public async Task GetDescriptionAsync_DoesNotAddDescriptionWhenPropertyAbsent()
        {
            // Arrange
            var document             = CreateDocument();
            var item                 = CompletionItem.Create("TestDirective");
            var codeDocumentProvider = new Mock <RazorCodeDocumentProvider>();
            var completionProvider   = new RazorDirectiveCompletionProvider(new Lazy <RazorCodeDocumentProvider>(() => codeDocumentProvider.Object));

            // Act
            var description = await completionProvider.GetDescriptionAsync(document, item, CancellationToken.None);

            // Assert
            Assert.Empty(description.TaggedParts);
            Assert.Equal(string.Empty, description.Text);
        }
        public async Task GetDescriptionAsync_AddsDirectiveDescriptionIfPropertyExists()
        {
            // Arrange
            var document            = CreateDocument();
            var expectedDescription = "The expected description";
            var item = CompletionItem.Create("TestDirective")
                       .WithProperties((new Dictionary <string, string>()
            {
                [RazorDirectiveCompletionProvider.DescriptionKey] = expectedDescription,
            }).ToImmutableDictionary());
            var codeDocumentProvider = new Mock <RazorCodeDocumentProvider>();
            var completionProvider   = new RazorDirectiveCompletionProvider(new Lazy <RazorCodeDocumentProvider>(() => codeDocumentProvider.Object));

            // Act
            var description = await completionProvider.GetDescriptionAsync(document, item, CancellationToken.None);

            // Assert
            var part = Assert.Single(description.TaggedParts);

            Assert.Equal(TextTags.Text, part.Tag);
            Assert.Equal(expectedDescription, part.Text);
            Assert.Equal(expectedDescription, description.Text);
        }