summaryrefslogtreecommitdiff
path: root/test/csv/tc_csv_parsing.rb
blob: 9eb2e398d4746e1f3c2efa42fa402b4e800deeb5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
#!/usr/local/bin/ruby -w

# tc_csv_parsing.rb
#
#  Created by James Edward Gray II on 2005-10-31.
#  Copyright 2005 James Edward Gray II. You can redistribute or modify this code
#  under the terms of Ruby's license.

require "test/unit"

require "csv"

# 
# Following tests are my interpretation of the 
# {CSV RCF}[http://www.ietf.org/rfc/rfc4180.txt].  I only deviate from that 
# document in one place (intentionally) and that is to make the default row
# separator <tt>$/</tt>.
# 
class TestCSVParsing < Test::Unit::TestCase
  def test_mastering_regex_example
    ex = %Q{Ten Thousand,10000, 2710 ,,"10,000","It's ""10 Grand"", baby",10K}
    assert_equal( [ "Ten Thousand", "10000", " 2710 ", nil, "10,000",
                    "It's \"10 Grand\", baby", "10K" ],
                  CSV.parse_line(ex) )
  end
  
  # Old Ruby 1.8 CSV library tests.
  def test_std_lib_csv
    [ ["\t", ["\t"]],
      ["foo,\"\"\"\"\"\",baz", ["foo", "\"\"", "baz"]],
      ["foo,\"\"\"bar\"\"\",baz", ["foo", "\"bar\"", "baz"]],
      ["\"\"\"\n\",\"\"\"\n\"", ["\"\n", "\"\n"]],
      ["foo,\"\r\n\",baz", ["foo", "\r\n", "baz"]],
      ["\"\"", [""]],
      ["foo,\"\"\"\",baz", ["foo", "\"", "baz"]],
      ["foo,\"\r.\n\",baz", ["foo", "\r.\n", "baz"]],
      ["foo,\"\r\",baz", ["foo", "\r", "baz"]],
      ["foo,\"\",baz", ["foo", "", "baz"]],
      ["\",\"", [","]],
      ["foo", ["foo"]],
      [",,", [nil, nil, nil]],
      [",", [nil, nil]],
      ["foo,\"\n\",baz", ["foo", "\n", "baz"]],
      ["foo,,baz", ["foo", nil, "baz"]],
      ["\"\"\"\r\",\"\"\"\r\"", ["\"\r", "\"\r"]],
      ["\",\",\",\"", [",", ","]],
      ["foo,bar,", ["foo", "bar", nil]],
      [",foo,bar", [nil, "foo", "bar"]],
      ["foo,bar", ["foo", "bar"]],
      [";", [";"]],
      ["\t,\t", ["\t", "\t"]],
      ["foo,\"\r\n\r\",baz", ["foo", "\r\n\r", "baz"]],
      ["foo,\"\r\n\n\",baz", ["foo", "\r\n\n", "baz"]],
      ["foo,\"foo,bar\",baz", ["foo", "foo,bar", "baz"]],
      [";,;", [";", ";"]] ].each do |csv_test|
      assert_equal(csv_test.last, CSV.parse_line(csv_test.first))
    end

    [ ["foo,\"\"\"\"\"\",baz", ["foo", "\"\"", "baz"]],
      ["foo,\"\"\"bar\"\"\",baz", ["foo", "\"bar\"", "baz"]],
      ["foo,\"\r\n\",baz", ["foo", "\r\n", "baz"]],
      ["\"\"", [""]],
      ["foo,\"\"\"\",baz", ["foo", "\"", "baz"]],
      ["foo,\"\r.\n\",baz", ["foo", "\r.\n", "baz"]],
      ["foo,\"\r\",baz", ["foo", "\r", "baz"]],
      ["foo,\"\",baz", ["foo", "", "baz"]],
      ["foo", ["foo"]],
      [",,", [nil, nil, nil]],
      [",", [nil, nil]],
      ["foo,\"\n\",baz", ["foo", "\n", "baz"]],
      ["foo,,baz", ["foo", nil, "baz"]],
      ["foo,bar", ["foo", "bar"]],
      ["foo,\"\r\n\n\",baz", ["foo", "\r\n\n", "baz"]],
      ["foo,\"foo,bar\",baz", ["foo", "foo,bar", "baz"]] ].each do |csv_test|
      assert_equal(csv_test.last, CSV.parse_line(csv_test.first))
    end
  end
  
  # From:  http://ruby-talk.org/cgi-bin/scat.rb/ruby/ruby-core/6496
  def test_aras_edge_cases
    [ [%Q{a,b},               ["a", "b"]],
      [%Q{a,"""b"""},         ["a", "\"b\""]],
      [%Q{a,"""b"},           ["a", "\"b"]],
      [%Q{a,"b"""},           ["a", "b\""]],
      [%Q{a,"\nb"""},         ["a", "\nb\""]],
      [%Q{a,"""\nb"},         ["a", "\"\nb"]],
      [%Q{a,"""\nb\n"""},     ["a", "\"\nb\n\""]],
      [%Q{a,"""\nb\n""",\nc}, ["a", "\"\nb\n\"", nil]],
      [%Q{a,,,},              ["a", nil, nil, nil]],
      [%Q{,},                 [nil, nil]],
      [%Q{"",""},             ["", ""]],
      [%Q{""""},              ["\""]],
      [%Q{"""",""},           ["\"",""]],
      [%Q{,""},               [nil,""]],
      [%Q{,"\r"},             [nil,"\r"]],
      [%Q{"\r\n,"},           ["\r\n,"]],
      [%Q{"\r\n,",},          ["\r\n,", nil]] ].each do |edge_case|
        assert_equal(edge_case.last, CSV.parse_line(edge_case.first))
      end
  end
  
  def test_james_edge_cases
    # A read at eof? should return nil.
    assert_equal(nil, CSV.parse_line(""))
    # 
    # With Ruby 1.8 CSV it's impossible to tell an empty line from a line
    # containing a single +nil+ field.  The old CSV library returns
    # <tt>[nil]</tt> in these cases, but <tt>Array.new</tt> makes more sense to
    # me.
    # 
    assert_equal(Array.new, CSV.parse_line("\n1,2,3\n"))
  end
  
  def test_malformed_csv
    assert_raise(CSV::MalformedCSVError) do
      CSV.parse_line("1,2\r,3", :row_sep => "\n")
    end
    
    bad_data = <<-END_DATA.gsub(/^ +/, "")
    line,1,abc
    line,2,"def\nghi"
    
    line,4,some\rjunk
    line,5,jkl
    END_DATA
    lines = bad_data.to_a
    assert_equal(6, lines.size)
    assert_match(/\Aline,4/, lines.find { |l| l =~ /some\rjunk/ })
    
    csv = CSV.new(bad_data)
    begin
      loop do
        assert_not_nil(csv.shift)
        assert_send([csv.lineno, :<, 4])
      end
    rescue CSV::MalformedCSVError
      assert_equal( "Unquoted fields do not allow \\r or \\n (line 4).",
                    $!.message )
    end

    assert_raise(CSV::MalformedCSVError) { CSV.parse_line('1,2,"3...') }
    
    bad_data = <<-END_DATA.gsub(/^ +/, "")
    line,1,abc
    line,2,"def\nghi"
    
    line,4,8'10"
    line,5,jkl
    END_DATA
    lines = bad_data.to_a
    assert_equal(6, lines.size)
    assert_match(/\Aline,4/, lines.find { |l| l =~ /8'10"/ })
    
    csv = CSV.new(bad_data)
    begin
      loop do
        assert_not_nil(csv.shift)
        assert_send([csv.lineno, :<, 4])
      end
    rescue CSV::MalformedCSVError
      assert_equal("Unclosed quoted field on line 4.", $!.message)
    end
  end
end