test(contracts): enhance LegacyMintableERC20 test coverage

[devin-ai-integration]

test(contracts): enhance LegacyMintableERC20 test coverage

Summary

Enhances the LegacyMintableERC20 test file with improved coverage and quality:

• Fuzz test conversions: Converted 4 focused tests to fuzz tests (mint/burn success and revert cases) to test with randomized addresses and amounts
• Event verification: Added vm.expectEmit checks for Mint and Burn events
• New coverage: Added fuzz test for supportsInterface returning false for unsupported interface IDs
• Naming conventions: Fixed test function names (works → succeeds) and added descriptive scenario names

Review & Testing Checklist for Human

• Verify event emission tests work correctly - the test file declares events with camelCase parameters while source uses underscore-prefixed parameters (should match by signature, not names)
• Confirm fuzz test constraints are appropriate: vm.assume(_to != address(0)) for mint, vm.assume(_caller != address(l2StandardBridge)) for non-bridge tests

Test plan: Run just test-dev --match-path test/legacy/LegacyMintableERC20.t.sol -v to verify all 7 tests pass.

Notes

Link to Devin run: https://app.devin.ai/sessions/079e16162e3845be98a3418bff98a28f
Requested by: Ariel Diaz (@aliersh)

Last update: 2026-02-02 02:15 ET

[devin-ai-integration]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.6%. Comparing base (a0a2a92) to head (22f3c79).

Additional details and impacted files

@@            Coverage Diff             @@
##           develop   #19041     +/-   ##
==========================================
+ Coverage     76.3%    81.6%   +5.2%     
==========================================
  Files          188      133     -55     
  Lines        10937     6907   -4030     
==========================================
- Hits          8353     5641   -2712     
+ Misses        2438     1266   -1172     
+ Partials       146        0    -146     

Flag	Coverage Δ
cannon-go-tests-64	?
contracts-bedrock-tests	81.6% <ø> (-0.1%)	⬇️

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see 56 files with indirect coverage changes

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[alcueca]

Good bot