test(drive-abci): improve processor validation test coverage

[QuantumExplorer]

Issue being fixed or feature implemented

Improve test coverage for the packages/rs-drive-abci/src/execution/validation/state_transition/processor/ module, which previously had zero tests for its trait implementations.

What was done?

Added 46 unit tests covering all state transition routing logic in the processor validation traits module. Tests verify correct classification of every StateTransition variant across 11 trait files:

• is_allowed.rs: has_is_allowed_validation for all 20 transition types
• identity_based_signature.rs: uses_identity_in_state and validates_signature_based_on_identity_info for all variants
• identity_balance.rs: has_identity_minimum_balance_pre_check_validation and error when identity has no balance
• identity_nonces.rs: has_identity_nonce_validation for both version 0 and version 1, plus unknown version error path
• basic_structure.rs: has_basic_structure_validation including version-gated data contract behavior
• advanced_structure_without_state.rs: has_advanced_structure_validation_without_state
• advanced_structure_with_state.rs: has_advanced_structure_validation_with_state and requires_advanced_structure_validation_with_state_on_check_tx
• state.rs: has_state_validation for all variants
• prefunded_specialized_balance.rs: uses_prefunded_specialized_balance_for_payment
• address_balances_and_nonces.rs: has_addresses_balances_and_nonces_validation
• address_witnesses.rs: has_address_witness_validation plus unknown version error paths
• addresses_minimum_balance.rs: has_addresses_minimum_balance_pre_check_validation
• shielded_proof.rs: has_shielded_proof_validation, has_shielded_minimum_fee_validation, and unknown version error paths

How Has This Been Tested?

All 46 tests pass locally:

cargo test -p drive-abci --lib "execution::validation::state_transition::processor::traits"
test result: ok. 46 passed; 0 failed; 0 ignored; 0 measured; 1792 filtered out; finished in 0.04s

Tests are fast (0.04s total) as they only exercise pattern-matching logic and boolean routing methods without any I/O or cryptographic operations.

Breaking Changes

None. This PR only adds tests.

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated relevant unit/integration/functional/e2e tests
• I have added "!" to the title and described breaking changes in the corresponding section if my code contains any
• I have made corresponding changes to the documentation if needed

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: eb6802cc-460c-4ddb-96b2-0e4bb1f28025

📥 Commits

Reviewing files that changed from the base of the PR and between 882c255 and 9a32fd5.

📒 Files selected for processing (13)

• packages/rs-drive-abci/src/execution/validation/state_transition/processor/traits/address_balances_and_nonces.rs
• packages/rs-drive-abci/src/execution/validation/state_transition/processor/traits/address_witnesses.rs
• packages/rs-drive-abci/src/execution/validation/state_transition/processor/traits/addresses_minimum_balance.rs
• packages/rs-drive-abci/src/execution/validation/state_transition/processor/traits/advanced_structure_with_state.rs
• packages/rs-drive-abci/src/execution/validation/state_transition/processor/traits/advanced_structure_without_state.rs
• packages/rs-drive-abci/src/execution/validation/state_transition/processor/traits/basic_structure.rs
• packages/rs-drive-abci/src/execution/validation/state_transition/processor/traits/identity_balance.rs
• packages/rs-drive-abci/src/execution/validation/state_transition/processor/traits/identity_based_signature.rs
• packages/rs-drive-abci/src/execution/validation/state_transition/processor/traits/identity_nonces.rs
• packages/rs-drive-abci/src/execution/validation/state_transition/processor/traits/is_allowed.rs
• packages/rs-drive-abci/src/execution/validation/state_transition/processor/traits/prefunded_specialized_balance.rs
• packages/rs-drive-abci/src/execution/validation/state_transition/processor/traits/shielded_proof.rs
• packages/rs-drive-abci/src/execution/validation/state_transition/processor/traits/state.rs

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch test/drive-abci-processor-validation-coverage

📝 Coding Plan

• Generate coding plan for human review comments

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[codecov]

Codecov Report

❌ Patch coverage is 98.00885% with 27 lines in your changes missing coverage. Please review.
✅ Project coverage is 70.61%. Comparing base (882c255) to head (9a32fd5).
⚠️ Report is 3 commits behind head on v3.1-dev.

Files with missing lines	Patch %	Lines
...on/state_transition/processor/traits/is_allowed.rs	97.29%	4 Missing ⚠️
...tate_transition/processor/traits/shielded_proof.rs	97.03%	4 Missing ⚠️
.../processor/traits/advanced_structure_with_state.rs	97.02%	3 Missing ⚠️
...on/processor/traits/address_balances_and_nonces.rs	97.93%	2 Missing ⚠️
...e_transition/processor/traits/address_witnesses.rs	98.18%	2 Missing ⚠️
...tion/processor/traits/addresses_minimum_balance.rs	97.50%	2 Missing ⚠️
...ocessor/traits/advanced_structure_without_state.rs	96.72%	2 Missing ⚠️
...te_transition/processor/traits/identity_balance.rs	98.27%	2 Missing ⚠️
...ition/processor/traits/identity_based_signature.rs	99.31%	2 Missing ⚠️
...idation/state_transition/processor/traits/state.rs	98.49%	2 Missing ⚠️
... and 2 more

Additional details and impacted files

@@             Coverage Diff              @@
##           v3.1-dev    #3282      +/-   ##
============================================
+ Coverage     70.53%   70.61%   +0.07%     
============================================
  Files          3293     3293              
  Lines        263234   264257    +1023     
============================================
+ Hits         185683   186611     +928     
- Misses        77551    77646      +95     

Components	Coverage Δ
dpp	58.47% <ø> (-0.12%)	⬇️
drive	78.18% <ø> (ø)
drive-abci	83.31% <98.00%> (+0.20%)	⬆️
sdk	31.25% <ø> (ø)
dapi-client	39.08% <ø> (ø)
platform-version	∅ <ø> (∅)
platform-value	39.35% <ø> (ø)
platform-wallet	60.40% <ø> (ø)
drive-proof-verifier	∅ <ø> (∅)

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