test output

  1) Counter outputs the 'File checked' output
     Failure/Error: expect { subject.call }.to output("File checked: test_files/test-1.txt").to_stdout
       expected block to output "File checked: test_files/test-1.txt" to stdout, but output "File checked: test_files/another-test.txt\nRange: 1000..10000\nPalindromes: 90\n========================\n\nFile checked: test_files/example.txt\nRange: 1..100\nPalindromes: 18\n========================\n\nFile checked: test_files/test-1.txt\nRange: 1034567..2888888\nPalindromes: 1854\n========================\n\nFile checked: test_files/test-2.txt\nRange: 11200000..11300000\nPalindromes: 10\n========================\n\n"
       Diff:

       @@ -1,2 +1,20 @@
       +File checked: test_files/another-test.txt
       +Range: 1000..10000
       +Palindromes: 90
       +========================
       +
       +File checked: test_files/example.txt
       +Range: 1..100
       +Palindromes: 18
       +========================
       +
        File checked: test_files/test-1.txt
       +Range: 1034567..2888888
       +Palindromes: 1854
       +========================
       +
       +File checked: test_files/test-2.txt
       +Range: 11200000..11300000
       +Palindromes: 10
       +========================

     # ./spec/counter_spec.rb:8:in `block (2 levels) in <top (required)>'

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1 example, 1 failure