CS4272 Hardware-Software Co-design
Assignment 2
Guo Liang
School of Computing
National University of Singapore
Testing



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
Tools Involved



Use JSlice to find dependence between test
cases of JMeter
JMeter test cases based on JUnit
Execute JUnit for execution of JMeter test
cases
JSlice


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
Access



Server: modelchk.ddns.comp.nus.edu.sg
ID/password: sent
Connect using SSH
Self Access



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
JUnit



A unit testing framework
Test case template class provided
Application test cases extending template
class
JMeter



Java based application
Functional and performance evaluation
Test cases provided by developer for unit
testing
Overview
The Java Program
JUnit
Execute
JSlice
Trace
Call test case
methods using
reflection
Slice
JMeter test
cases
Slicing Result
Slicing Criterion

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
…
Slicing Result

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
…
Execute JSlice


Navigate to JMeter home folder
Execute
–

sh runtest.sh criteria sliceresult
The slice result is saved in sliceresult
JMeter Test Cases





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
A Sample Test Case





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public class HelloWorld extends TestCase {
public void setUp() { … }
public void testAddition() { … }
public void testMultiplication() { … }
public void tearDown() { … }
}
Test Case Dependence

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
Two Types of A  B

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
The Assignment



Find all test case dependence
Identify real dependence
State the reason and solution