http://www.gcreddy.com/2017/07/positive-and-negative-testing.html
Derive Positive & Negative Test Scenarios from Test Requirements, Document Positive and Negative Test Cases using Software Test Design Techniques like Equivalence Partitioning, and Boundary Value Analysis. Conduct Positive and Negative Testing. Executing Positive and Negative Test Cases Manually, and using Automated Test Tools like Selenium (Data Driven Testing).