#all_extensions already includes primary extension

lib/linguist/language.rb

@@ -413,6 +413,9 @@ module Linguist
     # Returns the extensions Array
     attr_reader :extensions
 
+    # DEPRECATED: Will be removed in 5.x
+    alias_method :all_extensions, :extensions
+
     # Public: Get interpreters
     #
     # Examples
@@ -431,11 +434,6 @@ module Linguist
     # Returns the extensions Array
     attr_reader :filenames
 
-    # Public: Return all possible extensions for language
-    def all_extensions
-      (extensions + [primary_extension]).uniq
-    end
-
     # Deprecated: Get primary extension
     #
     # Defaults to the first extension but can be overridden

test/test_samples.rb

@@ -57,8 +57,8 @@ class TestSamples < Test::Unit::TestCase
   # If a language extension isn't globally unique then make sure there are samples
   Linguist::Language.all.each do |language|
     define_method "test_#{language.name}_has_samples" do
-      language.all_extensions.each do |extension|
-        language_matches = Language.find_by_filename("foo#{extension}")
+      language.extensions.each do |extension|
+        language_matches = Language.find_by_extension(extension)
 
         # Check for samples if more than one language matches the given extension.
         if language_matches.length > 1