Improve test coverage for `Blockies.utilities.ts`

[georgewrmarshall]

Description

Improve test coverage for Blockies.utilities.ts to achieve 100% coverage across all metrics (statements, branches, and lines). Currently, the file has gaps in test coverage that need to be addressed to ensure comprehensive testing of all code paths and edge cases.

Technical Details

• Current coverage metrics for Blockies.utilities.ts:
  • Statements: 96.11% (target: 100%)
  • Branches: 82.05% (target: 100%)
  • Lines: 95.81% (target: 100%)
  • Uncovered lines: 407, 448-450, 558
• The Jest coverage threshold is set to 100% for all metrics, causing the build to fail
• Need to identify and test uncovered code paths, particularly conditional branches
• Focus on edge cases and error handling scenarios that may not be currently tested

Acceptance Criteria

• Achieve 100% statement coverage for Blockies.utilities.ts
• Achieve 100% branch coverage for Blockies.utilities.ts
• Achieve 100% line coverage for Blockies.utilities.ts
• All Jest coverage thresholds should pass
• New tests should cover edge cases and error conditions
• Tests should be meaningful and not just coverage-driven (avoid trivial tests)
• Existing functionality should remain unaffected
• Test suite should run without warnings or errors

References

• Test coverage report showing current gaps in Blockies.utilities.ts
• Jest configuration with 100% coverage thresholds
• Related to overall design system testing infrastructure improvements