public async Task ProcessAsync_RowAlreadyHasValueThrowsInvalidOperationException()
{
// Arrange
var summaryListContext = new SummaryListContext();
var rowContext = new SummaryListRowContext();
rowContext.TrySetValue(new HtmlString("Existing value"));
var context = new TagHelperContext(
tagName: "govuk-summary-list-row-value",
allAttributes: new TagHelperAttributeList(),
items: new Dictionary <object, object>()
{
{ typeof(SummaryListContext), summaryListContext },
{ typeof(SummaryListRowContext), rowContext }
},
uniqueId: "test");
var output = new TagHelperOutput(
"govuk-summary-list-row-value",
attributes: new TagHelperAttributeList(),
getChildContentAsync: (useCachedResult, encoder) =>
{
var tagHelperContent = new DefaultTagHelperContent();
tagHelperContent.SetContent("Value content");
return(Task.FromResult <TagHelperContent>(tagHelperContent));
});
var tagHelper = new SummaryListRowValueTagHelper();
// Act & Assert
var ex = await Assert.ThrowsAsync <InvalidOperationException>(() => tagHelper.ProcessAsync(context, output));
Assert.Equal("Cannot render <govuk-summary-list-row-value> here.", ex.Message);
}
