private void TestCast <TParam, TReturn>(CollectionResourceNode source, IEdmEntityType cast, Expression <Func <TParam, TReturn> > expectedExpression)
{
var node = new CollectionResourceCastNode(source, cast);
var result = this.testSubject.TranslateNode(node);
CompareExpressions(expectedExpression.Body, result);
}
private static string GetNavigationPath(CollectionResourceNode nodeIn)
{
if (nodeIn.NavigationSource == null)
{
return(string.Empty);
}
var pathSegments = nodeIn.NavigationSource.Path.PathSegments.Skip(1).ToArray();
var path = string.Join(Constants.SymbolDot, pathSegments);
return(string.IsNullOrWhiteSpace(path) ? string.Empty : $"{path}{Constants.SymbolDot}");
}
public void TranslatorShouldConvertWeaklyBackedEntityCollectionCast()
{
CollectionResourceNode source = this.CollectionNavigationFromParameter("c");
QueryNode node = new CollectionResourceCastNode(source, this.weaklyBackedCustomerEdmType);
var result = this.testSubject.TranslateNode(node);
var parameterExpression = Expression.Parameter(typeof(Customer), "c");
var propertyExpression = Expression.Property(parameterExpression, "OtherFriends");
var expected = Expression.Call(typeof(DataServiceProviderMethods), "OfType", new[] { typeof(Customer), typeof(object) }, propertyExpression, Expression.Constant(this.weaklyBackedDerivedType));
expected = Expression.Call(typeof(Enumerable), "Cast", new[] { typeof(object) }, expected);
CompareExpressions(expected, result);
}
