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TST: Parser tests refactoring #13319

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9 changes: 0 additions & 9 deletions pandas/io/tests/parser/c_parser_only.py
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Original file line number Diff line number Diff line change
Expand Up @@ -419,15 +419,6 @@ def test_tokenize_CR_with_quoting(self):
expected = self.read_csv(StringIO(data.replace('\r', '\n')))
tm.assert_frame_equal(result, expected)

def test_raise_on_no_columns(self):
# single newline
data = "\n"
self.assertRaises(ValueError, self.read_csv, StringIO(data))

# test with more than a single newline
data = "\n\n\n"
self.assertRaises(ValueError, self.read_csv, StringIO(data))

def test_grow_boundary_at_cap(self):
# See gh-12494
#
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9 changes: 9 additions & 0 deletions pandas/io/tests/parser/common.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1323,3 +1323,12 @@ def test_inf_parsing(self):
# TODO: remove condition when 'na_filter' is supported for Python
df = self.read_csv(StringIO(data), index_col=0, na_filter=False)
tm.assert_almost_equal(df['A'].values, expected.values)

def test_raise_on_no_columns(self):
# single newline
data = "\n"
self.assertRaises(EmptyDataError, self.read_csv, StringIO(data))

# test with more than a single newline
data = "\n\n\n"
self.assertRaises(EmptyDataError, self.read_csv, StringIO(data))
114 changes: 0 additions & 114 deletions pandas/io/tests/parser/na_values.py
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Original file line number Diff line number Diff line change
Expand Up @@ -250,117 +250,3 @@ def test_na_values_keep_default(self):
'Three': ['None', 'two', 'None', 'nan', 'five', '',
'seven']})
tm.assert_frame_equal(xp.reindex(columns=df.columns), df)

def test_skiprow_with_newline(self):
# see gh-12775 and gh-10911
data = """id,text,num_lines
1,"line 11
line 12",2
2,"line 21
line 22",2
3,"line 31",1"""
expected = [[2, 'line 21\nline 22', 2],
[3, 'line 31', 1]]
expected = DataFrame(expected, columns=[
'id', 'text', 'num_lines'])
df = self.read_csv(StringIO(data), skiprows=[1])
tm.assert_frame_equal(df, expected)

data = ('a,b,c\n~a\n b~,~e\n d~,'
'~f\n f~\n1,2,~12\n 13\n 14~')
expected = [['a\n b', 'e\n d', 'f\n f']]
expected = DataFrame(expected, columns=[
'a', 'b', 'c'])
df = self.read_csv(StringIO(data),
quotechar="~",
skiprows=[2])
tm.assert_frame_equal(df, expected)

data = ('Text,url\n~example\n '
'sentence\n one~,url1\n~'
'example\n sentence\n two~,url2\n~'
'example\n sentence\n three~,url3')
expected = [['example\n sentence\n two', 'url2']]
expected = DataFrame(expected, columns=[
'Text', 'url'])
df = self.read_csv(StringIO(data),
quotechar="~",
skiprows=[1, 3])
tm.assert_frame_equal(df, expected)

def test_skiprow_with_quote(self):
# see gh-12775 and gh-10911
data = """id,text,num_lines
1,"line '11' line 12",2
2,"line '21' line 22",2
3,"line '31' line 32",1"""
expected = [[2, "line '21' line 22", 2],
[3, "line '31' line 32", 1]]
expected = DataFrame(expected, columns=[
'id', 'text', 'num_lines'])
df = self.read_csv(StringIO(data), skiprows=[1])
tm.assert_frame_equal(df, expected)

def test_skiprow_with_newline_and_quote(self):
# see gh-12775 and gh-10911
data = """id,text,num_lines
1,"line \n'11' line 12",2
2,"line \n'21' line 22",2
3,"line \n'31' line 32",1"""
expected = [[2, "line \n'21' line 22", 2],
[3, "line \n'31' line 32", 1]]
expected = DataFrame(expected, columns=[
'id', 'text', 'num_lines'])
df = self.read_csv(StringIO(data), skiprows=[1])
tm.assert_frame_equal(df, expected)

data = """id,text,num_lines
1,"line '11\n' line 12",2
2,"line '21\n' line 22",2
3,"line '31\n' line 32",1"""
expected = [[2, "line '21\n' line 22", 2],
[3, "line '31\n' line 32", 1]]
expected = DataFrame(expected, columns=[
'id', 'text', 'num_lines'])
df = self.read_csv(StringIO(data), skiprows=[1])
tm.assert_frame_equal(df, expected)

data = """id,text,num_lines
1,"line '11\n' \r\tline 12",2
2,"line '21\n' \r\tline 22",2
3,"line '31\n' \r\tline 32",1"""
expected = [[2, "line '21\n' \r\tline 22", 2],
[3, "line '31\n' \r\tline 32", 1]]
expected = DataFrame(expected, columns=[
'id', 'text', 'num_lines'])
df = self.read_csv(StringIO(data), skiprows=[1])
tm.assert_frame_equal(df, expected)

def test_skiprows_lineterminator(self):
# see gh-9079
data = '\n'.join(['SMOSMANIA ThetaProbe-ML2X ',
'2007/01/01 01:00 0.2140 U M ',
'2007/01/01 02:00 0.2141 M O ',
'2007/01/01 04:00 0.2142 D M '])
expected = DataFrame([['2007/01/01', '01:00', 0.2140, 'U', 'M'],
['2007/01/01', '02:00', 0.2141, 'M', 'O'],
['2007/01/01', '04:00', 0.2142, 'D', 'M']],
columns=['date', 'time', 'var', 'flag',
'oflag'])

# test with default line terminators "LF" and "CRLF"
df = self.read_csv(StringIO(data), skiprows=1, delim_whitespace=True,
names=['date', 'time', 'var', 'flag', 'oflag'])
tm.assert_frame_equal(df, expected)

df = self.read_csv(StringIO(data.replace('\n', '\r\n')),
skiprows=1, delim_whitespace=True,
names=['date', 'time', 'var', 'flag', 'oflag'])
tm.assert_frame_equal(df, expected)

# "CR" is not respected with the Python parser yet
if self.engine == 'c':
df = self.read_csv(StringIO(data.replace('\n', '\r')),
skiprows=1, delim_whitespace=True,
names=['date', 'time', 'var', 'flag', 'oflag'])
tm.assert_frame_equal(df, expected)
114 changes: 114 additions & 0 deletions pandas/io/tests/parser/skiprows.py
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Original file line number Diff line number Diff line change
Expand Up @@ -76,3 +76,117 @@ def test_skiprows_blank(self):
datetime(2000, 1, 3)])
expected.index.name = 0
tm.assert_frame_equal(data, expected)

def test_skiprow_with_newline(self):
# see gh-12775 and gh-10911
data = """id,text,num_lines
1,"line 11
line 12",2
2,"line 21
line 22",2
3,"line 31",1"""
expected = [[2, 'line 21\nline 22', 2],
[3, 'line 31', 1]]
expected = DataFrame(expected, columns=[
'id', 'text', 'num_lines'])
df = self.read_csv(StringIO(data), skiprows=[1])
tm.assert_frame_equal(df, expected)

data = ('a,b,c\n~a\n b~,~e\n d~,'
'~f\n f~\n1,2,~12\n 13\n 14~')
expected = [['a\n b', 'e\n d', 'f\n f']]
expected = DataFrame(expected, columns=[
'a', 'b', 'c'])
df = self.read_csv(StringIO(data),
quotechar="~",
skiprows=[2])
tm.assert_frame_equal(df, expected)

data = ('Text,url\n~example\n '
'sentence\n one~,url1\n~'
'example\n sentence\n two~,url2\n~'
'example\n sentence\n three~,url3')
expected = [['example\n sentence\n two', 'url2']]
expected = DataFrame(expected, columns=[
'Text', 'url'])
df = self.read_csv(StringIO(data),
quotechar="~",
skiprows=[1, 3])
tm.assert_frame_equal(df, expected)

def test_skiprow_with_quote(self):
# see gh-12775 and gh-10911
data = """id,text,num_lines
1,"line '11' line 12",2
2,"line '21' line 22",2
3,"line '31' line 32",1"""
expected = [[2, "line '21' line 22", 2],
[3, "line '31' line 32", 1]]
expected = DataFrame(expected, columns=[
'id', 'text', 'num_lines'])
df = self.read_csv(StringIO(data), skiprows=[1])
tm.assert_frame_equal(df, expected)

def test_skiprow_with_newline_and_quote(self):
# see gh-12775 and gh-10911
data = """id,text,num_lines
1,"line \n'11' line 12",2
2,"line \n'21' line 22",2
3,"line \n'31' line 32",1"""
expected = [[2, "line \n'21' line 22", 2],
[3, "line \n'31' line 32", 1]]
expected = DataFrame(expected, columns=[
'id', 'text', 'num_lines'])
df = self.read_csv(StringIO(data), skiprows=[1])
tm.assert_frame_equal(df, expected)

data = """id,text,num_lines
1,"line '11\n' line 12",2
2,"line '21\n' line 22",2
3,"line '31\n' line 32",1"""
expected = [[2, "line '21\n' line 22", 2],
[3, "line '31\n' line 32", 1]]
expected = DataFrame(expected, columns=[
'id', 'text', 'num_lines'])
df = self.read_csv(StringIO(data), skiprows=[1])
tm.assert_frame_equal(df, expected)

data = """id,text,num_lines
1,"line '11\n' \r\tline 12",2
2,"line '21\n' \r\tline 22",2
3,"line '31\n' \r\tline 32",1"""
expected = [[2, "line '21\n' \r\tline 22", 2],
[3, "line '31\n' \r\tline 32", 1]]
expected = DataFrame(expected, columns=[
'id', 'text', 'num_lines'])
df = self.read_csv(StringIO(data), skiprows=[1])
tm.assert_frame_equal(df, expected)

def test_skiprows_lineterminator(self):
# see gh-9079
data = '\n'.join(['SMOSMANIA ThetaProbe-ML2X ',
'2007/01/01 01:00 0.2140 U M ',
'2007/01/01 02:00 0.2141 M O ',
'2007/01/01 04:00 0.2142 D M '])
expected = DataFrame([['2007/01/01', '01:00', 0.2140, 'U', 'M'],
['2007/01/01', '02:00', 0.2141, 'M', 'O'],
['2007/01/01', '04:00', 0.2142, 'D', 'M']],
columns=['date', 'time', 'var', 'flag',
'oflag'])

# test with default line terminators "LF" and "CRLF"
df = self.read_csv(StringIO(data), skiprows=1, delim_whitespace=True,
names=['date', 'time', 'var', 'flag', 'oflag'])
tm.assert_frame_equal(df, expected)

df = self.read_csv(StringIO(data.replace('\n', '\r\n')),
skiprows=1, delim_whitespace=True,
names=['date', 'time', 'var', 'flag', 'oflag'])
tm.assert_frame_equal(df, expected)

# "CR" is not respected with the Python parser yet
if self.engine == 'c':
df = self.read_csv(StringIO(data.replace('\n', '\r')),
skiprows=1, delim_whitespace=True,
names=['date', 'time', 'var', 'flag', 'oflag'])
tm.assert_frame_equal(df, expected)