public async Task TotalCountBasics()
{
// Insert a few records
IMobileServiceTable <ToDo> table = GetClient().GetTable <ToDo>();
ToDo first = new ToDo {
Title = "ABC", Complete = false
};
await table.InsertAsync(first);
await table.InsertAsync(new ToDo { Title = "DEF", Complete = true });
await table.InsertAsync(new ToDo { Title = "GHI", Complete = false });
ITotalCountProvider countProvider = null;
MobileServiceTableQuery <ToDo> query = table.Where(t => t.Id >= first.Id);
// Run a simple query and verify we get all 3 items, but the
// TotalCount is not provided.
List <ToDo> items = await query.ToListAsync();
countProvider = items as ITotalCountProvider;
Assert.AreEqual(3, items.Count);
Assert.IsNotNull(countProvider);
Assert.AreEqual(-1L, countProvider.TotalCount);
IEnumerable <ToDo> sequence = await query.ToEnumerableAsync();
countProvider = sequence as ITotalCountProvider;
Assert.IsNotNull(countProvider);
Assert.AreEqual(-1L, countProvider.TotalCount);
// Now use IncludeTotalCount and make sure we get the expected
// number of results
query = query.IncludeTotalCount();
items = await query.ToListAsync();
countProvider = items as ITotalCountProvider;
Assert.AreEqual(3, items.Count);
Assert.IsNotNull(countProvider);
Assert.AreEqual(3L, countProvider.TotalCount);
sequence = await query.ToEnumerableAsync();
countProvider = sequence as ITotalCountProvider;
Assert.IsNotNull(countProvider);
Assert.AreEqual(3L, countProvider.TotalCount);
// Verify that IncludeTotalCount is correctly propagated with
// projections
List <string> titles = await query.Select(t => t.Title).ToListAsync();
countProvider = titles as ITotalCountProvider;
Assert.AreEqual(3, titles.Count);
Assert.IsNotNull(countProvider);
Assert.AreEqual(3L, countProvider.TotalCount);
}
private static ZumoTest CreateQueryTest <TExpectedException>(
string name, Expression <Func <Movie, bool> > whereClause,
int?top = null, int?skip = null, OrderByClause[] orderBy = null,
Expression <Func <Movie, string> > selectExpression = null, bool?includeTotalCount = null)
where TExpectedException : Exception
{
return(new ZumoTest(name, async delegate(ZumoTest test)
{
try
{
var table = ZumoTestGlobals.Instance.Client.GetTable <Movie>();
MobileServiceTableQuery <Movie> query = null;
MobileServiceTableQuery <string> selectedQuery = null;
if (whereClause != null)
{
query = table.Where(whereClause);
}
if (orderBy != null)
{
if (query == null)
{
query = table.Where(m => m.Duration == m.Duration);
}
query = ApplyOrdering(query, orderBy);
}
if (top.HasValue)
{
query = query == null ? table.Take(top.Value) : query.Take(top.Value);
}
if (skip.HasValue)
{
query = query == null ? table.Skip(skip.Value) : query.Skip(skip.Value);
}
if (selectExpression != null)
{
selectedQuery = query == null ? table.Select(selectExpression) : query.Select(selectExpression);
}
if (includeTotalCount.HasValue)
{
query = query.IncludeTotalCount();
}
IEnumerable <Movie> readMovies = null;
IEnumerable <string> readProjectedMovies = null;
if (selectedQuery == null)
{
// Both ways of querying should be equivalent, so using both with equal probability here.
var tickCount = Environment.TickCount;
if ((tickCount % 2) == 0)
{
test.AddLog("Querying using MobileServiceTableQuery<T>.ToEnumerableAsync");
readMovies = await query.ToEnumerableAsync();
}
else
{
test.AddLog("Querying using IMobileServiceTable<T>.ReadAsync(MobileServiceTableQuery<U>)");
readMovies = await table.ReadAsync(query);
}
}
else
{
readProjectedMovies = await selectedQuery.ToEnumerableAsync();
}
long actualTotalCount = -1;
ITotalCountProvider totalCountProvider = (readMovies as ITotalCountProvider) ?? (readProjectedMovies as ITotalCountProvider);
if (totalCountProvider != null)
{
actualTotalCount = totalCountProvider.TotalCount;
}
IEnumerable <Movie> expectedData = ZumoQueryTestData.AllMovies;
if (whereClause != null)
{
expectedData = expectedData.Where(whereClause.Compile());
}
long expectedTotalCount = -1;
if (includeTotalCount.HasValue && includeTotalCount.Value)
{
expectedTotalCount = expectedData.Count();
}
if (orderBy != null)
{
expectedData = ApplyOrdering(expectedData, orderBy);
}
if (skip.HasValue)
{
expectedData = expectedData.Skip(skip.Value);
}
if (top.HasValue)
{
expectedData = expectedData.Take(top.Value);
}
if (includeTotalCount.HasValue)
{
if (expectedTotalCount != actualTotalCount)
{
test.AddLog("Total count was requested, but the returned value is incorrect: expected={0}, actual={1}", expectedTotalCount, actualTotalCount);
return false;
}
}
List <string> errors = new List <string>();
bool expectedDataIsSameAsReadData;
if (selectExpression != null)
{
string[] expectedProjectedData = expectedData.Select(selectExpression.Compile()).ToArray();
expectedDataIsSameAsReadData = Util.CompareArrays(expectedProjectedData, readProjectedMovies.ToArray(), errors);
}
else
{
expectedDataIsSameAsReadData = Util.CompareArrays(expectedData.ToArray(), readMovies.ToArray(), errors);
}
if (!expectedDataIsSameAsReadData)
{
foreach (var error in errors)
{
test.AddLog(error);
}
test.AddLog("Expected data is different");
return false;
}
else
{
if (typeof(TExpectedException) == typeof(ExceptionTypeWhichWillNeverBeThrown))
{
return true;
}
else
{
test.AddLog("Error, test should have failed with {0}, but succeeded.", typeof(TExpectedException).FullName);
return false;
}
}
}
catch (TExpectedException ex)
{
test.AddLog("Caught expected exception - {0}: {1}", ex.GetType().FullName, ex.Message);
return true;
}
}));
}