/// <summary>
/// Get News with a LINQ expression.
/// </summary>
/// <param name="action"></param>
/// <returns></returns>
public async Task <IQueryResultEnumerable <News> > GetNewsAsync(System.Linq.Expressions.Expression <System.Func <BKNews.News, bool> > action, int skip, int take)
{
try
{
#if OFFLINE_SYNC_ENABLED
if (syncItems)
{
await this.SyncAsync();
}
#endif
IMobileServiceTableQuery <News> query = NewsTable.Where(action).OrderByDescending(news => news.NewsDate).Skip(skip).Take(take);
query = query.IncludeTotalCount();
IQueryResultEnumerable <News> items = (IQueryResultEnumerable <News>) await query.ToListAsync();
return(items);
}
catch (MobileServiceInvalidOperationException msioe)
{
Debug.WriteLine(@"Invalid sync operation: {0}", msioe.Message);
}
catch (Exception e)
{
Debug.WriteLine(@"Sync error: {0}", e.Message);
}
return(null);
}
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;
IMobileServiceTableQuery <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);
}
public async static Task <List <T> > LoadAllAsync <T>(this IMobileServiceTableQuery <T> table, int bufferSize = 1000)
{
var query = table.IncludeTotalCount();
var results = await query.ToEnumerableAsync();
long count = ((ITotalCountProvider)results).TotalCount;
var updates = new List <T>();
if (results != null && count > 0)
{
while (updates.Count < count)
{
var next = await query.Skip(updates.Count).Take(bufferSize).ToListAsync();
updates.AddRange(next);
}
}
return(updates);
}
private async Task CreateQueryTest <MovieType, TExpectedException>(
string name, Expression <Func <MovieType, bool> > whereClause,
int?top = null, int?skip = null, OrderByClause[] orderBy = null,
Expression <Func <MovieType, string> > selectExpression = null, bool?includeTotalCount = null,
string odataExpression = null, bool useStringIdTable = false,
Func <MovieType, bool> whereLambda = null)
where MovieType : class, IMovie
where TExpectedException : Exception
{
Log("### Executing {0}.", name);
if (whereClause == null && whereLambda != null)
{
Assert.Fail("The argument 'whereLambda' is optional and can only be specified if 'whereClause' is also specified.");
}
try
{
var table = this.GetClient().GetTable <MovieType>();
IEnumerable <MovieType> readMovies = null;
IEnumerable <string> readProjectedMovies = null;
if (odataExpression == null)
{
IMobileServiceTableQuery <MovieType> query = null;
IMobileServiceTableQuery <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();
}
if (selectedQuery == null)
{
// Both ways of querying should be equivalent, so using both with equal probability here.
// TODO: Make it deterministic
var tickCount = Environment.TickCount;
if ((tickCount % 2) == 0)
{
Log("Querying using MobileServiceTableQuery<T>.ToEnumerableAsync");
readMovies = await query.ToEnumerableAsync();
}
else
{
Log("Querying using IMobileServiceTable<T>.ReadAsync(MobileServiceTableQuery<U>)");
readMovies = await table.ReadAsync(query);
}
}
else
{
readProjectedMovies = await selectedQuery.ToEnumerableAsync();
}
}
else
{
Log("Using the OData query directly");
JToken result = await table.ReadAsync(odataExpression);
readMovies = result.ToObject <IEnumerable <MovieType> >();
}
long actualTotalCount = -1;
ITotalCountProvider totalCountProvider = (readMovies as ITotalCountProvider) ?? (readProjectedMovies as ITotalCountProvider);
if (totalCountProvider != null)
{
actualTotalCount = totalCountProvider.TotalCount;
}
IEnumerable <MovieType> expectedData;
if (useStringIdTable)
{
var movies = QueryTestData.TestMovies();
expectedData = new MovieType[movies.Length];
for (var i = 0; i < movies.Length; i++)
{
((MovieType[])expectedData)[i] = (MovieType)(IMovie)movies[i];
}
}
else
{
expectedData = QueryTestData.TestIntIdMovies.Select(s => (MovieType)(IMovie)s);
}
// Due to a Xamarin.iOS bug, Expression.Compile() does not work for some expression trees,
// in which case we allow the caller to provide a lambda directly and we use it instead of
// compiling the expression tree.
if (whereLambda != null)
{
expectedData = expectedData.Where(whereLambda);
}
else 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)
{
Log("Total count was requested, but the returned value is incorrect: expected={0}, actual={1}", expectedTotalCount, actualTotalCount);
Assert.Fail("");
return;
}
}
List <string> errors = new List <string>();
bool expectedDataIsSameAsReadData;
if (selectExpression != null)
{
string[] expectedProjectedData = expectedData.Select(selectExpression.Compile()).ToArray();
expectedDataIsSameAsReadData = Utilities.CompareArrays(expectedProjectedData, readProjectedMovies.ToArray(), errors);
}
else
{
expectedDataIsSameAsReadData = Utilities.CompareArrays(expectedData.ToArray(), readMovies.ToArray(), errors);
}
if (!expectedDataIsSameAsReadData)
{
foreach (var error in errors)
{
Log(error);
}
Log("Expected data is different");
Assert.Fail("");
return;
}
else
{
if (typeof(TExpectedException) == typeof(ExceptionTypeWhichWillNeverBeThrown))
{
return;
}
else
{
Log("Error, test should have failed with {0}, but succeeded.", typeof(TExpectedException).FullName);
Assert.Fail("");
return;
}
}
}
catch (TExpectedException ex)
{
Log("Caught expected exception - {0}: {1}", ex.GetType().FullName, ex.Message);
return;
}
}
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,
string odataExpression = null)
where TExpectedException : Exception
{
return(new ZumoTest(name, async delegate(ZumoTest test)
{
try
{
var table = ZumoTestGlobals.Instance.Client.GetTable <Movie>();
IEnumerable <Movie> readMovies = null;
IEnumerable <string> readProjectedMovies = null;
if (odataExpression == null)
{
IMobileServiceTableQuery <Movie> query = null;
IMobileServiceTableQuery <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();
}
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();
}
}
else
{
test.AddLog("Using the OData query directly");
JToken result = await table.ReadAsync(odataExpression);
readMovies = result.ToObject <IEnumerable <Movie> >();
}
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;
}
}));
}
private async Task CreateQueryTest <MovieType, TExpectedException>(
string name, Expression <Func <MovieType, bool> > whereClause,
int?top = null, int?skip = null, OrderByClause[] orderBy = null,
Expression <Func <MovieType, string> > selectExpression = null, bool?includeTotalCount = null,
string odataExpression = null, bool useStringIdTable = false,
Func <MovieType, bool> whereLambda = null)
where MovieType : class, IMovie
where TExpectedException : Exception
{
Assert.False(whereClause == null && whereLambda != null);
try
{
var table = this.GetClient().GetTable <MovieType>();
IEnumerable <MovieType> readMovies = null;
IEnumerable <string> readProjectedMovies = null;
if (odataExpression == null)
{
IMobileServiceTableQuery <MovieType> query = null;
IMobileServiceTableQuery <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();
}
if (selectedQuery == null)
{
// Both ways of querying should be equivalent, so using both with equal probability here.
// TODO: Make it deterministic
var tickCount = Environment.TickCount;
if ((tickCount % 2) == 0)
{
readMovies = await query.ToEnumerableAsync();
}
else
{
readMovies = await table.ReadAsync(query);
}
}
else
{
readProjectedMovies = await selectedQuery.ToEnumerableAsync();
}
}
else
{
JToken result = await table.ReadAsync(odataExpression);
readMovies = result.ToObject <IEnumerable <MovieType> >();
}
long actualTotalCount = -1;
#pragma warning disable CS0618 // Type or member is obsolete
ITotalCountProvider totalCountProvider = (readMovies as ITotalCountProvider) ?? (readProjectedMovies as ITotalCountProvider);
#pragma warning restore CS0618 // Type or member is obsolete
if (totalCountProvider != null)
{
actualTotalCount = totalCountProvider.TotalCount;
}
IEnumerable <MovieType> expectedData;
if (useStringIdTable)
{
var movies = QueryTestData.TestMovies();
expectedData = new MovieType[movies.Length];
for (var i = 0; i < movies.Length; i++)
{
((MovieType[])expectedData)[i] = (MovieType)(IMovie)movies[i];
}
}
else
{
expectedData = QueryTestData.TestIntIdMovies.Select(s => (MovieType)(IMovie)s);
}
// Due to a Xamarin.iOS bug, Expression.Compile() does not work for some expression trees,
// in which case we allow the caller to provide a lambda directly and we use it instead of
// compiling the expression tree.
if (whereLambda != null)
{
expectedData = expectedData.Where(whereLambda);
}
else 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)
{
Assert.Equal(expectedTotalCount, actualTotalCount);
}
List <string> errors = new List <string>();
bool expectedDataIsSameAsReadData;
if (selectExpression != null)
{
string[] expectedProjectedData = expectedData.Select(selectExpression.Compile()).ToArray();
expectedDataIsSameAsReadData = Utilities.CompareArrays(expectedProjectedData, readProjectedMovies.ToArray(), errors);
}
else
{
expectedDataIsSameAsReadData = Utilities.CompareArrays(expectedData.ToArray(), readMovies.ToArray(), errors);
}
Assert.True(expectedDataIsSameAsReadData);
if (typeof(TExpectedException) != typeof(ExceptionTypeWhichWillNeverBeThrown))
{
Assert.True(false, "Test should have failed");
return;
}
}
catch (TExpectedException)
{
return;
}
}