59 lines
1.8 KiB
Python
59 lines
1.8 KiB
Python
|
import numpy as np
|
||
|
|
import pytest
|
||
|
|
|
||
|
|
from pandas._libs.tslibs import IncompatibleFrequency
|
||
|
|
|
||
|
|
from pandas import (
|
||
|
|
DataFrame,
|
||
|
|
Index,
|
||
|
|
PeriodIndex,
|
||
|
|
date_range,
|
||
|
|
period_range,
|
||
|
|
)
|
||
|
|
import pandas._testing as tm
|
||
|
|
|
||
|
|
|
||
|
|
class TestJoin:
|
||
|
|
def test_join_outer_indexer(self):
|
||
|
|
pi = period_range("1/1/2000", "1/20/2000", freq="D")
|
||
|
|
|
||
|
|
result = pi._outer_indexer(pi)
|
||
|
|
tm.assert_extension_array_equal(result[0], pi._values)
|
||
|
|
tm.assert_numpy_array_equal(result[1], np.arange(len(pi), dtype=np.intp))
|
||
|
|
tm.assert_numpy_array_equal(result[2], np.arange(len(pi), dtype=np.intp))
|
||
|
|
|
||
|
|
def test_joins(self, join_type):
|
||
|
|
index = period_range("1/1/2000", "1/20/2000", freq="D")
|
||
|
|
|
||
|
|
joined = index.join(index[:-5], how=join_type)
|
||
|
|
|
||
|
|
assert isinstance(joined, PeriodIndex)
|
||
|
|
assert joined.freq == index.freq
|
||
|
|
|
||
|
|
def test_join_self(self, join_type):
|
||
|
|
index = period_range("1/1/2000", "1/20/2000", freq="D")
|
||
|
|
|
||
|
|
res = index.join(index, how=join_type)
|
||
|
|
assert index is res
|
||
|
|
|
||
|
|
def test_join_does_not_recur(self):
|
||
|
|
df = DataFrame(
|
||
|
|
np.ones((3, 2)),
|
||
|
|
index=date_range("2020-01-01", periods=3),
|
||
|
|
columns=period_range("2020-01-01", periods=2),
|
||
|
|
)
|
||
|
|
ser = df.iloc[:2, 0]
|
||
|
|
|
||
|
|
res = ser.index.join(df.columns, how="outer")
|
||
|
|
expected = Index(
|
||
|
|
[ser.index[0], ser.index[1], df.columns[0], df.columns[1]], object
|
||
|
|
)
|
||
|
|
tm.assert_index_equal(res, expected)
|
||
|
|
|
||
|
|
def test_join_mismatched_freq_raises(self):
|
||
|
|
index = period_range("1/1/2000", "1/20/2000", freq="D")
|
||
|
|
index3 = period_range("1/1/2000", "1/20/2000", freq="2D")
|
||
|
|
msg = r".*Input has different freq=2D from Period\(freq=D\)"
|
||
|
|
with pytest.raises(IncompatibleFrequency, match=msg):
|
||
|
|
index.join(index3)
|