add test to extract class names from haml file correctly

Author: Wolfram Nikolas Müller

test/purger_test.rb

@@ -1,12 +1,12 @@
 require "test_helper"
 
 class Tailwindcss::PurgerTest < ActiveSupport::TestCase
-  test "extract class names from string" do
+  test "extract class names from erb string" do
     assert_equal %w[ div class max-w-7xl mx-auto my-1.5 px-4 sm:px-6 lg:px-8 sm:py-0.5 translate-x-1/2 ].sort,
       Tailwindcss::Purger.extract_class_names(%(<div class="max-w-7xl mx-auto my-1.5 px-4 sm:px-6 lg:px-8 sm:py-0.5 translate-x-1/2">))
   end
 
-  test "extract class names from files" do
+  test "extract class names from erb file" do
     assert_equal %w[ div class max-w-7xl mx-auto my-1.5 px-4 sm:px-6 lg:px-8 sm:py-0.5 translate-x-1/2 ].sort,
       Tailwindcss::Purger.extract_class_names_from(Pathname.new(__dir__).join("fixtures/simple.html.erb"))
   end
@@ -16,6 +16,11 @@ class Tailwindcss::PurgerTest < ActiveSupport::TestCase
       Tailwindcss::Purger.extract_class_names(%(.max-w-7xl.mx-auto.px-4.sm:px-6.lg:px-8{:class => "my-1.5 sm:py-0.5 translate-x-1/2"}))
   end
 
+  test "extract class names from haml file" do
+    assert_equal %w[ class max-w-7xl mx-auto my-1.5 px-4 sm:px-6 lg:px-8 sm:py-0.5 translate-x-1/2 ].sort,
+      Tailwindcss::Purger.extract_class_names_from(Pathname.new(__dir__).join("fixtures/simple.html.haml"))
+  end
+
   test "basic purge" do
     purged = purged_tailwind_from_erb_fixtures