🛡️ Cart/Wishlist System - Safeguard Tests

1. Invalid Product Tests

Test: No ID Test: Invalid Price Test: Missing Name Test: Missing Image

2. Type Coercion Tests

Test: String ID Test: Number ID Test: Mixed IDs

3. Quantity Boundary Tests

Test: Zero Quantity Test: Negative Quantity Test: Max Quantity (999)

4. localStorage Corruption Tests

Test: Corrupted JSON Test: Non-Array Data Test: Recovery

5. Mathematical Safeguard Tests

Test: String Price Test: NaN Price Test: Total Calculation

6. Rapid Operation Tests

Test: Rapid Add (10x) Test: Rapid Remove Test: Simultaneous Ops

Current Cart State

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