public void CreateTypeNameExpression_ReturnsConditionalExpression_IfTypeHasDerivedTypes()
{
// Arrange
IEdmEntityType baseType = new EdmEntityType("NS", "BaseType");
IEdmEntityType typeA = new EdmEntityType("NS", "A", baseType);
IEdmEntityType typeB = new EdmEntityType("NS", "B", baseType);
IEdmEntityType typeAA = new EdmEntityType("NS", "AA", typeA);
IEdmEntityType typeAAA = new EdmEntityType("NS", "AAA", typeAA);
IEdmEntityType[] types = new[] { baseType, typeA, typeAAA, typeB, typeAA };
EdmModel model = new EdmModel();
foreach (var type in types)
{
model.AddElement(type);
model.SetAnnotationValue(type, new ClrTypeAnnotation(new MockType(type.Name, @namespace: type.Namespace)));
}
Expression source = Expression.Constant(42);
// Act
Expression result = SelectExpandBinder.CreateTypeNameExpression(source, baseType, model);
// Assert
Assert.Equal(
result.ToString(),
@"IIF((42 Is AAA), ""NS.AAA"", IIF((42 Is AA), ""NS.AA"", IIF((42 Is B), ""NS.B"", IIF((42 Is A), ""NS.A"", ""NS.BaseType""))))");
}
public void CreateTypeNameExpression_ReturnsNull_IfTypeHasNoDerivedTypes()
{
// Arrange
IEdmEntityType baseType = new EdmEntityType("NS", "BaseType");
EdmModel model = new EdmModel();
model.AddElement(baseType);
Expression source = Expression.Constant(42);
// Act
Expression result = SelectExpandBinder.CreateTypeNameExpression(source, baseType, model);
// Assert
Assert.Null(result);
}
public void CreateTypeNameExpression_ThrowsODataException_IfTypeHasNoMapping()
{
// Arrange
IEdmEntityType baseType = new EdmEntityType("NS", "BaseType");
IEdmEntityType derivedType = new EdmEntityType("NS", "DerivedType", baseType);
EdmModel model = new EdmModel();
model.AddElement(baseType);
model.AddElement(derivedType);
Expression source = Expression.Constant(42);
// Act & Assert
Assert.Throws <ODataException>(
() => SelectExpandBinder.CreateTypeNameExpression(source, baseType, model),
"The provided mapping doesn't contain an entry for the entity type 'NS.DerivedType'.");
}