Exclude html entities from haml lint

changelogs/unreleased/exclude_html_entities_from_haml_lint.yml

+---
+title: Exclude html entities from haml lint
+merge_request: 29847
+author: Lee Tickett
+type: fixed

haml_lint/linter/no_plain_nodes.rb

@@ -51,6 +51,7 @@ module HamlLint
         attributes = node.attributes_source.map(&:last)
         attributes.each { |attribute| text = text.gsub(attribute, '') }
 
+        text = strip_html_entities(text)
         text.strip
       end
 
@@ -77,7 +78,12 @@ module HamlLint
       def text_node?(node)
         return false unless plain_node?(node)
 
-        !node.text.empty?
+        text = strip_html_entities(node.text)
+        !text.empty?
+      end
+
+      def strip_html_entities(text)
+        text.gsub(/&([a-z0-9]+|#[0-9]{1,6}|#x[0-9a-f]{1,6});/i, "")
       end
     end
   end

spec/haml_lint/linter/no_plain_nodes_spec.rb

@@ -53,4 +53,42 @@ describe HamlLint::Linter::NoPlainNodes do
 
     it { is_expected.to report_lint count: 3 }
   end
+
+  context 'does not report when a html entity' do
+    let(:haml) { '%tag  ' }
+
+    it { is_expected.not_to report_lint }
+  end
+
+  context 'does report when something that looks like a html entity' do
+    let(:haml) { '%tag &some text;' }
+
+    it { is_expected.to report_lint }
+  end
+
+  context 'does not report multiline when one or more html entities' do
+    %w( > © »).each do |elem|
+      let(:haml) { <<-HAML }
+        %tag
+          #{elem}
+      HAML
+
+      it elem do
+        is_expected.not_to report_lint
+      end
+    end
+  end
+
+  context 'does report multiline when one or more html entities amidst plain text' do
+    %w(&nbsp;Test Test&gt; &#x000A9;Hello &nbsp;Hello&#187;).each do |elem|
+      let(:haml) { <<-HAML }
+        %tag
+          #{elem}
+      HAML
+
+      it elem do
+        is_expected.to report_lint
+      end
+    end
+  end
 end