public void Constructor_Enumerable_ShouldMakeCopyOfEndpoints()
        {
            // Arrange
            var endpoint1 = new Endpoint(TestConstants.EmptyRequestDelegate, EndpointMetadataCollection.Empty, "1");
            var endpoint2 = new Endpoint(TestConstants.EmptyRequestDelegate, EndpointMetadataCollection.Empty, "2");
            var endpoints = new List <Endpoint> {
                endpoint1, endpoint2
            };

            // Act
            var dataSource = new DefaultEndpointDataSource((IEnumerable <Endpoint>)endpoints);

            endpoints.RemoveAt(0);
            endpoints[0] = null;

            // Assert
            Assert.Equal(2, dataSource.Endpoints.Count);
            Assert.Contains(endpoint1, dataSource.Endpoints);
            Assert.Contains(endpoint2, dataSource.Endpoints);
        }