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from __future__ import absolute_import, print_function, division
import pytest
from petl.test.helpers import ieq
from petl.errors import FieldSelectionError
from petl.util import fieldnames
from petl.transform.headers import setheader, extendheader, pushheader, skip, \
rename, prefixheader, suffixheader, sortheader
def test_setheader():
table1 = (('foo', 'bar'),
('a', 1),
('b', 2))
table2 = setheader(table1, ['foofoo', 'barbar'])
expect2 = (('foofoo', 'barbar'),
('a', 1),
('b', 2))
ieq(expect2, table2)
ieq(expect2, table2) # can iterate twice?
def test_setheader_empty():
table1 = (('foo', 'bar'),)
table2 = setheader(table1, ['foofoo', 'barbar'])
expect2 = (('foofoo', 'barbar'),)
ieq(expect2, table2)
def test_setheader_headerless():
table = []
actual = setheader(table, ['foo', 'bar'])
expect = [('foo', 'bar')]
ieq(expect, actual)
def test_extendheader():
table1 = (('foo',),
('a', 1, True),
('b', 2, False))
table2 = extendheader(table1, ['bar', 'baz'])
expect2 = (('foo', 'bar', 'baz'),
('a', 1, True),
('b', 2, False))
ieq(expect2, table2)
ieq(expect2, table2) # can iterate twice?
def test_extendheader_empty():
table1 = (('foo',),)
table2 = extendheader(table1, ['bar', 'baz'])
expect2 = (('foo', 'bar', 'baz'),)
ieq(expect2, table2)
def test_extendheader_headerless():
table = []
actual = extendheader(table, ['foo', 'bar'])
expect = [('foo', 'bar')]
ieq(expect, actual)
ieq(expect, actual)
def test_pushheader():
table1 = (('a', 1),
('b', 2))
table2 = pushheader(table1, ['foo', 'bar'])
expect2 = (('foo', 'bar'),
('a', 1),
('b', 2))
ieq(expect2, table2)
ieq(expect2, table2) # can iterate twice?
def test_pushheader_empty():
table1 = (('a', 1),)
table2 = pushheader(table1, ['foo', 'bar'])
expect2 = (('foo', 'bar'),
('a', 1))
ieq(expect2, table2)
table1 = tuple()
table2 = pushheader(table1, ['foo', 'bar'])
expect2 = (('foo', 'bar'),)
ieq(expect2, table2)
table1 = tuple()
table2 = pushheader(table1, 'foo', 'bar')
expect2 = (('foo', 'bar'),)
ieq(expect2, table2)
def test_pushheader_headerless():
table = []
actual = pushheader(table, ['foo', 'bar'])
expect = [('foo', 'bar')]
ieq(expect, actual)
ieq(expect, actual)
def test_pushheader_positional():
table1 = (('a', 1),
('b', 2))
# positional arguments instead of list
table2 = pushheader(table1, 'foo', 'bar')
expect2 = (('foo', 'bar'),
('a', 1),
('b', 2))
ieq(expect2, table2)
ieq(expect2, table2) # can iterate twice?
# test with many fields
table1 = (('a', 1, 11, 111, 1111),
('b', 2, 22, 222, 2222))
# positional arguments instead of list
table2 = pushheader(table1, 'foo', 'bar', 'foo1', 'foo2', 'foo3')
expect2 = (('foo', 'bar', 'foo1', 'foo2', 'foo3'),
('a', 1, 11, 111, 1111),
('b', 2, 22, 222, 2222))
ieq(expect2, table2)
ieq(expect2, table2) # can iterate twice?
# test with too few fields in header
table1 = (('a', 1, 11, 111, 1111),
('b', 2, 22, 222, 2222))
# positional arguments instead of list
table2 = pushheader(table1, 'foo', 'bar', 'foo1', 'foo2')
expect2 = (('foo', 'bar', 'foo1', 'foo2'),
('a', 1, 11, 111, 1111),
('b', 2, 22, 222, 2222))
ieq(expect2, table2)
ieq(expect2, table2) # can iterate twice?
# test with too many fields in header
table1 = (('a', 1, 11, 111, 1111),
('b', 2, 22, 222, 2222))
# positional arguments instead of list
table2 = pushheader(table1, 'foo', 'bar', 'foo1', 'foo2', 'foo3', 'foo4')
expect2 = (('foo', 'bar', 'foo1', 'foo2', 'foo3', 'foo4'),
('a', 1, 11, 111, 1111),
('b', 2, 22, 222, 2222))
ieq(expect2, table2)
ieq(expect2, table2) # can iterate twice?
def test_skip():
table1 = (('#aaa', 'bbb', 'ccc'),
('#mmm',),
('foo', 'bar'),
('a', 1),
('b', 2))
table2 = skip(table1, 2)
expect2 = (('foo', 'bar'),
('a', 1),
('b', 2))
ieq(expect2, table2)
ieq(expect2, table2) # can iterate twice?
def test_skip_empty():
table1 = (('#aaa', 'bbb', 'ccc'),
('#mmm',),
('foo', 'bar'))
table2 = skip(table1, 2)
expect2 = (('foo', 'bar'),)
ieq(expect2, table2)
def test_skip_headerless():
table = []
actual = skip(table, 2)
expect = []
ieq(expect, actual)
def test_rename():
table = (('foo', 'bar'),
('M', 12),
('F', 34),
('-', 56))
result = rename(table, 'foo', 'foofoo')
assert fieldnames(result) == ('foofoo', 'bar')
result = rename(table, 0, 'foofoo')
assert fieldnames(result) == ('foofoo', 'bar')
result = rename(table, {'foo': 'foofoo', 'bar': 'barbar'})
assert fieldnames(result) == ('foofoo', 'barbar')
result = rename(table, {0: 'baz', 1: 'quux'})
assert fieldnames(result) == ('baz', 'quux')
result = rename(table)
result['foo'] = 'spong'
assert fieldnames(result) == ('spong', 'bar')
def test_rename_strict():
table = (('foo', 'bar'),
('M', 12),
('F', 34),
('-', 56))
result = rename(table, 'baz', 'quux')
try:
fieldnames(result)
except FieldSelectionError:
pass
else:
assert False, 'exception expected'
result = rename(table, 2, 'quux')
try:
fieldnames(result)
except FieldSelectionError:
pass
else:
assert False, 'exception expected'
result = rename(table, 'baz', 'quux', strict=False)
assert fieldnames(result) == ('foo', 'bar')
result = rename(table, 2, 'quux', strict=False)
assert fieldnames(result) == ('foo', 'bar')
def test_rename_empty():
table = (('foo', 'bar'),)
expect = (('foofoo', 'bar'),)
actual = rename(table, 'foo', 'foofoo')
ieq(expect, actual)
def test_rename_headerless():
table = []
with pytest.raises(FieldSelectionError):
for i in rename(table, 'foo', 'foofoo'):
pass
def test_prefixheader():
table1 = (('foo', 'bar'),
(1, 'A'),
(2, 'B'))
expect = (('pre_foo', 'pre_bar'),
(1, 'A'),
(2, 'B'))
actual = prefixheader(table1, 'pre_')
ieq(expect, actual)
ieq(expect, actual)
def test_prefixheader_headerless():
table = []
actual = prefixheader(table, 'pre_')
expect = []
ieq(expect, actual)
def test_suffixheader():
table1 = (('foo', 'bar'),
(1, 'A'),
(2, 'B'))
expect = (('foo_suf', 'bar_suf'),
(1, 'A'),
(2, 'B'))
actual = suffixheader(table1, '_suf')
ieq(expect, actual)
ieq(expect, actual)
def test_suffixheader_headerless():
table = []
actual = suffixheader(table, '_suf')
expect = []
ieq(expect, actual)
def test_sortheaders():
table1 = (
('id', 'foo', 'bar', 'baz'),
('a', 1, 2, 3),
('b', 4, 5, 6))
expect = (
('bar', 'baz', 'foo', 'id'),
(2, 3, 1, 'a'),
(5, 6, 4, 'b'),
)
actual = sortheader(table1)
ieq(expect, actual)
def test_sortheaders_duplicate_headers():
""" Failing test case provided in sortheader()
with duplicate column names overlays values #392 """
table1 = (
('id', 'foo', 'foo', 'foo'),
('a', 1, 2, 3),
('b', 4, 5, 6))
expect = (
('foo', 'foo', 'foo', 'id'),
(1, 2, 3, 'a'),
(4, 5, 6, 'b'),
)
actual = sortheader(table1)
ieq(expect, actual)
def test_sortheader_headerless():
table = []
actual = sortheader(table)
expect = []
ieq(expect, actual)
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