Add Unit Tests for TransactionsListViewModel

sweep-ai[bot] commented 1 year ago

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Description

This PR adds unit tests for the TransactionsListViewModel in the CashBud application. The TransactionsListViewModel is responsible for managing the transactions list screen and interacts with a TransactionsManagerProtocol to perform operations such as fetching transactions, sorting transactions, deleting transactions, calculating costs per month, getting icon strings, and making recurrence descriptions.

The unit tests cover all the public methods in the ViewModel, including getTransactions(), sortTransactions(), deleteTransactionAndUpdate(at:), calculateCostsPerMonth(for:), getIconString(for:), and makeRecurrenceDescription(recurrence:). The tests also cover the initialization of the ViewModel and the setting of its properties. Mock objects are used to simulate the behavior of the TransactionsManagerProtocol and test data is used for transactions.

Summary of Changes

Added unit tests for the TransactionsListViewModel in the CashBudTests/Tests/ViewModels/TransactionsListViewModelTest.swift file.
Created a mock TransactionsManagerProtocol to simulate the behavior of the real TransactionsManager.
Created mock transactions for testing purposes.
Wrote tests for the initialization of the TransactionsListViewModel, getTransactions() method, sortTransactions() method, deleteTransactionAndUpdate(at:) method, calculateCostsPerMonth(for:) method, getIconString(for:) method, makeRecurrenceDescription(recurrence:) method, and error handling in the ViewModel.

Fixes #93.

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