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diff --git a/src/testdir/test_arabic.vim b/src/testdir/test_arabic.vim
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+" Simplistic testing of Arabic mode.
+" NOTE: This just checks if the code works. If you know Arabic please add
+" functional tests that check the shaping works with real text.
+
+source check.vim
+CheckFeature arabic
+
+source view_util.vim
+
+" Return list of Unicode characters at line lnum.
+" Combining characters are treated as a single item.
+func s:get_chars(lnum)
+ call cursor(a:lnum, 1)
+ let chars = []
+ let numchars = strchars(getline('.'), 1)
+ for i in range(1, numchars)
+ exe 'norm ' i . '|'
+ let c = execute('ascii')
+ let c = substitute(c, '\n\?<.\{-}Hex\s*', 'U+', 'g')
+ let c = substitute(c, ',\s*Oct\(al\)\=\s\d*\(, Digr ..\)\=', '', 'g')
+ call add(chars, c)
+ endfor
+ return chars
+endfunc
+
+func Test_arabic_toggle()
+ set arabic
+ call assert_equal(1, &rightleft)
+ call assert_equal(1, &arabicshape)
+ call assert_equal('arabic', &keymap)
+ call assert_equal(1, &delcombine)
+
+ set iminsert=1 imsearch=1
+ set arabic&
+ call assert_equal(0, &rightleft)
+ call assert_equal(1, &arabicshape)
+ call assert_equal('arabic', &keymap)
+ call assert_equal(1, &delcombine)
+ call assert_equal(0, &iminsert)
+ call assert_equal(-1, &imsearch)
+
+ set arabicshape& keymap= delcombine&
+endfunc
+
+func Test_arabic_input()
+ new
+ set arabic
+ " Typing sghl in Arabic insert mode should show the
+ " Arabic word 'Salaam' i.e. 'peace', spelled:
+ " SEEN, LAM, ALEF, MEEM.
+ " See: https://www.mediawiki.org/wiki/VisualEditor/Typing/Right-to-left
+ call feedkeys('isghl!', 'tx')
+ call assert_match("^ *!\uFEE1\uFEFC\uFEB3$", ScreenLines(1, &columns)[0])
+ call assert_equal([
+ \ 'U+0633',
+ \ 'U+0644 U+0627',
+ \ 'U+0645',
+ \ 'U+21'], s:get_chars(1))
+
+ " Without shaping, it should give individual Arabic letters.
+ set noarabicshape
+ call assert_match("^ *!\u0645\u0627\u0644\u0633$", ScreenLines(1, &columns)[0])
+ call assert_equal([
+ \ 'U+0633',
+ \ 'U+0644',
+ \ 'U+0627',
+ \ 'U+0645',
+ \ 'U+21'], s:get_chars(1))
+
+ set arabic& arabicshape&
+ bwipe!
+endfunc
+
+func Test_arabic_toggle_keymap()
+ new
+ set arabic
+ call feedkeys("i12\<C-^>12\<C-^>12", 'tx')
+ call assert_match("^ *٢١21٢١$", ScreenLines(1, &columns)[0])
+ call assert_equal('١٢12١٢', getline('.'))
+ set arabic&
+ bwipe!
+endfunc
+
+func Test_delcombine()
+ new
+ set arabic
+ call feedkeys("isghl\<BS>\<BS>", 'tx')
+ call assert_match("^ *\uFEDE\uFEB3$", ScreenLines(1, &columns)[0])
+ call assert_equal(['U+0633', 'U+0644'], s:get_chars(1))
+
+ " Now the same with 'nodelcombine'
+ set nodelcombine
+ %d
+ call feedkeys("isghl\<BS>\<BS>", 'tx')
+ call assert_match("^ *\uFEB1$", ScreenLines(1, &columns)[0])
+ call assert_equal(['U+0633'], s:get_chars(1))
+ set arabic&
+ bwipe!
+endfunc
+
+" Values from src/arabic.h (not all used yet)
+let s:a_COMMA = "\u060C"
+let s:a_SEMICOLON = "\u061B"
+let s:a_QUESTION = "\u061F"
+let s:a_HAMZA = "\u0621"
+let s:a_ALEF_MADDA = "\u0622"
+let s:a_ALEF_HAMZA_ABOVE = "\u0623"
+let s:a_WAW_HAMZA = "\u0624"
+let s:a_ALEF_HAMZA_BELOW = "\u0625"
+let s:a_YEH_HAMZA = "\u0626"
+let s:a_ALEF = "\u0627"
+let s:a_BEH = "\u0628"
+let s:a_TEH_MARBUTA = "\u0629"
+let s:a_TEH = "\u062a"
+let s:a_THEH = "\u062b"
+let s:a_JEEM = "\u062c"
+let s:a_HAH = "\u062d"
+let s:a_KHAH = "\u062e"
+let s:a_DAL = "\u062f"
+let s:a_THAL = "\u0630"
+let s:a_REH = "\u0631"
+let s:a_ZAIN = "\u0632"
+let s:a_SEEN = "\u0633"
+let s:a_SHEEN = "\u0634"
+let s:a_SAD = "\u0635"
+let s:a_DAD = "\u0636"
+let s:a_TAH = "\u0637"
+let s:a_ZAH = "\u0638"
+let s:a_AIN = "\u0639"
+let s:a_GHAIN = "\u063a"
+let s:a_TATWEEL = "\u0640"
+let s:a_FEH = "\u0641"
+let s:a_QAF = "\u0642"
+let s:a_KAF = "\u0643"
+let s:a_LAM = "\u0644"
+let s:a_MEEM = "\u0645"
+let s:a_NOON = "\u0646"
+let s:a_HEH = "\u0647"
+let s:a_WAW = "\u0648"
+let s:a_ALEF_MAKSURA = "\u0649"
+let s:a_YEH = "\u064a"
+
+let s:a_FATHATAN = "\u064b"
+let s:a_DAMMATAN = "\u064c"
+let s:a_KASRATAN = "\u064d"
+let s:a_FATHA = "\u064e"
+let s:a_DAMMA = "\u064f"
+let s:a_KASRA = "\u0650"
+let s:a_SHADDA = "\u0651"
+let s:a_SUKUN = "\u0652"
+
+let s:a_MADDA_ABOVE = "\u0653"
+let s:a_HAMZA_ABOVE = "\u0654"
+let s:a_HAMZA_BELOW = "\u0655"
+
+let s:a_ZERO = "\u0660"
+let s:a_ONE = "\u0661"
+let s:a_TWO = "\u0662"
+let s:a_THREE = "\u0663"
+let s:a_FOUR = "\u0664"
+let s:a_FIVE = "\u0665"
+let s:a_SIX = "\u0666"
+let s:a_SEVEN = "\u0667"
+let s:a_EIGHT = "\u0668"
+let s:a_NINE = "\u0669"
+let s:a_PERCENT = "\u066a"
+let s:a_DECIMAL = "\u066b"
+let s:a_THOUSANDS = "\u066c"
+let s:a_STAR = "\u066d"
+let s:a_MINI_ALEF = "\u0670"
+
+let s:a_s_FATHATAN = "\ufe70"
+let s:a_m_TATWEEL_FATHATAN = "\ufe71"
+let s:a_s_DAMMATAN = "\ufe72"
+
+let s:a_s_KASRATAN = "\ufe74"
+
+let s:a_s_FATHA = "\ufe76"
+let s:a_m_FATHA = "\ufe77"
+let s:a_s_DAMMA = "\ufe78"
+let s:a_m_DAMMA = "\ufe79"
+let s:a_s_KASRA = "\ufe7a"
+let s:a_m_KASRA = "\ufe7b"
+let s:a_s_SHADDA = "\ufe7c"
+let s:a_m_SHADDA = "\ufe7d"
+let s:a_s_SUKUN = "\ufe7e"
+let s:a_m_SUKUN = "\ufe7f"
+
+let s:a_s_HAMZA = "\ufe80"
+let s:a_s_ALEF_MADDA = "\ufe81"
+let s:a_f_ALEF_MADDA = "\ufe82"
+let s:a_s_ALEF_HAMZA_ABOVE = "\ufe83"
+let s:a_f_ALEF_HAMZA_ABOVE = "\ufe84"
+let s:a_s_WAW_HAMZA = "\ufe85"
+let s:a_f_WAW_HAMZA = "\ufe86"
+let s:a_s_ALEF_HAMZA_BELOW = "\ufe87"
+let s:a_f_ALEF_HAMZA_BELOW = "\ufe88"
+let s:a_s_YEH_HAMZA = "\ufe89"
+let s:a_f_YEH_HAMZA = "\ufe8a"
+let s:a_i_YEH_HAMZA = "\ufe8b"
+let s:a_m_YEH_HAMZA = "\ufe8c"
+let s:a_s_ALEF = "\ufe8d"
+let s:a_f_ALEF = "\ufe8e"
+let s:a_s_BEH = "\ufe8f"
+let s:a_f_BEH = "\ufe90"
+let s:a_i_BEH = "\ufe91"
+let s:a_m_BEH = "\ufe92"
+let s:a_s_TEH_MARBUTA = "\ufe93"
+let s:a_f_TEH_MARBUTA = "\ufe94"
+let s:a_s_TEH = "\ufe95"
+let s:a_f_TEH = "\ufe96"
+let s:a_i_TEH = "\ufe97"
+let s:a_m_TEH = "\ufe98"
+let s:a_s_THEH = "\ufe99"
+let s:a_f_THEH = "\ufe9a"
+let s:a_i_THEH = "\ufe9b"
+let s:a_m_THEH = "\ufe9c"
+let s:a_s_JEEM = "\ufe9d"
+let s:a_f_JEEM = "\ufe9e"
+let s:a_i_JEEM = "\ufe9f"
+let s:a_m_JEEM = "\ufea0"
+let s:a_s_HAH = "\ufea1"
+let s:a_f_HAH = "\ufea2"
+let s:a_i_HAH = "\ufea3"
+let s:a_m_HAH = "\ufea4"
+let s:a_s_KHAH = "\ufea5"
+let s:a_f_KHAH = "\ufea6"
+let s:a_i_KHAH = "\ufea7"
+let s:a_m_KHAH = "\ufea8"
+let s:a_s_DAL = "\ufea9"
+let s:a_f_DAL = "\ufeaa"
+let s:a_s_THAL = "\ufeab"
+let s:a_f_THAL = "\ufeac"
+let s:a_s_REH = "\ufead"
+let s:a_f_REH = "\ufeae"
+let s:a_s_ZAIN = "\ufeaf"
+let s:a_f_ZAIN = "\ufeb0"
+let s:a_s_SEEN = "\ufeb1"
+let s:a_f_SEEN = "\ufeb2"
+let s:a_i_SEEN = "\ufeb3"
+let s:a_m_SEEN = "\ufeb4"
+let s:a_s_SHEEN = "\ufeb5"
+let s:a_f_SHEEN = "\ufeb6"
+let s:a_i_SHEEN = "\ufeb7"
+let s:a_m_SHEEN = "\ufeb8"
+let s:a_s_SAD = "\ufeb9"
+let s:a_f_SAD = "\ufeba"
+let s:a_i_SAD = "\ufebb"
+let s:a_m_SAD = "\ufebc"
+let s:a_s_DAD = "\ufebd"
+let s:a_f_DAD = "\ufebe"
+let s:a_i_DAD = "\ufebf"
+let s:a_m_DAD = "\ufec0"
+let s:a_s_TAH = "\ufec1"
+let s:a_f_TAH = "\ufec2"
+let s:a_i_TAH = "\ufec3"
+let s:a_m_TAH = "\ufec4"
+let s:a_s_ZAH = "\ufec5"
+let s:a_f_ZAH = "\ufec6"
+let s:a_i_ZAH = "\ufec7"
+let s:a_m_ZAH = "\ufec8"
+let s:a_s_AIN = "\ufec9"
+let s:a_f_AIN = "\ufeca"
+let s:a_i_AIN = "\ufecb"
+let s:a_m_AIN = "\ufecc"
+let s:a_s_GHAIN = "\ufecd"
+let s:a_f_GHAIN = "\ufece"
+let s:a_i_GHAIN = "\ufecf"
+let s:a_m_GHAIN = "\ufed0"
+let s:a_s_FEH = "\ufed1"
+let s:a_f_FEH = "\ufed2"
+let s:a_i_FEH = "\ufed3"
+let s:a_m_FEH = "\ufed4"
+let s:a_s_QAF = "\ufed5"
+let s:a_f_QAF = "\ufed6"
+let s:a_i_QAF = "\ufed7"
+let s:a_m_QAF = "\ufed8"
+let s:a_s_KAF = "\ufed9"
+let s:a_f_KAF = "\ufeda"
+let s:a_i_KAF = "\ufedb"
+let s:a_m_KAF = "\ufedc"
+let s:a_s_LAM = "\ufedd"
+let s:a_f_LAM = "\ufede"
+let s:a_i_LAM = "\ufedf"
+let s:a_m_LAM = "\ufee0"
+let s:a_s_MEEM = "\ufee1"
+let s:a_f_MEEM = "\ufee2"
+let s:a_i_MEEM = "\ufee3"
+let s:a_m_MEEM = "\ufee4"
+let s:a_s_NOON = "\ufee5"
+let s:a_f_NOON = "\ufee6"
+let s:a_i_NOON = "\ufee7"
+let s:a_m_NOON = "\ufee8"
+let s:a_s_HEH = "\ufee9"
+let s:a_f_HEH = "\ufeea"
+let s:a_i_HEH = "\ufeeb"
+let s:a_m_HEH = "\ufeec"
+let s:a_s_WAW = "\ufeed"
+let s:a_f_WAW = "\ufeee"
+let s:a_s_ALEF_MAKSURA = "\ufeef"
+let s:a_f_ALEF_MAKSURA = "\ufef0"
+let s:a_s_YEH = "\ufef1"
+let s:a_f_YEH = "\ufef2"
+let s:a_i_YEH = "\ufef3"
+let s:a_m_YEH = "\ufef4"
+let s:a_s_LAM_ALEF_MADDA_ABOVE = "\ufef5"
+let s:a_f_LAM_ALEF_MADDA_ABOVE = "\ufef6"
+let s:a_s_LAM_ALEF_HAMZA_ABOVE = "\ufef7"
+let s:a_f_LAM_ALEF_HAMZA_ABOVE = "\ufef8"
+let s:a_s_LAM_ALEF_HAMZA_BELOW = "\ufef9"
+let s:a_f_LAM_ALEF_HAMZA_BELOW = "\ufefa"
+let s:a_s_LAM_ALEF = "\ufefb"
+let s:a_f_LAM_ALEF = "\ufefc"
+
+let s:a_BYTE_ORDER_MARK = "\ufeff"
+
+func Test_shape_initial()
+ new
+ set arabicshape
+
+ " Shaping arabic {testchar} non-arabic Tests chg_c_a2i().
+ " pair[0] = testchar, pair[1] = next-result, pair[2] = current-result
+ for pair in [[s:a_YEH_HAMZA, s:a_f_GHAIN, s:a_i_YEH_HAMZA],
+ \ [s:a_HAMZA, s:a_s_GHAIN, s:a_s_HAMZA],
+ \ [s:a_ALEF_MADDA, s:a_s_GHAIN, s:a_s_ALEF_MADDA],
+ \ [s:a_ALEF_HAMZA_ABOVE, s:a_s_GHAIN, s:a_s_ALEF_HAMZA_ABOVE],
+ \ [s:a_WAW_HAMZA, s:a_s_GHAIN, s:a_s_WAW_HAMZA],
+ \ [s:a_ALEF_HAMZA_BELOW, s:a_s_GHAIN, s:a_s_ALEF_HAMZA_BELOW],
+ \ [s:a_ALEF, s:a_s_GHAIN, s:a_s_ALEF],
+ \ [s:a_TEH_MARBUTA, s:a_s_GHAIN, s:a_s_TEH_MARBUTA],
+ \ [s:a_DAL, s:a_s_GHAIN, s:a_s_DAL],
+ \ [s:a_THAL, s:a_s_GHAIN, s:a_s_THAL],
+ \ [s:a_REH, s:a_s_GHAIN, s:a_s_REH],
+ \ [s:a_ZAIN, s:a_s_GHAIN, s:a_s_ZAIN],
+ \ [s:a_TATWEEL, s:a_f_GHAIN, s:a_TATWEEL],
+ \ [s:a_WAW, s:a_s_GHAIN, s:a_s_WAW],
+ \ [s:a_ALEF_MAKSURA, s:a_s_GHAIN, s:a_s_ALEF_MAKSURA],
+ \ [s:a_BEH, s:a_f_GHAIN, s:a_i_BEH],
+ \ [s:a_TEH, s:a_f_GHAIN, s:a_i_TEH],
+ \ [s:a_THEH, s:a_f_GHAIN, s:a_i_THEH],
+ \ [s:a_JEEM, s:a_f_GHAIN, s:a_i_JEEM],
+ \ [s:a_HAH, s:a_f_GHAIN, s:a_i_HAH],
+ \ [s:a_KHAH, s:a_f_GHAIN, s:a_i_KHAH],
+ \ [s:a_SEEN, s:a_f_GHAIN, s:a_i_SEEN],
+ \ [s:a_SHEEN, s:a_f_GHAIN, s:a_i_SHEEN],
+ \ [s:a_SAD, s:a_f_GHAIN, s:a_i_SAD],
+ \ [s:a_DAD, s:a_f_GHAIN, s:a_i_DAD],
+ \ [s:a_TAH, s:a_f_GHAIN, s:a_i_TAH],
+ \ [s:a_ZAH, s:a_f_GHAIN, s:a_i_ZAH],
+ \ [s:a_AIN, s:a_f_GHAIN, s:a_i_AIN],
+ \ [s:a_GHAIN, s:a_f_GHAIN, s:a_i_GHAIN],
+ \ [s:a_FEH, s:a_f_GHAIN, s:a_i_FEH],
+ \ [s:a_QAF, s:a_f_GHAIN, s:a_i_QAF],
+ \ [s:a_KAF, s:a_f_GHAIN, s:a_i_KAF],
+ \ [s:a_LAM, s:a_f_GHAIN, s:a_i_LAM],
+ \ [s:a_MEEM, s:a_f_GHAIN, s:a_i_MEEM],
+ \ [s:a_NOON, s:a_f_GHAIN, s:a_i_NOON],
+ \ [s:a_HEH, s:a_f_GHAIN, s:a_i_HEH],
+ \ [s:a_YEH, s:a_f_GHAIN, s:a_i_YEH],
+ \ ]
+ call setline(1, s:a_GHAIN . pair[0] . ' ')
+ call assert_equal([pair[1] . pair[2] . ' '], ScreenLines(1, 3))
+ endfor
+
+ set arabicshape&
+ bwipe!
+endfunc
+
+func Test_shape_isolated()
+ new
+ set arabicshape
+
+ " Shaping non-arabic {testchar} non-arabic Tests chg_c_a2s().
+ " pair[0] = testchar, pair[1] = current-result
+ for pair in [[s:a_HAMZA, s:a_s_HAMZA],
+ \ [s:a_ALEF_MADDA, s:a_s_ALEF_MADDA],
+ \ [s:a_ALEF_HAMZA_ABOVE, s:a_s_ALEF_HAMZA_ABOVE],
+ \ [s:a_WAW_HAMZA, s:a_s_WAW_HAMZA],
+ \ [s:a_ALEF_HAMZA_BELOW, s:a_s_ALEF_HAMZA_BELOW],
+ \ [s:a_YEH_HAMZA, s:a_s_YEH_HAMZA],
+ \ [s:a_ALEF, s:a_s_ALEF],
+ \ [s:a_TEH_MARBUTA, s:a_s_TEH_MARBUTA],
+ \ [s:a_DAL, s:a_s_DAL],
+ \ [s:a_THAL, s:a_s_THAL],
+ \ [s:a_REH, s:a_s_REH],
+ \ [s:a_ZAIN, s:a_s_ZAIN],
+ \ [s:a_TATWEEL, s:a_TATWEEL],
+ \ [s:a_WAW, s:a_s_WAW],
+ \ [s:a_ALEF_MAKSURA, s:a_s_ALEF_MAKSURA],
+ \ [s:a_BEH, s:a_s_BEH],
+ \ [s:a_TEH, s:a_s_TEH],
+ \ [s:a_THEH, s:a_s_THEH],
+ \ [s:a_JEEM, s:a_s_JEEM],
+ \ [s:a_HAH, s:a_s_HAH],
+ \ [s:a_KHAH, s:a_s_KHAH],
+ \ [s:a_SEEN, s:a_s_SEEN],
+ \ [s:a_SHEEN, s:a_s_SHEEN],
+ \ [s:a_SAD, s:a_s_SAD],
+ \ [s:a_DAD, s:a_s_DAD],
+ \ [s:a_TAH, s:a_s_TAH],
+ \ [s:a_ZAH, s:a_s_ZAH],
+ \ [s:a_AIN, s:a_s_AIN],
+ \ [s:a_GHAIN, s:a_s_GHAIN],
+ \ [s:a_FEH, s:a_s_FEH],
+ \ [s:a_QAF, s:a_s_QAF],
+ \ [s:a_KAF, s:a_s_KAF],
+ \ [s:a_LAM, s:a_s_LAM],
+ \ [s:a_MEEM, s:a_s_MEEM],
+ \ [s:a_NOON, s:a_s_NOON],
+ \ [s:a_HEH, s:a_s_HEH],
+ \ [s:a_YEH, s:a_s_YEH],
+ \ ]
+ call setline(1, ' ' . pair[0] . ' ')
+ call assert_equal([' ' . pair[1] . ' '], ScreenLines(1, 3))
+ endfor
+
+ set arabicshape&
+ bwipe!
+endfunc
+
+func Test_shape_iso_to_medial()
+ new
+ set arabicshape
+
+ " Shaping arabic {testchar} arabic Tests chg_c_a2m().
+ " pair[0] = testchar, pair[1] = next-result, pair[2] = current-result,
+ " pair[3] = previous-result
+ for pair in [[s:a_HAMZA, s:a_s_GHAIN, s:a_s_HAMZA, s:a_s_BEH],
+ \[s:a_ALEF_MADDA, s:a_s_GHAIN, s:a_f_ALEF_MADDA, s:a_i_BEH],
+ \[s:a_ALEF_HAMZA_ABOVE, s:a_s_GHAIN, s:a_f_ALEF_HAMZA_ABOVE, s:a_i_BEH],
+ \[s:a_WAW_HAMZA, s:a_s_GHAIN, s:a_f_WAW_HAMZA, s:a_i_BEH],
+ \[s:a_ALEF_HAMZA_BELOW, s:a_s_GHAIN, s:a_f_ALEF_HAMZA_BELOW, s:a_i_BEH],
+ \[s:a_YEH_HAMZA, s:a_f_GHAIN, s:a_m_YEH_HAMZA, s:a_i_BEH],
+ \[s:a_ALEF, s:a_s_GHAIN, s:a_f_ALEF, s:a_i_BEH],
+ \[s:a_BEH, s:a_f_GHAIN, s:a_m_BEH, s:a_i_BEH],
+ \[s:a_TEH_MARBUTA, s:a_s_GHAIN, s:a_f_TEH_MARBUTA, s:a_i_BEH],
+ \[s:a_TEH, s:a_f_GHAIN, s:a_m_TEH, s:a_i_BEH],
+ \[s:a_THEH, s:a_f_GHAIN, s:a_m_THEH, s:a_i_BEH],
+ \[s:a_JEEM, s:a_f_GHAIN, s:a_m_JEEM, s:a_i_BEH],
+ \[s:a_HAH, s:a_f_GHAIN, s:a_m_HAH, s:a_i_BEH],
+ \[s:a_KHAH, s:a_f_GHAIN, s:a_m_KHAH, s:a_i_BEH],
+ \[s:a_DAL, s:a_s_GHAIN, s:a_f_DAL, s:a_i_BEH],
+ \[s:a_THAL, s:a_s_GHAIN, s:a_f_THAL, s:a_i_BEH],
+ \[s:a_REH, s:a_s_GHAIN, s:a_f_REH, s:a_i_BEH],
+ \[s:a_ZAIN, s:a_s_GHAIN, s:a_f_ZAIN, s:a_i_BEH],
+ \[s:a_SEEN, s:a_f_GHAIN, s:a_m_SEEN, s:a_i_BEH],
+ \[s:a_SHEEN, s:a_f_GHAIN, s:a_m_SHEEN, s:a_i_BEH],
+ \[s:a_SAD, s:a_f_GHAIN, s:a_m_SAD, s:a_i_BEH],
+ \[s:a_DAD, s:a_f_GHAIN, s:a_m_DAD, s:a_i_BEH],
+ \[s:a_TAH, s:a_f_GHAIN, s:a_m_TAH, s:a_i_BEH],
+ \[s:a_ZAH, s:a_f_GHAIN, s:a_m_ZAH, s:a_i_BEH],
+ \[s:a_AIN, s:a_f_GHAIN, s:a_m_AIN, s:a_i_BEH],
+ \[s:a_GHAIN, s:a_f_GHAIN, s:a_m_GHAIN, s:a_i_BEH],
+ \[s:a_TATWEEL, s:a_f_GHAIN, s:a_TATWEEL, s:a_i_BEH],
+ \[s:a_FEH, s:a_f_GHAIN, s:a_m_FEH, s:a_i_BEH],
+ \[s:a_QAF, s:a_f_GHAIN, s:a_m_QAF, s:a_i_BEH],
+ \[s:a_KAF, s:a_f_GHAIN, s:a_m_KAF, s:a_i_BEH],
+ \[s:a_LAM, s:a_f_GHAIN, s:a_m_LAM, s:a_i_BEH],
+ \[s:a_MEEM, s:a_f_GHAIN, s:a_m_MEEM, s:a_i_BEH],
+ \[s:a_NOON, s:a_f_GHAIN, s:a_m_NOON, s:a_i_BEH],
+ \[s:a_HEH, s:a_f_GHAIN, s:a_m_HEH, s:a_i_BEH],
+ \[s:a_WAW, s:a_s_GHAIN, s:a_f_WAW, s:a_i_BEH],
+ \[s:a_ALEF_MAKSURA, s:a_s_GHAIN, s:a_f_ALEF_MAKSURA, s:a_i_BEH],
+ \[s:a_YEH, s:a_f_GHAIN, s:a_m_YEH, s:a_i_BEH],
+ \ ]
+ call setline(1, s:a_GHAIN . pair[0] . s:a_BEH)
+ call assert_equal([pair[1] . pair[2] . pair[3]], ScreenLines(1, 3))
+ endfor
+
+ set arabicshape&
+ bwipe!
+endfunc
+
+func Test_shape_final()
+ new
+ set arabicshape
+
+ " Shaping arabic {testchar} arabic Tests chg_c_a2f().
+ " pair[0] = testchar, pair[1] = current-result, pair[2] = previous-result
+ for pair in [[s:a_HAMZA, s:a_s_HAMZA, s:a_s_BEH],
+ \[s:a_ALEF_MADDA, s:a_f_ALEF_MADDA, s:a_i_BEH],
+ \[s:a_ALEF_HAMZA_ABOVE, s:a_f_ALEF_HAMZA_ABOVE, s:a_i_BEH],
+ \[s:a_WAW_HAMZA, s:a_f_WAW_HAMZA, s:a_i_BEH],
+ \[s:a_ALEF_HAMZA_BELOW, s:a_f_ALEF_HAMZA_BELOW, s:a_i_BEH],
+ \[s:a_YEH_HAMZA, s:a_f_YEH_HAMZA, s:a_i_BEH],
+ \[s:a_ALEF, s:a_f_ALEF, s:a_i_BEH],
+ \[s:a_BEH, s:a_f_BEH, s:a_i_BEH],
+ \[s:a_TEH_MARBUTA, s:a_f_TEH_MARBUTA, s:a_i_BEH],
+ \[s:a_TEH, s:a_f_TEH, s:a_i_BEH],
+ \[s:a_THEH, s:a_f_THEH, s:a_i_BEH],
+ \[s:a_JEEM, s:a_f_JEEM, s:a_i_BEH],
+ \[s:a_HAH, s:a_f_HAH, s:a_i_BEH],
+ \[s:a_KHAH, s:a_f_KHAH, s:a_i_BEH],
+ \[s:a_DAL, s:a_f_DAL, s:a_i_BEH],
+ \[s:a_THAL, s:a_f_THAL, s:a_i_BEH],
+ \[s:a_REH, s:a_f_REH, s:a_i_BEH],
+ \[s:a_ZAIN, s:a_f_ZAIN, s:a_i_BEH],
+ \[s:a_SEEN, s:a_f_SEEN, s:a_i_BEH],
+ \[s:a_SHEEN, s:a_f_SHEEN, s:a_i_BEH],
+ \[s:a_SAD, s:a_f_SAD, s:a_i_BEH],
+ \[s:a_DAD, s:a_f_DAD, s:a_i_BEH],
+ \[s:a_TAH, s:a_f_TAH, s:a_i_BEH],
+ \[s:a_ZAH, s:a_f_ZAH, s:a_i_BEH],
+ \[s:a_AIN, s:a_f_AIN, s:a_i_BEH],
+ \[s:a_GHAIN, s:a_f_GHAIN, s:a_i_BEH],
+ \[s:a_TATWEEL, s:a_TATWEEL, s:a_i_BEH],
+ \[s:a_FEH, s:a_f_FEH, s:a_i_BEH],
+ \[s:a_QAF, s:a_f_QAF, s:a_i_BEH],
+ \[s:a_KAF, s:a_f_KAF, s:a_i_BEH],
+ \[s:a_LAM, s:a_f_LAM, s:a_i_BEH],
+ \[s:a_MEEM, s:a_f_MEEM, s:a_i_BEH],
+ \[s:a_NOON, s:a_f_NOON, s:a_i_BEH],
+ \[s:a_HEH, s:a_f_HEH, s:a_i_BEH],
+ \[s:a_WAW, s:a_f_WAW, s:a_i_BEH],
+ \[s:a_ALEF_MAKSURA, s:a_f_ALEF_MAKSURA, s:a_i_BEH],
+ \[s:a_YEH, s:a_f_YEH, s:a_i_BEH],
+ \ ]
+ call setline(1, ' ' . pair[0] . s:a_BEH)
+ call assert_equal([' ' . pair[1] . pair[2]], ScreenLines(1, 3))
+ endfor
+
+ set arabicshape&
+ bwipe!
+endfunc
+
+func Test_shape_combination_final()
+ new
+ set arabicshape
+
+ " Shaping arabic {testchar} arabic Tests chg_c_laa2f().
+ " pair[0] = testchar, pair[1] = current-result
+ for pair in [[s:a_ALEF_MADDA, s:a_f_LAM_ALEF_MADDA_ABOVE],
+ \ [s:a_ALEF_HAMZA_ABOVE, s:a_f_LAM_ALEF_HAMZA_ABOVE],
+ \ [s:a_ALEF_HAMZA_BELOW, s:a_f_LAM_ALEF_HAMZA_BELOW],
+ \ [s:a_ALEF, s:a_f_LAM_ALEF],
+ \ ]
+ " The test char is a composing char, put on s:a_LAM.
+ call setline(1, ' ' . s:a_LAM . pair[0] . s:a_BEH)
+ call assert_equal([' ' . pair[1] . s:a_i_BEH], ScreenLines(1, 3))
+ endfor
+
+ set arabicshape&
+ bwipe!
+endfunc
+
+func Test_shape_combination_isolated()
+ new
+ set arabicshape
+
+ " Shaping arabic {testchar} arabic Tests chg_c_laa2i().
+ " pair[0] = testchar, pair[1] = current-result
+ for pair in [[s:a_ALEF_MADDA, s:a_s_LAM_ALEF_MADDA_ABOVE],
+ \ [s:a_ALEF_HAMZA_ABOVE, s:a_s_LAM_ALEF_HAMZA_ABOVE],
+ \ [s:a_ALEF_HAMZA_BELOW, s:a_s_LAM_ALEF_HAMZA_BELOW],
+ \ [s:a_ALEF, s:a_s_LAM_ALEF],
+ \ ]
+ " The test char is a composing char, put on s:a_LAM.
+ call setline(1, ' ' . s:a_LAM . pair[0] . ' ')
+ call assert_equal([' ' . pair[1] . ' '], ScreenLines(1, 3))
+ endfor
+
+ set arabicshape&
+ bwipe!
+endfunc
+
+" Test for entering arabic character in a search command
+func Test_arabic_chars_in_search_cmd()
+ new
+ set arabic
+ call feedkeys("i\nsghl!\<C-^>vim\<C-^>", 'tx')
+ call cursor(1, 1)
+ call feedkeys("/^sghl!\<C-^>vim$\<C-^>\<CR>", 'tx')
+ call assert_equal([2, 1], [line('.'), col('.')])
+
+ " Try searching in left-to-right mode
+ set rightleftcmd=
+ call cursor(1, 1)
+ call feedkeys("/^sghl!\<C-^>vim$\<CR>", 'tx')
+ call assert_equal([2, 1], [line('.'), col('.')])
+
+ set rightleftcmd&
+ set rightleft&
+ set arabic&
+ bwipe!
+endfunc
+
+" vim: shiftwidth=2 sts=2 expandtab