Why do we need to write test classes? How to identify if a class is a test class?
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Answer / Shahadat Hussain
Test classes are necessary in Salesforce to ensure that Apex code works as expected and does not introduce bugs or issues. Test classes help validate business logic by exercising the code with different inputs and edge cases.nTo identify if a class is a test class, look for the @isTest annotation at the start of the class declaration.
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