audit: add autocorrect and tests for test checks

Library/Homebrew/rubocops/class_cop.rb

@@ -39,6 +39,17 @@ module RuboCop
           end
         end
 
+        def autocorrect(node)
+          lambda do |corrector|
+            case node.type
+            when :str, :dstr
+              corrector.replace(node.source_range, node.source.to_s.sub(%r{(/usr/local/(s?bin))}, '#{\2}'))
+            when :int
+              corrector.remove(range_with_surrounding_comma(range_with_surrounding_space(range: node.source_range, side: :left)))
+            end
+          end
+        end
+
         def_node_search :test_calls, <<~EOS
           (send nil? ${:system :shell_output :pipe_output} $...)
         EOS

Library/Homebrew/test/rubocops/class_cop_spec.rb

@@ -76,6 +76,31 @@ describe RuboCop::Cop::FormulaAudit::TestCalls do
       end
     RUBY
   end
+
+  it "supports auto-correcting test calls" do
+    source = <<~RUBY
+      class Foo < Formula
+        url 'https://example.com/foo-1.0.tgz'
+
+        test do
+          shell_output("/usr/local/sbin/test", 0)
+        end
+      end
+    RUBY
+
+    corrected_source = <<~RUBY
+      class Foo < Formula
+        url 'https://example.com/foo-1.0.tgz'
+
+        test do
+          shell_output("\#{sbin}/test")
+        end
+      end
+    RUBY
+
+    new_source = autocorrect_source(source)
+    expect(new_source).to eq(corrected_source)
+  end
 end
 
 describe RuboCop::Cop::FormulaAuditStrict::Test do