Unit Testing Boundary Conditions and Edge Cases

Overview

Systematic patterns for testing boundary conditions, corner cases, and limit values in Java using JUnit 5. Covers numeric boundaries, string edge cases, collection states, floating-point precision, date/time limits, and off-by-one scenarios.

When to Use

• Numeric min/max limits, null/empty/whitespace inputs
• Overflow/underflow validation, collection boundaries
• Off-by-one errors, floating-point precision

Instructions