/// <summary>
/// Gets an initialized database by its Id
/// </summary>
/// <param name="Id"></param>
/// <returns></returns>
public static InMemoryMockDatabase GetDatabase(Guid Id)
{
InMemoryMockDatabase result;
if (!databases.TryGetValue(Id, out result))
{
result = new InMemoryMockDatabase();
databases.Add(Id, result);
}
return(result);
}
/// <summary>
/// Create an instance of the given DbContext type, substituting DbSet properties
/// </summary>
/// <typeparam name="T">The DbContext type</typeparam>
/// <param name="database">The in memory database</param>
/// <param name="type">DbContext type</param>
/// <returns></returns>
public static object Create(InMemoryMockDatabase database, Type type)
{
//Check that all DbSet properties are marked as virtual:
var DbSetNotVirtualProperties =
type.GetProperties()
.Where(x => x.PropertyType.IsGenericType && x.PropertyType.GetGenericTypeDefinition() == typeof(DbSet <>) && x.CanRead)
.Where(x => !x.GetGetMethod().IsVirtual);
if (DbSetNotVirtualProperties.Any())
{
var names = DbSetNotVirtualProperties.Select(x => x.Name).Aggregate("", (a, b) => a == "" ? b : a + ", " + b);
throw new ArgumentException($"There are some DbSet properties on type {type} that are not virtual and thus the DbContextInterceptor is not able to mock it: {names}");
}
var Interceptor = new DbContextProxyInterceptor(database);
return(generator.CreateClassProxy(type, Interceptor));
}
public DbContextProxyInterceptor(InMemoryMockDatabase database)
{
this.database = database;
}
/// <summary>
/// Create an in-memory typed DbContext
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="DatabaseId">The Id of the in-memory database. Use the same Id between calls for persisting state between DbContext instances. Use null for not persisting state at all</param>
/// <param name="type">DbContext type</param>
/// <returns></returns>
public static object Create(Guid?DatabaseId, Type type)
{
var database = DatabaseId.HasValue ? InMemoryMockDatabase.GetDatabase(DatabaseId.Value) : new InMemoryMockDatabase();
return(DbContextFactory.Create(database, type));
}
