### Purpose and Objectives
* Validate shopping cart functionality to ensure accurate calculations and seamless user experience.
* Test core features, including adding and removing items, to verify correct behavior.
* Verify that the shopping cart works as expected in various scenarios, including edge cases.
### Scope of Testing
* **Features:** Cart review and update functionality, including adding and removing items.
* **Platforms:** Web application platform.
* **User Flows:** User flow and smoke testing.
### Focus Areas
* **Core Functionality:** Cart calculations, including single item, large quantity, and zero quantity.
* **High-Risk Areas:** Edge case handling, error handling, and total price calculations.
* **Error Handling:** Verification of item quantity and unit price accuracy.
### Testing Approach
* **Test Coverage:** Comprehensive testing to cover various scenarios and edge cases.
* **Future Testing Enhancement:** Continued testing and refinement to ensure the shopping cart remains reliable and accurate.
* **Testing Techniques:** Black box testing, including equivalence partitioning and boundary value analysis.
Test the functionality of all elements (username field, password field, login button) in each browser.