--[[
Copyright (c) 2022, Vsevolod Stakhov <vsevolod@rspamd.com>
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this
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this list of conditions and the following disclaimer in the documentation
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
]]--

context("Headers folding unit test", function()
  local util = require("rspamd_util")
    -- {header, value}, "expected result"
  local cases = {
    {{"test", "test"}, "test"},
    {{"test1", "_abc _def _ghi _fdjhfd _fhdjkfh _dkhkjd _fdjkf _dshfdks _fhdjfdkhfk _dshfds _fdsjk _fdkhfdks _fdsjf _dkf"},
     "_abc _def _ghi _fdjhfd _fhdjkfh _dkhkjd _fdjkf _dshfdks\r\n\t_fhdjfdkhfk _dshfds _fdsjk _fdkhfdks _fdsjf _dkf"
    },
    {{"Test1", "_abc _def _ghi _fdjhfd _fhdjkfh _dkhaaaaaaaaaaakjdfdjkfdshfdksfhdjfdkhfkdshfdsfdsjkfdkhfdksfdsjf _dkf"},
     "_abc _def _ghi _fdjhfd _fhdjkfh\r\n\t_dkhaaaaaaaaaaakjdfdjkfdshfdksfhdjfdkhfkdshfdsfdsjkfdkhfdksfdsjf\r\n\t_dkf"
    },
    {{"Content-Type", "multipart/mixed; boundary=\"---- =_NextPart_000_01BDBF1F.DA8F77EE\"hhhhhhhhhhhhhhhhhhhhhhhhh fjsdhfkjsd fhdjsfhkj"},
     "multipart/mixed; boundary=\"---- =_NextPart_000_01BDBF1F.DA8F77EE\"hhhhhhhhhhhhhhhhhhhhhhhhh\r\n\tfjsdhfkjsd fhdjsfhkj"
    },
    {{"Content-Type", "multipart/mixed; boundary=\"---- =_NextPart_000_01BDBF1F.DA8F77EE\"hkjhgkfhgfhgf\"hfkjdhf fhjf fghjghf fdshjfhdsj\" hgjhgfjk"},
     "multipart/mixed; boundary=\"---- =_NextPart_000_01BDBF1F.DA8F77EE\"hkjhgkfhgfhgf\"hfkjdhf fhjf fghjghf fdshjfhdsj\" hgjhgfjk"
    },
    {{"Content-Type", "Content-Type: multipart/mixed; boundary=\"---- =_NextPart_000_01BDBF1F.DA8F77EE\" abc def ghfdgfdsgj fdshfgfsdgfdsg hfsdgjfsdg fgsfgjsg"},
     "Content-Type: multipart/mixed; boundary=\"---- =_NextPart_000_01BDBF1F.DA8F77EE\" abc\r\n\tdef ghfdgfdsgj fdshfgfsdgfdsg hfsdgjfsdg fgsfgjsg"
    },
    {{"X-Spam-Symbols", "Returnpath_BL2,HFILTER_FROM_BOUNCE,R_PARTS_DIFFER,R_IP_PBL,R_ONE_RCPT,R_googleredir,R_TO_SEEMS_AUTO,R_SPF_NEUTRAL,R_PRIORITY_3,RBL_SPAMHAUS_PBL,HFILTER_MID_NOT_FQDN,MISSING_CTE,R_HAS_URL,RBL_SPAMHAUS_CSS,RBL_SPAMHAUS_XBL,BAYES_SPAM,RECEIVED_RBL10", ','},
     "Returnpath_BL2,\r\n\tHFILTER_FROM_BOUNCE,\r\n\tR_PARTS_DIFFER,\r\n\tR_IP_PBL,\r\n\tR_ONE_RCPT,\r\n\tR_googleredir,\r\n\tR_TO_SEEMS_AUTO,\r\n\tR_SPF_NEUTRAL,\r\n\tR_PRIORITY_3,\r\n\tRBL_SPAMHAUS_PBL,\r\n\tHFILTER_MID_NOT_FQDN,\r\n\tMISSING_CTE,\r\n\tR_HAS_URL,\r\n\tRBL_SPAMHAUS_CSS,\r\n\tRBL_SPAMHAUS_XBL,\r\n\tBAYES_SPAM,\r\n\tRECEIVED_RBL10"
    },
  }
  local function escape_spaces(str)
    str = string.gsub(str, '[\r\n]+', '<NL>')
    str = string.gsub(str, '[ ]', '<SP>')
    str = string.gsub(str, '[\t]', '<TB>')

    return str
  end
  for i,c in ipairs(cases) do
    test("Headers folding: " .. i, function()
      local fv = util.fold_header(c[1][1], c[1][2], 'crlf', c[1][3])
      assert_not_nil(fv)
      assert_equal(fv, c[2], string.format("'%s' doesn't match with '%s'",
              escape_spaces(c[2]), escape_spaces(fv)))
    end)
  end
end)
