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from datetime import datetime
import numpy as np
import pytest
from pandas import (
DataFrame,
Series,
)
# The various methods we support
downsample_methods = [
"min",
"max",
"first",
"last",
"sum",
"mean",
"sem",
"median",
"prod",
"var",
"std",
"ohlc",
"quantile",
]
upsample_methods = ["count", "size"]
series_methods = ["nunique"]
resample_methods = downsample_methods + upsample_methods + series_methods
@pytest.fixture(params=downsample_methods)
def downsample_method(request):
"""Fixture for parametrization of Grouper downsample methods."""
return request.param
@pytest.fixture(params=resample_methods)
def resample_method(request):
"""Fixture for parametrization of Grouper resample methods."""
return request.param
@pytest.fixture
def _index_start():
"""Fixture for parametrization of index, series and frame."""
return datetime(2005, 1, 1)
@pytest.fixture
def _index_end():
"""Fixture for parametrization of index, series and frame."""
return datetime(2005, 1, 10)
@pytest.fixture
def _index_freq():
"""Fixture for parametrization of index, series and frame."""
return "D"
@pytest.fixture
def _index_name():
"""Fixture for parametrization of index, series and frame."""
return None
@pytest.fixture
def index(_index_factory, _index_start, _index_end, _index_freq, _index_name):
"""
Fixture for parametrization of date_range, period_range and
timedelta_range indexes
"""
return _index_factory(_index_start, _index_end, freq=_index_freq, name=_index_name)
@pytest.fixture
def _static_values(index):
"""
Fixture for parametrization of values used in parametrization of
Series and DataFrames with date_range, period_range and
timedelta_range indexes
"""
return np.arange(len(index))
@pytest.fixture
def _series_name():
"""
Fixture for parametrization of Series name for Series used with
date_range, period_range and timedelta_range indexes
"""
return None
@pytest.fixture
def series(index, _series_name, _static_values):
"""
Fixture for parametrization of Series with date_range, period_range and
timedelta_range indexes
"""
return Series(_static_values, index=index, name=_series_name)
@pytest.fixture
def empty_series_dti(series):
"""
Fixture for parametrization of empty Series with date_range,
period_range and timedelta_range indexes
"""
return series[:0]
@pytest.fixture
def frame(index, _series_name, _static_values):
"""
Fixture for parametrization of DataFrame with date_range, period_range
and timedelta_range indexes
"""
# _series_name is intentionally unused
return DataFrame({"value": _static_values}, index=index)
@pytest.fixture
def empty_frame_dti(series):
"""
Fixture for parametrization of empty DataFrame with date_range,
period_range and timedelta_range indexes
"""
index = series.index[:0]
return DataFrame(index=index)
@pytest.fixture
def series_and_frame(frame_or_series, series, frame):
"""
Fixture for parametrization of Series and DataFrame with date_range,
period_range and timedelta_range indexes
"""
if frame_or_series == Series:
return series
if frame_or_series == DataFrame:
return frame
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