrate this during our March 1st
codecamp if you want.
-S
RequestHandler.java
public void process (Person person){
Address address = new Address;
person = new Person (address);
person.getPersonAddressInfo();
}
Thanks,
Vikram
On Mon, Feb 13, 2017 at 6:58 PM, VikramSrinivasan
Venkatakrishnan <[email protected]
<mailto:[email protected]>> wrote:
Please assist with my below question.
Let's say we are refactoring the Person class.
Before Person class:
Person.java has a method ,
public String getPersonAddressInfo(){
Address address = new Address ();
return address.getInfo();
}
After refactor Person class:
@Autowired
Address address;
public String getPersonAddressInfo(){
return address.getInfo();
}
Now , if we write a junit as below, mocking the address object,
@Mock
Address address;
@Inject Mock
Person person;
@setup{ required code}
@Test public void
should_return_adress_info_as_something(){
Mockito.when(address.getInfo()),thenReturn("Westbrough,MA");
assertThat(person.getPersonAddressInfo,
equalTo("Westborough,MA"));
}
The method should_return_adress_info_as_something works only
for the After class and not Before class. Why is this the
case ? Is it because we are creating a new object in the
Before Person Class ?
Now, in the After class example that was given, let's say my
prod app is not on spring framework , how would i get an
instance of my address object ?
Kindly assist.
Thanks,
Vikram
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Sang Shin,[email protected]
<mailto:[email protected]>
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<http://www.linkedin.com/in/javapassion> (Linkedin)
http://twitter.com/javapassion (Tweeter)
Life is worth living... with Passion!
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http://twitter.com/javapassion (Tweeter)
Life is worth living... with Passion!
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