Unit Test Candidate Solutions discusses various techniques for unit testing including: - Using mock environments to isolate tests and focus on single responsibilities - Preparing test data, files, and mock objects to provide context for developers - Verifying XML output using techniques like XPath, XMLUnit, and REXML - Mocking domain logic using libraries like EasyMock, jMock, and Mockito - Employing BDD specifications styles for more readable test code

1. Unit Test Candidate Solutions
Xuefeng.Wu 2012.05

2. Types of Tests

3. Types of Tests
use mock environment : isolation
single responsibility
use simulation 3rd applications,
system ,drivers
use real 3rd applications, system ,
drivers

4. Test context
CSDM
CSDM Demo,
CSDM
CSDM Service
Controller
Soap services
Domain Manager
Applications-
Business logic
2D etc, Model DAO Files
Jetty managers
Drivers

5. Test Targets

6. Technology Problems
• Environment and Context for developer
• Test database prepare for developer
• Test sample files prepare for developer
• XML String parameter in service for soap services test
• XML verify for soap services test
• Mock Object for domain logic test
• Model Date verify for domain logic test
• Files verify for domain logic test
• Notification verify for domain logic test
• Unit testing styles for better test code

7. Test database prepare
• DB Unit/ unitils
• Derby backup, restore on line
• Derby date file recovery with RAM Disk

8. Test database prepare
• Baseline data
• Each Test data is individual and isolation

9. DB Unit
• DbUnit has the ability to export and import
your database data to and from XML datasets.
public DBUnitSampleTest(String name) { super( name );
System.setProperty( PropertiesBasedJdbcDatabaseTester.DBUNIT_DRIVER_CLASS, "org.apache.derby.jdbc.ClientDriver" );
System.setProperty( PropertiesBasedJdbcDatabaseTester.DBUNIT_CONNECTION_URL, "jdbc:derby://localhost:1527/pas;create=true" );
}
protected IDataSet getDataSet() throws Exception {
return new FlatXmlDataSetBuilder().build(new FileInputStream("D:/Test/pas.xml"));
}
protected DatabaseOperation getSetUpOperation() throws Exception {
return DatabaseOperation.REFRESH;
}
protected DatabaseOperation getTearDownOperation() throws Exception {
return DatabaseOperation.NONE;
}
Perform setup of stale data once for entire test class or test suite

10. Derby backup, restore on line
String dbURL = "jdbc:derby:salesdb;restoreFrom=D:/dbbackups/salesdb";
Connection conn = DriverManager.getConnection(dbURL);

11. Derby date file recovery
• Hey! We use derby!
• Use Embedded Derbey
• Restore data files which in RAM Disk
<property name="hibernate.connection.url">
jdbc:derby:database/pas;create=true
</property>
<property name="hibernate.connection.driver_class">
org.apache.derby.jdbc.EmbeddedDriver
</property>

12. Test sample files prepare
• Dicom files,images,3D files
• Custom file providers

13. XML String parameter in service
• Soap service is all about xml string in and out
• But it's not easy to provide XML format
string in Java.

14. Java StringBuffer
String buildXML() {
StringBuffer sb = new StringBuffer();
sb.append("<EXPRESSION>");
sb.append(" <EQUAL>");
sb.append(" <IDENT>x</IDENT>");
sb.append(" <PLUS>");
sb.append(" <INT>3</INT>");
sb.append(" <TIMES>");
sb.append(" <INT>4</INT>");
sb.append(" <INT>5</INT>");
sb.append(" </TIMES>");
sb.append(" </PLUS>");
sb.append(" </EQUAL>");
sb.append("</EXPRESSION>");
return sb.toString();
} // buildXML

15. Read xml file as input
readFileToString.java

16. Use Other Language raw string
val input = """
<trophy type="request" version="1.0">
<patient>
<parameter key="patient_id" value="" /> C (If patient_id and DPMS_id are both null, PAS shall set Patient=patient_internal_id and
<parameter key="dpms_id" value=""/> C (If both parameter are not null, use input value. Only above two conditions, others will be
<parameter key="first_name" value=""/> O
<parameter key="last_name" value=""/> O
<parameter key="middle_name" value=""/> O
<parameter key="prefix" value=""/> O
<parameter key="suffix" value=""/> O
<parameter key="birth_date" value=""/> O ("yyyy-MM-dd")
<parameter key="sex" value=""/> O (male,female,other)
<parameter key="pregnancy" value=""/> O (not pregnant,possibly pregnant,definitively pregnant,unknown) empty string means not app
<parameter key="insurance_number" value=""/> O <parameter key="address" value=""/> O
<parameter key="town" value=""/> O
<parameter key="postal_code" value=""/> O
<parameter key="cellular_phone" value=""/> O
<parameter key="home_phone" value=""/> O
<parameter key="work_phone" value=""/> O
<parameter key="comments" value=""/> O
<parameter key="email" value=""/> O
<parameter key="photo" value=""/> O
<parameter key="kdis6_patient_directory" value=""/> O (used for import kdis6 images)
<parameter key="images_imported" value=""/> C ("true/false", must be pair with kdis6_patient_directory)
</patient>
</trophy>
"""

17. XML verify
• The soap service output is xml string
• You can use contains to verify simple value
• But not easy to verify specific value

18. XmlUnit
• XML can be used for just about anything so
deciding if two documents are equal to each
other isn't as easy as a character for character
match
public void testXPathValues() throws Exception {
String myJavaFlavours = "<java-flavours><jvm current='some platforms'>1.1.x</jvm>" +
"<jvm current='no'>1.2.x</jvm><jvm current='yes'>1.3.x</jvm>" +
"<jvm current='yes' latest='yes'>1.4.x</jvm></java-flavours>";
assertXpathEvaluatesTo("1.4.x", "//jvm[@latest='yes']", myJavaFlavours);
assertXpathEvaluatesTo("2", "count(//jvm[@current='yes'])", myJavaFlavours);
assertXpathValuesEqual("//jvm[4]/@latest", "//jvm[4]/@current", myJavaFlavours);
assertXpathValuesNotEqual("//jvm[2]/@current", "//jvm[3]/@current", myJavaFlavours);
}

19. Scala XML
val ns = <foo><bar><baz/>Text</bar><bin/></foo>
ns "foo" // => <foo><bar>...</bar><bin/></foo>
ns "foo" "bar" // => <bar><baz/>Text</bar>
val ns = <foo id="bar"/>
ns "@id" // => Text(bar)

20. JRuby REXML
xml = File.read('posts.xml')
puts Benchmark.measure {
doc, posts = REXML::Document.new(xml), []
doc.elements.each('posts/post') do |p|
posts << p.attributes
End
}

21. Model Date verify
• After execute the method you want to know
every thing is correct.

22. Solutions
• DbUnit can also help you to verify that your
database data match an expected set of
values.
• Call hibernate Dao Directly
• Verify by other business method

23. Files verify
• Custom utile
• public static void checkDuplicateFiles(File dir)

24. Notification verify
• An ActiveMQ client utile
• It should run in other thread and subscript
before call method
• It should time out if no message received after
long time

25. Wait future notification
"There should have imageCreated notification after image is created " should {
" ok " in {
val srcPid = DataPrepare.createPatient
val msg = future(ActiveMQ.receive("topic.imageCreated"))
val imgId = DataPrepare.prepareImage(srcPid)._1 //wait a 3 second
awaitAll(3000,msg) foreach{ v => v match {
case Some(m) => { m.toString must contain (srcPid)
m.toString must contain (imgId) }
case None => 1 must_== 2 }
}
}
}

26. Mock Object

27. EasyMock
public void testTransferShouldDebitSourceAccount(){
AccountController controller = new AccountController();
Account from = createMock(Account.class)
Account to = createMock(Account.class)
from.debit(42);
replay(from);
replay(to);
controller.transfer(from,to,42);
verify(from);
}

28. jMock
Mockery context = new Mockery();
public void testTransferShouldDebitSourceAccount(){
AccountController controller = new AccountController();
Account from = context.mock(Account.class)
Account to = context.mock(Account.class)
context.checking(new Expectations() {{
oneOf(from).debit(42);
}}
controller.transfer(from,to,42);
context.assertIsSatisfied();
}

29. mockito
public void testTransferShouldDebitSourceAccount(){
AccountController controller = new AccountController();
Account from = mock(Account.class)
Account to = mock(Account.class)
controller.transfer(from,to,42);
verify(from).debit(42);
}

30. public void testTransferShouldDebitSourceAccount(){
AccountController controller = new AccountController();
Account from = createMock(Account.class)
Account to = createMock(Account.class)
from.debit(42);
replay(from);
replay(to);
controller.transfer(from,to,42);
verify(from);
}
Mockery context = new Mockery();
public void testTransferShouldDebitSourceAccount(){
AccountController controller = new AccountController();
Account from = context.mock(Account.class)
Account to = context.mock(Account.class)
context.checking(new Expectations() {{
oneOf(from).debit(42);
}}
controller.transfer(from,to,42);
context.assertIsSatisfied();
}
public void testTransferShouldDebitSourceAccount(){
AccountController controller = new AccountController();
Account from = mock(Account.class)
Account to = mock(Account.class)
controller.transfer(from,to,42);
verify(from).debit(42);
}

31. Mock what?

32. Environment and Context
Name Location Interaction
DB Internal JDBC connect with hibernate
ActiveMQ Internal socket,ActiveMQ library
Demo External cmd,socket
Config file External read/write file
Registration table External system tool,reg
Schedule External trigger
2D External cmd,socket
Object Applications External cmd

33. Unit testing styles
• BDD
• Better test code
• It’s better not only for developer. If P.O. can
read our test code is better
• The test code should like specifics

34. Traditional Status assert test
public void testAdd() {
int num1 = 3;
int num2 = 2;
int total = 5;
int sum = 0;
sum = Math.add(num1, num2);
assertEquals(sum, total);
}

35. BDD specifications style
class HelloWorldSpec extends Specification {
"The 'Hello world' string" should {
"contain 11 characters" in {
"Hello world" must have size(11)
}
"start with 'Hello'" in {
"Hello world" must startWith("Hello")
}
"end with 'world'" in {
"Hello world" must endWith("world")
}
}
"The sum" should {
“ equals total " in {
val num1 = 2,num2 = 3, total = 5
Math.add(num1, num2) must equalsTo(total)
}
}
}