Download Software Engineering CS 451: Types of Testing and Testing Strategies and more Exams Software Engineering in PDF only on Docsity!
CS 451
Software Engineering
Winter 2009
Sunny Wong
Types of Testing
Unit Testing
Integration Testing
System Testing
Acceptance Testing
Regression Testing
Alpha/Beta Testing
White Box Testing
Test functionality of methods/procedures
Check logic in code (loops, conditions, etc.)
Given an input, check path of code
def fib(n) return 1 if n <= 1 return fib(n - 1) + fib(n - 2) input (^) end output
Integration Testing
Ensures interfaces between components have
been implemented correctly
Big-Bang Approach
Whole system is available Components likely to be completed at different times Harder to locate errors
Incremental Approach
Need to develop scaffolding code Focus is on each module Easier to locate errors
Scaffolding Code
Driver
Invokes the module under test Controls and monitors execution Report test results
Stub
Simulates a module not written/tested yet Can be difficult to write Need to avoid writing actual module
Top-Down Integration
Top module is tested with stubs Stubs are replaced in depth first order Some tests are re-run as new modules are integrated A B C D E F
Bottom-Up Integration
Bottom module is tested with driver Drivers are replaced in reverse depth first order Integrated modules grouped together as move up A B C D E F
Sandwich Integration
Top module is tested with stub Bottom module is tested with driver Drivers and stubs are replaced layer by layer Integrated modules grouped together as move up A B C D E F
Method Coverage
All methods have been called
Test Case 1: 5+8E%8E%8-%3%
5'"()%5+#,)%(E%#,)%FE%#,)%&-%. #5%+(%33%8- A1)GA,%8: #,)%H%3%F%9%(: #5%++(%33%F%II%F%33%&-%JJ%+H%23%&-- H%3%K&: A1)GA,%4L5%9%H: ?
Statement Coverage
All “statements” have been executed
Test Case 1: 5+4E%4E%4-%3%K
5'"()%5+#,)%(E%#,)%FE%#,)%&-%. #5%+(%33%8- A1)GA,%8: #,)%H%3%F%9%(: #5%++(%33%F%II%F%33%&-%JJ%+H%23%&-- H%3%K&: A1)GA,%4L5%9%H: ?
Branch Coverage
All predicates have been both true and false
Test Case 1: 5+4E%8E%8-%3%M(M
5'"()%5+#,)%(E%#,)%FE%#,)%&-%. #5%+(%33%8- A1)GA,%8: #,)%H%3%F%9%(: #5%++(%33%F%II%F%33%&-%JJ%+H%23%&-- H%3%K&: A1)GA,%4L5%9%H: ?
Condition Coverage
All predicates have been both true and false
Test Case 1: 5+4E%4E%7-%3%K8LN
5'"()%5+#,)%(E%#,)%FE%#,)%&-%. #5%+(%33%8- A1)GA,%8: #,)%H%3%F%9%(: #5%++(%33%F%II%F%33%&-%JJ%+H%23%&-- H%3%K&: A1)GA,%4L5%9%H: ?
Dealing With Loops
Look for test cases to:
Skip loop entirely Go through loop once Go through loop more than once
Resources
Eclipse - http://www.eclipse.org
JUnit - http://www.junit.org
EMMA (code coverage)
Console - http://emma.sourceforge.net Eclipse Plugin - http://www.eclemma.org
Demo
