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Regex and Parsing
7.1OverviewRegular expressions and data parsing are everyday tools for QA engineers. You parse log files to find error patterns, validate response…7.2Regular Expressions for Log Parsing7.3Essential Regex Patterns for QA7.4Regex in Test Assertions7.5Regex Building Blocks7.6JSON ParsingJSON is the universal data format for APIs. Fluent JSON handling is essential.7.7YAML ParsingYAML is common in configuration files, CI/CD pipelines, and test data.7.8CSV Parsing for Test Data7.9Practical Exercise1. Write a regex that extracts all error-level log lines from a log file and groups them by service name (text in square brackets like…7.10Key Takeaways- Regex is essential for log parsing, format validation, and data extraction - Know the core patterns: \d, \w, \b, +, *, ?, (), [] - Always…