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I wrote a mock framework last weekend, to address in internal unit testing problems
in my current job. The module i worked on is a small piece of a complicated system in world's biggest online retail company, and it depends heavily on downstream services. basically no unit test code at all in the original system.

Mock object helps but it is not easy to use. Finally i decided to create a new one, which
1. define testing data in the separate xml file [ promote reuse]
2. define mock contracts in the separate xml file [ promote reuse and easy understanding]

SecondMock 1.0 Readme

The SecondMock allows to generate Mock Objects for classes and interfaces, with mocked behavior defined in the contracts.

Requirements
The SecondMock requires
Java 5 or above,
cglib 2.1
asm
objenesis
beanutils

Usage
To generate Mock Objects for classes and interfaces, use
SecondMock mock = new SecondMock(); mock.registerDataFile("testdata-1.xml");

To register test data which can be reused in different test plans.
You will then create a mock
ToMock service = mock.createSecondMock("name", ToMock .class, MockPolicy.NORM, "testplan-1.xml");
or
ToMock service = mock.createSecondMock(ToMock .class, "testplan-1.xml");
with given test plan which defines the test contracts.
Here ToMock can be interface or class.

How to plugin different test plan implementation?
Different test plan implementation strategies can be plugin.
in the test plan xml file
<TestPlan name="test" impClass="org.second.life.mock.BaseTestPlan">
impClass must implement TestPlan interface. Default implementation, if not specified, will be BaseTestPlan.

How to define the test data?
Test data is defined in the seperate xml file to promote data reuse.
<dataset namespace="test">
<objects class="org.second.life.mock.Employee">
<object id="foo" singleton="true">
<property name="name"><objectref refid="1"/></property>
<property name="alias" type="List">I, am , Fine</property>
<property name="personalities" type="Map">fishing,good,boxing,hate,travel,ok</property>
</object>
</objects>
<objects class="org.second.life.mock.Name">
<object id="1" singleton="true">
<constructor>
<property name="firstName" type="string">Brian</property>
<property name="lastName" type="string">King</property>
</constructor>
</object>
<object id="2" singleton="true">
<constructor>
<property name="firstName" type="string">Brian</property>
<property name="lastName" type="string">King</property>
</constructor>
</object>
</objects>
</dataset>

The object can be referenced accross namespace

How to define the contracts
<TestPlan name="test" impClass="org.second.life.mock.BaseTestPlan">
<!-- it should be implementation dependent? -->
<contract-list>
<contract>
<!-- not used yet -->
<precondition>
</precondition>
<method name="reverse"/>
<input>
<parameter name="input" type="string" value="123"/>
</input>
<return>
<!-- refid can be from input parameter or data section -->
<!-- <objct refid=/> -->
<!-- or return as name value pair -->
<result name="input" type="string" value="321"/>
</return>
</contract>
<contract>
<!-- not used yet -->
<precondition>
</precondition>
<method name="reverse"/>
<input>
<parameter name="input" type="string" value="111"/>
</input>
<return>
<!-- refid can be from input parameter or data section -->
<!-- <objct refid=/> -->
<!-- or return as name value pair -->
<exception class="org.second.life.mock.DummyException" message="i am foo" errorcode=""/>
</return>
</contract>
<contract>
<!-- not used yet -->
<method name="getEmployee"/>
<input>
<parameter name="name"><objectref refid="test.1"/></parameter>
</input>
<return>
<result>
<objectref refid="test.foo"/>
</result>
</return>
</contract>
</contract-list>
</TestPlan>


Limitations

Final methods cannot be mocked. If called, their normal code will be executed.
Class instantiation is performed using
Objenesis.
Supported JVMs are listed
here.

Authors
SecondMock is written by Hanning Ni [watchsound@gmail.com]
Mock idea and some implementation initially from Easy Mock [Henri Tremblay]

The Project Hompage
code is available at
http://jtestframework.sourceforge.net/

Release Notes

Initial Release 1.0
Seperate test data and test behavior

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Replies to This Discussion

Hi WatchSound. I really like this framework. Also, thank you for introducing me to the Objenesis library. This is very useful.
Cameron Souza said:
Hi WatchSound. I really like this framework. Also, thank you for introducing me to the Objenesis library. This is very useful.

Thank you for your word. Actually i steal Objenesis concept from EasyMock...
Aloha WatchSound. Thank you for telling us about your framework. I like it! It would be nice if you could define the test data in SDL, which is much terser and easier to read for this type of data definition. Example:
object class="com.acme.data.Person" employee=true age=28 {
property "Projects" type="List" {
"Ooi Social Platform"
"SDL/Swing"
}
}
We have a few test related classes I would be happy to contribute to this project including a test data generator (randomData.createLastName(), randomData.createPhoneNumber(), randomData.createPassword(PasswordStrength.STRONG), etc.) that would make generating the test data file easier.
Daniel Leuck said:
Aloha WatchSound. Thank you for telling us about your framework. I like it! It would be nice if you could define the test data in SDL, which is much terser and easier to read for this type of data definition. Example:
object class="com.acme.data.Person" employee=true age=28 {
property "Projects" type="List" {
"Ooi Social Platform"
"SDL/Swing"
}
}
We have a few test related classes I would be happy to contribute to this project including a test data generator (randomData.createLastName(), randomData.createPhoneNumber(), randomData.createPassword(PasswordStrength.STRONG), etc.) that would make generating the test data file easier.

Hi Dane,

Thank you for taking time to read my post. It will be a great improvement for SecondMock to use SDL to generate testing data, because one drawback of the original approach is that user has to write long xml content before run even a simple testing case.
Would you mind if I add your name to the project so you can integrate current code with SDL?
Have Fun

-WatchSound
WatchSound: Would you mind if I add your name to the project so you can integrate current code with SDL?

Feel free to add my name. Note that I'm currently working on Ooi (our new social networking company's product), so it will probably be a while. I'm also hoping to release SDL 1.1 today or tomorrow.

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