Testing:  ../src/grep Word -o -i
  input:  "WordA/wordB/WORDC/"
  output: ""
  expect: "Word/word/WORD/"
FAIL
Testing:  ../src/grep WORD -o -i
  input:  "WordA/wordB/WORDC/"
  output: ""
  expect: "Word/word/WORD/"
FAIL
Testing:  ../src/grep Word --color=always -i
  input:  "WordA/wordb/WORDC/"
  output: "WordA/wordb/WORDC/"
  expect: "WordA/wordb/WORDC/"
FAIL
Testing:  ../src/grep WORD --color=always -i
  input:  "WordA/wordb/WORDC/"
  output: "WordA/wordb/WORDC/"
  expect: "WordA/wordb/WORDC/"
FAIL