What is Integration Testing?

First of all,lets define Integration testing - checking the Data flow between the two modules is called Integration testing.

Now Lets take a Scenario, Consider 2 modules where module1 is sending the data to the module2. Now we have the check the Data flow between the 2 module. We have to check if the module2 is receiving the data properly and module1 is sending the data properly. If both modules are sending and receiving the data properly, then both the modules are integrated properly. By this we can ensure that Integration testing is working fine.



Now lets write the test case for the above mentioned scenario,
1. Verify that module1 data is present.
2. Start sending the data from module1 to module2.
3. Verify that the module1 is sending the data to module2.
4. Verify that the module2 is receiving the data from module1.
5. Verify that both module1 and module2 are sending and receiving the data properly.