Evaluating code-based test-generator tools

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In recent years several tools have been developed to automatically select relevant test inputs from the source code of the system under test. However, each of these tools has different advantages, and there is little detailed feedback available on the actual capabilities of the various tools. We developed a framework to compare and evaluate such tools.

Software

Budapest, 26-28 October 2016
EVALUATING CODE-BASED TEST
INPUT GENERATOR TOOLS
Presented by Zoltan Micskei
© All rights reserved

$Code-based test generation 2 © All rights reserved int fun1(int a, int b){ if (a == 0){ printf(ERROR_MSG); return -1; } if (b > a) return b*a + 5; else return (a+b) / 2; } 1 2 3 4 # a b stm 1 0 * 1, 2 2 a!=0 b > a 3 3 a!=0 b =< a 4$

Code-based test generator tools
3 © All rights reserved
Detailed list of tools: http://mit.bme.hu/~micskeiz/pages/cbtg.html

Motivation
How can the different
test input generator tools
be compared and evaluated?
4 © All rights reserved

Core features
• Types, Operators
• Conditionals,
Loops
• Arrays, Functions
Basic
• Structure usage
• Nested
structures
• …
Structures
• Object usage
• Inheritance,
interfaces
• …
Objects
• Generic
functions
• Generic objects
• …
Generics
• Arithmetic,
Strings
• Collections
• …
Library
© All rights reserved

Extra features
• Stdin,
Properties
• Files, Sockets
Environment
• Threads, Locks
• Indeterminacy
Multi-
threading
• Classes,
Methods
Reflection
• Native
functions
Native code
© All rights reserved

Snippets
9 © All rights reserved
300 core snippets 63 extra snippets
Manual sample
inputs

Execution (SETTE framework)
10 © All rights reserved

Experiments
Tools
• CATG
• EvoSuite
• IntelliTest
• jPET
• SPF
• Randoop
Status
• N/A
• EX
• T/M
• NC
• C
Measures
• Coverage
• Size
• Duration
• Mutation
score
Setup
• 30s limit
• Repeat
10x
• Variable
time
12 © All rights reserved

Overview of capabilities (Status)
13 © All rights reserved

Overview of capabilities
14 © All rights reserved

Summary of insights
• Duration: 20 min – 200 min
• Randoop, EvoSuite use all available time
• Size:
• 700 (manual) < 1000 (IntelliTest) << 270 000 (Randoop)
• Extra snippets
• EvoSuite: custom sandbox
• Otherwise significant challenge
15 © All rights reserved

Summary
16 © All rights reserved
All code and results are available:
http://sette-testing.github.io

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Evaluating code-based test-generator tools

2. Code-based test generation 2 © All rights reserved int fun1(int a, int b){ if (a == 0){ printf(ERROR_MSG); return -1; } if (b > a) return b*a + 5; else return (a+b) / 2; } 1 2 3 4 # a b stm 1 0 * 1, 2 2 a!=0 b > a 3 3 a!=0 b =< a 4

7. Core features • Types, Operators • Conditionals, Loops • Arrays, Functions Basic • Structure usage • Nested structures • … Structures • Object usage • Inheritance, interfaces • … Objects • Generic functions • Generic objects • … Generics • Arithmetic, Strings • Collections • … Library © All rights reserved

12. Experiments Tools • CATG • EvoSuite • IntelliTest • jPET • SPF • Randoop Status • N/A • EX • T/M • NC • C Measures • Coverage • Size • Duration • Mutation score Setup • 30s limit • Repeat 10x • Variable time 12 © All rights reserved

15. Summary of insights • Duration: 20 min – 200 min • Randoop, EvoSuite use all available time • Size: • 700 (manual) < 1000 (IntelliTest) << 270 000 (Randoop) • Extra snippets • EvoSuite: custom sandbox • Otherwise significant challenge 15 © All rights reserved

Notas do Editor

Evaluation with detailed, fine-grained feedback

Evaluating code-based test-generator tools

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