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