public async Task ProcessAsync_LabelNotSpecifiedThrowsInvalidOperationException()
{
// Arrange
var context = new TagHelperContext(
tagName: "govuk-tabs-item",
allAttributes: new TagHelperAttributeList(),
items: new Dictionary <object, object>(),
uniqueId: "test");
var tabsContext = new TabsContext(idPrefix: null);
context.Items.Add(typeof(TabsContext), tabsContext);
var output = new TagHelperOutput(
"govuk-tabs-item",
attributes: new TagHelperAttributeList(),
getChildContentAsync: (useCachedResult, encoder) =>
{
var tagHelperContent = new DefaultTagHelperContent();
return(Task.FromResult <TagHelperContent>(tagHelperContent));
});
var tagHelper = new TabsItemTagHelper()
{
};
// Act & Assert
var ex = await Assert.ThrowsAsync <InvalidOperationException>(() => tagHelper.ProcessAsync(context, output));
Assert.Equal("The 'label' attribute must be specified.", ex.Message);
}
public async Task ProcessAsync_NoIdSpecifiedUsesIdDerivedFromPrefixAndIndex()
{
// Arrange
var context = new TagHelperContext(
tagName: "govuk-tabs-item",
allAttributes: new TagHelperAttributeList(),
items: new Dictionary <object, object>(),
uniqueId: "test");
var tabsContext = new TabsContext(idPrefix: "myprefix");
tabsContext.AddItem(new TabsItem()
{
Id = "first",
Label = "First",
PanelContent = new HtmlString("First panel content")
});
tabsContext.AddItem(new TabsItem()
{
Id = "second",
Label = "Second",
PanelContent = new HtmlString("Second panel content")
});
context.Items.Add(typeof(TabsContext), tabsContext);
var output = new TagHelperOutput(
"govuk-tabs-item",
attributes: new TagHelperAttributeList(),
getChildContentAsync: (useCachedResult, encoder) =>
{
var tagHelperContent = new DefaultTagHelperContent();
return(Task.FromResult <TagHelperContent>(tagHelperContent));
});
var tagHelper = new TabsItemTagHelper()
{
Label = "Third"
};
// Act
await tagHelper.ProcessAsync(context, output);
// Assert
Assert.Equal("myprefix-2", tabsContext.Items.Last().Id);
}