1. Testing In the Large
Saranya.V
AP/CSE,
Sri Vidya College of Engineering & Technology,
Virudhunagar

2. Small to Big
In the Small to In the Large
 First test the individual
component level. (known as
testing in the small”.
 After testing all the components
are slowly integrated and tested
at each level of integration.
 Finally the fully integrated
system is tested.
 “Integration & System Testing”
are known as testing in the
large.

3. Types
1. Bottom Up testing
2. Top Down Testing
3. Big Bang Testing
4. Sandwich Testing

4. 1. Bottom Up Testing
• Starting from detailed modules.
• Testing starts from the detailed modules and
proceeds up to the higher levels of hierarchy.
• Testing need drivers.
• Some modules may not be tested separately.

5. 2. Top Down Testing
• System developed starting from most general
modules.
• Testing starts from the most general module.
• Testing requires stubs.
• May not be tested separately

7. 3. Big Bang Testing
• All modules integrated A
in a single step and B
tested as an entire
system. C ABCDE
D
E

8. 4. Sandwich Testing
Modules Top down
• Testing combines the testing
idea of bottom up and M1 M2
top down testing.
• Fix the target layer in M3 M4 M5 M6
the hierarchy of the
modules.
Bottom up
testing