TEST_FIX_SUMMARY.md

Test Fix Summary

Issue Identified

The initial tests had incorrect expectations about how sell_key behaves:

Problem

• sell_key sells ONE key at a time (not a batch)
• Original tests expected the first sell to fail when holder has 4 liquid keys
• This was incorrect - the first 4 sells should succeed, and the 5th should fail

Root Cause of Test Failures

Test 1: test_sell_reverts_when_attempting_to_use_staked_keys

• Expected: First sell_key call to fail with InsufficientBalance
• Actual: First sell_key call succeeded (returned Ok(9) for new supply)
• Why: With 4 liquid keys available, selling 1 key should succeed

Test 2: test_staked_balance_unchanged_after_sell_attempts

• Expected: First sell_key to fail, then 4 more to succeed
• Actual: Tried to sell 5 keys total, which exceeded liquid balance
• Why: The test logic was backwards

Solution Applied

Fixed Test 1: test_sell_reverts_when_attempting_to_use_staked_keys

Before:

// Just tried to sell once and expected it to fail
let result = client.try_sell_key(&creator, &holder, &None);
assert_eq!(result, Err(Ok(ContractError::InsufficientBalance)));

After:

// Sell 4 liquid keys successfully (one at a time)
for _ in 0..4 {
    let result = client.try_sell_key(&creator, &holder, &None);
    assert!(result.is_ok(), "Selling within liquid balance should succeed");
}

// Attempt to sell 5th key - should fail because only 4 were liquid
let result = client.try_sell_key(&creator, &holder, &None);
assert_eq!(
    result,
    Err(Ok(ContractError::InsufficientBalance)),
    "Selling more than liquid balance should fail"
);

Fixed Test 2: test_staked_balance_unchanged_after_sell_attempts

Before:

let _ = client.try_sell_key(&creator, &holder, &None);  // Unclear intent
assert_eq!(client.get_staked_balance(&creator, &holder), 6);

for _ in 0..4 {
    client.sell_key(&creator, &holder, &None);  // Would fail on 5th total
}

After:

// Successfully sell 4 keys (one at a time)
for _ in 0..4 {
    client.sell_key(&creator, &holder, &None);
}

// Verify staked balance unchanged after successful sells
assert_eq!(client.get_staked_balance(&creator, &holder), 6);
assert_eq!(client.get_liquid_balance(&creator, &holder), 0);

// Attempt to sell when no liquid balance remains (should fail)
let result = client.try_sell_key(&creator, &holder, &None);
assert_eq!(result, Err(Ok(ContractError::InsufficientBalance)));

Test Behavior Now Correctly Verifies

Scenario: 10 total keys, 6 staked, 4 liquid

Action	Liquid Before	Expected Result	Liquid After	Staked
Sell #1	4	✅ Success	3	6
Sell #2	3	✅ Success	2	6
Sell #3	2	✅ Success	1	6
Sell #4	1	✅ Success	0	6
Sell #5	0	❌ Fail (InsufficientBalance)	0	6

Acceptance Criteria Verification

✅ Sell of 5 (total) reverts when only 4 liquid keys available

• First 4 sells succeed
• 5th sell fails with InsufficientBalance

✅ Sell of 4 succeeds using only liquid balance

• All 4 liquid keys can be sold one at a time
• Staked keys remain untouched

✅ Staked balance unchanged after both attempts

• Remains at 6 after successful sells
• Remains at 6 after failed sell attempt
• Liquid balance correctly reaches 0 after 4 sells

Implementation Correctness

The sell_key implementation is correct:

// Check liquid balance (total balance - staked balance)
let staked_balance_key = constants::storage::staked_balance(&creator, &seller);
let staked_balance: u32 = env
    .storage()
    .persistent()
    .get(&staked_balance_key)
    .unwrap_or(0);
let liquid_balance = current_balance.saturating_sub(staked_balance);

if liquid_balance == 0 {
    return Err(ContractError::InsufficientBalance);
}

This properly:

1. Calculates liquid balance as total - staked
2. Rejects sells when liquid balance is 0
3. Allows sells when liquid balance > 0 (for the single key being sold)

Commit

18d975b fix: correct test expectations for sell_key liquid balance validation

Summary

The implementation was correct all along. The tests had incorrect expectations about the behavior of sell_key which sells one key per call, not a batch. Tests now correctly verify that:

1. Multiple sells within liquid balance succeed
2. Sells beyond liquid balance fail
3. Staked balance remains unchanged throughout