public async Task ProcessAsync_SetsValueOnContext()
{
// Arrange
var textAreaContext = new TextAreaContext();
var context = new TagHelperContext(
tagName: "govuk-textarea-value",
allAttributes: new TagHelperAttributeList(),
items: new Dictionary <object, object>()
{
{ typeof(TextAreaContext), textAreaContext }
},
uniqueId: "test");
var output = new TagHelperOutput(
"govuk-textarea-value",
attributes: new TagHelperAttributeList(),
getChildContentAsync: (useCachedResult, encoder) =>
{
var tagHelperContent = new DefaultTagHelperContent();
tagHelperContent.SetContent("Value");
return(Task.FromResult <TagHelperContent>(tagHelperContent));
});
var tagHelper = new TextAreaValueTagHelper();
// Act
await tagHelper.ProcessAsync(context, output);
// Assert
Assert.Equal("Value", textAreaContext.Value?.ToString());
}
public void SetValue_AlreadySet_ThrowsInvalidOperationException()
{
// Arrange
var context = new TextAreaContext();
context.SetValue(new HtmlString("Existing value"));
// Act
var ex = Record.Exception(() => context.SetValue(new HtmlString("Value")));
// Assert
Assert.IsType <InvalidOperationException>(ex);
Assert.Equal("Only one <govuk-textarea-value> element is permitted within each <govuk-textarea>.", ex.Message);
}
public void SetLabel_AlreadyGotValue_ThrowsInvalidOperationException()
{
// Arrange
var context = new TextAreaContext();
context.SetValue(new HtmlString("Value"));
// Act
var ex = Record.Exception(() => context.SetLabel(false, null, new HtmlString("Error")));
// Assert
Assert.IsType <InvalidOperationException>(ex);
Assert.Equal("<govuk-textarea-label> must be specified before <govuk-textarea-value>.", ex.Message);
}
