Add tests for fileUtils call in system

1 files changed, 21 insertions, 0 deletions

diff --git a/Library/Homebrew/test/rubocops/lines_cop_spec.rb b/Library/Homebrew/test/rubocops/lines_cop_spec.rb
index 203f8a7d9..1af5d2e72 100644
--- a/Library/Homebrew/test/rubocops/lines_cop_spec.rb
+++ b/Library/Homebrew/test/rubocops/lines_cop_spec.rb
@@ -575,6 +575,27 @@ describe RuboCop::Cop::FormulaAudit::Miscellaneous do
         expect_offense(expected, actual)
       end
     end
+    it "with system call to fileUtils Method" do
+      source = <<-EOS.undent
+        class Foo < Formula
+          desc "foo"
+          url 'http://example.com/foo-1.0.tgz'
+          system "mkdir", "foo"
+        end
+      EOS
+
+      expected_offenses = [{  message: "Use the `mkdir` Ruby method instead of `system \"mkdir\", \"foo\"`",
+                              severity: :convention,
+                              line: 4,
+                              column: 10,
+                              source: source }]
+
+      inspect_source(cop, source)
+
+      expected_offenses.zip(cop.offenses).each do |expected, actual|
+        expect_offense(expected, actual)
+      end
+    end
   end
   def expect_offense(expected, actual)
     expect(actual.message).to eq(expected[:message])