def checkbox_should_be_checked(checkbox, scope={})
      in_scope(scope) do
        field_checked = find_field(checkbox)['checked']
        if !field_checked
          raise Kelp::Unexpected,
            "Expected '#{checkbox}' to be checked, but it is unchecked."
        end
      end
    end
def checkbox_should_be_checked(checkbox, scope={})
      in_scope(scope) do
        field_checked = find_field(checkbox)['checked']
        if !field_checked
          raise Kelp::Unexpected,
            "Expected '#{checkbox}' to be checked, but it is unchecked."
        end
      end
    end
Verify that the given checkbox is checked.

 @param [String] checkbox
   Capybara locator for the checkbox
 @param [Hash] scope
   Scoping keywords as understood by {#in_scope}

 @raise [Kelp::Unexpected]
   If the given checkbox is not checked

 @since 0.1.2