Integration testing tests the interactions between software components, systems, and interfaces after component testing. It checks communication between two or more components without testing individual functions, and can include performance testing. Approaches include big bang which integrates all at once, incremental which integrates components one by one, and sandwich which starts from the middle layer. The incremental approach can be top-down, bottom-up, or functional.

1. INTEGRATION
TESTING
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2. • Integration testing tests:
1. Interfaces between components
2. Interactions to different parts of a system
3. File system and hard-ware or interfaces between systems
• Integration testing is performed after component testing
• Integration testing tests communication between 2
components, not individual component functionality
• Performance testing can also be part of integration testing
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3. • During Project Testing, integration testing may be required many times:
1. component integration testing tests the interactions between software
components and is done after component testing
2. system integration testing tests the interactions between different systems
• Approaches to integration testing:
1. Big Bang: All components or systems are integrated simultaneously, All
features are integration at one time.
Disadvantage: include its time-consuming and difficult to trace the cause of
failures
2. Incremental: All components or systems are integrated one by one, and test
is carried out after each step (incremental testing). Disadvantage: time-
consuming since stubs and drivers have to be developed
3. Sandwich testing: Integration starts from the middle layer and moves
simultaneously towards up and downhttp://appium-selenium.com/

4. Incremental Approach
1. Top-down
2. Bottom-up
3. Functional incremental
Driver
Comp 2Comp 1
Comp 1
Stub
Comp 2
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5. THANKS
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