public async Task ProcessAsync_AspForSpecifiedForDateField_GeneratesHrefForDateComponentFromModelExpression()
{
// Arrange
var errorSummaryContext = new ErrorSummaryContext();
var context = new TagHelperContext(
tagName: "govuk-error-summary-item",
allAttributes: new TagHelperAttributeList(),
items: new Dictionary <object, object>()
{
{ typeof(ErrorSummaryContext), errorSummaryContext }
},
uniqueId: "test");
var output = new TagHelperOutput(
"govuk-error-summary-item",
attributes: new TagHelperAttributeList(),
getChildContentAsync: (useCachedResult, encoder) =>
{
var tagHelperContent = new DefaultTagHelperContent();
return(Task.FromResult <TagHelperContent>(tagHelperContent));
});
output.TagMode = TagMode.SelfClosing;
var modelExplorer = new EmptyModelMetadataProvider().GetModelExplorerForType(typeof(Model), new Model())
.GetExplorerForProperty(nameof(Model.Date));
var viewContext = new ViewContext();
var options = Options.Create(new GovUkFrontendAspNetCoreOptions());
var dateInputParseErrorsProvider = new DateInputParseErrorsProvider();
var modelName = nameof(Model.Date);
viewContext.ModelState.AddModelError(modelName, "ModelState error message");
dateInputParseErrorsProvider.SetErrorsForModel(modelName, DateInputParseErrors.InvalidMonth | DateInputParseErrors.MissingYear);
var tagHelper = new ErrorSummaryItemTagHelper(options, dateInputParseErrorsProvider)
{
AspFor = new ModelExpression(nameof(Model.Date), modelExplorer),
ViewContext = viewContext
};
// Act
await tagHelper.ProcessAsync(context, output);
// Assert
Assert.Collection(
errorSummaryContext.Items,
item =>
{
Assert.Equal("#Date.Month", item.Href);
});
}
