public void Back_MoveInHistory()
{
var query = new[]
{
new Mock <IQuery>(),
new Mock <IQuery>(),
new Mock <IQuery>(),
new Mock <IQuery>(),
new Mock <IQuery>(),
};
for (var i = 0; i < query.Length; ++i)
{
query[i].Setup(mock => mock.Text).Returns(i.ToString());
}
IExecutableQuery current = null;
var queryEvents = new QueryHistory();
queryEvents.QueryExecuted += (sender, args) => current = args.Query;
Assert.IsNull(queryEvents.Current);
queryEvents.ExecuteQuery(query[0].Object);
Assert.AreEqual(query[0].Object, queryEvents.Current);
Assert.AreEqual(query[0].Object, current);
queryEvents.ExecuteQuery(query[1].Object);
Assert.AreEqual(query[1].Object, queryEvents.Current);
Assert.AreEqual(query[1].Object, current);
queryEvents.Back();
Assert.AreEqual(query[0].Object, queryEvents.Current);
Assert.AreEqual(query[0].Object, current);
queryEvents.ExecuteQuery(query[2].Object);
Assert.AreEqual(query[2].Object, queryEvents.Current);
Assert.AreEqual(query[2].Object, current);
queryEvents.ExecuteQuery(query[3].Object);
Assert.AreEqual(query[3].Object, queryEvents.Current);
Assert.AreEqual(query[3].Object, current);
queryEvents.Back();
Assert.AreEqual(query[2].Object, queryEvents.Current);
Assert.AreEqual(query[2].Object, current);
queryEvents.Back();
Assert.AreEqual(query[0].Object, queryEvents.Current);
Assert.AreEqual(query[0].Object, current);
queryEvents.Back();
Assert.AreEqual(query[0].Object, queryEvents.Current);
Assert.AreEqual(query[0].Object, current);
queryEvents.ExecuteQuery(query[4].Object);
Assert.AreEqual(query[4].Object, queryEvents.Current);
Assert.AreEqual(query[4].Object, current);
}
public void Back_EmptyHistory()
{
var executed = false;
var queryEvents = new QueryHistory();
queryEvents.QueryExecuted += (sender, args) => executed = true;
Assert.IsFalse(executed);
Assert.IsNull(queryEvents.Current);
queryEvents.Back();
Assert.IsFalse(executed);
Assert.IsNull(queryEvents.Current);
}