test: #1274 #1272 #1271 #1273 add tests for fees, token config, donor…

[feyisaralawal]

… count, and fee validation

Closes #1274, Closes #1272, Closes #1271, Closes #1273

Detailed breakdown of changes and implementation:

1. Issue Add tests for campaign creation with fees #1274: Add tests for campaign creation with fees

• Implemented create_pool_with_fee and create_campaign_with_fee in lib.rs:
  • Enforces creator authorization (creator.require_auth()).
  • Fetches the configured creation fee via get_creation_fee.
  • If fee > 0, transfers fee tokens from creator to contract address using Soroban token client.
  • Accumulates collected fees into persistent storage (UNCLAIMED_FEES).
  • Emits creation_fee_paid and fee_paid events with creator and fee amount.
  • If fee == 0, creates the pool directly without token transfer or balance checks.
• Created test_issue_1274_creation_fees.rs with 5 tests:
  • (1) Creator with sufficient balance pays fee successfully (test_campaign_creation_fee_sufficient_balance_succeeds).
  • (2) Creator with insufficient balance fails with panic (test_campaign_creation_fee_insufficient_balance_fails).
  • (3) Zero fee allows creation without balance check or tokens (test_campaign_creation_zero_fee_no_balance_check).
  • (4) Fee tokens transferred from creator to contract (test_campaign_creation_fee_tokens_transferred_to_contract).
  • (5) Creation fee event emitted on successful creation (test_campaign_creation_fee_event_emitted).

2. Issue Add tests for crowdfunding token configuration #1272: Add tests for crowdfunding token configuration

• Added set_crowdfunding_token and get_crowdfunding_token in lib.rs:
  • Enforces admin authorization (admin.require_auth()).
  • Validates caller against stored admin, rejecting non-admins with ContractError::UnauthorizedAdmin.
  • Validates token address to ensure contract's own address cannot be set as crowdfunding token (InvalidTokenAddress).
  • Persists token under CROWDFUNDING_TOKEN_KEY and emits crowdfunding_token_set and tok_set events.
  • get_crowdfunding_token retrieves the configured token address from persistent storage.
• Created test_issue_1272_crowdfunding_token.rs with 5 tests:
  • (1) Admin can update token successfully (test_admin_can_update_crowdfunding_token_successfully).
  • (2) Non-admin gets authorization error (test_non_admin_update_token_authorization_error).
  • (3) Setting invalid token address handled properly (test_setting_invalid_token_address_handled_properly).
  • (4) Token update emits correct event (test_token_update_emits_correct_event).
  • (5) Get function returns updated token (test_get_crowdfunding_token_returns_updated_token).

3. Issue Add tests for donor count tracking accuracy #1271: Add tests for donor count tracking accuracy

• Validated get_donor_count in lib.rs, which returns the persistent count of unique contributors tracked per campaign.
• Created test_issue_1271_donor_count_accuracy.rs with 5 tests:
  • (1) New campaign has 0 donors (test_new_campaign_has_zero_donors).
  • (2) First donation increments donor count to 1 (test_first_donation_increments_donor_count_to_one).
  • (3) Same donor's multiple donations keeps count at 1 (test_same_donor_multiple_donations_keeps_count_at_one).
  • (4) Different donors increment count correctly (test_different_donors_increment_count_correctly).
  • (5) Nonexistent campaign returns error (test_nonexistent_campaign_donor_count_returns_error and try variant returning ContractError::PoolNotFound).

4. Issue Add tests for creation fee configuration validation #1273: Add tests for creation fee configuration validation

• Validated set_creation_fee and get_creation_fee in lib.rs:
  • Enforces admin authorization and verifies against stored admin (ContractError::UnauthorizedAdmin).
  • Enforces non-negative fee validation, rejecting negative fees with ContractError::InvalidFee.
  • Updates persistent storage and publishes fee update events.
• Created test_issue_1273_creation_fee_validation.rs with 6 tests:
  • (1) Admin can set positive fee (test_admin_can_set_positive_creation_fee).
  • (2) Admin can set zero fee (test_admin_can_set_zero_creation_fee).
  • (3) Negative fee fails with InvalidFee (test_negative_fee_fails_with_invalid_fee and try variant returning ContractError::InvalidFee).
  • (4) Non-admin authorization fails (test_non_admin_authorization_fails).
  • (5) Fee update emits event (test_fee_update_emits_event).
  • (6) Get function returns updated fee (test_get_function_returns_updated_fee).

5. Registered all 4 test modules in lib.rs.

Summary

Related Issue

Closes #

Layer Touched

This PR modifies exactly one layer (per the single-layer-per-PR convention in AGENTS.md):

• nevo_frontend — Next.js frontend
• nevo_server — NestJS backend API
• nevo_contract — Soroban smart contract (Rust)
• Other (docs, CI, repo config — no source layer changed)

If your changes span more than one source layer, stop and split this PR.

Checklist

All PRs

• The branch is up to date with main
• No .env files, secrets, or API keys are included
• No auto-generated files (node_modules/, target/, .next/, dist/) are committed

Frontend (nevo_frontend/) — if applicable

• npm run build passes locally (run from nevo_frontend/)
• No TypeScript errors (npx tsc --noEmit)
• No MOCK_ constants left in app/ or src/store/
• New or updated tests added where appropriate

Backend (nevo_server/) — if applicable

• npm run build passes locally (run from nevo_server/)
• No TypeScript errors
• New endpoints follow RESTful conventions

Contract (nevo_contract/) — if applicable

• cargo build --release --target wasm32-unknown-unknown passes
• cargo test --lib passes — all tests green
• No unsafe code introduced without justification

Testing Notes

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[cyber-punk112]

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[cyber-punk112]

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