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68 lines
2 KiB
Python
68 lines
2 KiB
Python
import numpy as np
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import pytest
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from pandas.errors import UnsupportedFunctionCall
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import pandas.util._test_decorators as td
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import pandas as pd
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from pandas import Series
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from pandas.core.window import Window
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@td.skip_if_no_scipy
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def test_constructor(which):
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# GH 12669
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c = which.rolling
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# valid
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c(win_type="boxcar", window=2, min_periods=1)
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c(win_type="boxcar", window=2, min_periods=1, center=True)
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c(win_type="boxcar", window=2, min_periods=1, center=False)
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# not valid
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for w in [2.0, "foo", np.array([2])]:
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with pytest.raises(ValueError, match="min_periods must be an integer"):
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c(win_type="boxcar", window=2, min_periods=w)
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with pytest.raises(ValueError, match="center must be a boolean"):
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c(win_type="boxcar", window=2, min_periods=1, center=w)
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for wt in ["foobar", 1]:
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with pytest.raises(ValueError, match="Invalid win_type"):
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c(win_type=wt, window=2)
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@td.skip_if_no_scipy
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def test_constructor_with_win_type(which, win_types):
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# GH 12669
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c = which.rolling
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c(win_type=win_types, window=2)
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@pytest.mark.parametrize("method", ["sum", "mean"])
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def test_numpy_compat(method):
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# see gh-12811
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w = Window(Series([2, 4, 6]), window=[0, 2])
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msg = "numpy operations are not valid with window objects"
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with pytest.raises(UnsupportedFunctionCall, match=msg):
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getattr(w, method)(1, 2, 3)
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with pytest.raises(UnsupportedFunctionCall, match=msg):
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getattr(w, method)(dtype=np.float64)
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@td.skip_if_no_scipy
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@pytest.mark.parametrize("arg", ["median", "kurt", "skew"])
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def test_agg_function_support(arg):
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df = pd.DataFrame({"A": np.arange(5)})
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roll = df.rolling(2, win_type="triang")
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msg = f"'{arg}' is not a valid function for 'Window' object"
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with pytest.raises(AttributeError, match=msg):
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roll.agg(arg)
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with pytest.raises(AttributeError, match=msg):
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roll.agg([arg])
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with pytest.raises(AttributeError, match=msg):
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roll.agg({"A": arg})
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