Martin Monperrus University of Lille & Inria, France Antifragile Software and Genetic Improvement

19 Pages·2016·1.17 MB·English

Antifragile Software and Genetic Improvement
Martin Monperrus
University of Lille & Inria, France
CREST Open Workshop on Genetic Improvement
Jan 2016
1
Martin Monperrus, University of Lille & Inria, France

Exception Handling Analysis and Transformation Using Fault Injection: Study of
Resilience Against Unanticipated Exceptions (IST 2014)
try {
prepare_meringue()
add_cream()
make_balls()
add_chocolate_shavings()
}
catch (MissingChocolateEx e) {
use_nutella();
}
« Anticipated errors »
3
Martin Monperrus, University of Lille & Inria, France
Expected errors in test suites
Blue and white tests specify anticipated errors
White tests specify resilience
Test colors
●
– Pink
– Blue
- White
4
Martin Monperrus, University of Lille & Inria, France
Empirical results
100%
90%
80%
70%
60%
50%
white
40%
blue
30%
pink
20%
10%
0%
3950 2046 2031 481 406 339 191 135 100
5
Martin Monperrus, University of Lille & Inria, France
Our intuition:
simulating
unforeseen errors
by perturbing test
case execution
6
Martin Monperrus, University of Lille & Inria, France
Why ?
7
Martin Monperrus, University of Lille & Inria, France
Short circuit testing: Exception
injection in test suites
White test + throw new X() =
8
Martin Monperrus, University of Lille & Inria, France
Source-Independence
The try-catch blocks that keep the tests
passing under exception injection are
capable to handle unanticipated errors.
WWee ccaallll tthheemm ''''ssoouurrccee--iinnddeeppeennddeenntt''''..
Empirical assessment of resilience against
unforeseen errors
9
Martin Monperrus, University of Lille & Inria, France
Empirical Evaluation
45
40
35
30
25
nodne apgennodsteiqnute
20 aginndosetpiqeunedent
15
10
5
0
Commons-lang sonar core jbehave core sonar plugin api
shindig-java-gadgets commons-codec shindig-common joda time spojo core
10
Martin Monperrus, University of Lille & Inria, France