

Extending by lineboundary
Test 1, LTR:
  Extending right:    "\nabc ABC xyz DEF def\n"[(1,1), (1,20)]
  Extending left:     "\nabc ABC xyz DEF def\n"[(1,20), (1,1)]
  Extending forward:  "\nabc ABC xyz DEF def\n"[(1,1), (1,20)]
  Extending backward: "\nabc ABC xyz DEF def\n"[(1,20), (1,1)]
Test 1, RTL:
  Extending left:     "\nabc ABC xyz DEF def\n"[(1,1), (1,20)]
  Extending right:    "\nabc ABC xyz DEF def\n"[(1,20), (1,1)]
  Extending forward:  "\nabc ABC xyz DEF def\n"[(1,1), (1,20)]
  Extending backward: "\nabc ABC xyz DEF def\n"[(1,20), (1,1)]


  validating ltrRight and ltrLeft
  validating ltrRight and ltrForward
  validating ltrForward and rtlForward
  validating ltrLeft and ltrBackward
  validating ltrBackward and rtlBackward
  validating ltrRight and rtlLeft
  validating ltrLeft and rtlRight


Test 2, LTR:
  Extending right:    "\nABC xyz DEF def GHI\n"[(1,1), (1,20)]
  Extending left:     "\nABC xyz DEF def GHI\n"[(1,20), (1,1)]
  Extending forward:  "\nABC xyz DEF def GHI\n"[(1,1), (1,20)]
  Extending backward: "\nABC xyz DEF def GHI\n"[(1,20), (1,1)]
Test 2, RTL:
  Extending left:     "\nABC xyz DEF def GHI\n"[(1,1), (1,20)]
  Extending right:    "\nABC xyz DEF def GHI\n"[(1,20), (1,1)]
  Extending forward:  "\nABC xyz DEF def GHI\n"[(1,1), (1,20)]
  Extending backward: "\nABC xyz DEF def GHI\n"[(1,20), (1,1)]


  validating ltrRight and ltrLeft
  validating ltrRight and ltrForward
  validating ltrForward and rtlForward
  validating ltrLeft and ltrBackward
  validating ltrBackward and rtlBackward
  validating ltrRight and rtlLeft
  validating ltrLeft and rtlRight


Test 3, LTR:
  Extending right:    "\nABC DEF ABC\n"[(1,1), (1,12)]
  Extending left:     "\nABC DEF ABC\n"[(1,12), (1,1)]
  Extending forward:  "\nABC DEF ABC\n"[(1,1), (1,12)]
  Extending backward: "\nABC DEF ABC\n"[(1,12), (1,1)]
Test 3, RTL:
  Extending left:     "\nABC DEF ABC\n"[(1,1), (1,12)]
  Extending right:    "\nABC DEF ABC\n"[(1,12), (1,1)]
  Extending forward:  "\nABC DEF ABC\n"[(1,1), (1,12)]
  Extending backward: "\nABC DEF ABC\n"[(1,12), (1,1)]


  validating ltrRight and ltrLeft
  validating ltrRight and ltrForward
  validating ltrForward and rtlForward
  validating ltrLeft and ltrBackward
  validating ltrBackward and rtlBackward
  validating ltrRight and rtlLeft
  validating ltrLeft and rtlRight


Test 4, LTR:
  Extending right:    "\nabc efd dabeb\n"[(1,1), (1,14)]
  Extending left:     "\nabc efd dabeb\n"[(1,14), (1,1)]
  Extending forward:  "\nabc efd dabeb\n"[(1,1), (1,14)]
  Extending backward: "\nabc efd dabeb\n"[(1,14), (1,1)]
Test 4, RTL:
  Extending left:     "\nabc efd dabeb\n"[(1,1), (1,14)]
  Extending right:    "\nabc efd dabeb\n"[(1,14), (1,1)]
  Extending forward:  "\nabc efd dabeb\n"[(1,1), (1,14)]
  Extending backward: "\nabc efd dabeb\n"[(1,14), (1,1)]


  validating ltrRight and ltrLeft
  validating ltrRight and ltrForward
  validating ltrForward and rtlForward
  validating ltrLeft and ltrBackward
  validating ltrBackward and rtlBackward
  validating ltrRight and rtlLeft
  validating ltrLeft and rtlRight


Test 5, LTR:
  Extending right:    "Lorem "[(0,0)], " amet"[(0,5)]
  Extending left:     " amet"[(0,5)], "Lorem "[(0,0)]
  Extending forward:  "Lorem "[(0,0)], " amet"[(0,5)]
  Extending backward: " amet"[(0,5)], "Lorem "[(0,0)]
Test 5, RTL:
  Extending left:     "Lorem "[(0,0)], " amet"[(0,5)]
  Extending right:    " amet"[(0,5)], "Lorem "[(0,0)]
  Extending forward:  "Lorem "[(0,0)], " amet"[(0,5)]
  Extending backward: " amet"[(0,5)], "Lorem "[(0,0)]


  validating ltrRight and ltrLeft
  validating ltrRight and ltrForward
  validating ltrForward and rtlForward
  validating ltrLeft and ltrBackward
  validating ltrBackward and rtlBackward
  validating ltrRight and rtlLeft
  validating ltrLeft and rtlRight


Test 6, LTR:
  Extending right:    "Lorem "[(0,0)], " amet"[(0,5)]
  Extending left:     " amet"[(0,5)], "Lorem "[(0,0)]
  Extending forward:  "Lorem "[(0,0)], " amet"[(0,5)]
  Extending backward: " amet"[(0,5)], "Lorem "[(0,0)]
Test 6, RTL:
  Extending left:     "Lorem "[(0,0)], " amet"[(0,5)]
  Extending right:    " amet"[(0,5)], "Lorem "[(0,0)]
  Extending forward:  "Lorem "[(0,0)], " amet"[(0,5)]
  Extending backward: " amet"[(0,5)], "Lorem "[(0,0)]


  validating ltrRight and ltrLeft
  validating ltrRight and ltrForward
  validating ltrForward and rtlForward
  validating ltrLeft and ltrBackward
  validating ltrBackward and rtlBackward
  validating ltrRight and rtlLeft
  validating ltrLeft and rtlRight


Test 7, LTR:
  Extending right:    "Lorem "[(0,0)], " amet"[(0,5)]
  Extending left:     " amet"[(0,5)], "Lorem "[(0,0)]
  Extending forward:  "Lorem "[(0,0)], " amet"[(0,5)]
  Extending backward: " amet"[(0,5)], "Lorem "[(0,0)]
Test 7, RTL:
  Extending left:     "Lorem "[(0,0)], " amet"[(0,5)]
  Extending right:    " amet"[(0,5)], "Lorem "[(0,0)]
  Extending forward:  "Lorem "[(0,0)], " amet"[(0,5)]
  Extending backward: " amet"[(0,5)], "Lorem "[(0,0)]


  validating ltrRight and ltrLeft
  validating ltrRight and ltrForward
  validating ltrForward and rtlForward
  validating ltrLeft and ltrBackward
  validating ltrBackward and rtlBackward
  validating ltrRight and rtlLeft
  validating ltrLeft and rtlRight


Test 8, LTR:
  Extending right:    "Lorem "[(0,0)], " amet"[(0,5)]
  Extending left:     " amet"[(0,5)], "Lorem "[(0,0)]
  Extending forward:  "Lorem "[(0,0)], " amet"[(0,5)]
  Extending backward: " amet"[(0,5)], "Lorem "[(0,0)]
Test 8, RTL:
  Extending left:     "Lorem "[(0,0)], " amet"[(0,5)]
  Extending right:    " amet"[(0,5)], "Lorem "[(0,0)]
  Extending forward:  "Lorem "[(0,0)], " amet"[(0,5)]
  Extending backward: " amet"[(0,5)], "Lorem "[(0,0)]


  validating ltrRight and ltrLeft
  validating ltrRight and ltrForward
  validating ltrForward and rtlForward
  validating ltrLeft and ltrBackward
  validating ltrBackward and rtlBackward
  validating ltrRight and rtlLeft
  validating ltrLeft and rtlRight


Test 9, LTR:
  Extending right:    "Lorem "[(0,0), (0,5)]
  Extending left:     "Lorem "[(0,5), (0,0)]
  Extending forward:  "Lorem "[(0,0), (0,5)]
  Extending backward: "Lorem "[(0,5), (0,0)]
Test 9, RTL:
  Extending left:     "Lorem "[(0,0), (0,5)]
  Extending right:    "Lorem "[(0,5), (0,0)]
  Extending forward:  "Lorem "[(0,0), (0,5)]
  Extending backward: "Lorem "[(0,5), (0,0)]


  validating ltrRight and ltrLeft
  validating ltrRight and ltrForward
  validating ltrForward and rtlForward
  validating ltrLeft and ltrBackward
  validating ltrBackward and rtlBackward
  validating ltrRight and rtlLeft
  validating ltrLeft and rtlRight


Test 10, LTR:
  Extending right:    "Lorem "[(0,0)], " amet"[(0,5)]
  Extending left:     " amet"[(0,5)], "Lorem "[(0,0)]
  Extending forward:  "Lorem "[(0,0)], " amet"[(0,5)]
  Extending backward: " amet"[(0,5)], "Lorem "[(0,0)]
Test 10, RTL:
  Extending left:     "Lorem "[(0,0)], " amet"[(0,5)]
  Extending right:    " amet"[(0,5)], "Lorem "[(0,0)]
  Extending forward:  "Lorem "[(0,0)], " amet"[(0,5)]
  Extending backward: " amet"[(0,5)], "Lorem "[(0,0)]


  validating ltrRight and ltrLeft
  validating ltrRight and ltrForward
  validating ltrForward and rtlForward
  validating ltrLeft and ltrBackward
  validating ltrBackward and rtlBackward
  validating ltrRight and rtlLeft
  validating ltrLeft and rtlRight


Test 11, LTR:
  Extending right:    "Lorem "[(0,0)], "ipsum dolor"[(0,11)]
  Extending left:     "ipsum dolor"[(0,11)], "Lorem "[(0,0)]
  Extending forward:  "Lorem "[(0,0)], "ipsum dolor"[(0,11)]
  Extending backward: "ipsum dolor"[(0,11)], "Lorem "[(0,0)]
Test 11, RTL:
  Extending left:     "Lorem "[(0,0)], "ipsum dolor"[(0,11)]
  Extending right:    "ipsum dolor"[(0,11)], "Lorem "[(0,0)]
  Extending forward:  "Lorem "[(0,0)], "ipsum dolor"[(0,11)]
  Extending backward: "ipsum dolor"[(0,11)], "Lorem "[(0,0)]


  validating ltrRight and ltrLeft
  validating ltrRight and ltrForward
  validating ltrForward and rtlForward
  validating ltrLeft and ltrBackward
  validating ltrBackward and rtlBackward
  validating ltrRight and rtlLeft
  validating ltrLeft and rtlRight


Test 12, LTR:
  Extending right:    "Lorem "[(0,0)], " amet"[(0,5)]
  Extending left:     " amet"[(0,5)], "Lorem "[(0,0)]
  Extending forward:  "Lorem "[(0,0)], " amet"[(0,5)]
  Extending backward: " amet"[(0,5)], "Lorem "[(0,0)]
Test 12, RTL:
  Extending left:     "Lorem "[(0,0)], " amet"[(0,5)]
  Extending right:    " amet"[(0,5)], "Lorem "[(0,0)]
  Extending forward:  "Lorem "[(0,0)], " amet"[(0,5)]
  Extending backward: " amet"[(0,5)], "Lorem "[(0,0)]


  validating ltrRight and ltrLeft
  validating ltrRight and ltrForward
  validating ltrForward and rtlForward
  validating ltrLeft and ltrBackward
  validating ltrBackward and rtlBackward
  validating ltrRight and rtlLeft
  validating ltrLeft and rtlRight


Test 13, LTR:
  Extending right:    "Lorem "[(0,0), (0,5)]
  Extending left:     "Lorem "[(0,5), (0,0)]
  Extending forward:  "Lorem "[(0,0), (0,5)]
  Extending backward: "Lorem "[(0,5), (0,0)]
Test 13, RTL:
  Extending left:     "Lorem "[(0,0), (0,5)]
  Extending right:    "Lorem "[(0,5), (0,0)]
  Extending forward:  "Lorem "[(0,0), (0,5)]
  Extending backward: "Lorem "[(0,5), (0,0)]


  validating ltrRight and ltrLeft
  validating ltrRight and ltrForward
  validating ltrForward and rtlForward
  validating ltrLeft and ltrBackward
  validating ltrBackward and rtlBackward
  validating ltrRight and rtlLeft
  validating ltrLeft and rtlRight


Test 14, LTR:
  Extending right:    "\n Just\n "[(2,2)], "\n BFDX\n"[(2,6)]
  Extending left:     "\n BFDX\n"[(2,6)], "\n Just\n "[(2,2)]
  Extending forward:  "\n Just\n "[(2,2)], "\n BFDX\n"[(2,6)]
  Extending backward: "\n BFDX\n"[(2,6)], "\n Just\n "[(2,2)]
Test 14, RTL:
  Extending left:     "\n Just\n "[(2,2)], "\n BFDX\n"[(2,6)]
  Extending right:    "\n BFDX\n"[(2,6)], "\n Just\n "[(2,2)]
  Extending forward:  "\n Just\n "[(2,2)], "\n BFDX\n"[(2,6)]
  Extending backward: "\n BFDX\n"[(2,6)], "\n Just\n "[(2,2)]


  validating ltrRight and ltrLeft
  validating ltrRight and ltrForward
  validating ltrForward and rtlForward
  validating ltrLeft and ltrBackward
  validating ltrBackward and rtlBackward
  validating ltrRight and rtlLeft
  validating ltrLeft and rtlRight


Test 15, LTR:
  Extending right:    "\n Just\n "[(2,2)], "\n ever\n"[(2,6)]
  Extending left:     "\n ever\n"[(2,6)], "\n Just\n "[(2,2)]
  Extending forward:  "\n Just\n "[(2,2)], "\n ever\n"[(2,6)]
  Extending backward: "\n ever\n"[(2,6)], "\n Just\n "[(2,2)]
Test 15, RTL:
  Extending left:     "\n Just\n "[(2,2)], "\n ever\n"[(2,6)]
  Extending right:    "\n ever\n"[(2,6)], "\n Just\n "[(2,2)]
  Extending forward:  "\n Just\n "[(2,2)], "\n ever\n"[(2,6)]
  Extending backward: "\n ever\n"[(2,6)], "\n Just\n "[(2,2)]


  validating ltrRight and ltrLeft
  validating ltrRight and ltrForward
  validating ltrForward and rtlForward
  validating ltrLeft and ltrBackward
  validating ltrBackward and rtlBackward
  validating ltrRight and rtlLeft
  validating ltrLeft and rtlRight


Test 16, LTR:
  Extending right:    "car means ABC."[(0,0), (0,14)]
  Extending left:     "car means ABC."[(0,14), (0,0)]
  Extending forward:  "car means ABC."[(0,0), (0,14)]
  Extending backward: "car means ABC."[(0,14), (0,0)]
Test 16, RTL:
  Extending left:     "car means ABC."[(0,0), (0,14)]
  Extending right:    "car means ABC."[(0,14), (0,0)]
  Extending forward:  "car means ABC."[(0,0), (0,14)]
  Extending backward: "car means ABC."[(0,14), (0,0)]


  validating ltrRight and ltrLeft
  validating ltrRight and ltrForward
  validating ltrForward and rtlForward
  validating ltrLeft and ltrBackward
  validating ltrBackward and rtlBackward
  validating ltrRight and rtlLeft
  validating ltrLeft and rtlRight


Test 17, LTR:
  Extending right:    "᪜car DEF ABC.᪝"[(0,0), (0,14)]
  Extending left:     "᪜car DEF ABC.᪝"[(0,14), (0,0)]
  Extending forward:  "᪜car DEF ABC.᪝"[(0,0), (0,14)]
  Extending backward: "᪜car DEF ABC.᪝"[(0,14), (0,0)]
Test 17, RTL:
  Extending left:     "᪜car DEF ABC.᪝"[(0,0), (0,14)]
  Extending right:    "᪜car DEF ABC.᪝"[(0,14), (0,0)]
  Extending forward:  "᪜car DEF ABC.᪝"[(0,0), (0,14)]
  Extending backward: "᪜car DEF ABC.᪝"[(0,14), (0,0)]


  validating ltrRight and ltrLeft
  validating ltrRight and ltrForward
  validating ltrForward and rtlForward
  validating ltrLeft and ltrBackward
  validating ltrBackward and rtlBackward
  validating ltrRight and rtlLeft
  validating ltrLeft and rtlRight


Test 18, LTR:
  Extending right:    "he said "᪜car DEF ABC᪝.""[(0,0), (0,24)]
  Extending left:     "he said "᪜car DEF ABC᪝.""[(0,24), (0,0)]
  Extending forward:  "he said "᪜car DEF ABC᪝.""[(0,0), (0,24)]
  Extending backward: "he said "᪜car DEF ABC᪝.""[(0,24), (0,0)]
Test 18, RTL:
  Extending left:     "he said "᪜car DEF ABC᪝.""[(0,0), (0,24)]
  Extending right:    "he said "᪜car DEF ABC᪝.""[(0,24), (0,0)]
  Extending forward:  "he said "᪜car DEF ABC᪝.""[(0,0), (0,24)]
  Extending backward: "he said "᪜car DEF ABC᪝.""[(0,24), (0,0)]


  validating ltrRight and ltrLeft
  validating ltrRight and ltrForward
  validating ltrForward and rtlForward
  validating ltrLeft and ltrBackward
  validating ltrBackward and rtlBackward
  validating ltrRight and rtlLeft
  validating ltrLeft and rtlRight


Test 19, LTR:
  Extending right:    "GHI JKL MNO '᪛he said "᪜car DEF ABC᪝"᪝'?"[(0,0), (0,40)]
  Extending left:     "GHI JKL MNO '᪛he said "᪜car DEF ABC᪝"᪝'?"[(0,40), (0,0)]
  Extending forward:  "GHI JKL MNO '᪛he said "᪜car DEF ABC᪝"᪝'?"[(0,0), (0,40)]
  Extending backward: "GHI JKL MNO '᪛he said "᪜car DEF ABC᪝"᪝'?"[(0,40), (0,0)]
Test 19, RTL:
  Extending left:     "GHI JKL MNO '᪛he said "᪜car DEF ABC᪝"᪝'?"[(0,0), (0,40)]
  Extending right:    "GHI JKL MNO '᪛he said "᪜car DEF ABC᪝"᪝'?"[(0,40), (0,0)]
  Extending forward:  "GHI JKL MNO '᪛he said "᪜car DEF ABC᪝"᪝'?"[(0,0), (0,40)]
  Extending backward: "GHI JKL MNO '᪛he said "᪜car DEF ABC᪝"᪝'?"[(0,40), (0,0)]


  validating ltrRight and ltrLeft
  validating ltrRight and ltrForward
  validating ltrForward and rtlForward
  validating ltrLeft and ltrBackward
  validating ltrBackward and rtlBackward
  validating ltrRight and rtlLeft
  validating ltrLeft and rtlRight


Test 20, LTR:
  Extending right:    "ABC abc DEF"[(0,0), (0,11)]
  Extending left:     "ABC abc DEF"[(0,11), (0,0)]
  Extending forward:  "ABC abc DEF"[(0,0), (0,11)]
  Extending backward: "ABC abc DEF"[(0,11), (0,0)]
Test 20, RTL:
  Extending left:     "ABC abc DEF"[(0,0), (0,11)]
  Extending right:    "ABC abc DEF"[(0,11), (0,0)]
  Extending forward:  "ABC abc DEF"[(0,0), (0,11)]
  Extending backward: "ABC abc DEF"[(0,11), (0,0)]


  validating ltrRight and ltrLeft
  validating ltrRight and ltrForward
  validating ltrForward and rtlForward
  validating ltrLeft and ltrBackward
  validating ltrBackward and rtlBackward
  validating ltrRight and rtlLeft
  validating ltrLeft and rtlRight


Test 21, LTR:
  Extending right:    "abcdefg abcdefg abcdefg a abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg "[(0,0), (0,8)]
  Extending left:     "abcdefg abcdefg abcdefg a abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg "[(0,8), (0,0)]
  Extending forward:  "abcdefg abcdefg abcdefg a abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg "[(0,0), (0,8)]
  Extending backward: "abcdefg abcdefg abcdefg a abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg "[(0,8), (0,0)]
Test 21, RTL:
  Extending left:     "abcdefg abcdefg abcdefg a abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg "[(0,0), (0,8)]
  Extending right:    "abcdefg abcdefg abcdefg a abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg "[(0,8), (0,0)]
  Extending forward:  "abcdefg abcdefg abcdefg a abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg "[(0,0), (0,8)]
  Extending backward: "abcdefg abcdefg abcdefg a abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg "[(0,8), (0,0)]


  validating ltrRight and ltrLeft
  validating ltrRight and ltrForward
  validating ltrForward and rtlForward
  validating ltrLeft and ltrBackward
  validating ltrBackward and rtlBackward
  validating ltrRight and rtlLeft
  validating ltrLeft and rtlRight


Test 22, LTR:
  Extending right:    "abcdefg abcdefg abcdefg a abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg "[(0,0), (0,8)]
  Extending left:     "abcdefg abcdefg abcdefg a abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg "[(0,8), (0,0)]
  Extending forward:  "abcdefg abcdefg abcdefg a abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg "[(0,0), (0,8)]
  Extending backward: "abcdefg abcdefg abcdefg a abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg "[(0,8), (0,0)]
Test 22, RTL:
  Extending left:     "abcdefg abcdefg abcdefg a abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg "[(0,0), (0,8)]
  Extending right:    "abcdefg abcdefg abcdefg a abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg "[(0,8), (0,0)]
  Extending forward:  "abcdefg abcdefg abcdefg a abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg "[(0,0), (0,8)]
  Extending backward: "abcdefg abcdefg abcdefg a abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg "[(0,8), (0,0)]


  validating ltrRight and ltrLeft
  validating ltrRight and ltrForward
  validating ltrForward and rtlForward
  validating ltrLeft and ltrBackward
  validating ltrBackward and rtlBackward
  validating ltrRight and rtlLeft
  validating ltrLeft and rtlRight