[Test]:. Implementing Unit Tests for MealDetailBloc

[dudaa28]

Unit Tests for MealDetailBloc

• Tested Method: UpdateKcalEvent
• Tested Class: MealDetailBloc
• Test Location: OpenNutriTracker/blob/PTOSS-03/test/unit_test/meal_detail_bloc_test.dart

Unit Tests for MealDetailBloc with MC/DC Coverage and Nutritional Calculation Validations

Description

This PR adds a comprehensive suite of unit tests for the MealDetailBloc, ensuring validation of input fields, unit conversions, and nutritional calculations related to a meal.

The tests follow the Modified Condition/Decision Coverage (MC/DC) methodology to cover logical decisions affecting the app flow, focusing on:

• Validation of required fields (selectedUnit and selectedTotalQuantity)
• Correct conversion between measurement units (serving, oz, fl.oz, g)
• Accurate calculation of nutritional values based on the converted quantity
• Handling of parsing errors and invalid inputs
• Scenarios with null or zero nutrient values
• Correct conversion when dealing with decimal commas and large quantities

Changes Included

• Tests validating empty or invalid inputs
• Tests for quantity conversion based on the selected unit
• Tests for accurate nutritional value calculations (energy, carbs, fat, protein)
• Tests ensuring expected behavior with null, zero, and Brazilian decimal number formats
• Additional tests for edge cases (very large quantities)
• Test coverage ensuring MC/DC combinations are adequately tested

How to Test

• Run flutter test in the project root to execute all unit tests.
• Confirm all tests pass without errors.
• Check coverage reports to ensure key conditions and decisions are covered.

Technical Context

• Nutritional values are normalized per unit quantity (e.g., kcal per 1g)
• Unit conversions use the UnitCalc utility class
• Tests focus on calculation logic and input validation simulating user entries

Checklist

• Code is commented and organized
• Tests created for main use cases and edge cases
• Tests pass in local environment
• Documentation updated as needed

Related Issues

• Not applicable