public static MockedDbContext <T> GetMockedDbContext <T>() where T : DbContext
{
var instance = new MockedDbContext <T>();
instance.MockTables();
return(instance);
}
public static void MockTables <T>(this MockedDbContext <T> mockedContext) where T : DbContext
{
var contextType = typeof(T);
var dbSetProperties = contextType.GetProperties().Where(prop =>
prop.PropertyType.IsGenericType && prop.PropertyType.GetGenericTypeDefinition() == typeof(DbSet <>));
foreach (var prop in dbSetProperties)
{
var dbSetGenericType = prop.PropertyType.GetGenericArguments()[0];
var listType = typeof(List <>).MakeGenericType(dbSetGenericType);
var listForFakeTable = Activator.CreateInstance(listType);
var parameter = Expression.Parameter(contextType);
var body = Expression.PropertyOrField(parameter, prop.Name);
var lambdaExpression = Expression.Lambda <Func <T, object> >(body, parameter);
var method = typeof(EntityFrameworkMockHelper).GetMethod("MockDbSet")
?.MakeGenericMethod(dbSetGenericType);
if (method == null)
{
throw new InvalidOperationException();
}
mockedContext.Setup(lambdaExpression).Returns(method.Invoke(null, new[] { listForFakeTable }));
mockedContext.Tables.Add(prop.Name, listForFakeTable);
}
}
public OrderHandlerTests()
{
eventContext = new EventProvider();
var mockOrderContext = new MockedDbContext <OrderContext>();
projectionContext = new ProjectionProvider();
mockOrderContext.MockTables();
orderContext = mockOrderContext.Object;
var mappingConfig = new MappingConfig();
orderHandler = new OrderHandler(mappingConfig.Mapper, mockOrderContext.Object, eventContext, projectionContext);
mappingTestConfig = new MappingTestConfig();
}