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import csv
import os
import platform
import sys
import unittest
from io import StringIO
from agate import csv_py3
from agate.exceptions import FieldSizeLimitError
class TestReader(unittest.TestCase):
def setUp(self):
self.rows = [
['number', 'text', 'boolean', 'date', 'datetime', 'timedelta'],
['1', 'a', 'True', '2015-11-04', '2015-11-04T12:22:00', '0:04:15'],
['2', '👍', 'False', '2015-11-05', '2015-11-04T12:45:00', '0:06:18'],
['', 'b', '', '', '', '']
]
def test_utf8(self):
with open('examples/test.csv', encoding='utf-8') as f:
rows = list(csv_py3.Reader(f))
for a, b in zip(self.rows, rows):
self.assertEqual(a, b)
def test_reader_alias(self):
with open('examples/test.csv', encoding='utf-8') as f:
rows = list(csv_py3.reader(f))
for a, b in zip(self.rows, rows):
self.assertEqual(a, b)
def test_properties(self):
with open('examples/test.csv', encoding='utf-8') as f:
reader = csv_py3.Reader(f)
self.assertEqual(reader.dialect.delimiter, ',')
self.assertEqual(reader.line_num, 0)
next(reader)
self.assertEqual(reader.line_num, 1)
def test_line_numbers(self):
with open('examples/test.csv', encoding='utf-8') as f:
rows = list(csv_py3.Reader(f, line_numbers=True))
sample_rows = [
['line_numbers', 'number', 'text', 'boolean', 'date', 'datetime', 'timedelta'],
['1', '1', 'a', 'True', '2015-11-04', '2015-11-04T12:22:00', '0:04:15'],
['2', '2', '👍', 'False', '2015-11-05', '2015-11-04T12:45:00', '0:06:18'],
['3', '', 'b', '', '', '', '']
]
for a, b in zip(sample_rows, rows):
self.assertEqual(a, b)
class TestFieldSizeLimit(unittest.TestCase):
def setUp(self):
self.lim = csv.field_size_limit()
with open('.test.csv', 'w', encoding='utf-8') as f:
f.write('a' * 10)
def tearDown(self):
# Resetting limit to avoid failure in other tests.
csv.field_size_limit(self.lim)
os.remove('.test.csv')
def test_field_size_limit(self):
# Testing field_size_limit for failure. Creating data using str * int.
with open('.test.csv', encoding='utf-8') as f:
c = csv_py3.Reader(f, field_size_limit=9)
try:
c.__next__()
except FieldSizeLimitError:
pass
else:
raise AssertionError('Expected FieldSizeLimitError')
# Now testing higher field_size_limit.
with open('.test.csv', encoding='utf-8') as f:
c = csv_py3.Reader(f, field_size_limit=11)
self.assertEqual(['a' * 10], c.__next__())
class TestWriter(unittest.TestCase):
def test_utf8(self):
output = StringIO()
writer = csv_py3.Writer(output)
writer.writerow(['a', 'b', 'c'])
writer.writerow(['1', '2', '3'])
writer.writerow(['4', '5', 'ʤ'])
written = StringIO(output.getvalue())
reader = csv_py3.Reader(written)
self.assertEqual(next(reader), ['a', 'b', 'c'])
self.assertEqual(next(reader), ['1', '2', '3'])
self.assertEqual(next(reader), ['4', '5', 'ʤ'])
def test_writer_alias(self):
output = StringIO()
writer = csv_py3.writer(output)
writer.writerow(['a', 'b', 'c'])
writer.writerow(['1', '2', '3'])
writer.writerow(['4', '5', 'ʤ'])
written = StringIO(output.getvalue())
reader = csv_py3.reader(written)
self.assertEqual(next(reader), ['a', 'b', 'c'])
self.assertEqual(next(reader), ['1', '2', '3'])
self.assertEqual(next(reader), ['4', '5', 'ʤ'])
def test_line_numbers(self):
output = StringIO()
writer = csv_py3.Writer(output, line_numbers=True)
writer.writerow(['a', 'b', 'c'])
writer.writerow(['1', '2', '3'])
writer.writerow(['4', '5', 'ʤ'])
written = StringIO(output.getvalue())
reader = csv_py3.Reader(written)
self.assertEqual(next(reader), ['line_number', 'a', 'b', 'c'])
self.assertEqual(next(reader), ['1', '1', '2', '3'])
self.assertEqual(next(reader), ['2', '4', '5', 'ʤ'])
def test_writerows(self):
output = StringIO()
writer = csv_py3.Writer(output)
writer.writerows([
['a', 'b', 'c'],
['1', '2', '3'],
['4', '5', 'ʤ']
])
written = StringIO(output.getvalue())
reader = csv_py3.Reader(written)
self.assertEqual(next(reader), ['a', 'b', 'c'])
self.assertEqual(next(reader), ['1', '2', '3'])
self.assertEqual(next(reader), ['4', '5', 'ʤ'])
class TestDictReader(unittest.TestCase):
def setUp(self):
self.rows = [
['number', 'text', 'boolean', 'date', 'datetime', 'timedelta'],
['1', 'a', 'True', '2015-11-04', '2015-11-04T12:22:00', '0:04:15'],
['2', '👍', 'False', '2015-11-05', '2015-11-04T12:45:00', '0:06:18'],
['', 'b', '', '', '', '']
]
self.f = open('examples/test.csv', encoding='utf-8')
def tearDown(self):
self.f.close()
def test_reader(self):
reader = csv_py3.DictReader(self.f)
self.assertEqual(next(reader), dict(zip(self.rows[0], self.rows[1])))
def test_reader_alias(self):
reader = csv_py3.DictReader(self.f)
self.assertEqual(next(reader), dict(zip(self.rows[0], self.rows[1])))
class TestDictWriter(unittest.TestCase):
def setUp(self):
self.output = StringIO()
def tearDown(self):
self.output.close()
def test_writer(self):
writer = csv_py3.DictWriter(self.output, ['a', 'b', 'c'])
writer.writeheader()
writer.writerow({
'a': '1',
'b': '2',
'c': '☃'
})
result = self.output.getvalue()
self.assertEqual(result, 'a,b,c\n1,2,☃\n')
def test_writer_alias(self):
writer = csv_py3.DictWriter(self.output, ['a', 'b', 'c'])
writer.writeheader()
writer.writerow({
'a': '1',
'b': '2',
'c': '☃'
})
result = self.output.getvalue()
self.assertEqual(result, 'a,b,c\n1,2,☃\n')
def test_line_numbers(self):
writer = csv_py3.DictWriter(self.output, ['a', 'b', 'c'], line_numbers=True)
writer.writeheader()
writer.writerow({
'a': '1',
'b': '2',
'c': '☃'
})
result = self.output.getvalue()
self.assertEqual(result, 'line_number,a,b,c\n1,1,2,☃\n')
def test_writerows(self):
writer = csv_py3.DictWriter(self.output, ['a', 'b', 'c'], line_numbers=True)
writer.writeheader()
writer.writerows([{
'a': '1',
'b': '2',
'c': '☃'
}])
result = self.output.getvalue()
self.assertEqual(result, 'line_number,a,b,c\n1,1,2,☃\n')
class TestSniffer(unittest.TestCase):
@unittest.skipIf(
platform.system() == 'Darwin' and sys.version_info[:2] == (3, 10),
reason='The (macos-latest, 3.10) job fails on GitHub Actions'
)
def test_sniffer(self):
with open('examples/test.csv', encoding='utf-8') as f:
contents = f.read()
direct = csv.Sniffer().sniff(contents, csv_py3.POSSIBLE_DELIMITERS).__dict__
actual = csv_py3.Sniffer().sniff(contents).__dict__
expected = csv.Sniffer().sniff(contents).__dict__
self.assertEqual(direct, expected, f'{direct!r} != {expected!r}')
self.assertEqual(actual, expected, f'{actual!r} != {expected!r}')
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