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WCAG validator for the NLdoc specification.
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lib/nldoc/validation/rules/empty_heading.ex
defmodule NLdoc.Validation.Rules.EmptyHeading do
@moduledoc """
This rule validates that a heading must always contain discernible text.
"""
alias NLdoc.Spec.{Content, Heading}
alias NLdoc.Validation.Severity
use NLdoc.Validation.Rule,
severity: Severity.error(),
rule: "empty-heading",
ruleset: "https://dequeuniversity.com/rules/axe/html",
ruleset_version: "4.10",
validates: [Heading]
@impl true
def valid?(resource = %Heading{}, _),
do: resource |> Content.discernible_text?()
end