Learn how to prevent more Java defects by applying static code analysis, flow analysis, unit testing, and runtime error detection in concert.

1. Prevent All Java Software Defects
with a Single Tool
2010
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2. Automated Analysis Techniques
Application Tracing for Unit Tests
Pattern-Based Static Code Analysis
Runtime Error Detection
Automated Unit Test Generation
Data Flow Analysis
Regression Testing
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3. Introducing the Java Web App
JPetStore Java EE Tutorial
Spring-Based
HSQL Database
JSP Web Interface
Apache Tomcat
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4. The Problem Report
Similar Items not Aggregating in Shopping Cart
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the cart
Add the same
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Expected: a
single line item
with quantity 2
Found: 2 line
items each with
quantity 1
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5. Application Tracing for Unit Tests
Record internal method calls inside the running
application when the problem occurs
Replicate the problem in a JUnit test
Alter the JUnit test to assert the correct behavior
Now possible solutions can be tested quickly
without redeploying the web application
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6. Pattern-Based Static Analysis
Quick scan to list possible problems
Fixing violations prevents certain classes of
errors
Each source file is analyzed separately
Static analysis categories include:
Logical Errors
API Misuse
Typographical Errors
Security
Threads and Synchronization
Performance and Optimization
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7. Runtime Error Detection
Check for anti-patterns at runtime in the
application
Violations are presented in the context of real-
world data values to stress their importance
Runtime error categories include:
Threads and Synchronization
Performance and Optimization
Application Crashes
Functional Errors
Security
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8. Automated Unit Test Generation
Test code branches not covered by the
application-level test
Combine these unit tests with runtime error
detection to check the new execution paths
Build a baseline regression test suite
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9. Data Flow Analysis
Simulate hypothetical execution paths
Detect possible errors along those paths
Data flow analysis error categories include:
Exceptions
Optimization
Resource Leaks
API misuse
Security
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10. Regression Testing
Capture current behavior of covered code paths
Whether the current behavior is right or wrong
Alert when code modifications cause a change in
behavior
Developers can then mark JUnit assertions as
correct behavior to increase the severity if those
assertions fail in the future
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11. Java Software Problems
Functional
Thread concurrency
Performance
Regression
Requirement Testing
Code Review
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12. Comparable Tools
Static Analysis
Data Flow Analysis
Unit Test Framework (with Test Engineer)
Profiler
QA Functional Tester
Code Review
Code Metrics Measurement
Code Duplication Detection
Task Management
Parasoft Proprietary and Confidential