Fix Scenario Outline Variables in Array and Named Parameter Variable Wrapped in Invalid Curly Braces

[olexale]

This pull request enhances the scenario and feature file generation logic and expands test coverage for edge cases in feature parsing. The main changes include a more context-aware placeholder replacement function, additional tests for data tables with special characters and unicode, and improved handling of feature/scenario names with special characters and long descriptions.

[Copilot]

Pull Request Overview

This PR enhances scenario outline placeholder handling to support context-aware replacement based on whether placeholders appear inside or outside parameter blocks (braces). The implementation adds comprehensive test coverage for edge cases including nested braces, special characters, and unicode support.

• Refactored _replacePlaceholders to use a new context-aware algorithm that tracks brace depth
• Added 11 new test cases covering various placeholder scenarios including arrays, named parameters, nested structures, and special characters
• Removed unused import and replaced a custom headers test with more comprehensive feature tests

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
lib/src/scenario_generator.dart	Implemented context-aware placeholder replacement using brace depth tracking to differentiate between placeholders inside and outside parameter blocks
test/scenario_outline_test.dart	Added extensive test coverage for scenario outline variable handling including edge cases with arrays, named parameters, nested braces, unicode, and special characters
test/feature_test.dart	Removed unused import and replaced custom headers test with new tests for special characters, long step descriptions, and multiple scenarios
test/data_tables_test.dart	Added tests for edge cases in data tables including single-row tables, special characters, and unicode content

Comments suppressed due to low confidence (1)

lib/src/scenario_generator.dart:1

• The generated code operator: < is invalid Dart syntax. A standalone < operator cannot be used as a named parameter value. This test expects invalid Dart code to be generated, which suggests the placeholder replacement logic may not handle non-placeholder angle brackets correctly when they appear inside parameter blocks.

import 'package:bdd_widget_test/src/bdd_line.dart';

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