Atlas › 12 Programming for QA › Data Structures for QA☰ Read as one page
Data Structures for QA
3.1OverviewUnderstanding data structures is not academic trivia — it directly impacts how you write test assertions, process test data, validate API…3.2Lists and ArraysLists (Python) and arrays (JavaScript) are the most common data structure in test automation. API responses contain lists of items. Test…3.3Dictionaries and ObjectsDictionaries (Python) and objects (JavaScript) are the native format for JSON data, API responses, and configuration. You will work with…3.4SetsSets provide fast membership checks, deduplication, and set operations (union, intersection, difference). They are essential for validating…3.5Tuples and Named TuplesTuples are immutable sequences — useful for fixed data like locator pairs in page objects.3.6Choosing the Right Data Structure3.7Practical ExerciseGiven an API that returns paginated user lists, write functions that: 1. Collect all users across all pages into a single list 2. Verify no…3.8Key Takeaways- Lists/arrays: filtering, sorting, and transforming test data - Dicts/objects: JSON response handling, configuration, key-value lookups…