Explanation:
Unit testing involves verifying the correctness of individual functions (units) by developers through running one or multiple test cases. These test cases typically pass a value to a function and check the returned value to determine if the test passes or fails. The pytest library is required to run Python test cases. Assert methods are commonly used across various programming languages, including Python and Scala, for writing unit test cases.
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To execute a series of unit test cases for a Python function named return_sample_dataframe using assert methods, which library is essential for the team member to install?
A
doctest
B
pytest
C
pythontesting
D
pyunittest
E
testdatabricks