public async Task ProcessAsync_ParentAlreadyHasLegend_ThrowsInvalidOperationException()
{
// Arrange
var fieldsetContext = new FieldsetContext();
fieldsetContext.SetLegend(
isPageHeading: false,
attributes: null,
content: new HtmlString("Existing legend"));
var context = new TagHelperContext(
tagName: "govuk-fieldset-legend",
allAttributes: new TagHelperAttributeList(),
items: new Dictionary <object, object>()
{
{ typeof(FieldsetContext), fieldsetContext }
},
uniqueId: "test");
var output = new TagHelperOutput(
"govuk-fieldset-legend",
attributes: new TagHelperAttributeList(),
getChildContentAsync: (useCachedResult, encoder) =>
{
var tagHelperContent = new DefaultTagHelperContent();
tagHelperContent.SetContent("Legend content");
return(Task.FromResult <TagHelperContent>(tagHelperContent));
});
var tagHelper = new FieldsetLegendTagHelper()
{
IsPageHeading = true
};
// Act
var ex = await Record.ExceptionAsync(() => tagHelper.ProcessAsync(context, output));
// Assert
Assert.IsType <InvalidOperationException>(ex);
Assert.Equal("Only one <govuk-fieldset-legend> element is permitted within each <govuk-fieldset>.", ex.Message);
}
public async Task ProcessAsync_AddsLegendToContext()
{
// Arrange
var fieldsetContext = new FieldsetContext();
var context = new TagHelperContext(
tagName: "govuk-fieldset-legend",
allAttributes: new TagHelperAttributeList(),
items: new Dictionary <object, object>()
{
{ typeof(FieldsetContext), fieldsetContext }
},
uniqueId: "test");
var output = new TagHelperOutput(
"govuk-fieldset-legend",
attributes: new TagHelperAttributeList(),
getChildContentAsync: (useCachedResult, encoder) =>
{
var tagHelperContent = new DefaultTagHelperContent();
tagHelperContent.SetContent("Legend content");
return(Task.FromResult <TagHelperContent>(tagHelperContent));
});
var tagHelper = new FieldsetLegendTagHelper()
{
IsPageHeading = true
};
// Act
await tagHelper.ProcessAsync(context, output);
// Assert
Assert.Equal("Legend content", fieldsetContext.Legend?.Content.RenderToString());
Assert.True(fieldsetContext.Legend?.IsPageHeading);
}
