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POHow do you best handle tests with dates?
 

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    <p>I am using a Repository pattern with filters in my MVC application. The project displays a list of transactions where I can specify a date period to get a subset of transactions, or specify a specific date to get transactions for that date (including year, year/month, and year/month/day views).</p> <p>I also have functionality for paging getting the next and previous transactions based on what kind of view we are looking at. For example if we are selecting all transactions for a given year/month then I find the next previous and next transactions based on this date period.</p> <p>How would you go about unit testing for such a thing... here is my mock transaction test repository.</p> <pre> public class TestTransactionsRepository : ITransactionsRepository { private IList&lt;Transaction&gt; db; public TestTransactionsRepository() { db = new List&lt;Transaction&gt;(); int i = 0; for (; i &lt; 10; i++) { db.Add(CreateTransaction(i, 3)); } for (; i &lt; 25; i++) { db.Add(CreateTransaction(i, i)); } for (; i &lt; 80; i++) { db.Add(CreateTransaction(i, 5)); } } private Transaction CreateTransaction(int id, int accountID) { return new Transaction { ID = id, AccountID = accountID, Date = ?? }; } } </pre> <p>Here is an example test scnenario.</p> <pre> [TestMethod] public void TransactionsRepository_Get_With_Filter_Between_ThisDate_ And_ThatDate_Returns_xx_Transactions() { IList&lt;Transaction&gt; transactions = TransactionsRepository.Get() .Between(thisDate, thatDate) .ToList(); Assert.AreEqual(xx, transactions.Count); } </pre> <p>And then this is my filter method</p> <pre> public static IQueryable&lt;Transaction&gt; Between( this IQueryable&lt;Transaction&gt; qry, DateTime startDate, DateTime endDate) { return from t in qry where t.Date &gt;= startDate && t.Date &lt;= endDate select t; } </pre>
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