Below are test cases used when testing the [[https://bugs.launchpad.net/evergreen/+bug/1198465|Conditional Negative Balances branch]] and identify some combinations of settings that should be tested when changes are made to billing.

==== 1. No Prohibit Negative Balance Settings Are Enabled, Payment Made ====

**Note:** tested with negative balance settings unset and with //Prohibit Negative Balances (default)// setting set to False.

  * Check out item.
  * Mark as lost. Price of item (29.99) added to the record as lost materials fee
  * Pay the entire 29.99 fee.
  * Check the item in. 

**Expected Behavior:** Produces negative balance in the amount of 29.99

==== 2. Negative Balance Settings Are Unset, No Payment Made ====

   * Check out item.
   * Mark as lost. Price of item (29.99) added to the record as lost materials fee
   * Check in item

**Expected Behavior:** $0 balance on transaction. No history of the transaction visible to the user through the GUI.

==== 3. Basic No Negative Balance Test ====

**Relevant settings:** //Prohibit Negative Balances (default)// set to True.

   * Check out item
   * Mark as lost. Price of item (12.99) added to the record as lost materials fee
   * Apply $12.99 payment to the transaction. 
   * Check the item back in.

**Expected Behavior:** $0 balance on the transaction.

==== 4. Prohibit Negative Balances with Partial Payment ====

**Relevant settings:** //Prohibit Negative Balances (default)// set to True.

   * Check out item
   * Mark as lost. Price of item (3.99) added to record as lost materials fee
   * Pay 1.99, leaving 2.00 owed on the transaction.
   * Check the item back in.

**Expected behavior:** $0 balance on the transaction

==== 5. No negative balance setting set to True – no payment made ====
   * Check out item 
   * Mark as lost – item price (24.95) added to record as lost materials fee
   * Check the item back in. 

**Expected behavior:** $0 balance on the transaction

==== 6. Restores Overdue Fines Appropriately, No Previous "Voids", Patron Will Not Owe On Lost Item Return====

**Relevant Settings:** //Void overdue fines when item is marked lost// is set to True; //Restore overdues on lost item return// is set to True; //Generate new overdues on lost item return// is set to True; //Prohibit negative balance (default)// is set to True

Due date for transaction is one month ago. Overdue fines have accrued (in my example, $1.35), but have not yet reached the maxfine rate for the transaction (in my example, $3.00).

   * Mark lost item as lost. Item price (20.00) added to record as lost materials fee. Overdue fines (1.35) show as adjusted payments.
   * Pay $10.00 towards lost fee. $10 in lost fees remaining.
   * Return the day after it is marked lost

**Expected Behavior:** Zero balance on the transaction. $11.40 is adjusted on the item return ($10.00 in remaining lost materials fee + $1.35 in reinstated overdues + $.05 in new overdue fine generated upon lost item return)


====7. Restores Overdue Fines Appropriately, No Previous "Voids", Patron Will Still Owe On Lost Item Return====


**Relevant Settings:** //Void overdue fines when item is marked lost// is set to True; //Restore overdues on lost item return// is set to True; //Generate new overdues on lost item return// is set to True; //Prohibit negative balance (default)// is set to True

Due date for item is a year ago. Overdue fines have accrued ($3 in my example, reaching the max fine limit)

   * Mark item lost. Item price ($23) is added to the record in lost materials fee. $3.00 in overdue fines are "adjusted".
   * Pay $1 towards lost fee. Patron still owes $22
   * Check the item in. 

**Expected behavior:** $2 balance on transaction for the remaining overdue fines. $23 has been adjusted upon the lost item return


====8. Restore Overdue Fines Appropriately, Previous Voids, Negative Balance Allowed====

**Relevant Settings:** //Void overdue fines when item is marked lost// set to True; //Restore overdues on lost item return// set to True; //Generate new overdues on lost item return// Set to True; //Prohibit negative balance (default)// is unset

Overdue fines had accrued on transaction ($1.75 in my example) when it was marked lost, but had not yet reached the max fine rate for the transaction ($3.00 in my example).

   * Items are marked lost before the negative balance code is loaded (or perhaps when the //Prohibit negative balance// settings are unset). The item price ($20) is added to the record as a lost materials fee. The accrued overdue fines are "voided".
   * A partial payment ($10) is made to the lost materials fee.
   * Enough time goes by for the transaction to exceed the max fine rate for the transaction.
   * Check the item in.

**Expected behavior:** The negative balance on the transaction will equal the partial payment minus the max fine rate, for a total of -$7.00 in my example. 

====9. Restore Overdue Fines Appropriately, Previous Voids, Negative Balance Allowed====

**Relevant settings** - //Void overdue fines when item is marked lost// is set to True; //Restore overdues on lost item return// is set to True; //Generate new overdues on lost item return// is set to True; Prohibit negative balance (default) – True

Overdue fines had accrued on transaction ($2.45 in my example) when it was marked lost, but had not yet reached the max fine rate for the transaction ($3.00 in my example).

   * Items are marked lost before the negative balance code is loaded (or perhaps when the //Prohibit negative balance// settings are unset). The item price ($22) is added to the record as a lost materials fee. The accrued overdue fines are "voided".
   * The //Prohibit negative balance (default)// setting is subsequently enabled.
   * A $10 partial payment is made to the lost materials fee leaving a balance of $12 on the transaction
   * Enough time goes by for the transaction to exceed the max fine rate for the transaction.
   * Check the item in.

**Expected behavior:** The balance on the transaction is zero.The adjusted payment on the transaction should equal the remaining lost materials fee ($12) plus the max fine rate ($3). In my example, a total of $15 is adjusted. 

====10. Interval Testing====

**Relevant Settings:** //Negative balance interval// set to 1 hour; //Prohibit negative balance (default)// set to True

  * Two items are checked out and marked lost.
  * Pay the entire lost materials fees more than an hour later.
  * Return one item immediately after paying the fee.
  * Return the second item more than an hour after paying the lost fee.

**Expected behavior:** A negative balance in the amount of the lost materials fee should be remaining on the first item returned. A zero balance should be remaining on the second items returned.

====11. Manually voiding lost book fee does not result in negative balances====

**Relevant Settings**: Prohibit negative balance set to true; No interval settings

   * Check out item.
   * Mark it lost. Item price ($25.25) added to the record as lost materials fee.
   * Make a partial payment in the amount of $10. Balance owed is $15.25
   * Void the rest of the payment from the client. 

**Expected/Desired behavior:** No negative balance should be produced.
**Current behavior:** Negative balance is produced.

====12. Test negative balance settings on fines====

**Relevant settings:** //Prohibit negative balances (default)// set to True

   * Use transaction that has accrued fines ($4.00 in my example)
   * Apply $2.00 payment to the fine. Remaining balance is 2.00
   * Check in using Amnesty Mode

**Expected behavior** zero balance on the transaction.

====13. Prohibit negative balances on lost materials bills ONLY====

**Relevant settings** //Prohibit negative balances on bills for lost materials// set to True; all other negative balance settings unset.

Repeat test 1 and test 12.

**Expected behavior:** 
   * Test 1 should result in a zero balance on the transaction.
   * Test 12 should result in a negative balance that equals the amount of the partial payment that was made.

====14. Prohibit negative balances on overdue bills ONLY====

Relevant settings – //Prohibit negative balances on bills for overdue materials// set to True; All other negative balance settings unset.

Repeat test 1 and test 12.

**Expected behavior:**
   * Test 1 should return a negative balance in the amount of the lost materials fee that was paid.
   * Test 12 should result in a zero balance on the transaction.