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# -*- coding: utf-8 -*-
"""
Unit tests for the CSV reader.
Author: Gertjan van den Burg
"""
import unittest
import clevercsv
class ReaderTestCase(unittest.TestCase):
def _read_test(self, input, expect, **kwargs):
reader = clevercsv.reader(input, **kwargs)
result = list(reader)
self.assertEqual(result, expect)
def test_read_oddinputs(self):
self._read_test([], [])
self._read_test([""], [[]])
self.assertRaises(
clevercsv.Error, self._read_test, ['"ab"c'], None, strict=1
)
self.assertRaises(
clevercsv.Error, self._read_test, ["ab\0c"], None, strict=1
)
# This commented test doesn't make sense for us, because we assert that
# a field is only a quoted field if it begins *and* ends with a quote
# character (except for the last field of a file, which only needs to
# end in a quotechar if we're not strict).
# self._read_test(['"ab"c'], [["abc"]], doublequote=0)
self.assertRaises(clevercsv.Error, self._read_test, [b"ab\0c"], None)
def test_read_eol(self):
self._read_test(["a,b"], [["a", "b"]])
self._read_test(["a,b\n"], [["a", "b"]])
self._read_test(["a,b\r\n"], [["a", "b"]])
self._read_test(["a,b\r"], [["a", "b"]])
# these tests from CPython don't apply for now.
self.assertRaises(clevercsv.Error, self._read_test, ["a,b\rc,d"], [])
self.assertRaises(clevercsv.Error, self._read_test, ["a,b\rc,d"], [])
self.assertRaises(clevercsv.Error, self._read_test, ["a,b\rc,d"], [])
def test_read_eof(self):
self._read_test(['a,"'], [["a", ""]])
self._read_test(['"a'], [["a"]])
# we're not using escape characters in the same way.
# self._read_test("^", [["\n"]], escapechar="^")
def test_read_escape(self):
# we don't drop the escapechar if it serves no purpose
# so instead of this:
# self._read_test("a,\\b,c", [["a", "b", "c"]], escapechar="\\")
# we do this:
self._read_test(["a,\\b,c"], [["a", "\\b", "c"]], escapechar="\\")
self._read_test(["a,b\\,c"], [["a", "b,c"]], escapechar="\\")
self._read_test(['a,"b,c\\""'], [["a", 'b,c"']], escapechar="\\")
# the next test also differs from Python
self._read_test(['a,"b,c"\\'], [["a", "b,c"]], escapechar="\\")
def test_read_bigfield(self):
limit = clevercsv.field_size_limit()
try:
size = 500
bigstring = "X" * size
bigline = "%s,%s" % (bigstring, bigstring)
self._read_test([bigline], [[bigstring, bigstring]])
clevercsv.field_size_limit(size)
self._read_test([bigline], [[bigstring, bigstring]])
self.assertEqual(clevercsv.field_size_limit(), size)
clevercsv.field_size_limit(size=-1)
self.assertRaises(clevercsv.Error, self._read_test, [bigline], [])
self.assertRaises(TypeError, clevercsv.field_size_limit, None)
self.assertRaises(TypeError, clevercsv.field_size_limit, 1, None)
finally:
clevercsv.field_size_limit(limit)
def test_read_linenum(self):
r = clevercsv.reader(["line,1", "line,2", "line,3"])
self.assertEqual(r.line_num, 0)
self.assertEqual(next(r), ["line", "1"])
self.assertEqual(r.line_num, 1)
self.assertEqual(next(r), ["line", "2"])
self.assertEqual(r.line_num, 2)
self.assertEqual(next(r), ["line", "3"])
self.assertEqual(r.line_num, 3)
self.assertRaises(StopIteration, next, r)
self.assertEqual(r.line_num, 3)
def test_with_gen(self):
def gen(x):
for l in x:
yield l
r = clevercsv.reader(gen(["line,1", "line,2", "line,3"]))
self.assertEqual(next(r), ["line", "1"])
self.assertEqual(next(r), ["line", "2"])
self.assertEqual(next(r), ["line", "3"])
def test_simple(self):
self._read_test(
["A,B,C,D,E"],
[["A", "B", "C", "D", "E"]],
delimiter=",",
quotechar='"',
)
self._read_test(
["A,B,C,D,E"],
[["A", "B", "C", "D", "E"]],
delimiter=",",
quotechar="",
)
self._read_test(["A,B,C,D,E"], [["A,B,C,D,E"]], delimiter="")
self._read_test(
['A,"B",C,D,E'],
[["A", "B", "C", "D", "E"]],
delimiter=",",
quotechar='"',
)
self._read_test(
['A,"B,C",D,E'],
[["A", "B,C", "D", "E"]],
delimiter=",",
quotechar='"',
)
self._read_test(
['A,"B,C",D,E'],
[["A", '"B', 'C"', "D", "E"]],
delimiter=",",
quotechar="",
)
self._read_test(
['"A","B","C",,,,'],
[['"A"', '"B"', '"C"', "", "", "", ""]],
delimiter=",",
quotechar="",
)
def test_no_delim(self):
self._read_test(
['A"B"C', 'A"B""C""D"'],
[['A"B"C'], ['A"B""C""D"']],
delimiter="",
quotechar="",
)
self._read_test(
['A"B\r\nB"C', 'D"E"F', "G"],
[['A"B\r\nB"C'], ['D"E"F'], ["G"]],
delimiter="",
quotechar='"',
)
self._read_test(
['A"B\nB"C', 'D"E"F', "G"],
[['A"B\nB"C'], ['D"E"F'], ["G"]],
delimiter="",
quotechar='"',
)
self._read_test(
['A"B\nB\rB"C', 'D"E"F', "G"],
[['A"B\nB\rB"C'], ['D"E"F'], ["G"]],
delimiter="",
quotechar='"',
)
if __name__ == "__main__":
unittest.main()
|
