lib/csv/test_csv.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org ).
   2 #
   3 # This file is free software, which comes along with NIT. This software is
   4 # distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
   5 # without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
   6 # PARTICULAR PURPOSE. You can modify it is you want, provided this header
   7 # is kept unaltered, and a notification of the changes is added.
   8 # You are allowed to redistribute it and sell it, alone or is a part of
   9 # another product.
  10
  11 # Tests for `csv`.
  12 module test_csv is test_suite
  13
  14 import test_suite
  15 import csv
  16
  17 class TestCsvWriter
  18         super TestSuite
  19
  20         # The custom CSV format used in the tests.
  21         private var custom_format = new CsvFormat('/', ':', "#")
  22
  23         # Expect to write `row` as `expected_rfc4180` and as `expected_custom`.
  24         #
  25         # Parameters:
  26         #
  27         # * `always_escape`: value of the `always_escape` option.
  28         # * `row`: row to write.
  29         # * `expected_rfc4180`: expected result in RFC 4180.
  30         # * `expected_custom`: expected result in the custom CSV format.
  31         private fun expect(always_escape: Bool, row: SequenceRead[String],
  32                         expected_rfc4180: String,
  33                         expected_custom: String) do
  34                 var out = new StringOStream
  35                 var writer = new CsvWriter(out)
  36
  37                 writer.always_escape = always_escape
  38                 writer.write_sequence(row)
  39                 assert out.to_s == expected_rfc4180 else
  40                         sys.stderr.write "\nFormat: RFC 4180\n"
  41                         sys.stderr.write "Expecting: \"{expected_rfc4180.escape_to_nit}\"\n"
  42                         sys.stderr.write "Got: \"{out.to_s.escape_to_nit}\"\n"
  43                 end
  44                 writer.close
  45
  46                 out = new StringOStream
  47                 writer = new CsvWriter.with_format(out, custom_format)
  48                 writer.always_escape = always_escape
  49                 writer.write_sequence(row)
  50                 assert out.to_s == expected_custom else
  51                         sys.stderr.write "\nFormat: {custom_format.delimiter}"
  52                         sys.stderr.write " {custom_format.separator}"
  53                         sys.stderr.write " {custom_format.eol.escape_to_nit}\n"
  54                         sys.stderr.write "Expecting: \"{expected_custom.escape_to_nit}\"\n"
  55                         sys.stderr.write "Got: \"{out.to_s.escape_to_nit}\"\n"
  56                 end
  57                 writer.close
  58         end
  59
  60         fun test_empty do expect(true, new Array[String], "\r\n", "#")
  61
  62         fun test_one_cell do expect(true, ["foo/\"\r\n,"],
  63                         "\"foo/\"\"\r\n,\"\r\n",
  64                         "/foo//\"\r\n,/#")
  65
  66         fun test_optimize_size_escaped do expect(false, ["foo/\"\r\n,"],
  67                         "\"foo/\"\"\r\n,\"\r\n",
  68                         "/foo//\"\r\n,/#")
  69
  70         fun test_optimize_size_eol do expect(false, ["foo\r#\n"],
  71                         "\"foo\r#\n\"\r\n",
  72                         "/foo\r#\n/#")
  73
  74         fun test_optimize_size_unescaped do expect(false, ["foo"],
  75                         "foo\r\n",
  76                         "foo#")
  77
  78         fun test_multiple_cells do expect(true, ["1", "", "/"],
  79                         "\"1\",,\"/\"\r\n",
  80                         "/1/::////#")
  81
  82         fun test_multiple_cells_optimize_size do expect(false, ["1", "", "/"],
  83                         "1,,/\r\n",
  84                         "1::////#")
  85 end