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in Testing by
Q:
What is the difference between a test driver and a test stub?

1 Answer

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The test driver is a section of code that calls a software component under test. It is useful in testing that follows the bottom-up approach.

The test stub is a dummy program that integrates with an application to complete its functionality. It is relevant for testing that uses the top-down approach.

For example:

Let’s assume a scenario where we have to test the interface between Modules A and B. We have developed only Module A. Here, we can test Module A if we have the real Module B or a dummy module for it. In this case, we call Module B as the test stub.

Now, Module B can’t send or receive data directly from Module A. In such a scenario, we’ve to move data from one module to another using some external features called test driver.

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