public async Task ProcessAsync_AlreadyHaveTitleThrowsInvalidOperationException()
{
// Arrange
var errorSummaryContext = new ErrorSummaryContext();
errorSummaryContext.TrySetTitle(attributes: null, new HtmlString("Existing title"));
var context = new TagHelperContext(
tagName: "govuk-error-summary-title",
allAttributes: new TagHelperAttributeList(),
items: new Dictionary <object, object>()
{
{ typeof(ErrorSummaryContext), errorSummaryContext }
},
uniqueId: "test");
var output = new TagHelperOutput(
"govuk-error-summary-title",
attributes: new TagHelperAttributeList(),
getChildContentAsync: (useCachedResult, encoder) =>
{
var tagHelperContent = new DefaultTagHelperContent();
tagHelperContent.SetContent("Some title");
return(Task.FromResult <TagHelperContent>(tagHelperContent));
});
var tagHelper = new ErrorSummaryTitleTagHelper();
// Act
var ex = await Assert.ThrowsAsync <InvalidOperationException>(() => tagHelper.ProcessAsync(context, output));
Assert.Equal("Cannot render <govuk-error-summary-title> here.", ex.Message);
}
public async Task ProcessAsync_AddsTitleToContext()
{
// Arrange
var errorSummaryContext = new ErrorSummaryContext();
var context = new TagHelperContext(
tagName: "govuk-error-summary-title",
allAttributes: new TagHelperAttributeList(),
items: new Dictionary <object, object>()
{
{ typeof(ErrorSummaryContext), errorSummaryContext }
},
uniqueId: "test");
var output = new TagHelperOutput(
"govuk-error-summary-title",
attributes: new TagHelperAttributeList(),
getChildContentAsync: (useCachedResult, encoder) =>
{
var tagHelperContent = new DefaultTagHelperContent();
tagHelperContent.SetContent("Some title");
return(Task.FromResult <TagHelperContent>(tagHelperContent));
});
var tagHelper = new ErrorSummaryTitleTagHelper();
// Act
await tagHelper.ProcessAsync(context, output);
// Assert
Assert.Equal("Some title", errorSummaryContext.Title?.content.AsString());
}