Guo Liang
School of Computing
National University of Singapore

 Testing – an essential step of development
 Organized as test cases for different components
 Selectively executed
– Test cases must be independent
 We are going to identify dependent test cases and discuss the solution

 Use JSlice to find dependence between test cases of JMeter
 JMeter test cases based on JUnit
 Execute JUnit for execution of JMeter test cases

 Dynamic slicing tool for Java
 Another Java virtual machine
– Use it to execute Java program and to slice
 Compatible with Java 1.4
 Available on Linux

 Server: modelchk.ddns.comp.nus.edu.sg
 ID/password: sent
 Connect using SSH

 Copy the folder /usr/local/slicing on the server
 Put under the same path in your own box
 Tested on Fedora Core 3 and 4 only

 A unit testing framework
 Test case template class provided
 Application test cases extending template class

 Java based application
 Functional and performance evaluation
 Test cases provided by developer for unit testing

Slice
JSlice
Slicing Result
Execute
Trace
The Java Program
JUnit
Call test case methods using reflection
JMeter test cases

 Method criterion
– (class, method)
– All statements executed between method entry and exit
 Specified in file:
–
–
Number_of_criteria
Class_name_1 method_name_1
–
–
Class_name_2 method_name_2
…

 A set of statements
– The criterion control/data dependent on
 In result file:
– Class name 1
– Line number 1
– Class name 2
–
–
Line number 2
…

 Navigate to JMeter home folder
 Execute
– sh runtest.sh criteria sliceresult
 The slice result is saved in sliceresult

 8 test cases shown in JMeterTestSuite.java
 Each test case may have several single tests
 All methods within the test case class are considered as part of the test case
 Report dependence between test cases, not between single tests
 You may modify JMeter and its test cases





 public class HelloWorld extends TestCase { public void setUp() { … } public void testAddition() { … } public void testMultiplication() { … } public void tearDown() { … }
 }



A  B
– Test case B is control / data dependent on test case A
A common case
– A global variable v defined during A while used during B
Execution sequence


 Real test case dependence
–
Removing A, B’s behavior is different
– The variable is in the application
 Other test case dependence
– Removing A does not affect B
– The variable is in Java library

 Find all test case dependence
 Identify real dependence
 State the reason and solution