2.  Definition of Software Testability.
 Why Testability Matters?
 Design for Testability!
 What Makes an SUT Testable?
 Testability-Explorer Tool
 Testability Report.
 Conclusion.
 References.

3.  Testability: The ease with which a computer program
can be tested.
 ISO: Defines testability “Attributes of software that bear
on the effort needed to validate the software product”.
 IEEE: Defines testability as the degree to which a
system or component facilitates the establishment of test
criteria and performance of tests to determine whether
those criteria have been met.

4.  Economics
 Sooner is better.
 Higher testability  More better tests.
 Lower testability  Fewer weaker tests.
Poor Ineffective Sever
Testability Testing Penalties

7.  Controllability
 The better we can control it, the more the testing can be
optimized.
 Observability
 What you see is what can be tested.
 Availability
 To test it, we have to get at it.
 Simplicity
 The simpler it is, the less there is to test.

8.  Stability
 The fewer the changes, the fewer the disruptions to testing.
 Information
 The more information we have, the smarter we will test.
 Operability
 The better it works, the more efficiently it can be tested.

9.  What is it?
 Testability-Explorer can be used:
1. As a learning tool.
2. As a part of your code analysis-toolset.
3. As a tool which can be added into continuous integration
that can enforce testable code.
 Currently the tool compute:
1. Total Recursive Cyclomatic Complexity.
2. Global Mutable State.

13. Class: com.google.test.metric.method.op.stack.Transform

14.  Testability is an important attribute for software under
test.
 Minimize the cost and effort needed to create test cases.
 helps to produce high quality product.

15.  “A Measurement Framework for Object-Oriented
Software Testability” by(Samar Mouchawrab, Lionel
C. Briand, Yvan Labiche) technical report Published on
April 2005.
 “Methods for Increasing Software Testability”
by(Birgitta Lindstrom, Jonas Mellin, and Sten Andler).
 “Improving Software Testability” by(George Yee) Jan
14, 2000.
 “Analyzing Testability on Data Flow Designs” by(Yves
Le Traon, Farid Ouabdesselam, andChantal Robach).
 “Heuristics of Software Testability” by(James Bach).

16.  “The Benefit of Software Testability” by(Sarah
Murphy) Last updated Wednesday, 14 October 2009
09:45.
 “Testing Testability” by(Ipsita Chatterjee)
www.stickyminds.com Last entered 22-5-2012 08:55.
 “Testability: Factors & Strategy” by(Robert V. Binder)
Google Test Automation Conference Hyderabad
October 28, 2012.
 “Reviewing Software Artifacts for Testability”
by(Stefan Jungmayr).
 http://code.google.com/p/testability-explorer/