ensure return value of Mapping#extensions_for is unique

rtomayko · Aug 4, 2022 · deba57e · deba57e
1 parent 686cafa
commit deba57e
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Showing 2 changed files with 8 additions and 1 deletion.
diff --git a/lib/tilt/mapping.rb b/lib/tilt/mapping.rb
@@ -188,7 +188,7 @@ def extensions_for(template_class)
       lazy_map.each do |ext, choices|
         res << ext if choices.any? { |klass, file| template_class.to_s == klass }
       end
-      res
+      res.uniq
     end
 
     private

diff --git a/test/tilt_asciidoctor_test.rb b/test/tilt_asciidoctor_test.rb
@@ -24,6 +24,13 @@ def strip_space(str)
       assert_equal Tilt::AsciidoctorTemplate, Tilt['asciidoc']
     end
 
+    test "#extensions_for returns a unique list of extensions" do
+      Tilt.default_mapping.extensions_for(Tilt::AsciidoctorTemplate).each do |ext|
+        Tilt[ext]
+      end
+      assert_equal ['ad', 'adoc', 'asciidoc'], Tilt.default_mapping.extensions_for(Tilt::AsciidoctorTemplate).sort
+    end
+
     test "preparing and evaluating html5 templates on #render" do
       template = Tilt::AsciidoctorTemplate.new(:attributes => {"backend" => 'html5'}) { |t| "== Hello World!" } 
       assert_equal HTML5_OUTPUT, strip_space(template.render)