public void ConstructorSetsViewEngineAndViewEngineType()
        {
            // Arrange
            var viewEngine = new TestValueProviderFactory();

            // Act
            var descriptor = new ValueProviderFactoryDescriptor(viewEngine);

            // Assert
            Assert.Same(viewEngine, descriptor.Instance);
            Assert.Equal(viewEngine.GetType(), descriptor.OptionType);
        }
        public void ConstructorSetsViewEngineType()
        {
            // Arrange
            var type = typeof(TestValueProviderFactory);

            // Act
            var descriptor = new ValueProviderFactoryDescriptor(type);

            // Assert
            Assert.Equal(type, descriptor.OptionType);
            Assert.Null(descriptor.Instance);
        }