public void SetPrefix_AlreadySet_ThrowsInvalidOperationException()
{
// Arrange
var context = new TextInputContext();
context.SetPrefix(attributes: null, content: new HtmlString("Existing prefix"));
// Act
var ex = Record.Exception(() => context.SetPrefix(null, new HtmlString("Prefix")));
// Assert
Assert.IsType <InvalidOperationException>(ex);
Assert.Equal("Only one <govuk-input-prefix> element is permitted within each <govuk-input>.", ex.Message);
}
public void SetLabel_AlreadyGotPrefix_ThrowsInvalidOperationException()
{
// Arrange
var context = new TextInputContext();
context.SetPrefix(attributes: null, content: new HtmlString("Prefix"));
// Act
var ex = Record.Exception(() => context.SetLabel(false, null, new HtmlString("Error")));
// Assert
Assert.IsType <InvalidOperationException>(ex);
Assert.Equal("<govuk-input-label> must be specified before <govuk-input-prefix>.", ex.Message);
}